/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.jackrabbit.core;
import org.apache.jackrabbit.test.AbstractJCRTest;
import org.apache.jackrabbit.util.Locked;
import javax.jcr.RepositoryException;
import javax.jcr.Session;
import javax.jcr.Node;
import javax.jcr.Property;
import java.util.List;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.Random;
/**
* <code>LockTest</code> tests the utility {@link org.apache.jackrabbit.util.Locked}.
*/
public class LockTest extends AbstractJCRTest {
private static final int NUM_THREADS = 100;
private static final int NUM_CHANGES = 10;
private static final int NUM_VALUE_GETS = 10;
/**
* Tests the utility {@link org.apache.jackrabbit.util.Locked} by
* implementing running multiple threads concurrently that apply changes
* to a lockable node.
*/
public void testLockUtility() throws RepositoryException {
final Node lockable = testRootNode.addNode(nodeName1);
lockable.addMixin(mixLockable);
testRootNode.save();
final List worker = new ArrayList();
for (int i = 0; i < NUM_THREADS; i++) {
worker.add(new Thread() {
private final int threadNumber = worker.size();
public void run() {
Session s;
try {
s = helper.getSuperuserSession();
} catch (RepositoryException e) {
return;
}
try {
for (int i = 0; i < NUM_CHANGES; i++) {
Node n = (Node) s.getItem(lockable.getPath());
new Locked() {
protected Object run(Node n) throws RepositoryException {
String nodeName = "node" + threadNumber;
if (n.hasNode(nodeName)) {
n.getNode(nodeName).remove();
} else {
n.addNode(nodeName);
}
n.save();
System.out.println("Thread" + threadNumber + ": saved modification");
return null;
}
}.with(n, false);
// do a random wait
Thread.sleep(new Random().nextInt(100));
}
} catch (RepositoryException e) {
System.out.println("exception while running code with lock:" + e.getMessage());
} catch (InterruptedException e) {
System.out.println(Thread.currentThread() + " interrupted while waiting for lock");
} finally {
s.logout();
}
}
});
}
for (Iterator it = worker.iterator(); it.hasNext(); ) {
((Thread) it.next()).start();
}
for (Iterator it = worker.iterator(); it.hasNext(); ) {
try {
((Thread) it.next()).join();
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
/**
* Tests the utility {@link org.apache.jackrabbit.util.Locked} by
* implementing a persistent counter.
*/
public void testSequence() throws RepositoryException {
final Node counter = testRootNode.addNode(nodeName1);
counter.setProperty("value", 0);
counter.addMixin(mixLockable);
testRootNode.save();
final List worker = new ArrayList();
for (int i = 0; i < NUM_THREADS; i++) {
worker.add(new Thread() {
private final int threadNumber = worker.size();
public void run() {
Session s;
try {
s = helper.getSuperuserSession();
} catch (RepositoryException e) {
return;
}
try {
for (int i = 0; i < NUM_VALUE_GETS; i++) {
Node n = (Node) s.getItem(counter.getPath());
long currentValue = ((Long) new Locked() {
protected Object run(Node n) throws RepositoryException {
Property seqProp = n.getProperty("value");
long value = seqProp.getLong();
seqProp.setValue(++value);
seqProp.save();
return new Long(value);
}
}.with(n, false)).longValue();
System.out.println("Thread" + threadNumber + ": got sequence number: " + currentValue);
// do a random wait
Thread.sleep(new Random().nextInt(100));
}
} catch (RepositoryException e) {
System.out.println("exception while running code with lock:" + e.getMessage());
} catch (InterruptedException e) {
System.out.println(Thread.currentThread() + " interrupted while waiting for lock");
} finally {
s.logout();
}
}
});
}
for (Iterator it = worker.iterator(); it.hasNext(); ) {
((Thread) it.next()).start();
}
for (Iterator it = worker.iterator(); it.hasNext(); ) {
try {
((Thread) it.next()).join();
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
/**
* Tests the utility {@link org.apache.jackrabbit.util.Locked} by
* implementing a persistent counter with a timeout when the next value of
* the counter is retrieved. The number of values that can be retrieved by
* this test depends on system performance and the configured persistence
* manager.
*/
public void testSequenceWithTimeout() throws RepositoryException {
final Node counter = testRootNode.addNode(nodeName1);
counter.setProperty("value", 0);
counter.addMixin(mixLockable);
testRootNode.save();
final List worker = new ArrayList();
for (int i = 0; i < NUM_THREADS; i++) {
worker.add(new Thread() {
private final int threadNumber = worker.size();
public void run() {
Session s;
try {
s = helper.getSuperuserSession();
} catch (RepositoryException e) {
return;
}
try {
for (int i = 0; i < NUM_VALUE_GETS; i++) {
Node n = (Node) s.getItem(counter.getPath());
Object ret = new Locked() {
protected Object run(Node n) throws RepositoryException {
Property seqProp = n.getProperty("value");
long value = seqProp.getLong();
seqProp.setValue(++value);
seqProp.save();
return new Long(value);
}
}.with(n, false, 10 * 1000); // expect a value after ten seconds
if (ret == Locked.TIMED_OUT) {
System.out.println("Thread" + threadNumber + ": could not get a sequence number within 10 seconds");
} else {
long currentValue = ((Long) ret).longValue();
System.out.println("Thread" + threadNumber + ": got sequence number: " + currentValue);
}
// do a random wait
Thread.sleep(new Random().nextInt(100));
}
} catch (RepositoryException e) {
System.out.println("exception while running code with lock:" + e.getMessage());
} catch (InterruptedException e) {
System.out.println(Thread.currentThread() + " interrupted while waiting for lock");
} finally {
s.logout();
}
}
});
}
for (Iterator it = worker.iterator(); it.hasNext(); ) {
((Thread) it.next()).start();
}
for (Iterator it = worker.iterator(); it.hasNext(); ) {
try {
((Thread) it.next()).join();
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
}