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Guide to JDO (#1736)

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* Guide to JDO

* Guide to JDO

* Guide to JDO

* Guide To JDO
This commit is contained in:
Jesus Boadas 2017-04-26 15:30:04 -04:00 committed by maibin
parent e29b8394e0
commit bf02497b7c
2 changed files with 93 additions and 14 deletions
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76
core-java/src/main/java/com/baeldung/jdo/GuideToJDO.java
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@ -1,33 +1,55 @@
package com.baeldung.jdo; package com.baeldung.jdo;
import java.util.Collection;
import java.util.Iterator; import java.util.Iterator;
import java.util.List; import java.util.List;
import java.util.Random; import java.util.Random;
import java.util.logging.Level; import java.util.logging.Level;
import java.util.logging.Logger; import java.util.logging.Logger;
import javax.jdo.JDOHelper;
import javax.jdo.PersistenceManager; import javax.jdo.PersistenceManager;
import javax.jdo.PersistenceManagerFactory; import javax.jdo.PersistenceManagerFactory;
import javax.jdo.Query; import javax.jdo.Query;
import javax.jdo.Transaction; import javax.jdo.Transaction;
import org.datanucleus.api.jdo.JDOPersistenceManagerFactory;
import org.datanucleus.metadata.PersistenceUnitMetaData;
public class GuideToJDO { public class GuideToJDO {
private static final Logger LOGGER = Logger.getLogger(GuideToJDO.class.getName()); private static final Logger LOGGER = Logger.getLogger(GuideToJDO.class.getName());
private Random rnd = new Random(); private Random rnd = new Random();
private PersistenceUnitMetaData pumd;
public static void main(String[] args) { public static void main(String[] args) {
new GuideToJDO(); new GuideToJDO();
} }
public GuideToJDO() { public GuideToJDO() {
CreateProperties();
CreateProducts(); CreateProducts();
ListProducts(); ListProducts();
UpdateProducts();
ListProducts();
DeleteProducts();
ListProducts();
}
public void CreateProperties(){
pumd = new PersistenceUnitMetaData("dynamic-unit", "RESOURCE_LOCAL", null);
pumd.addClassName("com.baeldung.jdo.Product");
pumd.setExcludeUnlistedClasses();
pumd.addProperty("javax.jdo.option.ConnectionDriverName", "org.h2.Driver");
pumd.addProperty("javax.jdo.option.ConnectionURL", "jdbc:h2:mem:mypersistence");
pumd.addProperty("javax.jdo.option.ConnectionUserName", "sa");
pumd.addProperty("javax.jdo.option.ConnectionPassword", "");
pumd.addProperty("datanucleus.autoCreateSchema", "true");
} }
public void CreateProducts() { public void CreateProducts() {
PersistenceManagerFactory pmf = JDOHelper.getPersistenceManagerFactory("Tutorial"); PersistenceManagerFactory pmf = new JDOPersistenceManagerFactory(pumd, null);
PersistenceManager pm = pmf.getPersistenceManager(); PersistenceManager pm = pmf.getPersistenceManager();
Transaction tx = pm.currentTransaction(); Transaction tx = pm.currentTransaction();
try { try {
@ -51,26 +73,64 @@ public class GuideToJDO {
} }
pm.close(); pm.close();
} }
} }
@SuppressWarnings("unchecked") @SuppressWarnings("rawtypes")
public void UpdateProducts(){
PersistenceManagerFactory pmf = new JDOPersistenceManagerFactory(pumd, null);
PersistenceManager pm = pmf.getPersistenceManager();
Transaction tx = pm.currentTransaction();
try {
tx.begin();
Query query = pm.newQuery(Product.class, "name == \"Phone\"");
Collection result = (Collection) query.execute();
Product product = (Product) result.iterator().next();
product.setName("Android Phone");
tx.commit();
} finally {
if (tx.isActive()) {
tx.rollback();
}
pm.close();
}
}
@SuppressWarnings("rawtypes")
public void DeleteProducts(){
PersistenceManagerFactory pmf = new JDOPersistenceManagerFactory(pumd, null);
PersistenceManager pm = pmf.getPersistenceManager();
Transaction tx = pm.currentTransaction();
try {
tx.begin();
Query query = pm.newQuery(Product.class, "name == \"Android Phone\"");
Collection result = (Collection) query.execute();
Product product = (Product) result.iterator().next();
pm.deletePersistent(product);
tx.commit();
} finally {
if (tx.isActive()) {
tx.rollback();
}
pm.close();
}
}
@SuppressWarnings({ "rawtypes", "unchecked" })
public void ListProducts() { public void ListProducts() {
PersistenceManagerFactory pmf = JDOHelper.getPersistenceManagerFactory("Tutorial"); PersistenceManagerFactory pmf = new JDOPersistenceManagerFactory(pumd, null);
PersistenceManager pm = pmf.getPersistenceManager(); PersistenceManager pm = pmf.getPersistenceManager();
Transaction tx = pm.currentTransaction(); Transaction tx = pm.currentTransaction();
try { try {
tx.begin(); tx.begin();
@SuppressWarnings("rawtypes") Query q = pm.newQuery("SELECT FROM " + Product.class.getName() + " WHERE price > 10");
Query q = pm.newQuery("SELECT FROM " + Product.class.getName() + " WHERE price < 1");
List<Product> products = (List<Product>) q.execute(); List<Product> products = (List<Product>) q.execute();
Iterator<Product> iter = products.iterator(); Iterator<Product> iter = products.iterator();
while (iter.hasNext()) { while (iter.hasNext()) {
Product p = iter.next(); Product p = iter.next();
LOGGER.log(Level.WARNING, "Product name: {0} - Price: {1}", new Object[] { p.name, p.price }); LOGGER.log(Level.WARNING, "Product name: {0} - Price: {1}", new Object[] { p.name, p.price });
} }
LOGGER.log(Level.INFO, "--------------------------------------------------------------");
tx.commit(); tx.commit();
} finally { } finally {
if (tx.isActive()) { if (tx.isActive()) {

