BAEL-3091: The Prototype Pattern in Java (changed code based on valid comments from a reader)

spring-5/src/docs/asciidocs/api-guide.adoc

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+= RESTful Notes API Guide
+Baeldung;
+:doctype: book
+:icons: font
+:source-highlighter: highlightjs
+:toc: left
+:toclevels: 4
+:sectlinks:
+
+[[overview]]
+= Overview
+
+[[overview-http-verbs]]
+== HTTP verbs
+
+RESTful notes tries to adhere as closely as possible to standard HTTP and REST conventions in its
+use of HTTP verbs.
+
+|===
+| Verb | Usage
+
+| `GET`
+| Used to retrieve a resource
+
+| `POST`
+| Used to create a new resource
+
+| `PATCH`
+| Used to update an existing resource, including partial updates
+
+| `DELETE`
+| Used to delete an existing resource
+|===
+
+RESTful notes tries to adhere as closely as possible to standard HTTP and REST conventions in its
+use of HTTP status codes.
+
+|===
+| Status code | Usage
+
+| `200 OK`
+| The request completed successfully
+
+| `201 Created`
+| A new resource has been created successfully. The resource's URI is available from the response's
+`Location` header
+
+| `204 No Content`
+| An update to an existing resource has been applied successfully
+
+| `400 Bad Request`
+| The request was malformed. The response body will include an error providing further information
+
+| `404 Not Found`
+| The requested resource did not exist
+|===
+
+[[overview-hypermedia]]
+== Hypermedia
+
+RESTful Notes uses hypermedia and resources include links to other resources in their
+responses. Responses are in http://stateless.co/hal_specification.html[Hypertext Application
+from resource to resource.
+Language (HAL)] format. Links can be found beneath the `_links` key. Users of the API should
+not create URIs themselves, instead they should use the above-described links to navigate
+
+[[resources]]
+= Resources
+
+
+
+[[resources-index]]
+== Index
+
+The index provides the entry point into the service.
+
+[[resources-index-access]]
+=== Accessing the index
+
+A `GET` request is used to access the index
+
+==== Request structure
+
+include::{snippets}/index-example/http-request.adoc[]
+
+==== Example response
+
+include::{snippets}/index-example/http-response.adoc[]
+
+==== CURL request
+
+include::{snippets}/index-example/curl-request.adoc[]
+
+[[resources-index-links]]
+==== Links
+
+include::{snippets}/index-example/links.adoc[]
+
+
+[[resources-CRUD]]
+== CRUD REST Service 
+
+The CRUD provides the entry point into the service.
+
+[[resources-crud-get]]
+=== Accessing the crud GET
+
+A `GET` request is used to access the CRUD read.
+
+==== Request structure
+
+include::{snippets}/crud-get-example/http-request.adoc[]
+
+==== Example response
+
+include::{snippets}/crud-get-example/http-response.adoc[]
+
+==== CURL request
+
+include::{snippets}/crud-get-example/curl-request.adoc[]
+
+[[resources-crud-post]]
+=== Accessing the crud POST
+
+A `POST` request is used to access the CRUD create.
+
+==== Request structure
+
+include::{snippets}/crud-create-example/http-request.adoc[]
+
+==== Example response
+
+include::{snippets}/crud-create-example/http-response.adoc[]
+
+==== CURL request
+
+include::{snippets}/crud-create-example/curl-request.adoc[]
+
+[[resources-crud-delete]]
+=== Accessing the crud DELETE
+
+A `DELETE` request is used to access the CRUD delete.
+
+==== Request structure
+
+include::{snippets}/crud-delete-example/http-request.adoc[]
+
+==== Path Parameters
+include::{snippets}/crud-delete-example/path-parameters.adoc[]
+
+==== Example response
+
+include::{snippets}/crud-delete-example/http-response.adoc[]
+
+==== CURL request
+
+include::{snippets}/crud-delete-example/curl-request.adoc[]
+
+[[resources-crud-patch]]
+=== Accessing the crud PATCH
+
+A `PATCH` request is used to access the CRUD update.
+
+==== Request structure
+
+include::{snippets}/crud-patch-example/http-request.adoc[]
+
+==== Example response
+
+include::{snippets}/crud-patch-example/http-response.adoc[]
+
+==== CURL request
+
+include::{snippets}/crud-patch-example/curl-request.adoc[]
+
+[[resources-crud-put]]
+=== Accessing the crud PUT
+
+A `PUT` request is used to access the CRUD update.
+
+==== Request structure
+
+include::{snippets}/crud-put-example/http-request.adoc[]
+
+==== Example response
+
+include::{snippets}/crud-put-example/http-response.adoc[]
+
+==== CURL request
+
+include::{snippets}/crud-put-example/curl-request.adoc[]
+
+
+
+

spring-5/src/main/java/com/baeldung/Spring5Application.java

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+package com.baeldung;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class Spring5Application {
+
+    public static void main(String[] args) {
+        SpringApplication.run(Spring5Application.class, args);
+    }
+
+}

spring-5/src/main/java/com/baeldung/annotationconfigvscomponentscan/components/AccountService.java

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+package com.baeldung.annotationconfigvscomponentscan.components;
+
+import org.springframework.stereotype.Component;
+
+@Component
+public class AccountService {
+
+}

spring-5/src/main/java/com/baeldung/annotationconfigvscomponentscan/components/UserService.java

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+package com.baeldung.annotationconfigvscomponentscan.components;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Component;
+
+@Component
+public class UserService {
+
+    @Autowired
+    private AccountService accountService;
+
+    public AccountService getAccountService() {
+        return accountService;
+    }
+
+}

spring-5/src/main/java/com/baeldung/assertions/Car.java

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+package com.baeldung.assertions;
+
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+import org.springframework.util.Assert;
+
+public class Car {
+    private String state = "stop";
+
+    public void drive(int speed) {
+        Assert.isTrue(speed > 0, "speed must be positive");
+        this.state = "drive";
+        // ...
+        if (!(speed > 0)) {
+            throw new IllegalArgumentException("speed must be >0");
+        }
+    }
+
+    public void stop() {
+        this.state = "stop";
+    }
+
+    public void fuel() {
+        Assert.state(this.state.equals("stop"), "car must be stopped");
+        // ...
+    }
+
+    public void fuelwithSupplier() {
+        Assert.state(this.state.equals("stop"), () -> "car must be stopped");
+        // ...
+    }
+
+    public void сhangeOil(String oil) {
+        Assert.notNull(oil, "oil mustn't be null");
+        // ...
+    }
+
+    public void replaceBattery(CarBattery carBattery) {
+        Assert.isNull(carBattery.getCharge(), "to replace battery the charge must be null");
+        // ...
+    }
+
+    public void сhangeEngine(Engine engine) {
+        Assert.isInstanceOf(ToyotaEngine.class, engine);
+        // ...
+    }
+
+    public void repairEngine(Engine engine) {
+        Assert.isAssignable(Engine.class, ToyotaEngine.class);
+        // ...
+    }
+
+    public void startWithHasLength(String key) {
+        Assert.hasLength(key, "key must not be null and must not the empty");
+        // ...
+    }
+
+    public void startWithHasText(String key) {
+        Assert.hasText(key, "key must not be null and must contain at least one non-whitespace  character");
+        // ...
+    }
+
+    public void startWithNotContain(String key) {
+        Assert.doesNotContain(key, "123", "key must not contain 123");
+        // ...
+    }
+
+    public void repair(Collection<String> repairParts) {
+        Assert.notEmpty(repairParts, "collection of repairParts mustn't be empty");
+        // ...
+    }
+
+    public void repair(Map<String, String> repairParts) {
+        Assert.notEmpty(repairParts, "map of repairParts mustn't be empty");
+        // ...
+    }
+
+    public void repair(String[] repairParts) {
+        Assert.notEmpty(repairParts, "array of repairParts must not be empty");
+        // ...
+    }
+
+    public void repairWithNoNull(String[] repairParts) {
+        Assert.noNullElements(repairParts, "array of repairParts must not contain null elements");
+        // ...
+    }
+
+    public static void main(String[] args) {
+        Car car = new Car();
+
+        car.drive(50);
+
+        car.stop();
+
+        car.fuel();
+
+        car.сhangeOil("oil");
+        
+        CarBattery carBattery = new CarBattery();
+        car.replaceBattery(carBattery);
+
+        car.сhangeEngine(new ToyotaEngine());
+
+        car.startWithHasLength(" ");
+        car.startWithHasText("t");
+        car.startWithNotContain("132");
+
+        List<String> repairPartsCollection = new ArrayList<String>();
+        repairPartsCollection.add("part");
+        car.repair(repairPartsCollection);
+
+        Map<String, String> repairPartsMap = new HashMap<String, String>();
+        repairPartsMap.put("1", "part");
+        car.repair(repairPartsMap);
+
+        String[] repairPartsArray = { "part" };
+        car.repair(repairPartsArray);
+
+    }
+}

spring-5/src/main/java/com/baeldung/assertions/CarBattery.java

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+package com.baeldung.assertions;
+
+public class CarBattery {
+    private String charge;
+
+    public String getCharge() {
+        return charge;
+    }
+
+    public void setCharge(String charge) {
+        this.charge = charge;
+    }
+}

spring-5/src/main/java/com/baeldung/assertions/Engine.java

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+package com.baeldung.assertions;
+
+public class Engine {
+}

spring-5/src/main/java/com/baeldung/assertions/ToyotaEngine.java

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+package com.baeldung.assertions;
+
+public class ToyotaEngine extends Engine {
+
+}

spring-5/src/main/java/com/baeldung/config/PersistenceConfig.java

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+package com.baeldung.config;
+
+import org.springframework.boot.autoconfigure.domain.EntityScan;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.data.jpa.repository.config.EnableJpaRepositories;
+
+@Configuration
+@EnableJpaRepositories("com.baeldung.persistence")
+@EntityScan("com.baeldung.web")
+public class PersistenceConfig {
+
+}

