Samples for the Intro to QueryDSL article, merged with existing querydsl module. Updated module dependencies. (#476)
This commit is contained in:
Sergey Petunin
Grzegorz Piwowarek
parent
010c6b3ace
commit
89373cd1eb
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@ -14,30 +14,25 @@
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<properties>
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<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
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<java.version>1.6</java.version>
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<junit.version>4.10</junit.version>
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<spring.version>3.1.0.RELEASE</spring.version>
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<hibernate.version>4.3.11.Final</hibernate.version>
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<querydsl.version>2.5.0</querydsl.version>
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<slf4j.version>1.5.10</slf4j.version>
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<java.version>1.8</java.version>
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<junit.version>4.12</junit.version>
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<spring.version>4.3.1.RELEASE</spring.version>
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<hibernate.version>5.2.1.Final</hibernate.version>
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<querydsl.version>4.1.3</querydsl.version>
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<slf4j.version>1.7.21</slf4j.version>
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</properties>
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<dependencies>
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<!-- QueryDSL -->
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<dependency>
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<groupId>com.mysema.querydsl</groupId>
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<artifactId>querydsl-core</artifactId>
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<version>${querydsl.version}</version>
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</dependency>
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<dependency>
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<groupId>com.mysema.querydsl</groupId>
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<groupId>com.querydsl</groupId>
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<artifactId>querydsl-jpa</artifactId>
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<version>${querydsl.version}</version>
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</dependency>
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<dependency>
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<groupId>com.mysema.querydsl</groupId>
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<groupId>com.querydsl</groupId>
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<artifactId>querydsl-apt</artifactId>
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<version>${querydsl.version}</version>
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<scope>provided</scope>
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@ -53,7 +48,7 @@
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<dependency>
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<groupId>org.hibernate.javax.persistence</groupId>
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<artifactId>hibernate-jpa-2.0-api</artifactId>
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<artifactId>hibernate-jpa-2.1-api</artifactId>
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<version>1.0.0.Final</version>
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<scope>compile</scope>
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</dependency>
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@ -69,7 +64,7 @@
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<dependency>
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<groupId>commons-pool</groupId>
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<artifactId>commons-pool</artifactId>
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<version>1.5.5</version>
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<version>1.6</version>
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<type>jar</type>
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<scope>compile</scope>
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</dependency>
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@ -77,8 +72,8 @@
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<!-- HSQLDB Dependencies -->
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<dependency>
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<groupId>org.hsqldb</groupId>
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<artifactId>hsqldb-j5</artifactId>
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<version>2.2.4</version>
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<artifactId>hsqldb</artifactId>
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<version>2.3.4</version>
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</dependency>
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<!-- Spring Dependencies -->
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@ -118,9 +113,9 @@
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<!-- Logging -->
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<dependency>
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<groupId>org.slf4j</groupId>
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<artifactId>slf4j-api</artifactId>
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<version>${slf4j.version}</version>
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<groupId>ch.qos.logback</groupId>
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<artifactId>logback-classic</artifactId>
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<version>1.1.7</version>
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</dependency>
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<dependency>
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<groupId>org.slf4j</groupId>
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@ -128,17 +123,6 @@
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<version>${slf4j.version}</version>
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<scope>runtime</scope>
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</dependency>
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<dependency>
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<groupId>org.slf4j</groupId>
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<artifactId>slf4j-log4j12</artifactId>
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<version>${slf4j.version}</version>
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<scope>runtime</scope>
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</dependency>
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<dependency>
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<groupId>log4j</groupId>
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<artifactId>log4j</artifactId>
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<version>1.2.16</version>
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</dependency>
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<!-- Test Dependencies -->
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<dependency>
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@ -157,7 +141,7 @@
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<plugin>
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<groupId>org.apache.maven.plugins</groupId>
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<artifactId>maven-compiler-plugin</artifactId>
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<version>2.3.2</version>
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<version>3.5.1</version>
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<configuration>
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<source>${java.version}</source>
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<target>${java.version}</target>
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@ -168,16 +152,16 @@
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<!-- QueryDSL plugin -->
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<plugin>
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<groupId>com.mysema.maven</groupId>
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<artifactId>maven-apt-plugin</artifactId>
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<version>1.0.3</version>
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<artifactId>apt-maven-plugin</artifactId>
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<version>1.1.3</version>
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<executions>
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<execution>
