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// listen.h
/* Copyright 2009 10gen Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the GNU Affero General Public License in all respects
* for all of the code used other than as permitted herein. If you modify
* file(s) with this exception, you may extend this exception to your
* version of the file(s), but you are not obligated to do so. If you do not
* wish to do so, delete this exception statement from your version. If you
* delete this exception statement from all source files in the program,
* then also delete it in the license file.
*/
#pragma once
#include <boost/noncopyable.hpp>
#include <boost/shared_ptr.hpp>
#include <boost/thread/mutex.hpp>
#include <boost/thread/condition_variable.hpp>
#include <set>
#include <string>
#include <vector>
#include "mongo/platform/atomic_word.h"
#include "mongo/util/concurrency/ticketholder.h"
#include "mongo/util/net/sock.h"
namespace mongo {
const int DEFAULT_MAX_CONN = 1000000;
class MessagingPort;
class Listener : boost::noncopyable {
public:
Listener(const std::string& name, const std::string &ip, int port, bool logConnect=true );
virtual ~Listener();
void initAndListen(); // never returns unless error (start a thread)
/* spawn a thread, etc., then return */
virtual void accepted(boost::shared_ptr<Socket> psocket, long long connectionId );
virtual void acceptedMP(MessagingPort *mp);
const int _port;
/**
* @return a rough estimate of elapsed time since the server started
todo:
1) consider adding some sort of relaxedLoad semantic to the reading here of
_elapsedTime
2) curTimeMillis() implementations have gotten faster. consider eliminating
this code? would have to measure it first. if eliminated be careful if
syscall used isn't skewable. Note also if #2 is done, listen() doesn't
then have to keep waking up and maybe that helps on a developer's laptop
battery usage...
*/
long long getMyElapsedTimeMillis() const { return _elapsedTime; }
/**
* Allocate sockets for the listener and set _setupSocketsSuccessful to true
* iff the process was successful.
*/
void setupSockets();
void setAsTimeTracker() {
_timeTracker = this;
}
// TODO(spencer): Remove this and get the global Listener via the
// globalEnvironmentExperiment
static const Listener* getTimeTracker() {
return _timeTracker;
}
static long long getElapsedTimeMillis() {
if ( _timeTracker )
return _timeTracker->getMyElapsedTimeMillis();
// should this assert or throw? seems like callers may not expect to get zero back, certainly not forever.
return 0;
}
/**
* Blocks until initAndListen has been called on this instance and gotten far enough that
* it is ready to receive incoming network requests.
*/
void waitUntilListening() const;
private:
std::vector<SockAddr> _mine;
std::vector<SOCKET> _socks;
std::string _name;
std::string _ip;
bool _setupSocketsSuccessful;
bool _logConnect;
long long _elapsedTime;
mutable boost::mutex _readyMutex; // Protects _ready
mutable boost::condition_variable _readyCondition; // Used to wait for changes to _ready
// Boolean that indicates whether this Listener is ready to accept incoming network requests
bool _ready;
#ifdef MONGO_SSL
SSLManagerInterface* _ssl;
#endif
void _logListen( int port , bool ssl );
static const Listener* _timeTracker;
virtual bool useUnixSockets() const { return false; }
public:
/** the "next" connection number. every connection to this process has a unique number */
static AtomicInt64 globalConnectionNumber;
/** keeps track of how many allowed connections there are and how many are being used*/
static TicketHolder globalTicketHolder;
/** makes sure user input is sane */
static void checkTicketNumbers();
};
class ListeningSockets {
public:
ListeningSockets()
: _sockets( new std::set<int>() )
, _socketPaths( new std::set<std::string>() )
{ }
void add( int sock ) {
boost::lock_guard<boost::mutex> lk( _mutex );
_sockets->insert( sock );
}
void addPath( const std::string& path ) {
boost::lock_guard<boost::mutex> lk( _mutex );
_socketPaths->insert( path );
}
void remove( int sock ) {
boost::lock_guard<boost::mutex> lk( _mutex );
_sockets->erase( sock );
}
void closeAll();
static ListeningSockets* get();
private:
boost::mutex _mutex;
std::set<int>* _sockets;
std::set<std::string>* _socketPaths; // for unix domain sockets
static ListeningSockets* _instance;
};
}
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