spring-5/src/main/java/com/baeldung/exception/ActorController.java

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+package com.baeldung.exception;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.http.HttpStatus;
+import org.springframework.web.bind.annotation.DeleteMapping;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.PutMapping;
+import org.springframework.web.bind.annotation.RestController;
+import org.springframework.web.server.ResponseStatusException;
+
+@RestController
+public class ActorController {
+
+    @Autowired
+    ActorService actorService;
+
+    @GetMapping("/actor/{id}")
+    public String getActorName(@PathVariable("id") int id) {
+        try {
+            return actorService.getActor(id);
+        } catch (ActorNotFoundException ex) {
+            throw new ResponseStatusException(HttpStatus.NOT_FOUND, "Actor Not Found", ex);
+        }
+    }
+
+    @DeleteMapping("/actor/{id}")
+    public String getActor(@PathVariable("id") int id) {
+        return actorService.removeActor(id);
+    }
+
+    @PutMapping("/actor/{id}/{name}")
+    public String updateActorName(@PathVariable("id") int id, @PathVariable("name") String name) {
+        try {
+            return actorService.updateActor(id, name);
+        } catch (ActorNotFoundException ex) {
+            throw new ResponseStatusException(HttpStatus.BAD_REQUEST, "Provide correct Actor Id", ex);
+        }
+    }
+
+}

spring-5/src/main/java/com/baeldung/exception/ActorNotFoundException.java

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+package com.baeldung.exception;
+
+import org.springframework.http.HttpStatus;
+import org.springframework.web.bind.annotation.ResponseStatus;
+
+@ResponseStatus(code = HttpStatus.NOT_FOUND, reason = "Actor Not Found")
+public class ActorNotFoundException extends Exception {
+    private static final long serialVersionUID = 1L;
+
+    public ActorNotFoundException(String errorMessage) {
+        super(errorMessage);
+    }
+}

spring-5/src/main/java/com/baeldung/exception/ActorService.java

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+package com.baeldung.exception;
+
+import java.util.Arrays;
+import java.util.List;
+
+import org.springframework.http.HttpStatus;
+import org.springframework.stereotype.Service;
+import org.springframework.web.server.ResponseStatusException;
+
+@Service
+public class ActorService {
+    List<String> actors = Arrays.asList("Jack Nicholson", "Marlon Brando", "Robert De Niro", "Al Pacino", "Tom Hanks");
+
+    public String getActor(int index) throws ActorNotFoundException {
+        if (index >= actors.size()) {
+            throw new ActorNotFoundException("Actor Not Found in Repsoitory");
+        }
+        return actors.get(index);
+    }
+
+    public String updateActor(int index, String actorName) throws ActorNotFoundException {
+        if (index >= actors.size()) {
+            throw new ActorNotFoundException("Actor Not Found in Repsoitory");
+        }
+        actors.set(index, actorName);
+        return actorName;
+    }
+
+    public String removeActor(int index) {
+        if (index >= actors.size()) {
+            throw new ResponseStatusException(HttpStatus.BAD_REQUEST, "Actor Not Found in Repsoitory");
+        }
+        return actors.remove(index);
+    }
+}

spring-5/src/main/java/com/baeldung/exception/SpringExceptionApplication.java

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+package com.baeldung.exception;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.boot.autoconfigure.security.servlet.SecurityAutoConfiguration;
+import org.springframework.context.annotation.ComponentScan;
+
+@SpringBootApplication(exclude = SecurityAutoConfiguration.class)
+@ComponentScan(basePackages = { "com.baeldung.exception" })
+public class SpringExceptionApplication {
+    public static void main(String[] args) {
+        SpringApplication.run(SpringExceptionApplication.class, args);
+    }
+}

spring-5/src/main/java/com/baeldung/functional/Actor.java

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+package com.baeldung.functional;
+
+class Actor {
+    private String firstname;
+    private String lastname;
+
+    public Actor() {
+    }
+
+    public Actor(String firstname, String lastname) {
+        this.firstname = firstname;
+        this.lastname = lastname;
+    }
+
+    public String getFirstname() {
+        return firstname;
+    }
+
+    public String getLastname() {
+        return lastname;
+    }
+
+}

spring-5/src/main/java/com/baeldung/functional/MyService.java

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+package com.baeldung.functional;
+
+import java.util.Random;
+
+public class MyService {
+
+    public int getRandomNumber() {
+        return (new Random().nextInt(10));
+    }
+
+}

spring-5/src/main/java/com/baeldung/jdbc/autogenkey/repository/MessageRepositoryJDBCTemplate.java

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+package com.baeldung.jdbc.autogenkey.repository;
+
+import java.sql.PreparedStatement;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.jdbc.core.JdbcTemplate;
+import org.springframework.jdbc.support.GeneratedKeyHolder;
+import org.springframework.jdbc.support.KeyHolder;
+import org.springframework.stereotype.Repository;
+
+@Repository
+public class MessageRepositoryJDBCTemplate {
+
+    @Autowired
+    JdbcTemplate jdbcTemplate;
+
+    final String INSERT_MESSAGE_SQL = "insert into sys_message (message) values(?) ";
+
+    public long insert(final String message) {
+        
+        KeyHolder keyHolder = new GeneratedKeyHolder();
+
+        jdbcTemplate.update(connection -> {
+            PreparedStatement ps = connection.prepareStatement(INSERT_MESSAGE_SQL);
+            ps.setString(1, message);
+            return ps;
+        }, keyHolder);
+
+        return (long) keyHolder.getKey();
+    }
+
+    final String SELECT_BY_ID = "select message from sys_message where id = ?";
+
+    public String getMessageById(long id) {
+        return this.jdbcTemplate.queryForObject(SELECT_BY_ID, String.class, new Object[] { id });
+    }
+
+}

spring-5/src/main/java/com/baeldung/jdbc/autogenkey/repository/MessageRepositorySimpleJDBCInsert.java

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+package com.baeldung.jdbc.autogenkey.repository;
+
+import java.util.HashMap;
+import java.util.Map;
+
+import javax.sql.DataSource;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.jdbc.core.simple.SimpleJdbcInsert;
+import org.springframework.stereotype.Repository;
+
+@Repository
+public class MessageRepositorySimpleJDBCInsert {
+
+    SimpleJdbcInsert messageInsert;
+
+    @Autowired
+    public MessageRepositorySimpleJDBCInsert(DataSource dataSource) {
+        messageInsert = new SimpleJdbcInsert(dataSource).withTableName("sys_message").usingGeneratedKeyColumns("id");
+    }
+
+    public long insert(String message) {
+        Map<String, Object> parameters = new HashMap<String, Object>(1);
+        parameters.put("message", message);
+        Number newId = messageInsert.executeAndReturnKey(parameters);
+        return (long) newId;
+    }
+
+}

spring-5/src/main/java/com/baeldung/jsonb/Person.java

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+package com.baeldung.jsonb;
+
+import java.math.BigDecimal;
+import java.time.LocalDate;
+
+import javax.json.bind.annotation.JsonbDateFormat;
+import javax.json.bind.annotation.JsonbNumberFormat;
+import javax.json.bind.annotation.JsonbProperty;
+import javax.json.bind.annotation.JsonbTransient;
+
+public class Person {
+
+    private int id;
+    @JsonbProperty("person-name")
+    private String name;
+    @JsonbProperty(nillable = true)
+    private String email;
+    @JsonbTransient
+    private int age;
+    @JsonbDateFormat("dd-MM-yyyy")
+    private LocalDate registeredDate;
+    private BigDecimal salary;
+
+    public Person() {
+    }
+
+    public Person(int id, String name, String email, int age, LocalDate registeredDate, BigDecimal salary) {
+        super();
+        this.id = id;
+        this.name = name;
+        this.email = email;
+        this.age = age;
+        this.registeredDate = registeredDate;
+        this.salary = salary;
+    }
+
+    public int getId() {
+        return id;
+    }
+
+    public void setId(int id) {
+        this.id = id;
+    }
+
+    public int getAge() {
+        return age;
+    }
+
+    public void setAge(int age) {
+        this.age = age;
+    }
+
+    public String getEmail() {
+        return email;
+    }
+
+    public void setEmail(String email) {
+        this.email = email;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    @JsonbNumberFormat(locale = "en_US", value = "#0.0")
+    public BigDecimal getSalary() {
+        return salary;
+    }
+
+    public void setSalary(BigDecimal salary) {
+        this.salary = salary;
+    }
+
+    public LocalDate getRegisteredDate() {
+        return registeredDate;
+    }
+
+    public void setRegisteredDate(LocalDate registeredDate) {
+        this.registeredDate = registeredDate;
+    }
+
+    @Override
+    public String toString() {
+        StringBuilder builder = new StringBuilder();
+        builder.append("Person [id=");
+        builder.append(id);
+        builder.append(", name=");
+        builder.append(name);
+        builder.append(", email=");
+        builder.append(email);
+        builder.append(", age=");
+        builder.append(age);
+        builder.append(", registeredDate=");
+        builder.append(registeredDate);
+        builder.append(", salary=");
+        builder.append(salary);
+        builder.append("]");
+        return builder.toString();
+    }
+
+    @Override
+    public int hashCode() {
+        final int prime = 31;
+        int result = 1;
+        result = prime * result + id;
+        return result;
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj)
+            return true;
+        if (obj == null)
+            return false;
+        if (getClass() != obj.getClass())
+            return false;
+        Person other = (Person) obj;
+        if (id != other.id)
+            return false;
+        return true;
+    }
+
+}

spring-5/src/main/java/com/baeldung/jsonb/PersonController.java

@@ -0,0 +1,58 @@
+package com.baeldung.jsonb;
+
+import java.math.BigDecimal;
+import java.time.LocalDate;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+
+import javax.annotation.PostConstruct;
+
+import org.springframework.http.HttpStatus;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.ResponseBody;
+import org.springframework.web.bind.annotation.ResponseStatus;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController("/person")
+public class PersonController {
+
+    List<Person> personRepository;
+
+    @PostConstruct
+    public void init() {
+        // @formatter:off
+        personRepository = new ArrayList<>(Arrays.asList(
+            new Person(1, "Jhon", "jhon@test.com", 20, LocalDate.of(2019, 9, 9), BigDecimal.valueOf(1000)), 
+            new Person(2, "Jhon", "jhon1@test.com", 20, LocalDate.of(2019, 9, 9), BigDecimal.valueOf(1500)), 
+            new Person(3, "Jhon", null, 20, LocalDate.of(2019, 9, 9), BigDecimal.valueOf(1000)),  
+            new Person(4, "Tom", "tom@test.com", 21, LocalDate.of(2019, 9, 9), BigDecimal.valueOf(1500)), 
+            new Person(5, "Mark", "mark@test.com", 21, LocalDate.of(2019, 9, 9), BigDecimal.valueOf(1200)), 
+            new Person(6, "Julia", "jhon@test.com", 20, LocalDate.of(2019, 9, 9), BigDecimal.valueOf(1000))));
+        // @formatter:on
+
+    }
+
+    @GetMapping("/person/{id}")
+    @ResponseBody
+    public Person findById(@PathVariable final int id) {
+        return personRepository.get(id);
+    }
+
+    @PostMapping("/person")
+    @ResponseStatus(HttpStatus.OK)
+    @ResponseBody
+    public boolean insertPerson(@RequestBody final Person person) {
+        return personRepository.add(person);
+    }
+
+    @GetMapping("/person")
+    @ResponseBody
+    public List<Person> findAll() {
+        return personRepository;
+    }
+
+}

