| /** |
| * 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.protocolPB; |
| |
| import java.io.Closeable; |
| import java.io.IOException; |
| import java.net.InetSocketAddress; |
| |
| import javax.net.SocketFactory; |
| |
| import org.apache.hadoop.classification.InterfaceAudience; |
| import org.apache.hadoop.classification.InterfaceStability; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.ha.HAServiceProtocol; |
| import org.apache.hadoop.ha.HAServiceStatus; |
| import org.apache.hadoop.ha.proto.HAServiceProtocolProtos.GetServiceStatusRequestProto; |
| import org.apache.hadoop.ha.proto.HAServiceProtocolProtos.GetServiceStatusResponseProto; |
| import org.apache.hadoop.ha.proto.HAServiceProtocolProtos.HAStateChangeRequestInfoProto; |
| import org.apache.hadoop.ha.proto.HAServiceProtocolProtos.HARequestSource; |
| import org.apache.hadoop.ha.proto.HAServiceProtocolProtos.HAServiceStateProto; |
| import org.apache.hadoop.ha.proto.HAServiceProtocolProtos.MonitorHealthRequestProto; |
| import org.apache.hadoop.ha.proto.HAServiceProtocolProtos.TransitionToActiveRequestProto; |
| import org.apache.hadoop.ha.proto.HAServiceProtocolProtos.TransitionToStandbyRequestProto; |
| import org.apache.hadoop.ha.proto.HAServiceProtocolProtos.TransitionToObserverRequestProto; |
| import org.apache.hadoop.ipc.ProtobufHelper; |
| import org.apache.hadoop.ipc.ProtobufRpcEngine; |
| import org.apache.hadoop.ipc.ProtocolTranslator; |
| import org.apache.hadoop.ipc.RPC; |
| import org.apache.hadoop.security.UserGroupInformation; |
| |
| import com.google.protobuf.RpcController; |
| import com.google.protobuf.ServiceException; |
| |
| /** |
| * This class is the client side translator to translate the requests made on |
| * {@link HAServiceProtocol} interfaces to the RPC server implementing |
| * {@link HAServiceProtocolPB}. |
| */ |
| @InterfaceAudience.Private |
| @InterfaceStability.Stable |
| public class HAServiceProtocolClientSideTranslatorPB implements |
| HAServiceProtocol, Closeable, ProtocolTranslator { |
| /** RpcController is not used and hence is set to null */ |
| private final static RpcController NULL_CONTROLLER = null; |
| private final static MonitorHealthRequestProto MONITOR_HEALTH_REQ = |
| MonitorHealthRequestProto.newBuilder().build(); |
| private final static GetServiceStatusRequestProto GET_SERVICE_STATUS_REQ = |
| GetServiceStatusRequestProto.newBuilder().build(); |
| |
| private final HAServiceProtocolPB rpcProxy; |
| |
| public HAServiceProtocolClientSideTranslatorPB(InetSocketAddress addr, |
| Configuration conf) throws IOException { |
| RPC.setProtocolEngine(conf, HAServiceProtocolPB.class, |
| ProtobufRpcEngine.class); |
| rpcProxy = RPC.getProxy(HAServiceProtocolPB.class, |
| RPC.getProtocolVersion(HAServiceProtocolPB.class), addr, conf); |
| } |
| |
| public HAServiceProtocolClientSideTranslatorPB( |
| InetSocketAddress addr, Configuration conf, |
| SocketFactory socketFactory, int timeout) throws IOException { |
| RPC.setProtocolEngine(conf, HAServiceProtocolPB.class, |
| ProtobufRpcEngine.class); |
| rpcProxy = RPC.getProxy(HAServiceProtocolPB.class, |
| RPC.getProtocolVersion(HAServiceProtocolPB.class), addr, |
