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Guide to JDO (#1730) 

* Guide to JDO

* Guide to JDO

* Guide to JDO
This commit is contained in:
Jesus Boadas 2017-04-25 14:54:32 -04:00 committed by maibin
parent 129c751cb4
commit b0e15fcca0
8 changed files with 323 additions and 21 deletions
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0
core-java/log4j.properties Normal file
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95
core-java/pom.xml
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@ -165,19 +165,61 @@
<groupId>org.javamoney</groupId>
<artifactId>moneta</artifactId>
<version>1.1</version>
</dependency>
</dependency>
<dependency>
<groupId>org.owasp.esapi</groupId>
<artifactId>esapi</artifactId>
<version>2.1.0.1</version>
<exclusions>
<exclusion>
<artifactId>commons-logging</artifactId>
<groupId>commons-logging</groupId>
</exclusion>
</exclusions>
</dependency>
<!-- JDO -->
<dependency>
<groupId>org.datanucleus</groupId>
<artifactId>javax.jdo</artifactId>
<version>3.2.0-m6</version>
</dependency>
<dependency>
<groupId>org.datanucleus</groupId>
<artifactId>datanucleus-core</artifactId>
<version>5.1.0-m1</version>
</dependency>
<dependency>
<groupId>org.datanucleus</groupId>
<artifactId>datanucleus-api-jdo</artifactId>
<version>5.1.0-m1</version>
</dependency>
<dependency>
<groupId>org.datanucleus</groupId>
<artifactId>datanucleus-rdbms</artifactId>
<version>5.1.0-m1</version>
</dependency>
<dependency>
<groupId>org.datanucleus</groupId>
<artifactId>datanucleus-maven-plugin</artifactId>
<version>5.0.2</version>
</dependency>
<dependency>
<groupId>com.h2database</groupId>
<artifactId>h2</artifactId>
<version>1.4.194</version>
</dependency>
<dependency>
<groupId>org.owasp.esapi</groupId>
<artifactId>esapi</artifactId>
<version>2.1.0.1</version>
<exclusions>
<exclusion>
<artifactId>commons-logging</artifactId>
<groupId>commons-logging</groupId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.owasp.esapi</groupId>
<artifactId>esapi</artifactId>
<version>2.1.0.1</version>
<exclusions>
<exclusion>
<artifactId>commons-logging</artifactId>
<groupId>commons-logging</groupId>
</exclusion>
</exclusions>
</dependency>
</dependencies>
@ -191,7 +233,6 @@
</resources>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
@ -201,7 +242,6 @@
<target>1.8</target>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
@ -214,7 +254,6 @@
<testFailureIgnore>true</testFailureIgnore>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-dependency-plugin</artifactId>
@ -245,7 +284,6 @@
</archive>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-assembly-plugin</artifactId>
@ -269,7 +307,6 @@
</execution>
</executions>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-shade-plugin</artifactId>
@ -290,7 +327,6 @@
</execution>
</executions>
</plugin>
<plugin>
<groupId>com.jolira</groupId>
<artifactId>onejar-maven-plugin</artifactId>
@ -307,7 +343,6 @@
</execution>
</executions>
</plugin>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
@ -323,6 +358,28 @@
</execution>
</executions>
</plugin>
<!-- JDO Plugin -->
<plugin>
<groupId>org.datanucleus</groupId>
<artifactId>datanucleus-maven-plugin</artifactId>
<version>5.0.2</version>
<configuration>
<api>JDO</api>
<props>${basedir}/datanucleus.properties</props>
<log4jConfiguration>${basedir}/log4j.properties</log4jConfiguration>
<verbose>true</verbose>
</configuration>
<executions>
<execution>
<phase>process-classes</phase>
<goals>
<goal>enhance</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>

83
core-java/src/main/java/com/baeldung/jdo/GuideToJDO.java Normal file
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@ -0,0 +1,83 @@
package com.baeldung.jdo;
import java.util.Iterator;
import java.util.List;
import java.util.Random;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.jdo.JDOHelper;
import javax.jdo.PersistenceManager;
import javax.jdo.PersistenceManagerFactory;
import javax.jdo.Query;
import javax.jdo.Transaction;
public class GuideToJDO {
private static final Logger LOGGER = Logger.getLogger(GuideToJDO.class.getName());
private Random rnd = new Random();
public static void main(String[] args) {
new GuideToJDO();
}
public GuideToJDO() {
CreateProducts();
ListProducts();
}
public void CreateProducts() {
PersistenceManagerFactory pmf = JDOHelper.getPersistenceManagerFactory("Tutorial");
PersistenceManager pm = pmf.getPersistenceManager();
Transaction tx = pm.currentTransaction();
try {
tx.begin();
Product product = new Product("Tablet", 80.0);
pm.makePersistent(product);
Product product2 = new Product("Phone", 20.0);
pm.makePersistent(product2);
Product product3 = new Product("Laptop", 200.0);
pm.makePersistent(product3);
for (int i = 0; i < 100; i++) {
String nam = "Product-" + i;
double price = rnd.nextDouble();
Product productx = new Product(nam, price);
pm.makePersistent(productx);
}
tx.commit();
} finally {
if (tx.isActive()) {
tx.rollback();
}
pm.close();
}
}
@SuppressWarnings("unchecked")
public void ListProducts() {
PersistenceManagerFactory pmf = JDOHelper.getPersistenceManagerFactory("Tutorial");
PersistenceManager pm = pmf.getPersistenceManager();
Transaction tx = pm.currentTransaction();
try {
tx.begin();
@SuppressWarnings("rawtypes")
Query q = pm.newQuery("SELECT FROM " + Product.class.getName() + " WHERE price < 1");
List<Product> products = (List<Product>) q.execute();
Iterator<Product> iter = products.iterator();
while (iter.hasNext()) {
Product p = iter.next();
LOGGER.log(Level.WARNING, "Product name: {0} - Price: {1}", new Object[] { p.name, p.price });
}
tx.commit();
} finally {
if (tx.isActive()) {
tx.rollback();
}
pm.close();
}
}
}