spring-5/src/main/java/com/baeldung/jsonb/Spring5Application.java

@@ -0,0 +1,31 @@
+package com.baeldung.jsonb;
+
+import java.util.ArrayList;
+import java.util.Collection;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.boot.autoconfigure.http.HttpMessageConverters;
+import org.springframework.boot.autoconfigure.security.servlet.SecurityAutoConfiguration;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.ComponentScan;
+import org.springframework.http.converter.HttpMessageConverter;
+import org.springframework.http.converter.json.JsonbHttpMessageConverter;
+
+@SpringBootApplication(exclude = SecurityAutoConfiguration.class)
+@ComponentScan(basePackages = { "com.baeldung.jsonb" })
+public class Spring5Application {
+
+    public static void main(String[] args) {
+        SpringApplication.run(Spring5Application.class, args);
+    }
+
+    @Bean
+    public HttpMessageConverters customConverters() {
+        Collection<HttpMessageConverter<?>> messageConverters = new ArrayList<>();
+        JsonbHttpMessageConverter jsonbHttpMessageConverter = new JsonbHttpMessageConverter();
+        messageConverters.add(jsonbHttpMessageConverter);
+        return new HttpMessageConverters(true, messageConverters);
+    }
+
+}

spring-5/src/main/java/com/baeldung/jupiter/MethodParameterFactory.java

@@ -0,0 +1,46 @@
+package com.baeldung.jupiter;
+
+import org.springframework.core.MethodParameter;
+import org.springframework.core.annotation.SynthesizingMethodParameter;
+import org.springframework.util.Assert;
+
+import java.lang.reflect.Constructor;
+import java.lang.reflect.Executable;
+import java.lang.reflect.Method;
+import java.lang.reflect.Parameter;
+
+abstract class MethodParameterFactory {
+
+    private MethodParameterFactory() {
+    }
+
+    public static MethodParameter createMethodParameter(Parameter parameter) {
+        Assert.notNull(parameter, "Parameter must not be null");
+        Executable executable = parameter.getDeclaringExecutable();
+        if (executable instanceof Method) {
+            return new MethodParameter((Method) executable, getIndex(parameter));
+        }
+        return new MethodParameter((Constructor<?>) executable, getIndex(parameter));
+    }
+
+    public static SynthesizingMethodParameter createSynthesizingMethodParameter(Parameter parameter) {
+        Assert.notNull(parameter, "Parameter must not be null");
+        Executable executable = parameter.getDeclaringExecutable();
+        if (executable instanceof Method) {
+            return new SynthesizingMethodParameter((Method) executable, getIndex(parameter));
+        }
+        throw new UnsupportedOperationException("Cannot create a SynthesizingMethodParameter for a constructor parameter: " + parameter);
+    }
+
+    private static int getIndex(Parameter parameter) {
+        Assert.notNull(parameter, "Parameter must not be null");
+        Executable executable = parameter.getDeclaringExecutable();
+        Parameter[] parameters = executable.getParameters();
+        for (int i = 0; i < parameters.length; i++) {
+            if (parameters[i] == parameter) {
+                return i;
+            }
+        }
+        throw new IllegalStateException(String.format("Failed to resolve index of parameter [%s] in executable [%s]", parameter, executable.toGenericString()));
+    }
+}

spring-5/src/main/java/com/baeldung/jupiter/ParameterAutowireUtils.java

@@ -0,0 +1,44 @@
+package com.baeldung.jupiter;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.beans.factory.annotation.Qualifier;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.beans.factory.config.DependencyDescriptor;
+import org.springframework.context.ApplicationContext;
+import org.springframework.core.MethodParameter;
+import org.springframework.core.annotation.AnnotatedElementUtils;
+
+import java.lang.annotation.Annotation;
+import java.lang.reflect.AnnotatedElement;
+import java.lang.reflect.Method;
+import java.lang.reflect.Parameter;
+import java.util.Optional;
+
+import static org.springframework.core.annotation.AnnotatedElementUtils.hasAnnotation;
+
+abstract class ParameterAutowireUtils {
+
+    private ParameterAutowireUtils() {
+    }
+
+    public static boolean isAutowirable(Parameter parameter) {
+        return ApplicationContext.class.isAssignableFrom(parameter.getType()) || hasAnnotation(parameter, Autowired.class) || hasAnnotation(parameter, Qualifier.class) || hasAnnotation(parameter, Value.class);
+    }
+
+    public static Object resolveDependency(Parameter parameter, Class<?> containingClass, ApplicationContext applicationContext) {
+
+        boolean required = findMergedAnnotation(parameter, Autowired.class).map(Autowired::required)
+            .orElse(true);
+        MethodParameter methodParameter = (parameter.getDeclaringExecutable() instanceof Method ? MethodParameterFactory.createSynthesizingMethodParameter(parameter) : MethodParameterFactory.createMethodParameter(parameter));
+        DependencyDescriptor descriptor = new DependencyDescriptor(methodParameter, required);
+        descriptor.setContainingClass(containingClass);
+
+        return applicationContext.getAutowireCapableBeanFactory()
+            .resolveDependency(descriptor, null);
+    }
+
+    private static <A extends Annotation> Optional<A> findMergedAnnotation(AnnotatedElement element, Class<A> annotationType) {
+
+        return Optional.ofNullable(AnnotatedElementUtils.findMergedAnnotation(element, annotationType));
+    }
+}

spring-5/src/main/java/com/baeldung/jupiter/SpringExtension.java

@@ -0,0 +1,94 @@
+package com.baeldung.jupiter;
+
+import java.lang.reflect.Constructor;
+import java.lang.reflect.Executable;
+import java.lang.reflect.Method;
+import java.lang.reflect.Parameter;
+
+import org.junit.jupiter.api.extension.AfterAllCallback;
+import org.junit.jupiter.api.extension.AfterEachCallback;
+import org.junit.jupiter.api.extension.BeforeAllCallback;
+import org.junit.jupiter.api.extension.BeforeEachCallback;
+import org.junit.jupiter.api.extension.ExtensionContext;
+import org.junit.jupiter.api.extension.ParameterContext;
+import org.junit.jupiter.api.extension.ParameterResolutionException;
+import org.junit.jupiter.api.extension.ParameterResolver;
+import org.junit.jupiter.api.extension.TestInstancePostProcessor;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.context.ApplicationContext;
+import org.springframework.core.annotation.AnnotatedElementUtils;
+import org.springframework.test.context.TestContextManager;
+import org.springframework.util.Assert;
+
+public class SpringExtension implements BeforeAllCallback, AfterAllCallback, TestInstancePostProcessor, BeforeEachCallback, AfterEachCallback, ParameterResolver {
+
+    private static final ExtensionContext.Namespace namespace = ExtensionContext.Namespace.create(SpringExtension.class);
+
+    @Override
+    public void beforeAll(ExtensionContext context) throws Exception {
+        getTestContextManager(context).beforeTestClass();
+    }
+
+    @Override
+    public void afterAll(ExtensionContext context) throws Exception {
+        try {
+            getTestContextManager(context).afterTestClass();
+        } finally {
+            context.getStore(namespace)
+                .remove(context.getTestClass()
+                    .get());
+        }
+    }
+
+    @Override
+    public void postProcessTestInstance(Object testInstance, ExtensionContext context) throws Exception {
+        getTestContextManager(context).prepareTestInstance(testInstance);
+    }
+
+    @Override
+    public void beforeEach(ExtensionContext context) throws Exception {
+        Object testInstance = context.getTestInstance();
+        Method testMethod = context.getTestMethod()
+            .get();
+        getTestContextManager(context).beforeTestMethod(testInstance, testMethod);
+    }
+
+    @Override
+    public void afterEach(ExtensionContext context) throws Exception {
+        Object testInstance = context.getTestInstance();
+        Method testMethod = context.getTestMethod()
+            .get();
+        Throwable testException = context.getExecutionException()
+            .orElse(null);
+        getTestContextManager(context).afterTestMethod(testInstance, testMethod, testException);
+    }
+
+    @Override
+    public boolean supportsParameter(ParameterContext parameterContext, ExtensionContext extensionContext) throws ParameterResolutionException {
+        Parameter parameter = parameterContext.getParameter();
+        Executable executable = parameter.getDeclaringExecutable();
+        return ((executable instanceof Constructor) && AnnotatedElementUtils.hasAnnotation(executable, Autowired.class)) || ParameterAutowireUtils.isAutowirable(parameter);
+    }
+
+    @Override
+    public Object resolveParameter(ParameterContext parameterContext, ExtensionContext extensionContext) throws ParameterResolutionException {
+        Parameter parameter = parameterContext.getParameter();
+        Class<?> testClass = extensionContext.getTestClass()
+            .get();
+        ApplicationContext applicationContext = getApplicationContext(extensionContext);
+        return ParameterAutowireUtils.resolveDependency(parameter, testClass, applicationContext);
+    }
+
+    private ApplicationContext getApplicationContext(ExtensionContext context) {
+        return getTestContextManager(context).getTestContext()
+            .getApplicationContext();
+    }
+
+    private TestContextManager getTestContextManager(ExtensionContext context) {
+        Assert.notNull(context, "ExtensionContext must not be null");
+        Class<?> testClass = context.getTestClass()
+            .get();
+        ExtensionContext.Store store = context.getStore(namespace);
+        return store.getOrComputeIfAbsent(testClass, TestContextManager::new, TestContextManager.class);
+    }
+}

