/
BlockMasterClientPool.java
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/
BlockMasterClientPool.java
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/*
* Licensed to the University of California, Berkeley 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 tachyon.client.block;
import java.net.InetSocketAddress;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import tachyon.Constants;
import tachyon.client.BlockMasterClient;
import tachyon.client.ClientContext;
import tachyon.resource.ResourcePool;
import tachyon.util.ThreadFactoryUtils;
/**
* Class for managing block master clients. After obtaining a client with
* {@link ResourcePool#acquire}, {@link ResourcePool#release} must be called when the thread is done
* using the client.
*/
public final class BlockMasterClientPool extends ResourcePool<BlockMasterClient> {
private final ExecutorService mExecutorService;
private final InetSocketAddress mMasterAddress;
/**
* Creates a new block master client pool.
*
* @param masterAddress the master address
*/
public BlockMasterClientPool(InetSocketAddress masterAddress) {
super(ClientContext.getConf().getInt(Constants.USER_BLOCK_MASTER_CLIENT_THREADS));
mExecutorService = Executors.newFixedThreadPool(mMaxCapacity,
ThreadFactoryUtils.build("block-master-heartbeat-%d", true));
mMasterAddress = masterAddress;
}
@Override
public void close() {
// TODO(calvin): Consider collecting all the clients and shutting them down.
mExecutorService.shutdown();
}
@Override
protected BlockMasterClient createNewResource() {
return new BlockMasterClient(mMasterAddress, mExecutorService, ClientContext.getConf());
}
}