Merge pull request #8125 from eugenp/revert-8119-BAEL-3275-2

Revert "BAEL-3275: Using blocking queue for pub-sub"

spring-rest-angular/src/main/java/org/baeldung/web/dao/StudentRepository.java

@@ -0,0 +1,9 @@
+package org.baeldung.web.dao;
+
+import org.baeldung.web.entity.Student;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+public interface StudentRepository extends JpaRepository<Student, Long> 
+{
+
+}

spring-rest-angular/src/main/java/org/baeldung/web/entity/Student.java

@@ -0,0 +1,69 @@
+package org.baeldung.web.entity;
+
+import java.io.Serializable;
+
+import javax.persistence.Column;
+import javax.persistence.Entity;
+import javax.persistence.Id;
+
+@Entity
+public class Student implements Serializable {
+
+    /**
+     * 
+     */
+    private static final long serialVersionUID = 1L;
+
+    public Student() {
+    }
+
+    public Student(long id, String name, String gender, Integer age) {
+        super();
+        this.id = id;
+        this.name = name;
+        this.gender = gender;
+        this.age = age;
+    }
+
+    @Id
+    private long id;
+    @Column(nullable = false)
+    private String name;
+    @Column(nullable = false)
+    private String gender;
+    @Column(nullable = false)
+    private Integer age;
+
+    public long getId() {
+        return id;
+    }
+
+    public void setId(long id) {
+        this.id = id;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public String getGender() {
+        return gender;
+    }
+
+    public void setGender(String gender) {
+        this.gender = gender;
+    }
+
+    public Integer getAge() {
+        return age;
+    }
+
+    public void setAge(Integer age) {
+        this.age = age;
+    }
+
+}

spring-rest-angular/src/main/java/org/baeldung/web/exception/MyResourceNotFoundException.java

@@ -0,0 +1,26 @@
+package org.baeldung.web.exception;
+
+public class MyResourceNotFoundException extends RuntimeException {
+
+    /**
+     * 
+     */
+    private static final long serialVersionUID = 4088649120307193208L;
+
+    public MyResourceNotFoundException() {
+        super();
+    }
+
+    public MyResourceNotFoundException(final String message, final Throwable cause) {
+        super(message, cause);
+    }
+
+    public MyResourceNotFoundException(final String message) {
+        super(message);
+    }
+
+    public MyResourceNotFoundException(final Throwable cause) {
+        super(cause);
+    }
+
+}

spring-rest-angular/src/main/java/org/baeldung/web/main/Application.java

@@ -0,0 +1,25 @@
+package org.baeldung.web.main;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Import;
+import org.springframework.web.filter.ShallowEtagHeaderFilter;
+import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
+
+@SpringBootApplication
+@EnableAutoConfiguration
+@Import(PersistenceConfig.class)
+public class Application implements WebMvcConfigurer {
+
+    public static void main(String[] args) {
+        SpringApplication.run(Application.class, args);
+    }
+
+    @Bean
+    public ShallowEtagHeaderFilter shallowEtagHeaderFilter() {
+        return new ShallowEtagHeaderFilter();
+    }
+
+}

spring-rest-angular/src/main/java/org/baeldung/web/main/PersistenceConfig.java

@@ -0,0 +1,33 @@
+package org.baeldung.web.main;
+
+import javax.sql.DataSource;
+
+import org.springframework.boot.autoconfigure.domain.EntityScan;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.ComponentScan;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.data.jpa.repository.config.EnableJpaRepositories;
+import org.springframework.jdbc.core.JdbcTemplate;
+import org.springframework.jdbc.datasource.embedded.EmbeddedDatabase;
+import org.springframework.jdbc.datasource.embedded.EmbeddedDatabaseBuilder;
+import org.springframework.jdbc.datasource.embedded.EmbeddedDatabaseType;
+
+@EnableJpaRepositories("org.baeldung.web.dao")
+@ComponentScan(basePackages = { "org.baeldung.web" })
+@EntityScan("org.baeldung.web.entity")
+@Configuration
+public class PersistenceConfig {
+
+    @Bean
+    public JdbcTemplate getJdbcTemplate() {
+        return new JdbcTemplate(dataSource());
+    }
+
+    @Bean
+    public DataSource dataSource() {
+        EmbeddedDatabaseBuilder builder = new EmbeddedDatabaseBuilder();
+        EmbeddedDatabase db = builder.setType(EmbeddedDatabaseType.HSQL).build();
+        return db;
+    }
+
+}

spring-rest-angular/src/main/java/org/baeldung/web/rest/StudentDirectoryRestController.java

@@ -0,0 +1,29 @@
+package org.baeldung.web.rest;
+
+import org.baeldung.web.entity.Student;
+import org.baeldung.web.exception.MyResourceNotFoundException;
+import org.baeldung.web.service.StudentService;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.data.domain.Page;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestMethod;
+import org.springframework.web.bind.annotation.RequestParam;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+public class StudentDirectoryRestController {
+
+    @Autowired
+    private StudentService service;
+
+    @RequestMapping(value = "/student/get", params = { "page", "size" }, method = RequestMethod.GET, produces = "application/json")
+    public Page<Student> findPaginated(@RequestParam("page") int page, @RequestParam("size") int size) {
+
+        Page<Student> resultPage = service.findPaginated(page, size);
+        if (page > resultPage.getTotalPages()) {
+            throw new MyResourceNotFoundException();
+        }
+        return resultPage;
+    }
+
+}

spring-rest-angular/src/main/java/org/baeldung/web/service/IOperations.java

@@ -0,0 +1,9 @@
+package org.baeldung.web.service;
+
+import org.springframework.data.domain.Page;
+
+public interface IOperations<T> {
+
+    public Page<T> findPaginated(final int page, final int size);
+
+}

spring-rest-angular/src/main/java/org/baeldung/web/service/StudentService.java

@@ -0,0 +1,7 @@
+package org.baeldung.web.service;
+
+import org.baeldung.web.entity.Student;
+
+public interface StudentService extends IOperations<Student> {
+
+}

spring-rest-angular/src/main/java/org/baeldung/web/service/StudentServiceImpl.java

@@ -0,0 +1,21 @@
+package org.baeldung.web.service;
+
+import org.baeldung.web.dao.StudentRepository;
+import org.baeldung.web.entity.Student;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.data.domain.Page;
+import org.springframework.data.domain.PageRequest;
+import org.springframework.stereotype.Service;
+
+@Service
+public class StudentServiceImpl implements StudentService {
+
+    @Autowired
+    private StudentRepository dao;
+
+    @Override
+    public Page<Student> findPaginated(int page, int size) {
+        return dao.findAll(new PageRequest(page, size));
+    }
+
+}