/*
* Copyright (C) 2016 eXo Platform SAS.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.exoplatform.services.jcr.api.core.query.lucene;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Random;
import java.util.concurrent.BlockingQueue;
import java.util.concurrent.LinkedBlockingQueue;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicBoolean;
import javax.jcr.Node;
import javax.jcr.NodeIterator;
import javax.jcr.RepositoryException;
import javax.jcr.Session;
import javax.jcr.query.Query;
import javax.jcr.query.QueryManager;
import org.exoplatform.services.jcr.api.core.query.AbstractIndexingTest;
/**
* @author aboughzela@exoplatform.com
*/
public class ConcurrentQueriesWithUpdatesTest extends AbstractIndexingTest
{private static final int NUM_UPDATES = 50;
private int numNodes;
@Override
protected void setUp() throws Exception {
super.setUp();
numNodes = createNodes(testRootNode, 2, 12, 0);
superuser.save();
}
public void testQueriesWithUpdates() throws Exception {
final List<Exception> exceptions = Collections.synchronizedList(new ArrayList<Exception>());
final AtomicBoolean running = new AtomicBoolean(true);
// track executed queries and do updates
final BlockingQueue<Object> queryExecuted = new LinkedBlockingQueue<Object>();
Thread queries = new Thread(new Runnable() {
public void run() {
try {
runTask(new Task() {
public void execute(Session session, Node test)
throws RepositoryException {
QueryManager qm = session.getWorkspace().getQueryManager();
while (running.get()) {
Query q = qm.createQuery(testPath + "//element(*, nt:unstructured) order by @jcr:score descending", Query.XPATH);
NodeIterator nodes = q.execute().getNodes();
assertEquals("wrong result set size", numNodes, nodes.getSize());
queryExecuted.offer(new Object());
}
}
}, 5, testRootNode.getPath());
} catch (RepositoryException e) {
exceptions.add(e);
}
}
});
queries.start();
Thread update = new Thread(new Runnable() {
public void run() {
try {
runTask(new Task() {
public void execute(Session session, Node test)
throws RepositoryException {
Random rand = new Random();
QueryManager qm = session.getWorkspace().getQueryManager();
for (int i = 0; i < NUM_UPDATES; i++) {
try {
// wait at most 10 seconds
queryExecuted.poll(10, TimeUnit.SECONDS);
} catch (InterruptedException e) {
// ignore
}
Query q = qm.createQuery(testPath + "//node" + rand.nextInt(numNodes) + " order by @jcr:score descending", Query.XPATH);
NodeIterator nodes = q.execute().getNodes();
if (nodes.hasNext()) {
Node n = nodes.nextNode();
n.setProperty("foo", "bar");
session.save();
}
}
}
}, 1, testRootNode.getPath());
} catch (RepositoryException e) {
exceptions.add(e);
}
}
});
update.start();
update.join();
running.set(false);
queries.join();
}
private int createNodes(Node n, int nodesPerLevel, int levels, int count)
throws RepositoryException {
levels--;
for (int i = 0; i < nodesPerLevel; i++) {
Node child = n.addNode("node" + count);
count++;
if (count % 1000 == 0) {
superuser.save();
}
if (levels > 0) {
count = createNodes(child, nodesPerLevel, levels, count);
}
}
return count;
}
/**
* Runs a task with the given concurrency on the node identified by path.
*
* @param task the task to run.
* @param concurrency the concurrency.
* @param path the path to the test node.
* @throws RepositoryException if an error occurs.
*/
protected void runTask(Task task, int concurrency, String path)
throws RepositoryException {
Executor[] executors = new Executor[concurrency];
for (int i = 0; i < concurrency; i++) {
Session s = testRootNode.getSession();
Node test = (Node) s.getItem(path);
s.save();
executors[i] = new Executor(s, test, task);
}
executeAll(executors);
}
/**
* Task implementations must be thread safe! Multiple threads will call
* {@link #execute(Session, Node)} concurrently.
*/
public interface Task {
public abstract void execute(Session session, Node test)
throws RepositoryException;
}
protected static class Executor implements Runnable {
protected final Session session;
protected final Node test;
protected final Task task;
protected RepositoryException exception;
public Executor(Session session, Node test, Task task) {
this.session = session;
this.test = test;
this.task = task;
}
public RepositoryException getException() {
return exception;
}
public void run() {
try {
task.execute(session, test);
} catch (RepositoryException e) {
exception = e;
} finally {
session.logout();
}
}
}
/**
* Executes all executors using individual threads.
*
* @param executors the executors.
* @throws RepositoryException if one of the executors throws an exception.
*/
private void executeAll(Executor[] executors) throws RepositoryException
{
Thread[] threads = new Thread[executors.length];
for (int i = 0; i < executors.length; i++)
{
threads[i] = new Thread(executors[i], "Executor " + i);
}
for (int i = 0; i < threads.length; i++)
{
threads[i].start();
}
}
}