/**
* 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.activemq.leveldb.test;
import org.apache.activemq.Service;
import org.apache.activemq.command.ActiveMQQueue;
import org.apache.activemq.leveldb.CountDownFuture;
import org.apache.activemq.leveldb.LevelDBStore;
import org.apache.activemq.leveldb.replicated.ElectingLevelDBStore;
import org.apache.activemq.store.MessageStore;
import org.junit.Test;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.File;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.concurrent.TimeUnit;
import static org.apache.activemq.leveldb.test.ReplicationTestSupport.*;
import static org.junit.Assert.*;
/**
*/
public class ElectingLevelDBStoreTest extends ZooKeeperTestSupport {
protected static final Logger LOG = LoggerFactory.getLogger(ElectingLevelDBStoreTest.class);
@Test(timeout = 1000*60*10)
public void testElection() throws Exception {
ArrayList<ElectingLevelDBStore> stores = new ArrayList<ElectingLevelDBStore>();
ArrayList<CountDownFuture> pending_starts = new ArrayList<CountDownFuture>();
for(String dir: new String[]{"leveldb-node1", "leveldb-node2", "leveldb-node3"}) {
ElectingLevelDBStore store = createStoreNode();
store.setDirectory(new File(data_dir(), dir));
stores.add(store);
pending_starts.add(asyncStart(store));
}
// At least one of the stores should have started.
CountDownFuture f = waitFor(30 * 1000, pending_starts.toArray(new CountDownFuture[pending_starts.size()]));
assertTrue(f!=null);
pending_starts.remove(f);
// The other stores should not start..
LOG.info("Making sure the other stores don't start");
Thread.sleep(5000);
for(CountDownFuture start: pending_starts) {
assertFalse(start.completed());
}
// Make sure only of the stores is reporting to be the master.
ElectingLevelDBStore master = null;
for(ElectingLevelDBStore store: stores) {
if( store.isMaster() ) {
assertNull(master);
master = store;
}
}
assertNotNull(master);
// We can work out who the slaves are...
HashSet<ElectingLevelDBStore> slaves = new HashSet<ElectingLevelDBStore>(stores);
slaves.remove(master);
// Start sending messages to the master.
ArrayList<String> expected_list = new ArrayList<String>();
MessageStore ms = master.createQueueMessageStore(new ActiveMQQueue("TEST"));
final int TOTAL = 500;
for (int i = 0; i < TOTAL; i++) {
if (i % ((int) (TOTAL * 0.10)) == 0) {
LOG.info("" + (100 * i / TOTAL) + "% done");
}
if( i == 250 ) {
LOG.info("Checking master state");
assertEquals(expected_list, getMessages(ms));
// mid way, lets kill the master..
LOG.info("Killing Master.");
master.stop();
// At least one of the remaining stores should complete starting.
LOG.info("Waiting for slave takeover...");
f = waitFor(60 * 1000, pending_starts.toArray(new CountDownFuture[pending_starts.size()]));
assertTrue(f!=null);
pending_starts.remove(f);
// Make sure one and only one of the slaves becomes the master..
master = null;
for(ElectingLevelDBStore store: slaves) {
if( store.isMaster() ) {
assertNull(master);
master = store;
}
}
assertNotNull(master);
slaves.remove(master);
ms = master.createQueueMessageStore(new ActiveMQQueue("TEST"));
}
String msgid = "m:" + i;
addMessage(ms, msgid);
expected_list.add(msgid);
}
LOG.info("Checking master state");
assertEquals(expected_list, getMessages(ms));
master.stop();
for(ElectingLevelDBStore store: stores) {
store.stop();
}
}
@Test(timeout = 1000 * 60 * 10)
public void testZooKeeperServerFailure() throws Exception {
final ArrayList<ElectingLevelDBStore> stores = new ArrayList<ElectingLevelDBStore>();
ArrayList<CountDownFuture> pending_starts = new ArrayList<CountDownFuture>();
for (String dir : new String[]{"leveldb-node1", "leveldb-node2", "leveldb-node3"}) {
ElectingLevelDBStore store = createStoreNode();
store.setDirectory(new File(data_dir(), dir));
stores.add(store);
pending_starts.add(asyncStart(store));
}
// At least one of the stores should have started.
CountDownFuture f = waitFor(30 * 1000, pending_starts.toArray(new CountDownFuture[pending_starts.size()]));
assertTrue(f != null);
pending_starts.remove(f);
// The other stores should not start..
LOG.info("Making sure the other stores don't start");
Thread.sleep(5000);
for (CountDownFuture start : pending_starts) {
assertFalse(start.completed());
}
// Stop ZooKeeper..
LOG.info("SHUTTING DOWN ZooKeeper!");
connector.shutdown();
// None of the store should be slaves...
within( 30, TimeUnit.SECONDS, new Task(){
public void run() throws Exception {
for (ElectingLevelDBStore store : stores) {
assertFalse(store.isMaster());
}
}
});
for (ElectingLevelDBStore store : stores) {
store.stop();
}
}
private CountDownFuture asyncStart(final Service service) {
final CountDownFuture<Throwable> f = new CountDownFuture<Throwable>();
LevelDBStore.BLOCKING_EXECUTOR().execute(new Runnable() {
public void run() {
try {
service.start();
f.set(null);
} catch (Throwable e) {
e.printStackTrace();
f.set(e);
}
}
});
return f;
}
private CountDownFuture asyncStop(final Service service) {
final CountDownFuture<Throwable> f = new CountDownFuture<Throwable>();
LevelDBStore.BLOCKING_EXECUTOR().execute(new Runnable() {
public void run() {
try {
service.stop();
f.set(null);
} catch (Throwable e) {
e.printStackTrace();
f.set(e);
}
}
});
return f;
}
private ElectingLevelDBStore createStoreNode() {
ElectingLevelDBStore store = new ElectingLevelDBStore();
store.setSecurityToken("foo");
store.setLogSize(1024 * 200);
store.setReplicas(2);
store.setZkAddress("localhost:" + connector.getLocalPort());
store.setZkPath("/broker-stores");
store.setBrokerName("foo");
store.setHostname("localhost");
store.setBind("tcp://0.0.0.0:0");
return store;
}
}