com.hazelcast.client.ClientOutOfMemoryHandler Maven / Gradle / Ivy
/*
* Copyright (c) 2008-2015, Hazelcast, Inc. All Rights Reserved.
*
* Licensed 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 com.hazelcast.client;
import com.hazelcast.client.connection.ClientConnectionManager;
import com.hazelcast.client.impl.HazelcastClientInstanceImpl;
import com.hazelcast.core.HazelcastInstance;
import com.hazelcast.instance.DefaultOutOfMemoryHandler;
import com.hazelcast.util.EmptyStatement;
/**
* To clear resources of the client upon OutOfMemory
*/
public class ClientOutOfMemoryHandler extends DefaultOutOfMemoryHandler {
@Override
public void onOutOfMemory(OutOfMemoryError oome, HazelcastInstance[] hazelcastInstances) {
for (HazelcastInstance instance : hazelcastInstances) {
if (instance instanceof HazelcastClientInstanceImpl) {
ClientHelper.cleanResources((HazelcastClientInstanceImpl) instance);
}
}
try {
oome.printStackTrace(System.err);
} catch (Throwable ignored) {
EmptyStatement.ignore(ignored);
}
}
private static final class ClientHelper {
private ClientHelper() {
}
public static void cleanResources(HazelcastClientInstanceImpl client) {
closeSockets(client);
tryStopThreads(client);
tryShutdown(client);
}
private static void closeSockets(HazelcastClientInstanceImpl client) {
final ClientConnectionManager connectionManager = client.getConnectionManager();
if (connectionManager != null) {
try {
connectionManager.shutdown();
} catch (Throwable ignored) {
EmptyStatement.ignore(ignored);
}
}
}
private static void tryShutdown(HazelcastClientInstanceImpl client) {
if (client == null) {
return;
}
try {
client.doShutdown();
} catch (Throwable ignored) {
EmptyStatement.ignore(ignored);
}
}
public static void tryStopThreads(HazelcastClientInstanceImpl client) {
if (client == null) {
return;
}
try {
client.getThreadGroup().interrupt();
} catch (Throwable ignored) {
EmptyStatement.ignore(ignored);
}
}
}
}