spring-5/src/main/java/com/baeldung/jupiter/SpringJUnit5Config.java

@@ -0,0 +1,39 @@
+package com.baeldung.jupiter;
+
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.springframework.context.ApplicationContextInitializer;
+import org.springframework.context.ConfigurableApplicationContext;
+import org.springframework.core.annotation.AliasFor;
+import org.springframework.test.context.ContextConfiguration;
+
+import java.lang.annotation.*;
+
+@ExtendWith(SpringExtension.class)
+@ContextConfiguration
+@Documented
+@Inherited
+@Retention(RetentionPolicy.RUNTIME)
+@Target(ElementType.TYPE)
+public @interface SpringJUnit5Config {
+
+    @AliasFor(annotation = ContextConfiguration.class, attribute = "classes")
+    Class<?>[] value() default {};
+
+    @AliasFor(annotation = ContextConfiguration.class)
+    Class<?>[] classes() default {};
+
+    @AliasFor(annotation = ContextConfiguration.class)
+    String[] locations() default {};
+
+    @AliasFor(annotation = ContextConfiguration.class)
+    Class<? extends ApplicationContextInitializer<? extends ConfigurableApplicationContext>>[] initializers() default {};
+
+    @AliasFor(annotation = ContextConfiguration.class)
+    boolean inheritLocations() default true;
+
+    @AliasFor(annotation = ContextConfiguration.class)
+    boolean inheritInitializers() default true;
+
+    @AliasFor(annotation = ContextConfiguration.class)
+    String name() default "";
+}

spring-5/src/main/java/com/baeldung/jupiter/Task.java

@@ -0,0 +1,28 @@
+package com.baeldung.jupiter;
+
+import com.fasterxml.jackson.annotation.JsonProperty;
+
+public class Task {
+
+    private final String name;
+
+    private final int id;
+
+    public Task(@JsonProperty("name") String name, @JsonProperty("id") int id) {
+        this.name = name;
+        this.id = id;
+    }
+
+    public String getName() {
+        return this.name;
+    }
+
+    public int getId() {
+        return this.id;
+    }
+
+    @Override
+    public String toString() {
+        return "Task{" + "name='" + name + '\'' + ", id=" + id + '}';
+    }
+}

spring-5/src/main/java/com/baeldung/jupiter/TestConfig.java

@@ -0,0 +1,19 @@
+package com.baeldung.jupiter;
+
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.support.PropertySourcesPlaceholderConfigurer;
+
+@Configuration
+public class TestConfig {
+
+    @Bean
+    static PropertySourcesPlaceholderConfigurer placeholderConfigurer() {
+        return new PropertySourcesPlaceholderConfigurer();
+    }
+
+    @Bean
+    Task taskName() {
+        return new Task("taskName", 1);
+    }
+}

spring-5/src/main/java/com/baeldung/persistence/DataSetupBean.java

@@ -0,0 +1,27 @@
+package com.baeldung.persistence;
+
+import static org.apache.commons.lang3.RandomStringUtils.randomAlphabetic;
+
+import java.util.stream.IntStream;
+
+import org.springframework.beans.factory.InitializingBean;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Component;
+
+import com.baeldung.web.Foo;
+
+@Component
+public class DataSetupBean implements InitializingBean {
+
+    @Autowired
+    private FooRepository repo;
+
+    //
+
+    @Override
+    public void afterPropertiesSet() throws Exception {
+        IntStream.range(1, 20)
+            .forEach(i -> repo.save(new Foo(randomAlphabetic(8))));
+    }
+
+}

spring-5/src/main/java/com/baeldung/persistence/FooRepository.java

@@ -0,0 +1,9 @@
+package com.baeldung.persistence;
+
+import com.baeldung.web.Foo;
+import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.data.jpa.repository.JpaSpecificationExecutor;
+
+public interface FooRepository extends JpaRepository<Foo, Long>, JpaSpecificationExecutor<Foo> {
+
+}

spring-5/src/main/java/com/baeldung/restdocs/CRUDController.java

@@ -0,0 +1,61 @@
+package com.baeldung.restdocs;
+
+import static org.springframework.hateoas.mvc.ControllerLinkBuilder.linkTo;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import javax.validation.Valid;
+
+import org.springframework.http.HttpHeaders;
+import org.springframework.http.HttpStatus;
+import org.springframework.web.bind.annotation.DeleteMapping;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PatchMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.PutMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.ResponseStatus;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+@RequestMapping("/crud")
+public class CRUDController {
+
+    @GetMapping
+    public List<CrudInput> read(@RequestBody @Valid CrudInput crudInput) {
+        List<CrudInput> returnList = new ArrayList<>();
+        returnList.add(crudInput);
+        return returnList;
+    }
+
+    @ResponseStatus(HttpStatus.CREATED)
+    @PostMapping
+    public HttpHeaders save(@RequestBody @Valid CrudInput crudInput) {
+        HttpHeaders httpHeaders = new HttpHeaders();
+        httpHeaders.setLocation(linkTo(CRUDController.class).slash(crudInput.getId()).toUri());
+        return httpHeaders;
+    }
+
+    @DeleteMapping("/{id}")
+    @ResponseStatus(HttpStatus.OK)
+    HttpHeaders delete(@PathVariable("id") long id) {
+        return new HttpHeaders();
+    }
+
+    @PutMapping("/{id}")
+    @ResponseStatus(HttpStatus.ACCEPTED)
+    void put(@PathVariable("id") long id, @RequestBody CrudInput crudInput) {
+
+    }
+
+    @PatchMapping("/{id}")
+    public List<CrudInput> patch(@PathVariable("id") long id, @RequestBody CrudInput crudInput) {
+        List<CrudInput> returnList = new ArrayList<CrudInput>();
+        crudInput.setId(id);
+        returnList.add(crudInput);
+        return returnList;
+    }
+}

spring-5/src/main/java/com/baeldung/restdocs/CrudInput.java

@@ -0,0 +1,66 @@
+package com.baeldung.restdocs;
+
+import java.net.URI;
+import java.util.Collections;
+import java.util.List;
+
+import javax.validation.constraints.NotBlank;
+import javax.validation.constraints.NotNull;
+
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonProperty;
+
+public class CrudInput {
+    
+    @NotNull
+    private long id;
+    
+    @NotBlank
+    private String title;
+
+    private String body;
+
+    private List<URI> tagUris;
+
+    @JsonCreator
+    public CrudInput(@JsonProperty("id") long id, @JsonProperty("title") String title, @JsonProperty("body") String body, @JsonProperty("tags") List<URI> tagUris) {
+        this.id=id;
+        this.title = title;
+        this.body = body;
+        this.tagUris = tagUris == null ? Collections.<URI> emptyList() : tagUris;
+    }
+
+    public String getTitle() {
+        return title;
+    }
+
+    public String getBody() {
+        return body;
+    }
+    
+    public long getId() {
+        return id;
+    }
+
+    public void setId(long id) {
+        this.id = id;
+    }
+
+    public void setTitle(String title) {
+        this.title = title;
+    }
+
+    public void setBody(String body) {
+        this.body = body;
+    }
+
+    public void setTagUris(List<URI> tagUris) {
+        this.tagUris = tagUris;
+    }
+
+    @JsonProperty("tags")
+    public List<URI> getTagUris() {
+        return this.tagUris;
+    }
+
+}

spring-5/src/main/java/com/baeldung/restdocs/IndexController.java

@@ -0,0 +1,21 @@
+package com.baeldung.restdocs;
+
+import static org.springframework.hateoas.mvc.ControllerLinkBuilder.linkTo;
+
+import org.springframework.hateoas.ResourceSupport;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+@RequestMapping("/")
+public class IndexController {
+
+    @GetMapping
+    public ResourceSupport index() {
+        ResourceSupport index = new ResourceSupport();
+        index.add(linkTo(CRUDController.class).withRel("crud"));
+        return index;
+    }
+
+}

spring-5/src/main/java/com/baeldung/restdocs/SpringRestDocsApplication.java

@@ -0,0 +1,13 @@
+package com.baeldung.restdocs;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.boot.autoconfigure.security.servlet.SecurityAutoConfiguration;
+
+@SpringBootApplication(exclude = SecurityAutoConfiguration.class)
+public class SpringRestDocsApplication {
+
+    public static void main(String[] args) {
+        SpringApplication.run(SpringRestDocsApplication.class, args);
+    }
+}

spring-5/src/main/java/com/baeldung/web/Foo.java

@@ -0,0 +1,84 @@
+package com.baeldung.web;
+
+import javax.persistence.Entity;
+import javax.persistence.GeneratedValue;
+import javax.persistence.GenerationType;
+import javax.persistence.Id;
+
+@Entity
+public class Foo {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.AUTO)
+    private long id;
+
+    private String name;
+
+    public Foo() {
+        super();
+    }
+
+    public Foo(final String name) {
+        super();
+
+        this.name = name;
+    }
+
+    public Foo(final long id, final String name) {
+        super();
+
+        this.id = id;
+        this.name = name;
+    }
+
+    // API
+
+    public long getId() {
+        return id;
+    }
+
+    public void setId(final long id) {
+        this.id = id;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(final String name) {
+        this.name = name;
+    }
+
+    //
+
+    @Override
+    public int hashCode() {
+        final int prime = 31;
+        int result = 1;
+        result = prime * result + ((name == null) ? 0 : name.hashCode());
+        return result;
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj)
+            return true;
+        if (obj == null)
+            return false;
+        if (getClass() != obj.getClass())
+            return false;
+        Foo other = (Foo) obj;
+        if (name == null) {
+            if (other.name != null)
+                return false;
+        } else if (!name.equals(other.name))
+            return false;
+        return true;
+    }
+
+    @Override
+    public String toString() {
+        return "Foo [name=" + name + "]";
+    }
+
+}

spring-5/src/main/java/com/baeldung/web/FooController.java

@@ -0,0 +1,59 @@
+package com.baeldung.web;
+
+import com.baeldung.persistence.FooRepository;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.data.domain.PageRequest;
+import org.springframework.http.HttpStatus;
+import org.springframework.validation.annotation.Validated;
+import org.springframework.web.bind.annotation.*;
+
+import javax.annotation.PostConstruct;
+import javax.validation.constraints.Max;
+import javax.validation.constraints.Min;
+import java.util.List;
+
+@RestController("/foos")
+public class FooController {
+
+    @PostConstruct
+    public void init(){
+        System.out.println("test");
+    }
+
+    @Autowired
+    private FooRepository repo;
+
+    // API - read
+
+    @GetMapping("/foos/{id}")
+    @ResponseBody
+    @Validated
+    public Foo findById(@PathVariable @Min(0) final long id) {
+        return repo.findById(id)
+            .orElse(null);
+    }
+
+    @GetMapping
+    @ResponseBody
+    public List<Foo> findAll() {
+        return repo.findAll();
+    }
+
+    @GetMapping(params = { "page", "size" })
+    @ResponseBody
+    @Validated
+    public List<Foo> findPaginated(@RequestParam("page") @Min(0) final int page, @Max(100) @RequestParam("size") final int size) {
+        return repo.findAll(PageRequest.of(page, size))
+            .getContent();
+    }
+
+    // API - write
+
+    @PutMapping("/foos/{id}")
+    @ResponseStatus(HttpStatus.OK)
+    @ResponseBody
+    public Foo update(@PathVariable("id") final String id, @RequestBody final Foo foo) {
+        return foo;
+    }
+
+}

