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Source code for Intro to QueryDSL article.

This commit is contained in:
sghosh 2016-01-04 00:15:43 +05:30
parent f921036f4f
commit 2435e66439
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querydsl/pom.xml Normal file
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<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>org.baeldung</groupId>
<artifactId>querydsl</artifactId>
<version>0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>querydsl</name>
<url>http://maven.apache.org</url>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<java.version>1.6</java.version>
<junit.version>4.10</junit.version>
<spring.version>3.1.0.RELEASE</spring.version>
<hibernate.version>4.1.1.Final</hibernate.version>
<querydsl.version>2.5.0</querydsl.version>
<slf4j.version>1.5.10</slf4j.version>
</properties>
<dependencies>
<!-- QueryDSL -->
<dependency>
<groupId>com.mysema.querydsl</groupId>
<artifactId>querydsl-core</artifactId>
<version>${querydsl.version}</version>
</dependency>
<dependency>
<groupId>com.mysema.querydsl</groupId>
<artifactId>querydsl-jpa</artifactId>
<version>${querydsl.version}</version>
</dependency>
<dependency>
<groupId>com.mysema.querydsl</groupId>
<artifactId>querydsl-apt</artifactId>
<version>${querydsl.version}</version>
<scope>provided</scope>
</dependency>
<!-- JPA Persistence Dependencies -->
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-entitymanager</artifactId>
<version>${hibernate.version}</version>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>org.hibernate.javax.persistence</groupId>
<artifactId>hibernate-jpa-2.0-api</artifactId>
<version>1.0.0.Final</version>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>commons-dbcp</groupId>
<artifactId>commons-dbcp</artifactId>
<version>1.4</version>
<type>jar</type>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>commons-pool</groupId>
<artifactId>commons-pool</artifactId>
<version>1.5.5</version>
<type>jar</type>
<scope>compile</scope>
</dependency>
<!-- HSQLDB Dependencies -->
<dependency>
<groupId>org.hsqldb</groupId>
<artifactId>hsqldb-j5</artifactId>
<version>2.2.4</version>
</dependency>
<!-- Spring Dependencies -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-orm</artifactId>
<version>${spring.version}</version>
<type>jar</type>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aop</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>${spring.version}</version>
<type>jar</type>
<scope>test</scope>
</dependency>
<!-- Logging -->
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>${slf4j.version}</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>jcl-over-slf4j</artifactId>
<version>${slf4j.version}</version>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
<version>${slf4j.version}</version>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.16</version>
</dependency>
<!-- Test Dependencies -->
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>${junit.version}</version>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<!-- Compile src folder without annotation processing -->
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>2.3.2</version>
<configuration>
<source>${java.version}</source>
<target>${java.version}</target>
<compilerArgument>-proc:none</compilerArgument>
</configuration>
</plugin>
<!-- QueryDSL plugin -->
<plugin>
<groupId>com.mysema.maven</groupId>
<artifactId>maven-apt-plugin</artifactId>
<version>1.0.3</version>
<executions>
<execution>
<goals>
<goal>process</goal>
</goals>
<configuration>
<outputDirectory>target/metamodel</outputDirectory>
<processor>com.mysema.query.apt.jpa.JPAAnnotationProcessor</processor>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
</build>
</project>

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querydsl/src/main/java/org/baeldung/dao/PersonDao.java Normal file
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package org.baeldung.dao;
import org.baeldung.entity.Person;
import java.util.List;
public interface PersonDao {
public Person save(Person person);
public List<Person> findPersonsByFirstnameQueryDSL(String firstname);
}

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querydsl/src/main/java/org/baeldung/dao/PersonDaoImpl.java Normal file
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package org.baeldung.dao;
import com.mysema.query.jpa.impl.JPAQuery;
import org.baeldung.entity.Person;
import org.baeldung.entity.QPerson;
import org.springframework.stereotype.Repository;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
import java.util.List;
@Repository
public class PersonDaoImpl implements PersonDao {
@PersistenceContext
private EntityManager em;
public Person save(Person person) {
em.persist(person);
return person;
}
public List<Person> findPersonsByFirstnameQueryDSL(String firstname) {
JPAQuery query = new JPAQuery(em);
QPerson person = QPerson.person;
return query.from(person).where(person.firstname.eq(firstname)).list(person);
}
}

50
querydsl/src/main/java/org/baeldung/entity/Person.java Normal file
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package org.baeldung.entity;
import javax.persistence.*;
@Entity
public class Person {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private Long id;
@Column
private String firstname;
@Column
private String surname;
Person() {
}
public Person(String firstname, String surname) {
this.firstname = firstname;
this.surname = surname;
}
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 getSurname() {
return surname;
}
public void setSurname(String surname) {
this.surname = surname;
}
}

