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rozagerardorozagerardo
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moved Rest Pagination article code from spring-rest-full to spring-boot-rest
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‎spring-boot-rest/README.md

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@@ -2,3 +2,4 @@ Module for the articles that are part of the Spring REST E-book:
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1. [Bootstrap a Web Application with Spring 5](https://www.baeldung.com/bootstraping-a-web-application-with-spring-and-java-based-configuration)
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2. [Error Handling for REST with Spring](http://www.baeldung.com/exception-handling-for-rest-with-spring)
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3. [REST Pagination in Spring](http://www.baeldung.com/rest-api-pagination-in-spring)

‎spring-boot-rest/pom.xml

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<?xml version="1.0" encoding="UTF-8"?>
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<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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<project xmlns="http://maven.apache.org/POM/4.0.0"
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xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
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<modelVersion>4.0.0</modelVersion>
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<groupId>com.baeldung.web</groupId>
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<groupId>com.fasterxml.jackson.dataformat</groupId>
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<artifactId>jackson-dataformat-xml</artifactId>
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</dependency>
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<dependency>
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<dependency>
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<groupId>org.hibernate</groupId>
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<artifactId>hibernate-entitymanager</artifactId>
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</dependency>
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<dependency>
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<groupId>org.springframework</groupId>
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<artifactId>spring-jdbc</artifactId>
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</dependency>
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<dependency>
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<groupId>org.springframework.data</groupId>
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<artifactId>spring-data-jpa</artifactId>
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</dependency>
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<dependency>
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<groupId>com.h2database</groupId>
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<artifactId>h2</artifactId>
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</dependency>
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<dependency>
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<groupId>org.springframework</groupId>
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<artifactId>spring-tx</artifactId>
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</dependency>
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<dependency>
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<groupId>org.springframework.data</groupId>
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<artifactId>spring-data-commons</artifactId>
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</dependency>
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<!-- util -->
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<dependency>
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<groupId>com.google.guava</groupId>
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<artifactId>guava</artifactId>
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<version>${guava.version}</version>
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</dependency>
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<dependency>
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<groupId>org.springframework.boot</groupId>
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<properties>
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<start-class>com.baeldung.SpringBootRestApplication</start-class>
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<htmlunit.version>2.32</htmlunit.version>
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<guava.version>27.0.1-jre</guava.version>
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</properties>
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</project>

‎spring-boot-rest/src/main/java/com/baeldung/web/SpringBootRestApplication.java renamed to ‎spring-boot-rest/src/main/java/com/baeldung/SpringBootRestApplication.java

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package com.baeldung.web;
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package com.baeldung;
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import org.springframework.boot.SpringApplication;
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import org.springframework.boot.autoconfigure.SpringBootApplication;

‎spring-boot-rest/src/main/java/com/baeldung/persistence/IOperations.java

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package com.baeldung.persistence;
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import java.io.Serializable;
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import org.springframework.data.domain.Page;
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public interface IOperations<T extends Serializable> {
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// read - all
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Page<T> findPaginated(int page, int size);
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// write
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T create(final T entity);
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}

‎spring-boot-rest/src/main/java/com/baeldung/persistence/dao/IFooDao.java

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package com.baeldung.persistence.dao;
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import org.springframework.data.jpa.repository.JpaRepository;
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import com.baeldung.persistence.model.Foo;
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public interface IFooDao extends JpaRepository<Foo, Long> {
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}

‎spring-boot-rest/src/main/java/com/baeldung/persistence/model/Foo.java

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

‎spring-boot-rest/src/main/java/com/baeldung/persistence/service/IFooService.java

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package com.baeldung.persistence.service;
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import org.springframework.data.domain.Page;
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import org.springframework.data.domain.Pageable;
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import com.baeldung.persistence.IOperations;
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import com.baeldung.persistence.model.Foo;
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public interface IFooService extends IOperations<Foo> {
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Page<Foo> findPaginated(Pageable pageable);
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}

‎spring-boot-rest/src/main/java/com/baeldung/persistence/service/common/AbstractService.java

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package com.baeldung.persistence.service.common;
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import java.io.Serializable;
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import org.springframework.data.domain.Page;
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import org.springframework.data.domain.PageRequest;
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import org.springframework.data.repository.PagingAndSortingRepository;
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import org.springframework.transaction.annotation.Transactional;
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import com.baeldung.persistence.IOperations;
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@Transactional
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public abstract class AbstractService<T extends Serializable> implements IOperations<T> {
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// read - all
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@Override
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public Page<T> findPaginated(final int page, final int size) {
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return getDao().findAll(PageRequest.of(page, size));
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}
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// write
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@Override
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public T create(final T entity) {
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return getDao().save(entity);
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}
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protected abstract PagingAndSortingRepository<T, Long> getDao();
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}

‎spring-boot-rest/src/main/java/com/baeldung/persistence/service/impl/FooService.java

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package com.baeldung.persistence.service.impl;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.data.domain.Page;
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import org.springframework.data.domain.Pageable;
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import org.springframework.data.repository.PagingAndSortingRepository;
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import org.springframework.stereotype.Service;
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import org.springframework.transaction.annotation.Transactional;
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import com.baeldung.persistence.dao.IFooDao;
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import com.baeldung.persistence.model.Foo;
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import com.baeldung.persistence.service.IFooService;
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import com.baeldung.persistence.service.common.AbstractService;
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@Service
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@Transactional
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public class FooService extends AbstractService<Foo> implements IFooService {
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@Autowired
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private IFooDao dao;
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public FooService() {
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super();
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}
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// API
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@Override
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protected PagingAndSortingRepository<Foo, Long> getDao() {
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return dao;
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}
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// custom methods
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@Override
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public Page<Foo> findPaginated(Pageable pageable) {
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return dao.findAll(pageable);
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}
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}

