[JAVA-22] Moved articles not in ebook from spring-boot-rest to spring-boot-mvc-2

2020-03-18 10:34:00 +01:00
parent 932eba6929
commit 2261dd80d4
21 changed files with 1080 additions and 5 deletions
@@ -0,0 +1,95 @@
+package com.baeldung.etag;
+
+import java.io.Serializable;
+
+import javax.persistence.Column;
+import javax.persistence.Entity;
+import javax.persistence.GeneratedValue;
+import javax.persistence.GenerationType;
+import javax.persistence.Id;
+import javax.persistence.Version;
+
+@Entity
+public class Foo implements Serializable {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.AUTO)
+    private long id;
+
+    @Column(nullable = false)
+    private String name;
+    
+    @Version
+    private long version;
+
+    public Foo() {
+        super();
+    }
+
+    public Foo(final String name) {
+        super();
+
+        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;
+    }
+
+    public long getVersion() {
+        return version;
+    }
+
+    public void setVersion(long version) {
+        this.version = version;
+    }
+    
+    //
+
+    @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(final Object obj) {
+        if (this == obj)
+            return true;
+        if (obj == null)
+            return false;
+        if (getClass() != obj.getClass())
+            return false;
+        final 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() {
+        final StringBuilder builder = new StringBuilder();
+        builder.append("Foo [name=").append(name).append("]");
+        return builder.toString();
+    }
+
+}
@@ -0,0 +1,58 @@
+package com.baeldung.etag;
+
+import javax.servlet.http.HttpServletResponse;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+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.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;
+import org.springframework.web.server.ResponseStatusException;
+
+@RestController
+@RequestMapping(value = "/foos")
+public class FooController {
+
+	@Autowired
+	private FooDao fooDao;
+
+	@GetMapping(value = "/{id}")
+	public Foo findById(@PathVariable("id") final Long id, final HttpServletResponse response) {
+		return fooDao.findById(id).orElseThrow(() -> new ResponseStatusException(HttpStatus.NOT_FOUND));
+	}
+
+	// Note: the global filter overrides the ETag value we set here. We can still
+	// analyze its behaviour in the Integration Test.
+	@GetMapping(value = "/{id}/custom-etag")
+	public ResponseEntity<Foo> findByIdWithCustomEtag(@PathVariable("id") final Long id,
+			final HttpServletResponse response) {
+		final Foo foo = fooDao.findById(id).orElseThrow(() -> new ResponseStatusException(HttpStatus.NOT_FOUND));
+		return ResponseEntity.ok().eTag(Long.toString(foo.getVersion())).body(foo);
+	}
+
+	@PostMapping
+	@ResponseStatus(HttpStatus.CREATED)
+	public Foo create(@RequestBody final Foo resource, final HttpServletResponse response) {
+		return fooDao.save(resource);
+	}
+
+	@PutMapping(value = "/{id}")
+	@ResponseStatus(HttpStatus.OK)
+	public void update(@PathVariable("id") final Long id, @RequestBody final Foo resource) {
+		fooDao.save(resource);
+	}
+
+	@DeleteMapping(value = "/{id}")
+	@ResponseStatus(HttpStatus.OK)
+	public void delete(@PathVariable("id") final Long id) {
+		fooDao.deleteById(id);
+	}
+
+}
@@ -0,0 +1,8 @@
+package com.baeldung.etag;
+
+import org.springframework.data.repository.CrudRepository;
+import org.springframework.stereotype.Repository;
+
+@Repository
+public interface FooDao extends CrudRepository<Foo, Long>{
+}
@@ -0,0 +1,13 @@
+package com.baeldung.etag;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class SpringBootEtagApplication {
+
+	public static void main(String[] args) {
+        SpringApplication.run(SpringBootEtagApplication.class, args);
+    }
+
+}
@@ -0,0 +1,28 @@
+package com.baeldung.etag;
+
+import org.springframework.boot.web.servlet.FilterRegistrationBean;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.web.filter.ShallowEtagHeaderFilter;
+
+@Configuration
+public class WebConfig {
+
+    // Etags
+
+    // If we're not using Spring Boot we can make use of
+    // AbstractAnnotationConfigDispatcherServletInitializer#getServletFilters
+    @Bean
+    public FilterRegistrationBean<ShallowEtagHeaderFilter> shallowEtagHeaderFilter() {
+        FilterRegistrationBean<ShallowEtagHeaderFilter> filterRegistrationBean = new FilterRegistrationBean<>( new ShallowEtagHeaderFilter());
+        filterRegistrationBean.addUrlPatterns("/foos/*");
+        filterRegistrationBean.setName("etagFilter");
+        return filterRegistrationBean;
+    }
+    
+    // We can also just declare the filter directly
+    // @Bean
+    // public ShallowEtagHeaderFilter shallowEtagHeaderFilter() {
+    // return new ShallowEtagHeaderFilter();
+    // }
+}
@@ -0,0 +1,13 @@
+package com.baeldung.students;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class SpringBootStudentsApplication {
