hadoop AutoRefreshNoHARMFailoverProxyProvider 源码
haddop AutoRefreshNoHARMFailoverProxyProvider 代码
文件路径：/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/client/AutoRefreshNoHARMFailoverProxyProvider.java
/**
* 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
* <p>
* http://www.apache.org/licenses/LICENSE-2.0
* <p>
* 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.hadoop.yarn.client;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.classification.InterfaceStability;
import org.apache.hadoop.ipc.RPC;
import org.apache.hadoop.yarn.conf.YarnConfiguration;
import java.io.IOException;
import java.net.InetSocketAddress;
/**
* A subclass of {@link RMFailoverProxyProvider} which tries to
* resolve the proxy DNS in the event of failover.
* This provider doesn't support HA or Federation.
*/
@InterfaceAudience.Private
@InterfaceStability.Unstable
public class AutoRefreshNoHARMFailoverProxyProvider<T>
extends DefaultNoHARMFailoverProxyProvider<T> {
private static final Logger LOG =
LoggerFactory.getLogger(AutoRefreshNoHARMFailoverProxyProvider.class);
protected RMProxy<T> rmProxy;
protected YarnConfiguration conf;
@Override
public void init(Configuration configuration, RMProxy<T> rmProxy,
Class<T> protocol) {
this.rmProxy = rmProxy;
this.protocol = protocol;
this.conf = new YarnConfiguration(configuration);
}
@Override
public synchronized ProxyInfo<T> getProxy() {
if (proxy == null) {
proxy = getProxyInternal();
}
return new ProxyInfo<T>(proxy, null);
}
protected T getProxyInternal() {
try {
final InetSocketAddress rmAddress = rmProxy.getRMAddress(conf, protocol);
return rmProxy.getProxy(conf, protocol, rmAddress);
} catch (IOException ioe) {
LOG.error("Unable to create proxy to the ResourceManager",
ioe.getMessage());
return null;
}
}
/**
* Stop the current proxy when performFailover.
* @param currentProxy
*/
@Override
public synchronized void performFailover(T currentProxy) {
RPC.stopProxy(proxy);
proxy = null;
}
}
相关信息
相关文章
hadoop AutoRefreshRMFailoverProxyProvider 源码
hadoop ConfiguredRMFailoverProxyProvider 源码
hadoop DefaultNoHARMFailoverProxyProvider 源码
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