Page Speed Optimization Libraries  1.3.25.1
net/instaweb/util/public/split_writer.h
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00001 /*
00002  * Copyright 2010 Google Inc.
00003  *
00004  * Licensed under the Apache License, Version 2.0 (the "License");
00005  * you may not use this file except in compliance with the License.
00006  * You may obtain a copy of the License at
00007  *
00008  *      http:///www.apache.org/licenses/LICENSE-2.0
00009  *
00010  * Unless required by applicable law or agreed to in writing, software
00011  * distributed under the License is distributed on an "AS IS" BASIS,
00012  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
00013  * See the License for the specific language governing permissions and
00014  * limitations under the License.
00015  */
00016 
00018 
00019 #ifndef NET_INSTAWEB_UTIL_PUBLIC_SPLIT_WRITER_H_
00020 #define NET_INSTAWEB_UTIL_PUBLIC_SPLIT_WRITER_H_
00021 
00022 #include "net/instaweb/util/public/basictypes.h"
00023 #include "net/instaweb/util/public/string_util.h"
00024 #include "net/instaweb/util/public/writer.h"
00025 
00026 namespace net_instaweb {
00027 
00028 class MessageHandler;
00029 
00031 class SplitWriter : public Writer {
00032  public:
00033   SplitWriter(Writer* sub_writer1, Writer* sub_writer2)
00034       : writer1_(sub_writer1), writer2_(sub_writer2) {
00035   }
00036 
00037   virtual ~SplitWriter();
00038 
00039   virtual bool Write(const StringPiece& str, MessageHandler* handler) {
00040     bool ret = writer1_->Write(str, handler);
00041     ret &= writer2_->Write(str, handler);
00042     return ret;
00043   }
00044 
00045   virtual bool Flush(MessageHandler* handler) {
00046     bool ret = writer1_->Flush(handler);
00047     ret &= writer2_->Flush(handler);
00048     return ret;
00049   }
00050 
00051  private:
00052   Writer* writer1_;
00053   Writer* writer2_;
00054 
00055   DISALLOW_COPY_AND_ASSIGN(SplitWriter);
00056 };
00057 
00058 }  
00059 
00060 #endif  ///< NET_INSTAWEB_UTIL_PUBLIC_SPLIT_WRITER_H_
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