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<goals>
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<goal>process</goal>
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</goals>
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<configuration>
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<outputDirectory>target/metamodel</outputDirectory>
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<processor>com.mysema.query.apt.jpa.JPAAnnotationProcessor</processor>
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<outputDirectory>target/generated-sources/java</outputDirectory>
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<processor>com.querydsl.apt.jpa.JPAAnnotationProcessor</processor>
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</configuration>
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</execution>
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</executions>
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@ -10,8 +10,8 @@ import org.baeldung.entity.Person;
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import org.baeldung.entity.QPerson;
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import org.springframework.stereotype.Repository;
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import com.mysema.query.group.GroupBy;
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import com.mysema.query.jpa.impl.JPAQuery;
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import com.querydsl.core.group.GroupBy;
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import com.querydsl.jpa.impl.JPAQuery;
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@Repository
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public class PersonDaoImpl implements PersonDao {
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@ -27,39 +27,39 @@ public class PersonDaoImpl implements PersonDao {
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@Override
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public List<Person> findPersonsByFirstnameQueryDSL(final String firstname) {
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final JPAQuery query = new JPAQuery(em);
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final JPAQuery<Person> query = new JPAQuery<>(em);
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final QPerson person = QPerson.person;
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return query.from(person).where(person.firstname.eq(firstname)).list(person);
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return query.from(person).where(person.firstname.eq(firstname)).fetch();
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}
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@Override
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public List<Person> findPersonsByFirstnameAndSurnameQueryDSL(final String firstname, final String surname) {
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final JPAQuery query = new JPAQuery(em);
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final JPAQuery<Person> query = new JPAQuery<>(em);
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final QPerson person = QPerson.person;
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return query.from(person).where(person.firstname.eq(firstname).and(person.surname.eq(surname))).list(person);
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return query.from(person).where(person.firstname.eq(firstname).and(person.surname.eq(surname))).fetch();
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}
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@Override
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public List<Person> findPersonsByFirstnameInDescendingOrderQueryDSL(final String firstname) {
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final JPAQuery query = new JPAQuery(em);
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final JPAQuery<Person> query = new JPAQuery<>(em);
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final QPerson person = QPerson.person;
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return query.from(person).where(person.firstname.eq(firstname)).orderBy(person.surname.desc()).list(person);
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return query.from(person).where(person.firstname.eq(firstname)).orderBy(person.surname.desc()).fetch();
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}
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@Override
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public int findMaxAge() {
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final JPAQuery query = new JPAQuery(em);
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final JPAQuery<Person> query = new JPAQuery<>(em);
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final QPerson person = QPerson.person;
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return query.from(person).list(person.age.max()).get(0);
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return query.from(person).select(person.age.max()).fetchFirst();
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}
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@Override
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public Map<String, Integer> findMaxAgeByName() {
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final JPAQuery query = new JPAQuery(em);
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final JPAQuery<Person> query = new JPAQuery<>(em);
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final QPerson person = QPerson.person;
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return query.from(person).transform(GroupBy.groupBy(person.firstname).as(GroupBy.max(person.age)));
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@ -0,0 +1,56 @@
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/*
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* (c) Центр ИТ, 2016. Все права защищены.
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*/
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package org.baeldung.querydsl.intro.entities;
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import javax.persistence.Entity;
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import javax.persistence.GeneratedValue;
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import javax.persistence.Id;
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import javax.persistence.ManyToOne;
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@Entity
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public class BlogPost {
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@Id
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@GeneratedValue
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private Long id;
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private String title;
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private String body;
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@ManyToOne
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private User user;
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public Long getId() {
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return id;
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}
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public void setId(Long id) {
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this.id = id;
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}
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public String getTitle() {
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return title;
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}
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public void setTitle(String code) {
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this.title = code;
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}
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public String getBody() {
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return body;
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}
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public void setBody(String body) {
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this.body = body;
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}
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public User getUser() {
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return user;
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}
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public void setUser(User user) {
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this.user = user;
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}
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}
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@ -0,0 +1,55 @@
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/*
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* (c) Центр ИТ, 2016. Все права защищены.
