/**
* 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.curator.test;
import org.apache.zookeeper.server.ServerCnxnFactory;
import org.apache.zookeeper.server.ServerConfig;
import org.apache.zookeeper.server.ZKDatabase;
import org.apache.zookeeper.server.ZooKeeperServer;
import org.apache.zookeeper.server.ZooKeeperServerMain;
import org.apache.zookeeper.server.quorum.QuorumPeerConfig;
import java.io.IOException;
import java.lang.reflect.Field;
import java.nio.channels.ServerSocketChannel;
import java.util.concurrent.CountDownLatch;
public class TestingZooKeeperMain extends ZooKeeperServerMain implements ZooKeeperMainFace
{
private final CountDownLatch latch = new CountDownLatch(1);
private static final int MAX_WAIT_MS = 1000;
@Override
public void kill()
{
try
{
Field cnxnFactoryField = ZooKeeperServerMain.class.getDeclaredField("cnxnFactory");
cnxnFactoryField.setAccessible(true);
ServerCnxnFactory cnxnFactory = (ServerCnxnFactory)cnxnFactoryField.get(this);
cnxnFactory.closeAll();
Field ssField = cnxnFactory.getClass().getDeclaredField("ss");
ssField.setAccessible(true);
ServerSocketChannel ss = (ServerSocketChannel)ssField.get(cnxnFactory);
ss.close();
close();
}
catch ( Exception e )
{
e.printStackTrace(); // just ignore - this class is only for testing
}
}
@Override
public void runFromConfig(QuorumPeerConfig config) throws Exception
{
ServerConfig serverConfig = new ServerConfig();
serverConfig.readFrom(config);
latch.countDown();
super.runFromConfig(serverConfig);
}
@SuppressWarnings("SynchronizationOnLocalVariableOrMethodParameter")
@Override
public void blockUntilStarted() throws Exception
{
latch.await();
ServerCnxnFactory cnxnFactory = getServerConnectionFactory();
if ( cnxnFactory != null )
{
final ZooKeeperServer zkServer = getZooKeeperServer(cnxnFactory);
if ( zkServer != null )
{
synchronized ( zkServer )
{
if ( !zkServer.isRunning() )
{
zkServer.wait();
}
}
}
}
}
@Override
public void close() throws IOException
{
shutdown();
try
{
ServerCnxnFactory cnxnFactory = getServerConnectionFactory();
if ( cnxnFactory != null )
{
ZooKeeperServer zkServer = getZooKeeperServer(cnxnFactory);
if ( zkServer != null )
{
ZKDatabase zkDb = zkServer.getZKDatabase();
if ( zkDb != null )
{
// make ZK server close its log files
zkDb.close();
}
}
}
}
catch ( Exception e )
{
e.printStackTrace(); // just ignore - this class is only for testing
}
}
private ServerCnxnFactory getServerConnectionFactory() throws Exception
{
Field cnxnFactoryField = ZooKeeperServerMain.class.getDeclaredField("cnxnFactory");
cnxnFactoryField.setAccessible(true);
ServerCnxnFactory cnxnFactory;
// Wait until the cnxnFactory field is non-null or up to 1s, whichever comes first.
long startTime = System.currentTimeMillis();
do
{
cnxnFactory = (ServerCnxnFactory)cnxnFactoryField.get(this);
}
while ( (cnxnFactory == null) && ((System.currentTimeMillis() - startTime) < MAX_WAIT_MS) );
return cnxnFactory;
}
private ZooKeeperServer getZooKeeperServer(ServerCnxnFactory cnxnFactory) throws Exception
{
Field zkServerField = ServerCnxnFactory.class.getDeclaredField("zkServer");
zkServerField.setAccessible(true);
ZooKeeperServer zkServer;
// Wait until the zkServer field is non-null or up to 1s, whichever comes first.
long startTime = System.currentTimeMillis();
do
{
zkServer = (ZooKeeperServer)zkServerField.get(cnxnFactory);
}
while ( (zkServer == null) && ((System.currentTimeMillis() - startTime) < MAX_WAIT_MS) );
return zkServer;
}
}