spring-5/src/main/resources/annotationconfigvscomponentscan-beans.xml

@@ -0,0 +1,15 @@
+<beans xmlns="http://www.springframework.org/schema/beans"
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context"
+    xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">
+
+    <context:annotation-config />
+
+    <context:component-scan base-package="com.baeldung.annotationconfigvscomponentscan.components" />
+
+    <bean id="accountService" class="com.baeldung.annotationconfigvscomponentscan.components.AccountService"></bean>
+
+    <bean id="userService" class="com.baeldung.annotationconfigvscomponentscan.components.UserService">
+        <!-- If we have <context:annotation-config/> on top, then we don't need to set the properties(dependencies) in XML. -->
+        <!-- <property name="accountService" ref="accountService"></property> -->
+    </bean>
+</beans>

spring-5/src/main/resources/application.properties

@@ -0,0 +1,3 @@
+server.port=8081
+
+logging.level.root=INFO

spring-5/src/main/resources/autogenkey-db.properties

@@ -0,0 +1,9 @@
+spring.datasource.url=jdbc:h2:mem:testdb;DB_CLOSE_ON_EXIT=FALSE
+spring.datasource.username=sa
+spring.datasource.password=
+spring.datasource.driverClassName=org.h2.Driver
+spring.jpa.hibernate.ddl-auto=create
+spring.jpa.properties.hibernate.dialect=org.hibernate.dialect.H2Dialect
+
+spring.datasource.initialize=true
+spring.datasource.schema=classpath:autogenkey-schema.sql

spring-5/src/main/resources/autogenkey-schema.sql

@@ -0,0 +1,5 @@
+CREATE TABLE IF NOT EXISTS sys_message (
+  id bigint(20) NOT NULL AUTO_INCREMENT,
+  message varchar(100) NOT NULL,
+  PRIMARY KEY (id)
+);

spring-5/src/main/resources/files/hello.txt

@@ -0,0 +1 @@
+hello

spring-5/src/main/resources/files/test/test.txt

@@ -0,0 +1 @@
+test

spring-5/src/main/resources/logback.xml

@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<configuration>
+    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
+        <encoder>
+            <pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n
+            </pattern>
+        </encoder>
+    </appender>
+
+    <root level="INFO">
+        <appender-ref ref="STDOUT" />
+    </root>
+</configuration>

spring-5/src/main/webapp/WEB-INF/web.xml

@@ -0,0 +1,21 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
+         version="3.1">
+
+    <display-name>Spring Functional Application</display-name>
+
+    <servlet>
+        <servlet-name>functional</servlet-name>
+        <servlet-class>com.baeldung.functional.RootServlet</servlet-class>
+        <load-on-startup>1</load-on-startup>
+        <async-supported>true</async-supported>
+    </servlet>
+    <servlet-mapping>
+        <servlet-name>functional</servlet-name>
+        <url-pattern>/</url-pattern>
+    </servlet-mapping>
+
+
+</web-app>

spring-5/src/test/java/com/baeldung/Example1IntegrationTest.java

@@ -0,0 +1,29 @@
+package com.baeldung;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.test.context.junit4.SpringRunner;
+
+@RunWith(SpringRunner.class)
+@SpringBootTest
+public class Example1IntegrationTest {
+
+    @Test
+    public void test1a() {
+        block(3000);
+    }
+
+    @Test
+    public void test1b() {
+        block(3000);
+    }
+
+    public static void block(long ms) {
+        try {
+            Thread.sleep(ms);
+        } catch (InterruptedException e) {
+            System.out.println("Thread interrupted");
+        }
+    }
+}

spring-5/src/test/java/com/baeldung/Example2IntegrationTest.java

@@ -0,0 +1,29 @@
+package com.baeldung;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.test.context.junit4.SpringRunner;
+
+@RunWith(SpringRunner.class)
+@SpringBootTest
+public class Example2IntegrationTest {
+
+    @Test
+    public void test1a() {
+        block(3000);
+    }
+
+    @Test
+    public void test1b() {
+        block(3000);
+    }
+
+    public static void block(long ms) {
+        try {
+            Thread.sleep(ms);
+        } catch (InterruptedException e) {
+            System.out.println("Thread Interrupted");
+        }
+    }
+}

spring-5/src/test/java/com/baeldung/ParallelIntegrationTest.java

@@ -0,0 +1,24 @@
+package com.baeldung;
+
+import org.junit.Test;
+import org.junit.experimental.ParallelComputer;
+import org.junit.runner.Computer;
+import org.junit.runner.JUnitCore;
+
+public class ParallelIntegrationTest {
+
+    @Test
+    public void runTests() {
+        final Class<?>[] classes = { Example1IntegrationTest.class, Example2IntegrationTest.class };
+
+        JUnitCore.runClasses(new Computer(), classes);
+    }
+
+    @Test
+    public void runTestsInParallel() {
+        final Class<?>[] classes = { Example1IntegrationTest.class, Example2IntegrationTest.class };
+
+        JUnitCore.runClasses(new ParallelComputer(true, true), classes);
+    }
+
+}

spring-5/src/test/java/com/baeldung/Spring5ApplicationIntegrationTest.java

@@ -0,0 +1,18 @@
+package com.baeldung;
+
+import org.junit.Ignore;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.test.context.junit4.SpringRunner;
+
+@RunWith(SpringRunner.class)
+@SpringBootTest
+@Ignore
+public class Spring5ApplicationIntegrationTest {
+
+    @Test
+    public void contextLoads() {
+    }
+
+}

spring-5/src/test/java/com/baeldung/Spring5JUnit4ConcurrentIntegrationTest.java

@@ -0,0 +1,52 @@
+package com.baeldung;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.BeansException;
+import org.springframework.beans.factory.InitializingBean;
+import org.springframework.context.ApplicationContext;
+import org.springframework.context.ApplicationContextAware;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.test.context.ContextConfiguration;
+import org.springframework.test.context.junit4.SpringRunner;
+
+import java.util.concurrent.TimeUnit;
+
+import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.assertTrue;
+
+@RunWith(SpringRunner.class)
+@ContextConfiguration(classes = Spring5JUnit4ConcurrentIntegrationTest.SimpleConfiguration.class)
+public class Spring5JUnit4ConcurrentIntegrationTest implements ApplicationContextAware, InitializingBean {
+
+    @Configuration
+    public static class SimpleConfiguration {
+    }
+
+    private ApplicationContext applicationContext;
+
+    private boolean beanInitialized = false;
+
+    @Override
+    public final void afterPropertiesSet() throws Exception {
+        this.beanInitialized = true;
+    }
+
+    @Override
+    public final void setApplicationContext(final ApplicationContext applicationContext) throws BeansException {
+        this.applicationContext = applicationContext;
+    }
+
+    @Test
+    public final void verifyApplicationContextSet() throws InterruptedException {
+        TimeUnit.SECONDS.sleep(2);
+        assertNotNull("The application context should have been set due to ApplicationContextAware semantics.", this.applicationContext);
+    }
+
+    @Test
+    public final void verifyBeanInitialized() throws InterruptedException {
+        TimeUnit.SECONDS.sleep(2);
+        assertTrue("This test bean should have been initialized due to InitializingBean semantics.", this.beanInitialized);
+    }
+
+}

spring-5/src/test/java/com/baeldung/SpringXMLConfigurationIntegrationTest.java

@@ -0,0 +1,23 @@
+package com.baeldung;
+
+import org.junit.Assert;
+import org.junit.Test;
+import org.springframework.context.ApplicationContext;
+import org.springframework.context.support.ClassPathXmlApplicationContext;
+
+import com.baeldung.annotationconfigvscomponentscan.components.AccountService;
+import com.baeldung.annotationconfigvscomponentscan.components.UserService;
+
+public class SpringXMLConfigurationIntegrationTest {
+
+    @Test
+    public void givenContextAnnotationConfigOrContextComponentScan_whenDependenciesAndBeansAnnotated_thenNoXMLNeeded() {
+        ApplicationContext context = new ClassPathXmlApplicationContext("classpath:annotationconfigvscomponentscan-beans.xml");
+        UserService userService = context.getBean(UserService.class);
+        AccountService accountService = context.getBean(AccountService.class);
+        Assert.assertNotNull(userService);
+        Assert.assertNotNull(accountService);
+        Assert.assertNotNull(userService.getAccountService());
+    }
+
+}

spring-5/src/test/java/com/baeldung/functional/BeanRegistrationIntegrationTest.java

@@ -0,0 +1,42 @@
+package com.baeldung.functional;
+
+import static org.junit.Assert.assertTrue;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.test.context.junit4.SpringRunner;
+import org.springframework.web.context.support.GenericWebApplicationContext;
+
+import com.baeldung.Spring5Application;
+
+@RunWith(SpringRunner.class)
+@SpringBootTest(classes = Spring5Application.class)
+public class BeanRegistrationIntegrationTest {
+
+    @Autowired
+    private GenericWebApplicationContext context;
+
+    @Test
+    public void whenRegisterBean_thenOk() {
+        context.registerBean(MyService.class, () -> new MyService());
+        MyService myService = (MyService) context.getBean("com.baeldung.functional.MyService");
+        assertTrue(myService.getRandomNumber() < 10);
+    }
+
+    @Test
+    public void whenRegisterBeanWithName_thenOk() {
+        context.registerBean("mySecondService", MyService.class, () -> new MyService());
+        MyService mySecondService = (MyService) context.getBean("mySecondService");
+        assertTrue(mySecondService.getRandomNumber() < 10);
+    }
+
+    @Test
+    public void whenRegisterBeanWithCallback_thenOk() {
+        context.registerBean("myCallbackService", MyService.class, () -> new MyService(), bd -> bd.setAutowireCandidate(false));
+        MyService myCallbackService = (MyService) context.getBean("myCallbackService");
+        assertTrue(myCallbackService.getRandomNumber() < 10);
+    }
+
+}

spring-5/src/test/java/com/baeldung/hikari/ApplicationWithHikariConnectionPool.java

