/**
* 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.mapreduce.v2.hs;
import java.io.IOException;
import java.net.InetSocketAddress;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.classification.InterfaceAudience.Private;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.ipc.ProtobufRpcEngine;
import org.apache.hadoop.ipc.RPC;
import org.apache.hadoop.mapreduce.v2.hs.protocol.HSAdminRefreshProtocol;
import org.apache.hadoop.mapreduce.v2.hs.protocolPB.HSAdminRefreshProtocolClientSideTranslatorPB;
import org.apache.hadoop.mapreduce.v2.hs.protocolPB.HSAdminRefreshProtocolPB;
import org.apache.hadoop.net.NetUtils;
import org.apache.hadoop.security.RefreshUserMappingsProtocol;
import org.apache.hadoop.security.UserGroupInformation;
import org.apache.hadoop.security.protocolPB.RefreshUserMappingsProtocolClientSideTranslatorPB;
import org.apache.hadoop.security.protocolPB.RefreshUserMappingsProtocolPB;
import org.apache.hadoop.tools.GetUserMappingsProtocol;
import org.apache.hadoop.tools.protocolPB.GetUserMappingsProtocolClientSideTranslatorPB;
import org.apache.hadoop.tools.protocolPB.GetUserMappingsProtocolPB;
@Private
public class HSProxies {
private static final Log LOG = LogFactory.getLog(HSProxies.class);
@SuppressWarnings("unchecked")
public static <T> T createProxy(Configuration conf, InetSocketAddress hsaddr,
Class<T> xface, UserGroupInformation ugi) throws IOException {
T proxy;
if (xface == RefreshUserMappingsProtocol.class) {
proxy = (T) createHSProxyWithRefreshUserMappingsProtocol(hsaddr, conf,
ugi);
} else if (xface == GetUserMappingsProtocol.class) {
proxy = (T) createHSProxyWithGetUserMappingsProtocol(hsaddr, conf, ugi);
} else if (xface == HSAdminRefreshProtocol.class) {
proxy = (T) createHSProxyWithHSAdminRefreshProtocol(hsaddr, conf, ugi);
} else {
String message = "Unsupported protocol found when creating the proxy "
+ "connection to History server: "
+ ((xface != null) ? xface.getClass().getName() : "null");
LOG.error(message);
throw new IllegalStateException(message);
}
return proxy;
}
private static RefreshUserMappingsProtocol createHSProxyWithRefreshUserMappingsProtocol(
InetSocketAddress address, Configuration conf, UserGroupInformation ugi)
throws IOException {
RefreshUserMappingsProtocolPB proxy = (RefreshUserMappingsProtocolPB) createHSProxy(
address, conf, ugi, RefreshUserMappingsProtocolPB.class, 0);
return new RefreshUserMappingsProtocolClientSideTranslatorPB(proxy);
}
private static GetUserMappingsProtocol createHSProxyWithGetUserMappingsProtocol(
InetSocketAddress address, Configuration conf, UserGroupInformation ugi)
throws IOException {
GetUserMappingsProtocolPB proxy = (GetUserMappingsProtocolPB) createHSProxy(
address, conf, ugi, GetUserMappingsProtocolPB.class, 0);
return new GetUserMappingsProtocolClientSideTranslatorPB(proxy);
}
private static HSAdminRefreshProtocol createHSProxyWithHSAdminRefreshProtocol(
InetSocketAddress hsaddr, Configuration conf, UserGroupInformation ugi)
throws IOException {
HSAdminRefreshProtocolPB proxy = (HSAdminRefreshProtocolPB) createHSProxy(
hsaddr, conf, ugi, HSAdminRefreshProtocolPB.class, 0);
return new HSAdminRefreshProtocolClientSideTranslatorPB(proxy);
}
private static Object createHSProxy(InetSocketAddress address,
Configuration conf, UserGroupInformation ugi, Class<?> xface,
int rpcTimeout) throws IOException {
RPC.setProtocolEngine(conf, xface, ProtobufRpcEngine.class);
Object proxy = RPC.getProxy(xface, RPC.getProtocolVersion(xface), address,
ugi, conf, NetUtils.getDefaultSocketFactory(conf), rpcTimeout);
return proxy;
}
}