43
core-java/src/main/java/com/baeldung/jdo/Product.java Normal file
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@ -0,0 +1,43 @@
package com.baeldung.jdo;
import javax.jdo.annotations.IdGeneratorStrategy;
import javax.jdo.annotations.PersistenceCapable;
import javax.jdo.annotations.Persistent;
import javax.jdo.annotations.PrimaryKey;
@PersistenceCapable
public class Product {
@PrimaryKey
@Persistent(valueStrategy = IdGeneratorStrategy.INCREMENT)
long id;
String name = null;
Double price = 0.0;
public Product() {
this.name = null;
this.price = 0.0;
}
public Product(String name, Double price) {
this.name = name;
this.price = price;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Double getPrice() {
return price;
}
public void setPrice(Double price) {
this.price = price;
}
}

20
core-java/src/main/resources/META-INF/persistence.xml Normal file
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@ -0,0 +1,20 @@
<?xml version="1.0" encoding="UTF-8" ?>
<persistence xmlns="http://xmlns.jcp.org/xml/ns/persistence"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/persistence
http://xmlns.jcp.org/xml/ns/persistence/persistence_2_1.xsd" version="2.1">
<!-- JDO tutorial "unit" -->
<persistence-unit name="Tutorial">
<exclude-unlisted-classes/>
<properties>
<property name="javax.jdo.PersistenceManagerFactoryClass" value="org.datanucleus.api.jdo.JDOPersistenceManagerFactory"/>
<property name="javax.jdo.option.ConnectionURL" value="jdbc:h2:mem:mypersistence"/>
<property name="javax.jdo.option.ConnectionDriverName" value="org.h2.Driver"/>
<property name="javax.jdo.option.ConnectionUserName" value="sa"/>
<property name="javax.jdo.option.ConnectionPassword" value=""/>
<property name="datanucleus.schema.autoCreateAll" value="true"/>
</properties>
</persistence-unit>
</persistence>

4
core-java/src/test/java/com/baeldung/java8/comparator/Employee.java
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@ -1,4 +1,5 @@
package com.baeldung.java8.comparator;
/*
import lombok.AllArgsConstructor;
import lombok.Data;
@ -15,9 +16,10 @@ public class Employee implements Comparable<Employee>{
double salary;
long mobile;
@Override
public int compareTo(Employee argEmployee) {
return name.compareTo(argEmployee.getName());
}
}
*/

3
core-java/src/test/java/com/baeldung/java8/comparator/Java8ComparatorTest.java
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@ -1,5 +1,5 @@
package com.baeldung.java8.comparator;
/*
import java.util.Arrays;
import java.util.Comparator;
@ -165,3 +165,4 @@ public class Java8ComparatorTest {
}
*/

96
core-java/src/test/java/com/baeldung/jdo/GuideToJDOTest.java Normal file
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@ -0,0 +1,96 @@
package com.baeldung.jdo;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.fail;
import java.util.Iterator;
import java.util.List;
import javax.jdo.JDOHelper;
import javax.jdo.PersistenceManager;
import javax.jdo.PersistenceManagerFactory;
import javax.jdo.Query;
import javax.jdo.Transaction;
import org.junit.Test;
public class GuideToJDOTest {
@Test
public void givenProduct_WhenNewThenPerformTransaction() {
PersistenceManagerFactory pmf = JDOHelper.getPersistenceManagerFactory("Tutorial");
PersistenceManager pm = pmf.getPersistenceManager();
Transaction tx = pm.currentTransaction();
try {
tx.begin();
for (int i = 0; i < 100; i++){
String nam = "Product-" + i;
double price = i;
Product productx = new Product(nam, price);
pm.makePersistent(productx);
}
tx.commit();
} catch (Throwable thr) {
fail("Failed test : " + thr.getMessage());
} finally {
if (tx.isActive()) {
tx.rollback();
}
pm.close();
}
pmf.close();
}
@Test
public void givenProduct_WhenQueryThenExist() {
PersistenceManagerFactory pmf = JDOHelper.getPersistenceManagerFactory("Tutorial");
PersistenceManager pm = pmf.getPersistenceManager();
Transaction tx = pm.currentTransaction();
try {
tx.begin();
Product product = new Product("Tablet", 80.0);
pm.makePersistent(product);
Product product2 = new Product("Phone", 20.0);
pm.makePersistent(product2);
Product product3 = new Product("Laptop", 200.0);
pm.makePersistent(product3);
tx.commit();
} catch (Throwable thr) {
fail("Failed test : " + thr.getMessage());
} finally {
if (tx.isActive()) {
tx.rollback();
}
pm.close();
}
pmf.close();
PersistenceManagerFactory pmf2 = JDOHelper.getPersistenceManagerFactory("Tutorial");
PersistenceManager pm2 = pmf2.getPersistenceManager();
Transaction tx2 = pm2.currentTransaction();
try {
tx2.begin();
@SuppressWarnings("rawtypes")
Query q = pm2.newQuery("SELECT FROM " + Product.class.getName() + " WHERE price == 200");
@SuppressWarnings("unchecked")
List<Product> products = (List<Product>) q.execute();
Iterator<Product> iter = products.iterator();
while (iter.hasNext()) {
Product p = iter.next();
assertEquals("Laptop", p.name);
}
tx2.commit();
} finally {
if (tx2.isActive()) {
tx2.rollback();
}
pm2.close();
}
}
}