/*
* 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.slf4j.Logger;
import org.slf4j.LoggerFactory;
import javax.jcr.Node;
import javax.jcr.RepositoryException;
import javax.jcr.Session;
import javax.jcr.Value;
/**
* Performs a test with n sessions concurrently performing non-conflicting
* modifications on the <i>same</i> node.
* <p>
* See http://issues.apache.org/jira/browse/JCR-584.
*/
public class ConcurrentNodeModificationTest extends AbstractJCRTest {
/**
* Logger instance.
*/
private static final Logger log =
LoggerFactory.getLogger(ConcurrentNodeModificationTest.class);
private static final int NUM_SESSIONS = 100;
private static final int NUM_ITERATIONS = 10;
private static final int NUM_NODES = 10;
private volatile boolean success;
/**
* Runs the test.
*/
public void testConcurrentNodeModificationSessions() throws Exception {
success = true;
Thread[] threads = new Thread[NUM_SESSIONS];
for (int i = 0; i < threads.length; i++) {
TestSession ts = new TestSession("s" + i);
threads[i] = new Thread(ts, "CNMT " + i);
}
for (Thread thread : threads) {
thread.start();
}
for (Thread thread : threads) {
thread.join();
}
assertTrue("Unexpected exceptions during test, see the log file for details", success);
}
//--------------------------------------------------------< inner classes >
class TestSession implements Runnable {
private final Session session;
private final String identity;
TestSession(String identity) throws RepositoryException {
this.session = getHelper().getSuperuserSession();
this.identity = identity;
}
public void run() {
log.debug("started.");
try {
for (int i = 0; success && i < NUM_ITERATIONS; i++) {
runIteration();
}
} catch (Exception e) {
log.error("Operation failed", e);
success = false;
} finally {
session.logout();
}
log.info("ended.");
}
private void runIteration() throws RepositoryException {
Node n = session.getRootNode().getNode(testPath);
String propName = "prop_" + identity;
log.info("setting property {}", propName);
n.setProperty(propName, "Hello World!");
Thread.yield(); // maximize chances of interference
session.save();
log.info("removing property {}", propName);
n.setProperty(propName, (Value) null);
Thread.yield(); // maximize chances of interference
session.save();
for (int i = 0; i < NUM_NODES; i++) {
String name = "x_" + identity + "_" + i;
log.info("adding subnode {}", name);
//Node n1 = n.addNode("x" + i, "nt:unstructured");
Node n1 = n.addNode(name, "nt:unstructured");
n1.setProperty("testprop", "xxx");
Thread.yield(); // maximize chances of interference
session.save();
}
for (int i = 0; i < NUM_NODES; i++) {
String name = "x_" + identity + "_" + i;
log.info("removing subnode {}", name);
n.getNode(name).remove();
Thread.yield(); // maximize chances of interference
session.save();
}
}
}
}