| /******************************************************************** |
| * 2014 - |
| * open source under Apache License Version 2.0 |
| ********************************************************************/ |
| /** |
| * 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_CLIENT_OUTPUTSTREAMINTER_H_ |
| #define _HDFS_LIBHDFS3_CLIENT_OUTPUTSTREAMINTER_H_ |
| |
| #include "ExceptionInternal.h" |
| #include "FileSystemInter.h" |
| #include "Memory.h" |
| #include "Permission.h" |
| |
| namespace Hdfs { |
| namespace Internal { |
| |
| /** |
| * A output stream used to write data to hdfs. |
| */ |
| class OutputStreamInter { |
| public: |
| virtual ~OutputStreamInter() { |
| } |
| |
| /** |
| * To create or append a file. |
| * @param fs hdfs file system. |
| * @param path the file path. |
| * @param flag creation flag, can be Create, Append or Create|Overwrite. |
| * @param permission create a new file with given permission. |
| * @param createParent if the parent does not exist, create it. |
| * @param replication create a file with given number of replication. |
| * @param blockSize create a file with given block size. |
| */ |
| virtual void open(shared_ptr<FileSystemInter> fs, const char * path, int flag, |
| const Permission & permission, bool createParent, int replication, |
| int64_t blockSize) = 0; |
| |
| /** |
| * To append data to file. |
| * @param buf the data used to append. |
| * @param size the data size. |
| */ |
| virtual void append(const char * buf, int64_t size) = 0; |
| |
| /** |
| * Flush all data in buffer and waiting for ack. |
| * Will block until get all acks. |
| */ |
| virtual void flush() = 0; |
| |
| /** |
| * return the current file length. |
| * @return current file length. |
| */ |
| virtual int64_t tell() = 0; |
| |
| /** |
| * @ref OutputStream::sync |
| */ |
| virtual void sync() = 0; |
| |
| /** |
| * close the stream. |
| */ |
| virtual void close() = 0; |
| |
| virtual std::string toString() = 0; |
| |
| virtual void setError(const exception_ptr & error) = 0; |
| }; |
| |
| } |
| } |
| |
| #endif /* _HDFS_LIBHDFS3_CLIENT_OUTPUTSTREAMINTER_H_ */ |