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*/
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package org.baeldung.querydsl.intro.entities;
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import java.util.HashSet;
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import java.util.Set;
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import javax.persistence.*;
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@Entity
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public class User {
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@Id
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@GeneratedValue
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private Long id;
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private String login;
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private Boolean disabled;
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@OneToMany(cascade = CascadeType.PERSIST, mappedBy = "user")
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private Set<BlogPost> blogPosts = new HashSet<>(0);
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public Long getId() {
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return id;
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}
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public void setId(Long id) {
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this.id = id;
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}
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public String getLogin() {
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return login;
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}
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public void setLogin(String name) {
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this.login = name;
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}
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public Set<BlogPost> getBlogPosts() {
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return blogPosts;
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}
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public void setBlogPosts(Set<BlogPost> blogPosts) {
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this.blogPosts = blogPosts;
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}
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public Boolean getDisabled() {
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return disabled;
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}
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public void setDisabled(Boolean disabled) {
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this.disabled = disabled;
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}
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}
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@ -16,4 +16,17 @@
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</properties>
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</persistence-unit>
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<!-- PersistenceUnit for Intro to QueryDSL -->
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<persistence-unit name="org.baeldung.querydsl.intro">
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<provider>org.hibernate.jpa.HibernatePersistenceProvider</provider>
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<properties>
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<property name="hibernate.connection.driver_class" value="org.hsqldb.jdbcDriver"/>
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<property name="hibernate.connection.url" value="jdbc:hsqldb:mem:test"/>
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<property name="hibernate.connection.username" value="sa"/>
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<property name="hibernate.connection.password" value=""/>
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<property name="hibernate.hbm2ddl.auto" value="update"/>
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<property name="hibernate.dialect" value="org.hibernate.dialect.HSQLDialect" />
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</properties>
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</persistence-unit>
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</persistence>
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@ -1,12 +1,9 @@
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<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE log4j:configuration SYSTEM "log4j.dtd" >
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<log4j:configuration xmlns:log4j="http://jakarta.apache.org/log4j/">
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<configuration>
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<!-- Appenders -->
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<appender name="console" class="org.apache.log4j.ConsoleAppender">
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<param name="Target" value="System.out" />
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<layout class="org.apache.log4j.PatternLayout">
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<param name="ConversionPattern" value="%d{yyyy-MM-dd HH:mm:ss} [%t] %-5p: %c - %m%n" />
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<appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
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<layout class="ch.qos.logback.classic.PatternLayout">
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<Pattern>%d{yyyy-MM-dd HH:mm:ss} [%t] %-5p: %c - %m%n</Pattern>
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</layout>
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</appender>
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@ -33,10 +30,8 @@
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<level value="warn" />
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</logger>
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<!-- Root Logger -->
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<root>
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<priority value="warn" />
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<appender-ref ref="console" />
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<root level="warn">
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<appender-ref ref="STDOUT"/>
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</root>
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</log4j:configuration>
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</configuration>
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@ -0,0 +1,215 @@
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/*
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* (c) Центр ИТ, 2016. Все права защищены.
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*/
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package org.baeldung.querydsl.intro;
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import java.util.List;
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import javax.persistence.EntityManager;
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import javax.persistence.EntityManagerFactory;
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import javax.persistence.Persistence;
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import org.baeldung.querydsl.intro.entities.BlogPost;
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import org.baeldung.querydsl.intro.entities.QBlogPost;
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import org.baeldung.querydsl.intro.entities.QUser;
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import org.baeldung.querydsl.intro.entities.User;
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import com.querydsl.core.Tuple;
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import com.querydsl.core.types.dsl.Expressions;
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import com.querydsl.core.types.dsl.NumberPath;
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import com.querydsl.jpa.JPAExpressions;
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import com.querydsl.jpa.impl.JPAQueryFactory;
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import org.junit.*;
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import static org.junit.Assert.*;
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public class QueryDSLTest {
