/**
* 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.utils;
import org.apache.zookeeper.
ClientCnxn;
import org.apache.zookeeper.
WatchedEvent;
import org.apache.zookeeper.
Watcher;
import org.apache.zookeeper.
ZooKeeper;
import java.lang.reflect.
Field;
import java.lang.reflect.
Method;
// reflective version of zooKeeper.getTestable().injectSessionExpiration();
@
SuppressWarnings("JavaReflectionMemberAccess")
public class
InjectSessionExpiration
{
private static final
Field cnxnField;
private static final
Field stateField;
private static final
Field eventThreadField;
private static final
Field sendThreadField;
private static final
Method queueEventMethod;
private static final
Method queueEventOfDeathMethod;
private static final
Method getClientCnxnSocketMethod;
private static final
Method wakeupCnxnMethod;
static
{
Field localCnxnField;
Field localStateField;
Field localEventThreadField;
Field localSendThreadField;
Method localQueueEventMethod;
Method localEventOfDeathMethod;
Method localGetClientCnxnSocketMethod;
Method localWakeupCnxnMethod;
try
{
Class<?>
eventThreadClass =
Class.
forName("org.apache.zookeeper.ClientCnxn$EventThread");
Class<?>
sendThreadClass =
Class.
forName("org.apache.zookeeper.ClientCnxn$SendThread");
Class<?>
clientCnxnSocketClass =
Class.
forName("org.apache.zookeeper.ClientCnxnSocket");
localCnxnField =
ZooKeeper.class.
getDeclaredField("cnxn");
localCnxnField.
setAccessible(true);
localStateField =
ClientCnxn.class.
getDeclaredField("state");
localStateField.
setAccessible(true);
localEventThreadField =
ClientCnxn.class.
getDeclaredField("eventThread");
localEventThreadField.
setAccessible(true);
localSendThreadField =
ClientCnxn.class.
getDeclaredField("sendThread");
localSendThreadField.
setAccessible(true);
localQueueEventMethod =
eventThreadClass.
getDeclaredMethod("queueEvent",
WatchedEvent.class);
localQueueEventMethod.
setAccessible(true);
localEventOfDeathMethod =
eventThreadClass.
getDeclaredMethod("queueEventOfDeath");
localEventOfDeathMethod.
setAccessible(true);
localGetClientCnxnSocketMethod =
sendThreadClass.
getDeclaredMethod("getClientCnxnSocket");
localGetClientCnxnSocketMethod.
setAccessible(true);
localWakeupCnxnMethod =
clientCnxnSocketClass.
getDeclaredMethod("wakeupCnxn");
localWakeupCnxnMethod.
setAccessible(true);
}
catch (
ReflectiveOperationException e )
{
throw new
RuntimeException("Could not access internal ZooKeeper fields",
e);
}
cnxnField =
localCnxnField;
stateField =
localStateField;
eventThreadField =
localEventThreadField;
sendThreadField =
localSendThreadField;
queueEventMethod =
localQueueEventMethod;
queueEventOfDeathMethod =
localEventOfDeathMethod;
getClientCnxnSocketMethod =
localGetClientCnxnSocketMethod;
wakeupCnxnMethod =
localWakeupCnxnMethod;
}
public static void
injectSessionExpiration(
ZooKeeper zooKeeper)
{
try
{
WatchedEvent event = new
WatchedEvent(
Watcher.
Event.
EventType.
None,
Watcher.
Event.
KeeperState.
Expired, null);
ClientCnxn clientCnxn = (
ClientCnxn)
cnxnField.
get(
zooKeeper);
Object eventThread =
eventThreadField.
get(
clientCnxn);
queueEventMethod.
invoke(
eventThread,
event);
queueEventOfDeathMethod.
invoke(
eventThread);
stateField.
set(
clientCnxn,
ZooKeeper.
States.
CLOSED);
Object sendThread =
sendThreadField.
get(
clientCnxn);
Object clientCnxnSocket =
getClientCnxnSocketMethod.
invoke(
sendThread);
wakeupCnxnMethod.
invoke(
clientCnxnSocket);
}
catch (
ReflectiveOperationException e )
{
throw new
RuntimeException("Could not inject session expiration using reflection",
e);
}
}
}