| UserGroupInformation.getCurrentUser(), conf, socketFactory, timeout); |
| } |
| |
| @Override |
| public void monitorHealth() throws IOException { |
| try { |
| rpcProxy.monitorHealth(NULL_CONTROLLER, MONITOR_HEALTH_REQ); |
| } catch (ServiceException e) { |
| throw ProtobufHelper.getRemoteException(e); |
| } |
| } |
| |
| @Override |
| public void transitionToActive(StateChangeRequestInfo reqInfo) throws IOException { |
| try { |
| TransitionToActiveRequestProto req = |
| TransitionToActiveRequestProto.newBuilder() |
| .setReqInfo(convert(reqInfo)).build(); |
| |
| rpcProxy.transitionToActive(NULL_CONTROLLER, req); |
| } catch (ServiceException e) { |
| throw ProtobufHelper.getRemoteException(e); |
| } |
| } |
| |
| @Override |
| public void transitionToStandby(StateChangeRequestInfo reqInfo) throws IOException { |
| try { |
| TransitionToStandbyRequestProto req = |
| TransitionToStandbyRequestProto.newBuilder() |
| .setReqInfo(convert(reqInfo)).build(); |
| rpcProxy.transitionToStandby(NULL_CONTROLLER, req); |
| } catch (ServiceException e) { |
| throw ProtobufHelper.getRemoteException(e); |
| } |
| } |
| |
| @Override |
| public void transitionToObserver(StateChangeRequestInfo reqInfo) |
| throws IOException { |
| try { |
| TransitionToObserverRequestProto req = |
| TransitionToObserverRequestProto.newBuilder() |
| .setReqInfo(convert(reqInfo)).build(); |
| rpcProxy.transitionToObserver(NULL_CONTROLLER, req); |
| } catch (ServiceException e) { |
| throw ProtobufHelper.getRemoteException(e); |
| } |
| } |
| |
| @Override |
| public HAServiceStatus getServiceStatus() throws IOException { |
| GetServiceStatusResponseProto status; |
| try { |
| status = rpcProxy.getServiceStatus(NULL_CONTROLLER, |
| GET_SERVICE_STATUS_REQ); |
| } catch (ServiceException e) { |
| throw ProtobufHelper.getRemoteException(e); |
| } |
| |
| HAServiceStatus ret = new HAServiceStatus( |
| convert(status.getState())); |
| if (status.getReadyToBecomeActive()) { |
| ret.setReadyToBecomeActive(); |
| } else { |
| ret.setNotReadyToBecomeActive(status.getNotReadyReason()); |
| } |
| return ret; |
| } |
| |
| private HAServiceState convert(HAServiceStateProto state) { |
| switch(state) { |
| case ACTIVE: |
| return HAServiceState.ACTIVE; |
| case STANDBY: |
| return HAServiceState.STANDBY; |
| case OBSERVER: |
| return HAServiceState.OBSERVER; |
| case INITIALIZING: |
| default: |
| return HAServiceState.INITIALIZING; |
| } |
| } |
| |
| private HAStateChangeRequestInfoProto convert(StateChangeRequestInfo reqInfo) { |
| HARequestSource src; |
| switch (reqInfo.getSource()) { |
| case REQUEST_BY_USER: |
| src = HARequestSource.REQUEST_BY_USER; |
| break; |
| case REQUEST_BY_USER_FORCED: |
| src = HARequestSource.REQUEST_BY_USER_FORCED; |
| break; |
| case REQUEST_BY_ZKFC: |
| src = HARequestSource.REQUEST_BY_ZKFC; |
| break; |
| default: |
| throw new IllegalArgumentException("Bad source: " + reqInfo.getSource()); |
| } |
| return HAStateChangeRequestInfoProto.newBuilder() |
| .setReqSource(src) |
| .build(); |
| } |
| |
| |
| @Override |
| public void close() { |
| RPC.stopProxy(rpcProxy); |
| } |
| |
| @Override |
| public Object getUnderlyingProxyObject() { |
| return rpcProxy; |
| } |
| } |