@@ -0,0 +1,12 @@
+package com.baeldung.hikari;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class ApplicationWithHikariConnectionPool {
+
+    public static void main(String[] args) {
+        SpringApplication.run(ApplicationWithHikariConnectionPool.class, args);
+    }
+}

spring-5/src/test/java/com/baeldung/hikari/HikariIntegrationTest.java

@@ -0,0 +1,26 @@
+package com.baeldung.hikari;
+
+import static org.junit.Assert.*;
+
+import javax.sql.DataSource;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.test.context.junit4.SpringRunner;
+
+@RunWith(SpringRunner.class)
+@SpringBootTest
+public class HikariIntegrationTest {
+
+    @Autowired
+    private DataSource dataSource;
+
+    @Test
+    public void hikariConnectionPoolIsConfigured() {
+        assertEquals("com.zaxxer.hikari.HikariDataSource", dataSource.getClass()
+            .getName());
+    }
+
+}

spring-5/src/test/java/com/baeldung/jdbc/autogenkey/GetAutoGenKeyByJDBCIntTest.java

@@ -0,0 +1,55 @@
+package com.baeldung.jdbc.autogenkey;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+import org.junit.Ignore;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
+import org.springframework.context.annotation.ComponentScan;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.PropertySource;
+import org.springframework.test.context.junit4.SpringRunner;
+
+import com.baeldung.jdbc.autogenkey.repository.MessageRepositoryJDBCTemplate;
+import com.baeldung.jdbc.autogenkey.repository.MessageRepositorySimpleJDBCInsert;
+
+@RunWith(SpringRunner.class)
+@Ignore
+public class GetAutoGenKeyByJDBCIntTest {
+
+    @Configuration
+    @EnableAutoConfiguration
+    @PropertySource("classpath:autogenkey-db.properties")
+    @ComponentScan(basePackages = { "com.baeldung.jdbc.autogenkey.repository" })
+    public static class SpringConfig {
+
+    }
+
+    @Autowired
+    MessageRepositorySimpleJDBCInsert messageRepositorySimpleJDBCInsert;
+
+    @Autowired
+    MessageRepositoryJDBCTemplate messageRepositoryJDBCTemplate;
+
+    final String MESSAGE_CONTENT = "Test";
+
+    @Test
+    public void insertJDBC_whenLoadMessageByKey_thenGetTheSameMessage() {
+        long key = messageRepositoryJDBCTemplate.insert(MESSAGE_CONTENT);
+        String loadedMessage = messageRepositoryJDBCTemplate.getMessageById(key);
+
+        assertEquals(MESSAGE_CONTENT, loadedMessage);
+
+    }
+
+    @Test
+    public void insertSimpleInsert_whenLoadMessageKey_thenGetTheSameMessage() {
+        long key = messageRepositorySimpleJDBCInsert.insert(MESSAGE_CONTENT);
+        String loadedMessage = messageRepositoryJDBCTemplate.getMessageById(key);
+
+        assertEquals(MESSAGE_CONTENT, loadedMessage);
+    }
+
+}

spring-5/src/test/java/com/baeldung/jsonb/JsonbIntegrationTest.java

@@ -0,0 +1,41 @@
+package com.baeldung.jsonb;
+
+import static org.junit.Assert.assertTrue;
+
+import java.math.BigDecimal;
+import java.time.LocalDate;
+
+import org.junit.Ignore;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.boot.test.web.client.TestRestTemplate;
+import org.springframework.http.ResponseEntity;
+import org.springframework.test.context.junit4.SpringRunner;
+
+@RunWith(SpringRunner.class)
+@SpringBootTest(classes = Spring5Application.class, webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT)
+@Ignore
+public class JsonbIntegrationTest {
+
+    @Autowired
+    private TestRestTemplate template;
+
+    @Test
+    public void givenId_whenUriIsPerson_thenGetPerson() {
+        ResponseEntity<Person> response = template
+            .getForEntity("/person/1", Person.class);
+        Person person = response.getBody();
+        assertTrue(person.equals(new Person(2, "Jhon", "jhon1@test.com", 0, LocalDate.of(2019, 9, 9), BigDecimal.valueOf(1500.0))));
+    }
+
+    @Test
+    public void whenSendPostAPerson_thenGetOkStatus() {
+        ResponseEntity<Boolean> response = template.withBasicAuth("user","password").
+            postForEntity("/person", "{\"birthDate\":\"07-09-2017\",\"email\":\"jhon1@test.com\",\"person-name\":\"Jhon\",\"id\":10}", Boolean.class);
+        assertTrue(response.getBody());
+    }
+
+}

spring-5/src/test/java/com/baeldung/jupiter/EnabledOnJava8.java

@@ -0,0 +1,18 @@
+package com.baeldung.jupiter;
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+import org.springframework.test.context.junit.jupiter.EnabledIf;
+
+@Target({ ElementType.TYPE, ElementType.METHOD })
+@Retention(RetentionPolicy.RUNTIME)
+@EnabledIf(
+    expression = "#{systemProperties['java.version'].startsWith('1.8')}",
+    reason = "Enabled on Java 8"
+)
+public @interface EnabledOnJava8 {
+
+}

spring-5/src/test/java/com/baeldung/jupiter/Spring5EnabledAnnotationIntegrationTest.java

@@ -0,0 +1,50 @@
+package com.baeldung.jupiter;
+
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+import org.junit.jupiter.api.Test;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.test.context.TestPropertySource;
+import org.springframework.test.context.junit.jupiter.DisabledIf;
+import org.springframework.test.context.junit.jupiter.EnabledIf;
+import org.springframework.test.context.junit.jupiter.SpringJUnitConfig;
+
+@SpringJUnitConfig(Spring5EnabledAnnotationIntegrationTest.Config.class)
+@TestPropertySource(properties = { "tests.enabled=true" })
+public class Spring5EnabledAnnotationIntegrationTest {
+    
+    @Configuration
+    static class Config {
+    }
+
+    @EnabledIf("true")
+    @Test
+    void givenEnabledIfLiteral_WhenTrue_ThenTestExecuted() {
+        assertTrue(true);
+    }
+
+    @EnabledIf(expression = "${tests.enabled}", loadContext = true)
+    @Test
+    void givenEnabledIfExpression_WhenTrue_ThenTestExecuted() {
+        assertTrue(true);
+    }
+
+    @EnabledIf("#{systemProperties['java.version'].startsWith('1.8')}")
+    @Test
+    void givenEnabledIfSpel_WhenTrue_ThenTestExecuted() {
+        assertTrue(true);
+    }
+
+    @EnabledOnJava8
+    @Test
+    void givenEnabledOnJava8_WhenTrue_ThenTestExecuted() {
+        assertTrue(true);
+    }
+
+    @DisabledIf("#{systemProperties['java.version'].startsWith('1.7')}")
+    @Test
+    void givenDisabledIf_WhenTrue_ThenTestNotExecuted() {
+        assertTrue(true);
+    }
+
+}

spring-5/src/test/java/com/baeldung/jupiter/Spring5JUnit5ComposedAnnotationIntegrationTest.java

@@ -0,0 +1,37 @@
+package com.baeldung.jupiter;
+
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.context.ApplicationContext;
+
+import java.util.List;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+
+@SpringJUnit5Config(TestConfig.class)
+@DisplayName("@SpringJUnit5Config Tests")
+class Spring5JUnit5ComposedAnnotationIntegrationTest {
+
+    @Autowired
+    private Task task;
+
+    @Autowired
+    private List<Task> tasks;
+
+    @Test
+    @DisplayName("ApplicationContext injected into method")
+    void givenAMethodName_whenInjecting_thenApplicationContextInjectedIntoMethod(ApplicationContext applicationContext) {
+        assertNotNull(applicationContext, "ApplicationContext should have been injected into method by Spring");
+        assertEquals(this.task, applicationContext.getBean("taskName", Task.class));
+    }
+
+    @Test
+    @DisplayName("Spring @Beans injected into fields")
+    void givenAnObject_whenInjecting_thenSpringBeansInjected() {
+        assertNotNull(task, "Task should have been @Autowired by Spring");
+        assertEquals("taskName", task.getName(), "Task's name");
+        assertEquals(1, tasks.size(), "Number of Tasks in context");
+    }
+}

spring-5/src/test/java/com/baeldung/jupiter/Spring5JUnit5IntegrationTest.java

@@ -0,0 +1,24 @@
+package com.baeldung.jupiter;
+
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.context.ApplicationContext;
+import org.springframework.test.context.ContextConfiguration;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+
+@ExtendWith(SpringExtension.class)
+@ContextConfiguration(classes = TestConfig.class)
+class Spring5JUnit5IntegrationTest {
+
+    @Autowired
+    private Task task;
+
+    @Test
+    void givenAMethodName_whenInjecting_thenApplicationContextInjectedIntoMetho(ApplicationContext applicationContext) {
+        assertNotNull(applicationContext, "ApplicationContext should have been injected by Spring");
+        assertEquals(this.task, applicationContext.getBean("taskName", Task.class));
+    }
+}

spring-5/src/test/java/com/baeldung/jupiter/Spring5JUnit5ParallelIntegrationTest.java

@@ -0,0 +1,25 @@
+package com.baeldung.jupiter;
+
+import com.baeldung.Example1IntegrationTest;
+import com.baeldung.Example2IntegrationTest;
+import org.junit.experimental.ParallelComputer;
+import org.junit.jupiter.api.Test;
+import org.junit.runner.Computer;
+import org.junit.runner.JUnitCore;
+
+class Spring5JUnit5ParallelIntegrationTest {
+
+    @Test
+    void givenTwoTestClasses_whenJUnitRunParallel_thenTheTestsExecutingParallel() {
+        final Class<?>[] classes = { Example1IntegrationTest.class, Example2IntegrationTest.class };
+
+        JUnitCore.runClasses(new ParallelComputer(true, true), classes);
+    }
+
+    @Test
+    void givenTwoTestClasses_whenJUnitRunParallel_thenTheTestsExecutingLinear() {
+        final Class<?>[] classes = { Example1IntegrationTest.class, Example2IntegrationTest.class };
+
+        JUnitCore.runClasses(new Computer(), classes);
+    }
+}

spring-5/src/test/java/com/baeldung/jupiter/Spring5Java8NewFeaturesIntegrationTest.java

