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/**
* 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.factories.impl.pb;
import java.io.Closeable;
import java.lang.reflect.Constructor;
import java.lang.reflect.InvocationHandler;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Proxy;
import java.net.InetSocketAddress;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.HadoopIllegalArgumentException;
import org.apache.hadoop.classification.InterfaceAudience.Private;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.yarn.exceptions.YarnRuntimeException;
import org.apache.hadoop.yarn.factories.RpcClientFactory;
@Private
public class RpcClientFactoryPBImpl implements RpcClientFactory {
private static final Log LOG = LogFactory
.getLog(RpcClientFactoryPBImpl.class);
private static final String PB_IMPL_PACKAGE_SUFFIX = "impl.pb.client";
private static final String PB_IMPL_CLASS_SUFFIX = "PBClientImpl";
private static final RpcClientFactoryPBImpl self = new RpcClientFactoryPBImpl();
private ConcurrentMap<Class<?>, Constructor<?>> cache = new ConcurrentHashMap<Class<?>, Constructor<?>>();
public static RpcClientFactoryPBImpl get() {
return RpcClientFactoryPBImpl.self;
}
private RpcClientFactoryPBImpl() {
}
public Object getClient(Class<?> protocol, long clientVersion,
InetSocketAddress addr, Configuration conf) {
Constructor<?> constructor = cache.get(protocol);
if (constructor == null) {
Class<?> pbClazz = null;
try {
pbClazz = conf.getClassByName(getPBImplClassName(protocol));
} catch (ClassNotFoundException e) {
throw new YarnRuntimeException("Failed to load class: ["
+ getPBImplClassName(protocol) + "]", e);
}
try {
constructor = pbClazz.getConstructor(Long.TYPE, InetSocketAddress.class, Configuration.class);
constructor.setAccessible(true);
cache.putIfAbsent(protocol, constructor);
} catch (NoSuchMethodException e) {
throw new YarnRuntimeException("Could not find constructor with params: " + Long.TYPE + ", " + InetSocketAddress.class + ", " + Configuration.class, e);
}
}
try {
Object retObject = constructor.newInstance(clientVersion, addr, conf);
return retObject;
} catch (InvocationTargetException e) {
throw new YarnRuntimeException(e);
} catch (IllegalAccessException e) {
throw new YarnRuntimeException(e);
} catch (InstantiationException e) {
throw new YarnRuntimeException(e);
}
}
@Override
public void stopClient(Object proxy) {
try {
if (proxy instanceof Closeable) {
((Closeable) proxy).close();
return;
} else {
InvocationHandler handler = Proxy.getInvocationHandler(proxy);
if (handler instanceof Closeable) {
((Closeable) handler).close();
return;
}
}
} catch (Exception e) {
LOG.error("Cannot call close method due to Exception. " + "Ignoring.", e);
throw new YarnRuntimeException(e);
}
throw new HadoopIllegalArgumentException(
"Cannot close proxy - is not Closeable or "
+ "does not provide closeable invocation handler " + proxy.getClass());
}
private String getPBImplClassName(Class<?> clazz) {
String srcPackagePart = getPackageName(clazz);
String srcClassName = getClassName(clazz);
String destPackagePart = srcPackagePart + "." + PB_IMPL_PACKAGE_SUFFIX;
String destClassPart = srcClassName + PB_IMPL_CLASS_SUFFIX;
return destPackagePart + "." + destClassPart;
}
private String getClassName(Class<?> clazz) {
String fqName = clazz.getName();
return (fqName.substring(fqName.lastIndexOf(".") + 1, fqName.length()));
}
private String getPackageName(Class<?> clazz) {
return clazz.getPackage().getName();
}
}