001    /**
002     * Licensed to the Apache Software Foundation (ASF) under one
003     * or more contributor license agreements.  See the NOTICE file
004     * distributed with this work for additional information
005     * regarding copyright ownership.  The ASF licenses this file
006     * to you under the Apache License, Version 2.0 (the
007     * "License"); you may not use this file except in compliance
008     * with the License.  You may obtain a copy of the License at
009     *
010     *     http://www.apache.org/licenses/LICENSE-2.0
011     *
012     * Unless required by applicable law or agreed to in writing, software
013     * distributed under the License is distributed on an "AS IS" BASIS,
014     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015     * See the License for the specific language governing permissions and
016     * limitations under the License.
017     */
018    
019    package org.apache.hadoop.security.protocolPB;
020    
021    import java.io.Closeable;
022    import java.io.IOException;
023    
024    import org.apache.hadoop.ipc.ProtobufHelper;
025    import org.apache.hadoop.ipc.ProtocolMetaInterface;
026    import org.apache.hadoop.ipc.RPC;
027    import org.apache.hadoop.ipc.RpcClientUtil;
028    import org.apache.hadoop.security.RefreshUserMappingsProtocol;
029    import org.apache.hadoop.security.proto.RefreshUserMappingsProtocolProtos.RefreshSuperUserGroupsConfigurationRequestProto;
030    import org.apache.hadoop.security.proto.RefreshUserMappingsProtocolProtos.RefreshUserToGroupsMappingsRequestProto;
031    
032    import com.google.protobuf.RpcController;
033    import com.google.protobuf.ServiceException;
034    
035    public class RefreshUserMappingsProtocolClientSideTranslatorPB implements
036        ProtocolMetaInterface, RefreshUserMappingsProtocol, Closeable {
037    
038      /** RpcController is not used and hence is set to null */
039      private final static RpcController NULL_CONTROLLER = null;
040      private final RefreshUserMappingsProtocolPB rpcProxy;
041      
042      private final static RefreshUserToGroupsMappingsRequestProto 
043      VOID_REFRESH_USER_TO_GROUPS_MAPPING_REQUEST = 
044          RefreshUserToGroupsMappingsRequestProto.newBuilder().build();
045    
046      private final static RefreshSuperUserGroupsConfigurationRequestProto
047      VOID_REFRESH_SUPERUSER_GROUPS_CONFIGURATION_REQUEST = 
048          RefreshSuperUserGroupsConfigurationRequestProto.newBuilder().build();
049    
050      public RefreshUserMappingsProtocolClientSideTranslatorPB(
051          RefreshUserMappingsProtocolPB rpcProxy) {
052        this.rpcProxy = rpcProxy;
053      }
054    
055      @Override
056      public void close() throws IOException {
057        RPC.stopProxy(rpcProxy);
058      }
059    
060      @Override
061      public void refreshUserToGroupsMappings() throws IOException {
062        try {
063          rpcProxy.refreshUserToGroupsMappings(NULL_CONTROLLER,
064              VOID_REFRESH_USER_TO_GROUPS_MAPPING_REQUEST);
065        } catch (ServiceException se) {
066          throw ProtobufHelper.getRemoteException(se);
067        }
068      }
069    
070      @Override
071      public void refreshSuperUserGroupsConfiguration() throws IOException {
072        try {
073          rpcProxy.refreshSuperUserGroupsConfiguration(NULL_CONTROLLER,
074              VOID_REFRESH_SUPERUSER_GROUPS_CONFIGURATION_REQUEST);
075        } catch (ServiceException se) {
076          throw ProtobufHelper.getRemoteException(se);
077        }
078      }
079    
080      @Override
081      public boolean isMethodSupported(String methodName) throws IOException {
082        return RpcClientUtil
083            .isMethodSupported(rpcProxy, RefreshUserMappingsProtocolPB.class,
084                RPC.RpcKind.RPC_PROTOCOL_BUFFER,
085                RPC.getProtocolVersion(RefreshUserMappingsProtocolPB.class),
086                methodName);
087      }
088    }