| /** |
| * 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. |
| */ |
| |
| #ifndef _HDFS_LIBHDFS3_RPC_RPCCLIENT_H_ |
| #define _HDFS_LIBHDFS3_RPC_RPCCLIENT_H_ |
| |
| #include "RpcAuth.h" |
| #include "RpcCall.h" |
| #include "RpcChannel.h" |
| #include "RpcChannelKey.h" |
| #include "RpcConfig.h" |
| #include "RpcProtocolInfo.h" |
| #include "RpcServerInfo.h" |
| #include "SharedPtr.h" |
| #include "Thread.h" |
| #include "UnorderedMap.h" |
| |
| #include <stdint.h> |
| #include <string> |
| #include <vector> |
| |
| #ifdef MOCK |
| #include "TestRpcChannelStub.h" |
| #endif |
| |
| namespace hdfs { |
| namespace internal { |
| |
| class RpcClient { |
| public: |
| /** |
| * Destroy an RpcClient instance. |
| */ |
| virtual ~RpcClient() { |
| } |
| |
| /** |
| * Get a RPC channel, create a new one if necessary. |
| * @param auth Authentication information used to setup RPC connection. |
| * @param protocol The RPC protocol used in this call. |
| * @param server Remote server information. |
| * @param conf RPC connection configuration. |
| * @param once If true, the RPC channel will not be reused. |
| */ |
| virtual RpcChannel &getChannel(const RpcAuth &auth, |
| const RpcProtocolInfo &protocol, |
| const RpcServerInfo &server, const RpcConfig &conf) = 0; |
| |
| /** |
| * Check the RpcClient is still running. |
| * @return true if the RpcClient is still running. |
| */ |
| virtual bool isRunning() = 0; |
| |
| virtual std::string getClientId() const = 0; |
| |
| virtual int32_t getCallId() = 0; |
| |
| public: |
| static RpcClient &getClient(); |
| static void createSinglten(); |
| |
| private: |
| static once_flag once; |
| static shared_ptr<RpcClient> client; |
| }; |
| |
| class RpcClientImpl: public RpcClient { |
| public: |
| /** |
| * Construct a RpcClient. |
| */ |
| RpcClientImpl(); |
| |
| /** |
| * Destroy an RpcClient instance. |
| */ |
| ~RpcClientImpl(); |
| |
| /** |
| * Get a RPC channel, create a new one if necessary. |
| * @param auth Authentication information used to setup RPC connection. |
| * @param protocol The RPC protocol used in this call. |
| * @param server Remote server information. |
| * @param conf RPC connection configuration. |
| * @param once If true, the RPC channel will not be reused. |
| */ |
| RpcChannel &getChannel(const RpcAuth &auth, |
| const RpcProtocolInfo &protocol, const RpcServerInfo &server, |
| const RpcConfig &conf); |
| |
| /** |
| * Close the RPC channel. |
| */ |
| void close(); |
| |
| /** |
| * Check the RpcClient is still running. |
| * @return true if the RpcClient is still running. |
| */ |
| bool isRunning(); |
| |
| std::string getClientId() const { |
| return clientId; |
| } |
| |
| int32_t getCallId() { |
| static mutex mutid; |
| lock_guard<mutex> lock(mutid); |
| ++count; |
| count = count < std::numeric_limits<int32_t>::max() ? count : 0; |
| return count; |
| } |
| |
| private: |
| shared_ptr<RpcChannel> createChannelInternal( |
| const RpcChannelKey &key); |
| |
| void clean(); |
| |
| private: |
| atomic<bool> cleaning; |
| atomic<bool> running; |
| condition_variable cond; |
| int64_t count; |
| mutex mut; |
| std::string clientId; |
| thread cleaner; |
| unordered_map<RpcChannelKey, shared_ptr<RpcChannel> > allChannels; |
| |
| #ifdef MOCK |
| private: |
| hdfs::mock::TestRpcChannelStub *stub; |
| #endif |
| }; |
| |
| } |
| } |
| |
| #endif /* _HDFS_LIBHDFS3_RPC_RPCCLIENT_H_ */ |