@@ -0,0 +1,31 @@
+package com.baeldung.jupiter;
+
+import org.junit.jupiter.api.Test;
+
+import java.util.function.Supplier;
+import java.util.regex.Pattern;
+import java.util.stream.Collectors;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+class Spring5Java8NewFeaturesIntegrationTest {
+
+    @FunctionalInterface
+    public interface FunctionalInterfaceExample<Input, Result> {
+        Result reverseString(Input input);
+    }
+
+    public class StringUtils {
+        FunctionalInterfaceExample<String, String> functionLambdaString = s -> Pattern.compile(" +")
+            .splitAsStream(s)
+            .map(word -> new StringBuilder(word).reverse())
+            .collect(Collectors.joining(" "));
+    }
+
+    @Test
+    void givenStringUtil_whenSupplierCall_thenFunctionalInterfaceReverseString() throws Exception {
+        Supplier<StringUtils> stringUtilsSupplier = StringUtils::new;
+
+        assertEquals(stringUtilsSupplier.get().functionLambdaString.reverseString("hello"), "olleh");
+    }
+}

spring-5/src/test/java/com/baeldung/jupiter/SpringJUnitConfigIntegrationTest.java

@@ -0,0 +1,33 @@
+package com.baeldung.jupiter;
+
+import static org.junit.Assert.assertNotNull;
+
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.context.ApplicationContext;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.test.context.junit.jupiter.SpringJUnitConfig;
+
+/**
+ * @SpringJUnitConfig(SpringJUnitConfigTest.Config.class) is equivalent to:
+ * 
+ * @ExtendWith(SpringExtension.class)
+ * @ContextConfiguration(classes = SpringJUnitConfigTest.Config.class )
+ *
+ */
+@SpringJUnitConfig(SpringJUnitConfigIntegrationTest.Config.class)
+public class SpringJUnitConfigIntegrationTest {
+
+    @Configuration
+    static class Config {
+    }
+
+    @Autowired
+    private ApplicationContext applicationContext;
+
+    @Test
+    void givenAppContext_WhenInjected_ThenItShouldNotBeNull() {
+        assertNotNull(applicationContext);
+    }
+
+}

spring-5/src/test/java/com/baeldung/jupiter/SpringJUnitWebConfigIntegrationTest.java

@@ -0,0 +1,34 @@
+package com.baeldung.jupiter;
+
+import static org.junit.Assert.assertNotNull;
+
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.test.context.junit.jupiter.web.SpringJUnitWebConfig;
+import org.springframework.web.context.WebApplicationContext;
+
+/**
+ * @SpringJUnitWebConfig(SpringJUnitWebConfigTest.Config.class) is equivalent to:
+ * 
+ * @ExtendWith(SpringExtension.class)
+ * @WebAppConfiguration
+ * @ContextConfiguration(classes = SpringJUnitWebConfigTest.Config.class )
+ *
+ */
+@SpringJUnitWebConfig(SpringJUnitWebConfigIntegrationTest.Config.class)
+public class SpringJUnitWebConfigIntegrationTest {
+
+    @Configuration
+    static class Config {
+    }
+
+    @Autowired
+    private WebApplicationContext webAppContext;
+
+    @Test
+    void givenWebAppContext_WhenInjected_ThenItShouldNotBeNull() {
+        assertNotNull(webAppContext);
+    }
+
+}

spring-5/src/test/java/com/baeldung/restdocs/ApiDocumentationJUnit4IntegrationTest.java

@@ -0,0 +1,180 @@
+package com.baeldung.restdocs;
+
+import com.baeldung.restdocs.CrudInput;
+import com.baeldung.restdocs.SpringRestDocsApplication;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import org.junit.Before;
+import org.junit.Rule;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.hateoas.MediaTypes;
+import org.springframework.restdocs.JUnitRestDocumentation;
+import org.springframework.restdocs.constraints.ConstraintDescriptions;
+import org.springframework.test.context.junit4.SpringRunner;
+import org.springframework.test.web.servlet.MockMvc;
+import org.springframework.test.web.servlet.setup.MockMvcBuilders;
+import org.springframework.web.context.WebApplicationContext;
+
+import java.util.HashMap;
+import java.util.Map;
+
+import static java.util.Collections.singletonList;
+import static org.springframework.restdocs.headers.HeaderDocumentation.headerWithName;
+import static org.springframework.restdocs.headers.HeaderDocumentation.responseHeaders;
+import static org.springframework.restdocs.hypermedia.HypermediaDocumentation.linkWithRel;
+import static org.springframework.restdocs.hypermedia.HypermediaDocumentation.links;
+import static org.springframework.restdocs.mockmvc.MockMvcRestDocumentation.document;
+import static org.springframework.restdocs.mockmvc.MockMvcRestDocumentation.documentationConfiguration;
+import static org.springframework.restdocs.mockmvc.RestDocumentationRequestBuilders.*;
+import static org.springframework.restdocs.operation.preprocess.Preprocessors.preprocessRequest;
+import static org.springframework.restdocs.operation.preprocess.Preprocessors.preprocessResponse;
+import static org.springframework.restdocs.operation.preprocess.Preprocessors.prettyPrint;
+import static org.springframework.restdocs.payload.PayloadDocumentation.fieldWithPath;
+import static org.springframework.restdocs.payload.PayloadDocumentation.requestFields;
+import static org.springframework.restdocs.payload.PayloadDocumentation.responseFields;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;
+import static org.springframework.util.StringUtils.collectionToDelimitedString;
+import static org.springframework.restdocs.payload.PayloadDocumentation.subsectionWithPath;
+import static org.springframework.restdocs.request.RequestDocumentation.parameterWithName;
+import static org.springframework.restdocs.request.RequestDocumentation.pathParameters;
+
+@RunWith(SpringRunner.class)
+@SpringBootTest(classes = SpringRestDocsApplication.class)
+public class ApiDocumentationJUnit4IntegrationTest {
+
+    @Rule
+    public final JUnitRestDocumentation restDocumentation = new JUnitRestDocumentation("target/generated-snippets");
+
+    @Autowired
+    private WebApplicationContext context;
+
+    @Autowired
+    private ObjectMapper objectMapper;
+
+    private MockMvc mockMvc;
+
+    @Before
+    public void setUp() {
+
+        this.mockMvc = MockMvcBuilders.webAppContextSetup(this.context)
+            .apply(documentationConfiguration(this.restDocumentation))
+            .alwaysDo(document("{method-name}", preprocessRequest(prettyPrint()), preprocessResponse(prettyPrint())))
+            .build();
+    }
+
+    @Test
+    public void indexExample() throws Exception {
+        this.mockMvc.perform(get("/"))
+            .andExpect(status().isOk())
+            .andDo(document("index-example", preprocessRequest(prettyPrint()), preprocessResponse(prettyPrint()), links(linkWithRel("crud").description("The CRUD resource")), responseFields(subsectionWithPath("_links").description("Links to other resources")),
+                responseHeaders(headerWithName("Content-Type").description("The Content-Type of the payload, e.g. `application/hal+json`"))));
+    }
+
+    @Test
+    public void crudGetExample() throws Exception {
+
+        Map<String, Object> crud = new HashMap<>();
+        crud.put("id", 1L);
+        crud.put("title", "Sample Model");
+        crud.put("body", "http://www.baeldung.com/");
+
+        String tagLocation = this.mockMvc.perform(get("/crud").contentType(MediaTypes.HAL_JSON)
+            .content(this.objectMapper.writeValueAsString(crud)))
+            .andExpect(status().isOk())
+            .andReturn()
+            .getResponse()
+            .getHeader("Location");
+
+        crud.put("tags", singletonList(tagLocation));
+
+        ConstraintDescriptions desc = new ConstraintDescriptions(CrudInput.class);
+
+        this.mockMvc.perform(get("/crud").contentType(MediaTypes.HAL_JSON)
+            .content(this.objectMapper.writeValueAsString(crud)))
+            .andExpect(status().isOk())
+            .andDo(document("crud-get-example", preprocessRequest(prettyPrint()), preprocessResponse(prettyPrint()), requestFields(fieldWithPath("id").description("The id of the input" + collectionToDelimitedString(desc.descriptionsForProperty("id"), ". ")),
+                fieldWithPath("title").description("The title of the input"), fieldWithPath("body").description("The body of the input"), fieldWithPath("tags").description("An array of tag resource URIs"))));
+    }
+
+    @Test
+    public void crudCreateExample() throws Exception {
+        Map<String, Object> crud = new HashMap<>();
+        crud.put("id", 2L);
+        crud.put("title", "Sample Model");
+        crud.put("body", "http://www.baeldung.com/");
+
+        String tagLocation = this.mockMvc.perform(post("/crud").contentType(MediaTypes.HAL_JSON)
+            .content(this.objectMapper.writeValueAsString(crud)))
+            .andExpect(status().isCreated())
+            .andReturn()
+            .getResponse()
+            .getHeader("Location");
+
+        crud.put("tags", singletonList(tagLocation));
+
+        this.mockMvc.perform(post("/crud").contentType(MediaTypes.HAL_JSON)
+            .content(this.objectMapper.writeValueAsString(crud)))
+            .andExpect(status().isCreated())
+            .andDo(document("crud-create-example", preprocessRequest(prettyPrint()), preprocessResponse(prettyPrint()), requestFields(fieldWithPath("id").description("The id of the input"), fieldWithPath("title").description("The title of the input"),
+                fieldWithPath("body").description("The body of the input"), fieldWithPath("tags").description("An array of tag resource URIs"))));
+    }
+
+    @Test
+    public void crudDeleteExample() throws Exception {
+        this.mockMvc.perform(delete("/crud/{id}", 10))
+            .andExpect(status().isOk())
+            .andDo(document("crud-delete-example", pathParameters(parameterWithName("id").description("The id of the input to delete"))));
+    }
+
+    @Test
+    public void crudPatchExample() throws Exception {
+
+        Map<String, String> tag = new HashMap<>();
+        tag.put("name", "PATCH");
+
+        String tagLocation = this.mockMvc.perform(patch("/crud/{id}", 10).contentType(MediaTypes.HAL_JSON)
+            .content(this.objectMapper.writeValueAsString(tag)))
+            .andExpect(status().isOk())
+            .andReturn()
+            .getResponse()
+            .getHeader("Location");
+
+        Map<String, Object> crud = new HashMap<>();
+        crud.put("title", "Sample Model Patch");
+        crud.put("body", "http://www.baeldung.com/");
+        crud.put("tags", singletonList(tagLocation));
+
+        this.mockMvc.perform(patch("/crud/{id}", 10).contentType(MediaTypes.HAL_JSON)
+            .content(this.objectMapper.writeValueAsString(crud)))
+            .andExpect(status().isOk());
+    }
+
+    @Test
+    public void crudPutExample() throws Exception {
+        Map<String, String> tag = new HashMap<>();
+        tag.put("name", "PUT");
+
+        String tagLocation = this.mockMvc.perform(put("/crud/{id}", 10).contentType(MediaTypes.HAL_JSON)
+            .content(this.objectMapper.writeValueAsString(tag)))
+            .andExpect(status().isAccepted())
+            .andReturn()
+            .getResponse()
+            .getHeader("Location");
+
+        Map<String, Object> crud = new HashMap<>();
+        crud.put("title", "Sample Model");
+        crud.put("body", "http://www.baeldung.com/");
+        crud.put("tags", singletonList(tagLocation));
+
+        this.mockMvc.perform(put("/crud/{id}", 10).contentType(MediaTypes.HAL_JSON)
+            .content(this.objectMapper.writeValueAsString(crud)))
+            .andExpect(status().isAccepted());
+    }
+
+    @Test
+    public void contextLoads() {
+    }
+
+}

spring-5/src/test/java/com/baeldung/restdocs/ApiDocumentationJUnit5IntegrationTest.java

