hadoop RpcFactoryProvider 源码
haddop RpcFactoryProvider 代码
文件路径：/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/factory/providers/RpcFactoryProvider.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
*
* 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.hadoop.yarn.factory.providers;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.yarn.conf.YarnConfiguration;
import org.apache.hadoop.yarn.exceptions.YarnRuntimeException;
import org.apache.hadoop.yarn.factories.RpcClientFactory;
import org.apache.hadoop.yarn.factories.RpcServerFactory;
/**
* A public static get() method must be present in the Client/Server Factory implementation.
*/
@InterfaceAudience.LimitedPrivate({ "MapReduce", "YARN" })
public class RpcFactoryProvider {
private RpcFactoryProvider() {
}
public static RpcServerFactory getServerFactory(Configuration conf) {
if (conf == null) {
conf = new Configuration();
}
String serverFactoryClassName = conf.get(
YarnConfiguration.IPC_SERVER_FACTORY_CLASS,
YarnConfiguration.DEFAULT_IPC_SERVER_FACTORY_CLASS);
return (RpcServerFactory) getFactoryClassInstance(serverFactoryClassName);
}
public static RpcClientFactory getClientFactory(Configuration conf) {
String clientFactoryClassName = conf.get(
YarnConfiguration.IPC_CLIENT_FACTORY_CLASS,
YarnConfiguration.DEFAULT_IPC_CLIENT_FACTORY_CLASS);
return (RpcClientFactory) getFactoryClassInstance(clientFactoryClassName);
}
private static Object getFactoryClassInstance(String factoryClassName) {
try {
Class<?> clazz = Class.forName(factoryClassName);
Method method = clazz.getMethod("get");
method.setAccessible(true);
return method.invoke(null);
} catch (ClassNotFoundException | NoSuchMethodException |
InvocationTargetException | IllegalAccessException e) {
throw new YarnRuntimeException(e);
}
}
}
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