| /** |
| * 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.ha; |
| |
| import java.io.IOException; |
| import java.net.InetSocketAddress; |
| |
| import org.apache.hadoop.classification.InterfaceAudience; |
| import org.apache.hadoop.classification.InterfaceStability; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.fs.CommonConfigurationKeys; |
| import org.apache.hadoop.ha.proto.ZKFCProtocolProtos.ZKFCProtocolService; |
| import org.apache.hadoop.ha.protocolPB.ZKFCProtocolPB; |
| import org.apache.hadoop.ha.protocolPB.ZKFCProtocolServerSideTranslatorPB; |
| import org.apache.hadoop.ipc.ProtobufRpcEngine; |
| import org.apache.hadoop.ipc.RPC; |
| import org.apache.hadoop.ipc.RPC.Server; |
| import org.apache.hadoop.security.AccessControlException; |
| import org.apache.hadoop.security.authorize.PolicyProvider; |
| |
| import com.google.protobuf.BlockingService; |
| |
| @InterfaceAudience.LimitedPrivate("HDFS") |
| @InterfaceStability.Evolving |
| public class ZKFCRpcServer implements ZKFCProtocol { |
| |
| private static final int HANDLER_COUNT = 3; |
| private final ZKFailoverController zkfc; |
| private Server server; |
| |
| ZKFCRpcServer(Configuration conf, |
| InetSocketAddress bindAddr, |
| ZKFailoverController zkfc, |
| PolicyProvider policy) throws IOException { |
| this.zkfc = zkfc; |
| |
| RPC.setProtocolEngine(conf, ZKFCProtocolPB.class, |
| ProtobufRpcEngine.class); |
| ZKFCProtocolServerSideTranslatorPB translator = |
| new ZKFCProtocolServerSideTranslatorPB(this); |
| BlockingService service = ZKFCProtocolService |
| .newReflectiveBlockingService(translator); |
| this.server = RPC.getServer( |
| ZKFCProtocolPB.class, |
| service, bindAddr.getHostName(), |
| bindAddr.getPort(), HANDLER_COUNT, false, conf, |
| null /*secretManager*/); |
| |
| // set service-level authorization security policy |
| if (conf.getBoolean( |
| CommonConfigurationKeys.HADOOP_SECURITY_AUTHORIZATION, false)) { |
| server.refreshServiceAcl(conf, policy); |
| } |
| |
| } |
| |
| void start() { |
| this.server.start(); |
| } |
| |
| public InetSocketAddress getAddress() { |
| return server.getListenerAddress(); |
| } |
| |
| void stopAndJoin() throws InterruptedException { |
| this.server.stop(); |
| this.server.join(); |
| } |
| |
| @Override |
| public void cedeActive(int millisToCede) throws IOException, |
| AccessControlException { |
| zkfc.checkRpcAdminAccess(); |
| zkfc.cedeActive(millisToCede); |
| } |
| |
| @Override |
| public void gracefulFailover() throws IOException, AccessControlException { |
| zkfc.checkRpcAdminAccess(); |
| zkfc.gracefulFailoverToYou(); |
| } |
| |
| } |