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private static EntityManagerFactory emf;
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private EntityManager em;
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private JPAQueryFactory queryFactory;
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@BeforeClass
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public static void populateDatabase() {
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emf = Persistence.createEntityManagerFactory("org.baeldung.querydsl.intro");
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EntityManager em = emf.createEntityManager();
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em.getTransaction().begin();
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User user1 = new User();
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user1.setLogin("David");
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em.persist(user1);
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User user2 = new User();
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user2.setLogin("Ash");
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em.persist(user2);
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User user3 = new User();
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user3.setLogin("Call");
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em.persist(user3);
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User user4 = new User();
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user4.setLogin("Bishop");
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em.persist(user4);
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BlogPost blogPost1 = new BlogPost();
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blogPost1.setTitle("Hello World!");
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blogPost1.setUser(user1);
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em.persist(blogPost1);
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BlogPost blogPost2 = new BlogPost();
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blogPost2.setTitle("My Second Post");
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blogPost2.setUser(user1);
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em.persist(blogPost2);
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BlogPost blogPost3 = new BlogPost();
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blogPost3.setTitle("Hello World!");
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blogPost3.setUser(user3);
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em.persist(blogPost3);
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em.getTransaction().commit();
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em.close();
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}
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@Before
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public void setUp() {
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em = emf.createEntityManager();
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em.getTransaction().begin();
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queryFactory = new JPAQueryFactory(em);
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}
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@Test
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public void whenFindByLogin_thenShouldReturnUser() {
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QUser user = QUser.user;
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User aUser = queryFactory.selectFrom(user)
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.where(user.login.eq("David"))
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.fetchOne();
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assertNotNull(aUser);
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assertEquals(aUser.getLogin(), "David");
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}
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@Test
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public void whenUsingOrderBy_thenResultsShouldBeOrdered() {
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QUser user = QUser.user;
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List<User> users = queryFactory.selectFrom(user)
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.orderBy(user.login.asc())
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.fetch();
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assertEquals(users.size(), 4);
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assertEquals(users.get(0).getLogin(), "Ash");
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assertEquals(users.get(1).getLogin(), "Bishop");
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assertEquals(users.get(2).getLogin(), "Call");
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assertEquals(users.get(3).getLogin(), "David");
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}
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@Test
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public void whenGroupingByTitle_thenReturnsTuples() {
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QBlogPost blogPost = QBlogPost.blogPost;
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NumberPath<Long> count = Expressions.numberPath(Long.class, "c");
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List<Tuple> userTitleCounts = queryFactory.select(blogPost.title, blogPost.id.count().as(count))
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.from(blogPost)
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.groupBy(blogPost.title)
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.orderBy(count.desc())
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.fetch();
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assertEquals("Hello World!", userTitleCounts.get(0).get(blogPost.title));
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assertEquals(new Long(2), userTitleCounts.get(0).get(count));
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assertEquals("My Second Post", userTitleCounts.get(1).get(blogPost.title));
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assertEquals(new Long(1), userTitleCounts.get(1).get(count));
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}
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@Test
|
||||
public void whenJoiningWithCondition_thenResultCountShouldMatch() {
|
||||
|
||||
QUser user = QUser.user;
|
||||
QBlogPost blogPost = QBlogPost.blogPost;
|
||||
|
||||
List<User> users = queryFactory.selectFrom(user)
|
||||
.innerJoin(user.blogPosts, blogPost)
|
||||
.on(blogPost.title.eq("Hello World!"))
|
||||
.fetch();
|
||||
|
||||
assertEquals(2, users.size());
|
||||
}
|
||||
|
||||
@Test
|
||||
public void whenRefiningWithSubquery_thenResultCountShouldMatch() {
|
||||
|
||||
QUser user = QUser.user;
|
||||
QBlogPost blogPost = QBlogPost.blogPost;
|
||||
|
||||
List<User> users = queryFactory.selectFrom(user)
|
||||
.where(user.id.in(
|
||||
JPAExpressions.select(blogPost.user.id)
|
||||
.from(blogPost)
|
||||
.where(blogPost.title.eq("Hello World!"))))
|
||||
.fetch();
|
||||
|
||||
assertEquals(2, users.size());
|
||||
}
|
||||
|
||||
@Test
|
||||
public void whenUpdating_thenTheRecordShouldChange() {
|
||||
|
||||
QUser user = QUser.user;
|
||||
|
||||
queryFactory.update(user)
|
||||
.where(user.login.eq("Ash"))
|
||||
.set(user.login, "Ash2")
|
||||
.set(user.disabled, true)
|
||||
.execute();
|
||||
|
||||
em.getTransaction().commit();
|
||||
|
||||
em.getTransaction().begin();
|
||||
|
||||
assertEquals(Boolean.TRUE,
|
||||
queryFactory.select(user.disabled)
|
||||
.from(user)
|
||||
.where(user.login.eq("Ash2"))
|
||||
.fetchOne());
|
||||
|
||||
}
|
||||
|
||||
@Test
|
||||
public void whenDeleting_thenTheRecordShouldBeAbsent() {
|
||||
|
||||
QUser user = QUser.user;
|
||||
|
||||
queryFactory.delete(user)
|
||||
.where(user.login.eq("Bishop"))
|
||||
.execute();
|
||||
|
||||
em.getTransaction().commit();
|
||||
|
||||
em.getTransaction().begin();
|
||||
|
||||
assertNull(queryFactory.selectFrom(user)
|
||||
.where(user.login.eq("Bishop"))
|
||||
.fetchOne());
|
||||
|
||||
}
|
||||
|
||||
@After
|
||||
public void tearDown() {
|
||||
em.getTransaction().commit();
|
||||
em.close();
|
||||
}
|
||||
|
||||
@AfterClass
|
||||
public static void afterClass() {
|
||||
emf.close();
|
||||
}
|
||||
|
||||
}
|
||||
Loading…
Reference in New Issue