Imported Upstream version 1.3.1

1 files changed, 191 insertions, 0 deletions

diff --git a/util/message_server_asio.cpp b/util/message_server_asio.cpp
new file mode 100644
index 0000000..4d5fab0
--- /dev/null
+++ b/util/message_server_asio.cpp
@@ -0,0 +1,191 @@
+// message_server_asio.cpp
+
+/*    Copyright 2009 10gen Inc.
+ *
+ *    Licensed 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.
+ */
+
+#ifdef USE_ASIO
+
+#include <boost/asio.hpp>
+#include <boost/bind.hpp>
+#include <boost/enable_shared_from_this.hpp>
+#include <boost/shared_ptr.hpp>
+
+#include <iostream>
+#include <vector>
+
+#include "message.h"
+#include "message_server.h"
+#include "../util/thread_pool.h"
+
+using namespace boost;
+using namespace boost::asio;
+using namespace boost::asio::ip;
+//using namespace std;
+
+namespace mongo {
+    namespace {
+        ThreadPool tp;
+    }
+
+    class MessageServerSession : public boost::enable_shared_from_this<MessageServerSession> , public AbstractMessagingPort {
+    public:
+        MessageServerSession( MessageHandler * handler , io_service& ioservice ) : _handler( handler ) , _socket( ioservice ){
+            
+        }
+        ~MessageServerSession(){
+            cout << "disconnect from: " << _socket.remote_endpoint() << endl;
+        }
+
+        tcp::socket& socket(){
+            return _socket;
+        }
+
+        void start(){
+            cout << "MessageServerSession start from:" << _socket.remote_endpoint() << endl;
+            _startHeaderRead();
+        }
+        
+        void handleReadHeader( const boost::system::error_code& error ){
+            if ( _inHeader.len == 0 )
+                return;
+
+            if ( ! _inHeader.valid() ){
+                cout << "  got invalid header from: " << _socket.remote_endpoint() << " closing connected" << endl;
+                return;
+            }
+            
+            char * raw = (char*)malloc( _inHeader.len );
+            
+            MsgData * data = (MsgData*)raw;
+            memcpy( data , &_inHeader , sizeof( _inHeader ) );
+            assert( data->len == _inHeader.len );
+            
+            uassert( 10273 ,  "_cur not empty! pipelining requests not supported" , ! _cur.data );
+
+            _cur.setData( data , true );
+            async_read( _socket ,
+                        buffer( raw + sizeof( _inHeader ) , _inHeader.len - sizeof( _inHeader ) ) ,
+                        boost::bind( &MessageServerSession::handleReadBody , shared_from_this() , boost::asio::placeholders::error ) );
+        }
+        
+        void handleReadBody( const boost::system::error_code& error ){
+            tp.schedule(&MessageServerSession::process, shared_from_this());
+        }
+
+        void process(){
+            _handler->process( _cur , this );
+
+            if (_reply.data){
+                async_write( _socket ,
+                             buffer( (char*)_reply.data , _reply.data->len ) ,
+                             boost::bind( &MessageServerSession::handleWriteDone , shared_from_this() , boost::asio::placeholders::error ) );
+            } else {
+                _cur.reset();
+                _startHeaderRead();
+            }
+        }
+        
+        void handleWriteDone( const boost::system::error_code& error ){
+            _cur.reset();
+            _reply.reset();
+            _startHeaderRead();
+        }
+        
+        virtual void reply( Message& received, Message& response ){
+            reply( received , response , received.data->id );
+        }
+        
+        virtual void reply( Message& query , Message& toSend, MSGID responseTo ){
+            _reply = toSend;
+
+            _reply.data->id = nextMessageId();
+            _reply.data->responseTo = responseTo;
+            uassert( 10274 ,  "pipelining requests doesn't work yet" , query.data->id == _cur.data->id );
+        }
+
+        
+        virtual unsigned remotePort(){
+            return _socket.remote_endpoint().port();
+        }
+        
+    private:        
+        
+        void _startHeaderRead(){
+            _inHeader.len = 0;
+            async_read( _socket , 
+                        buffer( &_inHeader , sizeof( _inHeader ) ) ,
+                        boost::bind( &MessageServerSession::handleReadHeader , shared_from_this() , boost::asio::placeholders::error ) );
+        }
+        
+        MessageHandler * _handler;
+        tcp::socket _socket;
+        MsgData _inHeader;
+        Message _cur;
+        Message _reply;
+    };
+    
+
+    class AsyncMessageServer : public MessageServer {
+    public:
+        AsyncMessageServer( int port , MessageHandler * handler )
+            : MessageServer( port , handler )
+            , _endpoint( tcp::v4() , port )
+            , _acceptor( _ioservice , _endpoint )
+        {
+            _accept();
+        }
+        virtual ~AsyncMessageServer(){
+            
+        }
+
+        void run(){
+            cout << "AsyncMessageServer starting to listen on: " << _port << endl;
+            _ioservice.run();
+            cout << "AsyncMessageServer done listening on: " << _port << endl;
+        }
+        
+        void handleAccept( shared_ptr<MessageServerSession> session , 
+                           const boost::system::error_code& error ){
+            if ( error ){
+                cout << "handleAccept error!" << endl;
+                return;
+            }
+            session->start();
+            _accept();
+        }
+        
+        void _accept(){
+            shared_ptr<MessageServerSession> session( new MessageServerSession( _handler , _ioservice ) );
+            _acceptor.async_accept( session->socket() ,
+                boost::bind( &AsyncMessageServer::handleAccept,
+                                          this, 
+                                          session,
+                                          boost::asio::placeholders::error )
+                                    );            
+        }
+
+    private:
+        io_service _ioservice;
+        tcp::endpoint _endpoint;
+        tcp::acceptor _acceptor;
+    };
+
+    MessageServer * createServer( int port , MessageHandler * handler ){
+        return new AsyncMessageServer( port , handler );
+    }    
+
+}
+
+#endif