/*
* 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 java.util.ConcurrentModificationException;
import javax.jcr.InvalidItemStateException;
import javax.jcr.ItemNotFoundException;
import javax.jcr.Node;
import javax.jcr.NodeIterator;
import javax.jcr.RepositoryException;
import javax.jcr.Session;
import org.apache.jackrabbit.core.state.NoSuchItemStateException;
import org.apache.jackrabbit.test.AbstractJCRTest;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class NPEandCMETest extends AbstractJCRTest {
/** Logger instance */
private static final Logger log =
LoggerFactory.getLogger(NPEandCMETest.class);
private final static int NUM_THREADS = 10;
private final static boolean SHOW_STACKTRACE = true;
protected void setUp() throws Exception {
super.setUp();
Session session = getHelper().getSuperuserSession();
session.getRootNode().addNode("test");
session.save();
}
protected void tearDown() throws Exception {
try {
Session session = getHelper().getSuperuserSession();
if (session.getRootNode().hasNode("test")) {
session.getRootNode().getNode("test").remove();
session.save();
}
} finally {
super.tearDown();
}
}
public void testDo() throws Exception {
Thread[] threads = new Thread[NUM_THREADS];
TestTask[] tasks = new TestTask[NUM_THREADS];
for (int i = 0; i < NUM_THREADS; i++) {
Session session = getHelper().getSuperuserSession();
tasks[i] = new TestTask(i, session);
}
for (int i = 0; i < NUM_THREADS; i++) {
threads[i] = new Thread(tasks[i]);
threads[i].start();
}
for (int i = 0; i < NUM_THREADS; i++) {
threads[i].join();
}
int npes = 0, cmes = 0;
for(int i = 0; i < NUM_THREADS; i++) {
npes += tasks[i].npes;
cmes += tasks[i].cmes;
}
assertEquals("Total NPEs > 0", 0, npes);
assertEquals("Total CMEs > 0", 0, cmes);
}
private static class TestTask implements Runnable {
private final Session session;
private final int id;
private final Node test;
private int npes = 0;
private int cmes = 0;
private TestTask(int id, Session session) throws RepositoryException {
this.id = id;
this.session = session;
test = this.session.getRootNode().getNode("test");
}
public void run() {
try {
for (int i = 0; i < 500; i++) {
NodeIterator nodes = test.getNodes();
if (nodes.getSize() > 100) {
long count = nodes.getSize() - 100;
while (nodes.hasNext() && count-- > 0) {
Node node = nodes.nextNode();
if (node != null) {
try {
node.remove();
}
catch (ItemNotFoundException e) {
// item was already removed
}
catch (InvalidItemStateException e) {
// ignorable
}
}
}
session.save();
}
test.addNode("test-" + id + "-" + i);
session.save();
}
}
catch (InvalidItemStateException e) {
// ignorable
}
catch (RepositoryException e) {
Throwable cause = e.getCause();
if (!(cause instanceof NoSuchItemStateException)) {
log.warn("Unexpected RepositoryException caught", e);
}
// else ignorable
}
catch (NullPointerException e) {
log.error("NPE caught", e);
npes++;
}
catch (ConcurrentModificationException e) {
log.error("CME caught", e);
cmes++;
}
}
}
}