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querydsl/src/main/resources/META-INF/persistence.xml Normal file
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<?xml version="1.0" encoding="UTF-8"?>
<persistence xmlns="http://java.sun.com/xml/ns/persistence"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/persistence
http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd"
version="2.0">
<!-- PersistenceUnit for datastore -->
<persistence-unit name="default" transaction-type="RESOURCE_LOCAL">
<properties>
<property name="hibernate.hbm2ddl.auto" value="update" />
<property name="hibernate.show_sql" value="true" />
<property name="hibernate.transaction.flush_before_completion"
value="true" />
<property name="hibernate.cache.provider_class" value="org.hibernate.cache.HashtableCacheProvider" />
</properties>
</persistence-unit>
</persistence>

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querydsl/src/main/resources/log4j.xml Normal file
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<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE log4j:configuration SYSTEM "log4j.dtd" >
<log4j:configuration xmlns:log4j="http://jakarta.apache.org/log4j/">
<!-- Appenders -->
<appender name="console" class="org.apache.log4j.ConsoleAppender">
<param name="Target" value="System.out" />
<layout class="org.apache.log4j.PatternLayout">
<param name="ConversionPattern" value="%d{yyyy-MM-dd HH:mm:ss} [%t] %-5p: %c - %m%n" />
</layout>
</appender>
<!-- Application Loggers -->
<logger name="de.slackspace.tutorials">
<level value="debug" />
</logger>
<!-- Spring Loggers -->
<logger name="org.springframework.core">
<level value="info" />
</logger>
<logger name="org.springframework.beans">
<level value="info" />
</logger>
<logger name="org.springframework.context">
<level value="info" />
</logger>
<!-- Hibernate Loggers -->
<logger name="org.hibernate">
<level value="warn" />
</logger>
<!-- Root Logger -->
<root>
<priority value="warn" />
<appender-ref ref="console" />
</root>
</log4j:configuration>

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querydsl/src/test/java/org/baeldung/dao/PersonDaoTest.java Normal file
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package org.baeldung.dao;
import junit.framework.Assert;
import org.baeldung.entity.Person;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
import org.springframework.test.context.transaction.TransactionConfiguration;
import org.springframework.transaction.annotation.Transactional;
@ContextConfiguration("/test-context.xml")
@RunWith(SpringJUnit4ClassRunner.class)
@Transactional
@TransactionConfiguration(defaultRollback=true)
public class PersonDaoTest {
@Autowired
private PersonDao personDao;
@Test
public void testCreation() {
personDao.save(new Person("Erich", "Gamma"));
Person person = new Person("Kent", "Beck");
personDao.save(person);
personDao.save(new Person("Ralph", "Johnson"));
Person personFromDb = personDao.findPersonsByFirstnameQueryDSL("Kent").get(0);
Assert.assertEquals(person.getId(), personFromDb.getId());
}
}

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querydsl/src/test/resources/db.properties Normal file
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#In memory db
db.username=sa
db.password=
db.driver=org.hsqldb.jdbcDriver
db.url=jdbc:hsqldb:mem:app-db
db.dialect=org.hibernate.dialect.HSQLDialect

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querydsl/src/test/resources/test-context.xml Normal file
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<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:context="http://www.springframework.org/schema/context" xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:sec="http://www.springframework.org/schema/security"
xmlns:aop="http://www.springframework.org/schema/aop"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd
http://www.springframework.org/schema/security http://www.springframework.org/schema/security/spring-security-3.0.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd"
>
<tx:annotation-driven />
<context:component-scan base-package="org.baeldung" />
<import resource="test-db.xml" />
</beans>

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querydsl/src/test/resources/test-db.xml Normal file
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<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd" default-autowire="byName">
<bean id="placeholderConfig"
class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="locations">
<list>
<value>classpath:db.properties</value>
</list>
</property>
</bean>
<bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean" name="EntityManagerFactory">
<property name="persistenceUnitName" value="default"></property>
<property name="dataSource" ref="dataSource"></property>
<property name="jpaVendorAdapter">
<bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter">
<property name="showSql" value="true" />
<property name="generateDdl" value="true" />
<property name="databasePlatform" value="${db.dialect}" />
</bean>
</property>
</bean>
<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"
destroy-method="close">
<property name="driverClassName" value="${db.driver}" />
<property name="url" value="${db.url}" />
<property name="username" value="${db.username}" />
<property name="password" value="${db.password}" />
</bean>
<bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager" name="TransactionManager">
<property name="entityManagerFactory" ref="entityManagerFactory"></property>
</bean>
<tx:annotation-driven />
<bean class="org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor" />
</beans>