+
+	public static void main(String[] args) {
+        SpringApplication.run(SpringBootStudentsApplication.class, args);
+    }
+
+}
@@ -0,0 +1,53 @@
+package com.baeldung.students;
+
+public class Student {
+    
+    private long id;
+    private String firstName;
+    private String lastName;
+    
+    public Student() {}
+    
+    public Student(String firstName, String lastName) {
+        super();
+        this.firstName = firstName;
+        this.lastName = lastName;
+    }
+    
+    public Student(long id, String firstName, String lastName) {
+        super();
+        this.id = id;
+        this.firstName = firstName;
+        this.lastName = lastName;
+    }
+
+    public long getId() {
+        return id;
+    }
+
+    public void setId(long id) {
+        this.id = id;
+    }
+
+    public String getFirstName() {
+        return firstName;
+    }
+
+    public void setFirstName(String firstName) {
+        this.firstName = firstName;
+    }
+
+    public String getLastName() {
+        return lastName;
+    }
+
+    public void setLastName(String lastName) {
+        this.lastName = lastName;
+    }
+
+    @Override
+    public String toString() {
+        return "Student [id=" + id + ", firstName=" + firstName + ", lastName=" + lastName + "]";
+    }
+
+}
@@ -0,0 +1,74 @@
+package com.baeldung.students;
+
+import java.net.URI;
+import java.net.URISyntaxException;
+import java.util.List;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.http.ResponseEntity;
+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.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.RestController;
+import org.springframework.web.servlet.support.ServletUriComponentsBuilder;
+
+import com.baeldung.students.StudentService;
+
+@RestController
+@RequestMapping("/students")
+public class StudentController {
+
+    @Autowired
+    private StudentService service;
+
+    @GetMapping("/")
+    public List<Student> read() {
+        return service.readAll();
+    }
+
+    @GetMapping("/{id}")
+    public ResponseEntity<Student> read(@PathVariable("id") Long id) {
+        Student foundStudent = service.read(id);
+        if (foundStudent == null) {
+            return ResponseEntity.notFound().build();
+        } else {
+            return ResponseEntity.ok(foundStudent);
+        }
+    }
+
+    @PostMapping("/")
+    public ResponseEntity<Student> create(@RequestBody Student student) throws URISyntaxException {
+        Student createdStudent = service.create(student);
+
+        URI uri = ServletUriComponentsBuilder.fromCurrentRequest()
+            .path("/{id}")
+            .buildAndExpand(createdStudent.getId())
+            .toUri();
+
+        return ResponseEntity.created(uri)
+            .body(createdStudent);
+
+    }
+
+    @PutMapping("/{id}")
+    public ResponseEntity<Student> update(@RequestBody Student student, @PathVariable Long id) {
+        Student updatedStudent = service.update(id, student);
+        if (updatedStudent == null) {
+            return ResponseEntity.notFound().build();
+        } else {
+            return ResponseEntity.ok(updatedStudent);
+        }
+    }
+
+    @DeleteMapping("/{id}")
+    public ResponseEntity<Object> deleteStudent(@PathVariable Long id) {
+        service.delete(id);
+
+        return ResponseEntity.noContent().build();
+    }
+
+}
@@ -0,0 +1,51 @@
+package com.baeldung.students;
+
+import java.util.Arrays;
+import java.util.List;
+import java.util.Map;
+import java.util.concurrent.atomic.AtomicLong;
+import java.util.function.Function;
+import java.util.stream.Collectors;
+
+import org.springframework.stereotype.Service;
+
+@Service
+public class StudentService {
+    
+    // DB repository mock
+    private Map<Long, Student> repository = Arrays.asList(
+        new Student[]{
+                new Student(1, "Alan","Turing"),
+                new Student(2, "Sebastian","Bach"),
+                new Student(3, "Pablo","Picasso"),
+        }).stream()
+        .collect(Collectors.toConcurrentMap(s -> s.getId(), Function.identity()));
+    
+    // DB id sequence mock
+    private AtomicLong sequence = new AtomicLong(3);
+    
+    public List<Student> readAll() {
+        return repository.values().stream().collect(Collectors.toList());
+    }
+    
+    public Student read(Long id) {
+        return repository.get(id);
+    }
+
+    public Student create(Student student) {
+        long key = sequence.incrementAndGet();
+        student.setId(key);
+        repository.put(key, student);
+        return student;
+    }
+    
+    public Student update(Long id, Student student) {
+        student.setId(id);
+        Student oldStudent = repository.replace(id, student);
+        return oldStudent == null ? null : student;
+    }
+    
+    public void delete(Long id) {
+        repository.remove(id);
+    }
+}