@@ -0,0 +1,173 @@
+package com.baeldung.restdocs;
+
+import static java.util.Collections.singletonList;
+import static org.springframework.restdocs.headers.HeaderDocumentation.headerWithName;
+import static org.springframework.restdocs.headers.HeaderDocumentation.responseHeaders;
+import static org.springframework.restdocs.hypermedia.HypermediaDocumentation.linkWithRel;
+import static org.springframework.restdocs.hypermedia.HypermediaDocumentation.links;
+import static org.springframework.restdocs.mockmvc.MockMvcRestDocumentation.document;
+import static org.springframework.restdocs.mockmvc.MockMvcRestDocumentation.documentationConfiguration;
+import static org.springframework.restdocs.mockmvc.RestDocumentationRequestBuilders.*;
+import static org.springframework.restdocs.operation.preprocess.Preprocessors.preprocessRequest;
+import static org.springframework.restdocs.operation.preprocess.Preprocessors.preprocessResponse;
+import static org.springframework.restdocs.operation.preprocess.Preprocessors.prettyPrint;
+import static org.springframework.restdocs.payload.PayloadDocumentation.fieldWithPath;
+import static org.springframework.restdocs.payload.PayloadDocumentation.requestFields;
+import static org.springframework.restdocs.payload.PayloadDocumentation.responseFields;
+import static org.springframework.restdocs.request.RequestDocumentation.*;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;
+import static org.springframework.util.StringUtils.collectionToDelimitedString;
+
+import java.util.HashMap;
+import java.util.Map;
+
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.hateoas.MediaTypes;
+import org.springframework.restdocs.RestDocumentationContextProvider;
+import org.springframework.restdocs.RestDocumentationExtension;
+import org.springframework.restdocs.constraints.ConstraintDescriptions;
+import static org.springframework.restdocs.payload.PayloadDocumentation.subsectionWithPath;
+import org.springframework.test.context.junit.jupiter.SpringExtension;
+import org.springframework.test.web.servlet.MockMvc;
+import org.springframework.test.web.servlet.setup.MockMvcBuilders;
+import org.springframework.web.context.WebApplicationContext;
+
+import com.baeldung.restdocs.CrudInput;
+import com.baeldung.restdocs.SpringRestDocsApplication;
+import com.fasterxml.jackson.databind.ObjectMapper;
+
+@ExtendWith({ RestDocumentationExtension.class, SpringExtension.class })
+@SpringBootTest(classes = SpringRestDocsApplication.class)
+public class ApiDocumentationJUnit5IntegrationTest {
+
+    @Autowired
+    private ObjectMapper objectMapper;
+
+    private MockMvc mockMvc;
+
+    @BeforeEach
+    public void setUp(WebApplicationContext webApplicationContext, RestDocumentationContextProvider restDocumentation) {
+        this.mockMvc = MockMvcBuilders.webAppContextSetup(webApplicationContext)
+            .apply(documentationConfiguration(restDocumentation))
+            .alwaysDo(document("{method-name}", preprocessRequest(prettyPrint()), preprocessResponse(prettyPrint())))
+            .build();
+    }
+
+    @Test
+    public void indexExample() throws Exception {
+        this.mockMvc.perform(get("/"))
+            .andExpect(status().isOk())
+            .andDo(document("index-example", preprocessRequest(prettyPrint()), preprocessResponse(prettyPrint()), links(linkWithRel("crud").description("The CRUD resource")), responseFields(subsectionWithPath("_links").description("Links to other resources")),
+                responseHeaders(headerWithName("Content-Type").description("The Content-Type of the payload, e.g. `application/hal+json`"))));
+    }
+
+    @Test
+    public void crudGetExample() throws Exception {
+
+        Map<String, Object> crud = new HashMap<>();
+        crud.put("id", 1L);
+        crud.put("title", "Sample Model");
+        crud.put("body", "http://www.baeldung.com/");
+
+        String tagLocation = this.mockMvc.perform(get("/crud").contentType(MediaTypes.HAL_JSON)
+            .content(this.objectMapper.writeValueAsString(crud)))
+            .andExpect(status().isOk())
+            .andReturn()
+            .getResponse()
+            .getHeader("Location");
+
+        crud.put("tags", singletonList(tagLocation));
+
+        ConstraintDescriptions desc = new ConstraintDescriptions(CrudInput.class);
+
+        this.mockMvc.perform(get("/crud").contentType(MediaTypes.HAL_JSON)
+            .content(this.objectMapper.writeValueAsString(crud)))
+            .andExpect(status().isOk())
+            .andDo(document("crud-get-example", preprocessRequest(prettyPrint()), preprocessResponse(prettyPrint()), requestFields(fieldWithPath("id").description("The id of the input" + collectionToDelimitedString(desc.descriptionsForProperty("id"), ". ")),
+                fieldWithPath("title").description("The title of the input"), fieldWithPath("body").description("The body of the input"), fieldWithPath("tags").description("An array of tag resource URIs"))));
+    }
+
+    @Test
+    public void crudCreateExample() throws Exception {
+        Map<String, Object> crud = new HashMap<>();
+        crud.put("id", 2L);
+        crud.put("title", "Sample Model");
+        crud.put("body", "http://www.baeldung.com/");
+
+        String tagLocation = this.mockMvc.perform(post("/crud").contentType(MediaTypes.HAL_JSON)
+            .content(this.objectMapper.writeValueAsString(crud)))
+            .andExpect(status().isCreated())
+            .andReturn()
+            .getResponse()
+            .getHeader("Location");
+
+        crud.put("tags", singletonList(tagLocation));
+
+        this.mockMvc.perform(post("/crud").contentType(MediaTypes.HAL_JSON)
+            .content(this.objectMapper.writeValueAsString(crud)))
+            .andExpect(status().isCreated())
+            .andDo(document("crud-create-example", preprocessRequest(prettyPrint()), preprocessResponse(prettyPrint()), requestFields(fieldWithPath("id").description("The id of the input"), fieldWithPath("title").description("The title of the input"),
+                fieldWithPath("body").description("The body of the input"), fieldWithPath("tags").description("An array of tag resource URIs"))));
+    }
+
+    @Test
+    public void crudDeleteExample() throws Exception {
+        this.mockMvc.perform(delete("/crud/{id}", 10))
+            .andExpect(status().isOk())
+            .andDo(document("crud-delete-example", pathParameters(parameterWithName("id").description("The id of the input to delete"))));
+    }
+
+    @Test
+    public void crudPatchExample() throws Exception {
+
+        Map<String, String> tag = new HashMap<>();
+        tag.put("name", "PATCH");
+
+        String tagLocation = this.mockMvc.perform(patch("/crud/{id}", 10).contentType(MediaTypes.HAL_JSON)
+            .content(this.objectMapper.writeValueAsString(tag)))
+            .andExpect(status().isOk())
+            .andReturn()
+            .getResponse()
+            .getHeader("Location");
+
+        Map<String, Object> crud = new HashMap<>();
+        crud.put("title", "Sample Model Patch");
+        crud.put("body", "http://www.baeldung.com/");
+        crud.put("tags", singletonList(tagLocation));
+
+        this.mockMvc.perform(patch("/crud/{id}", 10).contentType(MediaTypes.HAL_JSON)
+            .content(this.objectMapper.writeValueAsString(crud)))
+            .andExpect(status().isOk());
+    }
+
+    @Test
+    public void crudPutExample() throws Exception {
+        Map<String, String> tag = new HashMap<>();
+        tag.put("name", "PUT");
+
+        String tagLocation = this.mockMvc.perform(put("/crud/{id}", 10).contentType(MediaTypes.HAL_JSON)
+            .content(this.objectMapper.writeValueAsString(tag)))
+            .andExpect(status().isAccepted())
+            .andReturn()
+            .getResponse()
+            .getHeader("Location");
+
+        Map<String, Object> crud = new HashMap<>();
+        crud.put("title", "Sample Model");
+        crud.put("body", "http://www.baeldung.com/");
+        crud.put("tags", singletonList(tagLocation));
+
+        this.mockMvc.perform(put("/crud/{id}", 10).contentType(MediaTypes.HAL_JSON)
+            .content(this.objectMapper.writeValueAsString(crud)))
+            .andExpect(status().isAccepted());
+    }
+
+    @Test
+    public void contextLoads() {
+    }
+
+}

spring-5/src/test/java/org/baeldung/SpringContextIntegrationTest.java

@@ -0,0 +1,17 @@
+package org.baeldung;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.test.context.junit4.SpringRunner;
+
+import com.baeldung.Spring5Application;
+
+@RunWith(SpringRunner.class)
+@SpringBootTest(classes = Spring5Application.class)
+public class SpringContextIntegrationTest {
+
+    @Test
+    public void whenSpringContextIsBootstrapped_thenNoExceptions() {
+    }
+}

spring-5/src/test/java/org/baeldung/SpringContextTest.java

@@ -0,0 +1,17 @@
+package org.baeldung;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.test.context.junit4.SpringRunner;
+
+import com.baeldung.Spring5Application;
+
+@RunWith(SpringRunner.class)
+@SpringBootTest(classes = Spring5Application.class)
+public class SpringContextTest {
+
+    @Test
+    public void whenSpringContextIsBootstrapped_thenNoExceptions() {
+    }
+}

spring-5/src/test/resources/logback-test.xml

@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<configuration>
+    <appender name="stdout" class="ch.qos.logback.core.ConsoleAppender">
+        <layout class="ch.qos.logback.classic.PatternLayout">
+            # Pattern of log message for console appender
+            <Pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n</Pattern>
+        </layout>
+    </appender>
+    
+    <logger name="org.springframework" level="INFO" />
+
+    <root level="INFO">
+        <appender-ref ref="stdout" />
+    </root>
+</configuration>