27
core-java/src/test/java/com/baeldung/jdo/GuideToJDOTest.java
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@ -6,18 +6,28 @@ import static org.junit.Assert.fail;
import java.util.Iterator; import java.util.Iterator;
import java.util.List; import java.util.List;
import javax.jdo.JDOHelper;
import javax.jdo.PersistenceManager; import javax.jdo.PersistenceManager;
import javax.jdo.PersistenceManagerFactory; import javax.jdo.PersistenceManagerFactory;
import javax.jdo.Query; import javax.jdo.Query;
import javax.jdo.Transaction; import javax.jdo.Transaction;
import org.datanucleus.api.jdo.JDOPersistenceManagerFactory;
import org.datanucleus.metadata.PersistenceUnitMetaData;
import org.junit.Test; import org.junit.Test;
public class GuideToJDOTest { public class GuideToJDOTest {
@Test @Test
public void givenProduct_WhenNewThenPerformTransaction() { public void givenProduct_WhenNewThenPerformTransaction() {
PersistenceManagerFactory pmf = JDOHelper.getPersistenceManagerFactory("Tutorial"); PersistenceUnitMetaData pumd = new PersistenceUnitMetaData("dynamic-unit", "RESOURCE_LOCAL", null);
pumd.addClassName("com.baeldung.jdo.Product");
pumd.setExcludeUnlistedClasses();
pumd.addProperty("javax.jdo.option.ConnectionDriverName", "org.h2.Driver");
pumd.addProperty("javax.jdo.option.ConnectionURL", "jdbc:h2:mem:mypersistence");
pumd.addProperty("javax.jdo.option.ConnectionUserName", "sa");
pumd.addProperty("javax.jdo.option.ConnectionPassword", "");
pumd.addProperty("datanucleus.autoCreateSchema", "true");
PersistenceManagerFactory pmf = new JDOPersistenceManagerFactory(pumd, null);
PersistenceManager pm = pmf.getPersistenceManager(); PersistenceManager pm = pmf.getPersistenceManager();
Transaction tx = pm.currentTransaction(); Transaction tx = pm.currentTransaction();
try { try {
@ -43,7 +53,16 @@ public class GuideToJDOTest {
@Test @Test
public void givenProduct_WhenQueryThenExist() { public void givenProduct_WhenQueryThenExist() {
PersistenceManagerFactory pmf = JDOHelper.getPersistenceManagerFactory("Tutorial"); PersistenceUnitMetaData pumd = new PersistenceUnitMetaData("dynamic-unit", "RESOURCE_LOCAL", null);
pumd.addClassName("com.baeldung.jdo.Product");
pumd.setExcludeUnlistedClasses();
pumd.addProperty("javax.jdo.option.ConnectionDriverName", "org.h2.Driver");
pumd.addProperty("javax.jdo.option.ConnectionURL", "jdbc:h2:mem:mypersistence");
pumd.addProperty("javax.jdo.option.ConnectionUserName", "sa");
pumd.addProperty("javax.jdo.option.ConnectionPassword", "");
pumd.addProperty("datanucleus.autoCreateSchema", "true");
PersistenceManagerFactory pmf = new JDOPersistenceManagerFactory(pumd, null);
PersistenceManager pm = pmf.getPersistenceManager(); PersistenceManager pm = pmf.getPersistenceManager();
Transaction tx = pm.currentTransaction(); Transaction tx = pm.currentTransaction();
try { try {
@ -66,7 +85,7 @@ public class GuideToJDOTest {
pmf.close(); pmf.close();
PersistenceManagerFactory pmf2 = JDOHelper.getPersistenceManagerFactory("Tutorial"); PersistenceManagerFactory pmf2 = new JDOPersistenceManagerFactory(pumd, null);
PersistenceManager pm2 = pmf2.getPersistenceManager(); PersistenceManager pm2 = pmf2.getPersistenceManager();
Transaction tx2 = pm2.currentTransaction(); Transaction tx2 = pm2.currentTransaction();
try { try {