org.apache.hadoop.yarn.factory.providers.RecordFactoryProvider Maven / Gradle / Ivy
/**
* 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.LimitedPrivate;
import org.apache.hadoop.classification.InterfaceStability.Unstable;
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.RecordFactory;
@LimitedPrivate({ "MapReduce", "YARN" })
@Unstable
public class RecordFactoryProvider {
private static Configuration defaultConf;
static {
defaultConf = new Configuration();
}
private RecordFactoryProvider() {
}
public static RecordFactory getRecordFactory(Configuration conf) {
if (conf == null) {
//Assuming the default configuration has the correct factories set.
//Users can specify a particular factory by providing a configuration.
conf = defaultConf;
}
String recordFactoryClassName = conf.get(
YarnConfiguration.IPC_RECORD_FACTORY_CLASS,
YarnConfiguration.DEFAULT_IPC_RECORD_FACTORY_CLASS);
return (RecordFactory) getFactoryClassInstance(recordFactoryClassName);
}
private static Object getFactoryClassInstance(String factoryClassName) {
try {
Class clazz = Class.forName(factoryClassName);
Method method = clazz.getMethod("get", null);
method.setAccessible(true);
return method.invoke(null, null);
} catch (ClassNotFoundException e) {
throw new YarnRuntimeException(e);
} catch (NoSuchMethodException e) {
throw new YarnRuntimeException(e);
} catch (InvocationTargetException e) {
throw new YarnRuntimeException(e);
} catch (IllegalAccessException e) {
throw new YarnRuntimeException(e);
}
}
}