mirror of
https://github.com/mongodb/mongo.git
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132 lines
3.4 KiB
C++
132 lines
3.4 KiB
C++
// bridge.cpp
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/**
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* Copyright (C) 2008 10gen Inc.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License, version 3,
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* as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "stdafx.h"
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#include "../util/message.h"
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#include "../client/dbclient.h"
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using namespace mongo;
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using namespace std;
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int port = 0;
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string destUri;
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class Forwarder {
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public:
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Forwarder( MessagingPort &mp ) : mp_( mp ) {
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}
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void operator()() const {
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DBClientConnection dest;
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string errmsg;
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while( !dest.connect( destUri, errmsg ) )
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sleepmillis( 500 );
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Message m;
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while( 1 ) {
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m.reset();
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if ( !mp_.recv( m ) ) {
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cout << "end connection " << mp_.farEnd.toString() << endl;
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mp_.shutdown();
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break;
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}
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int oldId = m.data->id;
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if ( m.data->operation() == dbQuery || m.data->operation() == dbMsg || m.data->operation() == dbGetMore ) {
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Message response;
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dest.port().call( m, response );
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mp_.reply( m, response, oldId );
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} else {
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dest.port().say( m, oldId );
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}
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}
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}
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private:
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MessagingPort &mp_;
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};
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set<MessagingPort*> ports;
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class MyListener : public Listener {
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public:
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MyListener( int port ) : Listener( "", port ) {}
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virtual void accepted(MessagingPort *mp) {
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ports.insert( mp );
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Forwarder f( *mp );
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boost::thread t( f );
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}
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};
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auto_ptr< MyListener > listener;
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#if !defined(_WIN32)
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void cleanup( int sig ) {
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ListeningSockets::get()->closeAll();
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for ( set<MessagingPort*>::iterator i = ports.begin(); i != ports.end(); i++ )
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(*i)->shutdown();
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::exit( 0 );
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}
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void setupSignals() {
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signal( SIGINT , cleanup );
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signal( SIGTERM , cleanup );
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signal( SIGPIPE , cleanup );
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signal( SIGABRT , cleanup );
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signal( SIGSEGV , cleanup );
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signal( SIGBUS , cleanup );
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signal( SIGFPE , cleanup );
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}
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#else
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inline void setupSignals() {}
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#endif
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void helpExit() {
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cout << "usage mongobridge --port <port> --dest <destUri>" << endl;
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cout << " port: port to listen for mongo messages" << endl;
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cout << " destUri: uri of remote mongod instance" << endl;
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::exit( -1 );
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}
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void check( bool b ) {
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if ( !b )
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helpExit();
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}
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int main( int argc, char **argv ) {
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static StaticObserver staticObserver;
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setupSignals();
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check( argc == 5 );
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for( int i = 1; i < 5; ++i ) {
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check( i % 2 != 0 );
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if ( strcmp( argv[ i ], "--port" ) == 0 ) {
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port = strtol( argv[ ++i ], 0, 10 );
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} else if ( strcmp( argv[ i ], "--dest" ) == 0 ) {
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destUri = argv[ ++i ];
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} else {
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check( false );
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}
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}
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check( port != 0 && !destUri.empty() );
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listener.reset( new MyListener( port ) );
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listener->initAndListen();
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return 0;
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}
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