‎spring-boot-rest/src/main/java/com/baeldung/spring/PersistenceConfig.java

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package com.baeldung.spring;
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import java.util.Properties;
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import javax.sql.DataSource;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.context.annotation.Bean;
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import org.springframework.context.annotation.ComponentScan;
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import org.springframework.context.annotation.Configuration;
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import org.springframework.context.annotation.PropertySource;
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import org.springframework.core.env.Environment;
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import org.springframework.dao.annotation.PersistenceExceptionTranslationPostProcessor;
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import org.springframework.data.jpa.repository.config.EnableJpaRepositories;
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import org.springframework.jdbc.datasource.DriverManagerDataSource;
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import org.springframework.orm.jpa.JpaTransactionManager;
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import org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean;
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import org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter;
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import org.springframework.transaction.PlatformTransactionManager;
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import org.springframework.transaction.annotation.EnableTransactionManagement;
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import com.google.common.base.Preconditions;
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@Configuration
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@EnableTransactionManagement
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@PropertySource({ "classpath:persistence-${envTarget:h2}.properties" })
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@ComponentScan({ "com.baeldung.persistence" })
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// @ImportResource("classpath*:springDataPersistenceConfig.xml")
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@EnableJpaRepositories(basePackages = "com.baeldung.persistence.dao")
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public class PersistenceConfig {
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@Autowired
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private Environment env;
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public PersistenceConfig() {
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super();
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}
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@Bean
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public LocalContainerEntityManagerFactoryBean entityManagerFactory() {
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final LocalContainerEntityManagerFactoryBean em = new LocalContainerEntityManagerFactoryBean();
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em.setDataSource(dataSource());
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em.setPackagesToScan(new String[] { "com.baeldung.persistence.model" });
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final HibernateJpaVendorAdapter vendorAdapter = new HibernateJpaVendorAdapter();
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// vendorAdapter.set
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em.setJpaVendorAdapter(vendorAdapter);
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em.setJpaProperties(additionalProperties());
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return em;
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}
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@Bean
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public DataSource dataSource() {
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final DriverManagerDataSource dataSource = new DriverManagerDataSource();
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dataSource.setDriverClassName(Preconditions.checkNotNull(env.getProperty("jdbc.driverClassName")));
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dataSource.setUrl(Preconditions.checkNotNull(env.getProperty("jdbc.url")));
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dataSource.setUsername(Preconditions.checkNotNull(env.getProperty("jdbc.user")));
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dataSource.setPassword(Preconditions.checkNotNull(env.getProperty("jdbc.pass")));
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return dataSource;
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}
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@Bean
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public PlatformTransactionManager transactionManager() {
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final JpaTransactionManager transactionManager = new JpaTransactionManager();
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transactionManager.setEntityManagerFactory(entityManagerFactory().getObject());
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return transactionManager;
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}
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@Bean
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public PersistenceExceptionTranslationPostProcessor exceptionTranslation() {
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return new PersistenceExceptionTranslationPostProcessor();
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}
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final Properties additionalProperties() {
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final Properties hibernateProperties = new Properties();
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hibernateProperties.setProperty("hibernate.hbm2ddl.auto", env.getProperty("hibernate.hbm2ddl.auto"));
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hibernateProperties.setProperty("hibernate.dialect", env.getProperty("hibernate.dialect"));
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// hibernateProperties.setProperty("hibernate.globally_quoted_identifiers", "true");
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return hibernateProperties;
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}
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}

‎spring-boot-rest/src/main/java/com/baeldung/spring/WebConfig.java

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package com.baeldung.spring;
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import org.springframework.context.annotation.Bean;
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import org.springframework.context.annotation.ComponentScan;
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import org.springframework.context.annotation.Configuration;
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import org.springframework.http.MediaType;
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import org.springframework.web.servlet.ViewResolver;
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import org.springframework.web.servlet.config.annotation.ContentNegotiationConfigurer;
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import org.springframework.web.servlet.config.annotation.EnableWebMvc;
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import org.springframework.web.servlet.config.annotation.ViewControllerRegistry;
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import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
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import org.springframework.web.servlet.view.InternalResourceViewResolver;
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@Configuration
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@ComponentScan("com.baeldung.web")
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@EnableWebMvc
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public class WebConfig implements WebMvcConfigurer {
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public WebConfig() {
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super();
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}
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@Bean
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public ViewResolver viewResolver() {
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final InternalResourceViewResolver viewResolver = new InternalResourceViewResolver();
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viewResolver.setPrefix("/WEB-INF/view/");
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viewResolver.setSuffix(".jsp");
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return viewResolver;
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}
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// API
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@Override
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public void addViewControllers(final ViewControllerRegistry registry) {
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registry.addViewController("/graph.html");
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registry.addViewController("/homepage.html");
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}
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@Override
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public void configureContentNegotiation(ContentNegotiationConfigurer configurer) {
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configurer.defaultContentType(MediaType.APPLICATION_JSON);
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}
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}

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