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// message_server_port.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.
*/
#include "pch.h"
#ifndef USE_ASIO
#include "message.h"
#include "message_port.h"
#include "message_server.h"
#include "listen.h"
#include "../../db/cmdline.h"
#include "../../db/lasterror.h"
#include "../../db/stats/counters.h"
#ifdef __linux__ // TODO: consider making this ifndef _WIN32
# include <sys/resource.h>
#endif
namespace mongo {
namespace pms {
MessageHandler * handler;
void threadRun( MessagingPort * inPort) {
TicketHolderReleaser connTicketReleaser( &connTicketHolder );
setThreadName( "conn" );
assert( inPort );
inPort->setLogLevel(1);
scoped_ptr<MessagingPort> p( inPort );
p->postFork();
string otherSide;
Message m;
try {
LastError * le = new LastError();
lastError.reset( le ); // lastError now has ownership
otherSide = p->remoteString();
handler->connected( p.get() );
while ( ! inShutdown() ) {
m.reset();
p->clearCounters();
if ( ! p->recv(m) ) {
if( !cmdLine.quiet )
log() << "end connection " << otherSide << endl;
p->shutdown();
break;
}
handler->process( m , p.get() , le );
networkCounter.hit( p->getBytesIn() , p->getBytesOut() );
}
}
catch ( AssertionException& e ) {
log() << "AssertionException handling request, closing client connection: " << e << endl;
p->shutdown();
}
catch ( SocketException& e ) {
log() << "SocketException handling request, closing client connection: " << e << endl;
p->shutdown();
}
catch ( const ClockSkewException & ) {
log() << "ClockSkewException - shutting down" << endl;
exitCleanly( EXIT_CLOCK_SKEW );
}
catch ( const DBException& e ) { // must be right above std::exception to avoid catching subclasses
log() << "DBException handling request, closing client connection: " << e << endl;
p->shutdown();
}
catch ( std::exception &e ) {
error() << "Uncaught std::exception: " << e.what() << ", terminating" << endl;
dbexit( EXIT_UNCAUGHT );
}
catch ( ... ) {
error() << "Uncaught exception, terminating" << endl;
dbexit( EXIT_UNCAUGHT );
}
handler->disconnected( p.get() );
}
}
class PortMessageServer : public MessageServer , public Listener {
public:
PortMessageServer( const MessageServer::Options& opts, MessageHandler * handler ) :
Listener( "" , opts.ipList, opts.port ) {
uassert( 10275 , "multiple PortMessageServer not supported" , ! pms::handler );
pms::handler = handler;
}
virtual void accepted(MessagingPort * p) {
if ( ! connTicketHolder.tryAcquire() ) {
log() << "connection refused because too many open connections: " << connTicketHolder.used() << endl;
// TODO: would be nice if we notified them...
p->shutdown();
delete p;
sleepmillis(2); // otherwise we'll hard loop
return;
}
try {
#ifndef __linux__ // TODO: consider making this ifdef _WIN32
boost::thread thr( boost::bind( &pms::threadRun , p ) );
#else
pthread_attr_t attrs;
pthread_attr_init(&attrs);
pthread_attr_setdetachstate(&attrs, PTHREAD_CREATE_DETACHED);
static const size_t STACK_SIZE = 1024*1024; // if we change this we need to update the warning
struct rlimit limits;
verify(15887, getrlimit(RLIMIT_STACK, &limits) == 0);
if (limits.rlim_cur > STACK_SIZE) {
pthread_attr_setstacksize(&attrs, (DEBUG_BUILD
? (STACK_SIZE / 2)
: STACK_SIZE));
} else if (limits.rlim_cur < 1024*1024) {
warning() << "Stack size set to " << (limits.rlim_cur/1024) << "KB. We suggest 1MB" << endl;
}
pthread_t thread;
int failed = pthread_create(&thread, &attrs, (void*(*)(void*)) &pms::threadRun, p);
pthread_attr_destroy(&attrs);
if (failed) {
log() << "pthread_create failed: " << errnoWithDescription(failed) << endl;
throw boost::thread_resource_error(); // for consistency with boost::thread
}
#endif
}
catch ( boost::thread_resource_error& ) {
connTicketHolder.release();
log() << "can't create new thread, closing connection" << endl;
p->shutdown();
delete p;
sleepmillis(2);
}
catch ( ... ) {
connTicketHolder.release();
log() << "unknown error accepting new socket" << endl;
p->shutdown();
delete p;
sleepmillis(2);
}
}
virtual void setAsTimeTracker() {
Listener::setAsTimeTracker();
}
void run() {
initAndListen();
}
virtual bool useUnixSockets() const { return true; }
};
MessageServer * createServer( const MessageServer::Options& opts , MessageHandler * handler ) {
return new PortMessageServer( opts , handler );
}
}
#endif
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