DSMEngine.h

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// -*- mode: C++; indent-tabs-mode: nil; c-basic-offset: 4; tab-width: 4; -*-
// vim: set shiftwidth=4 softtabstop=4 expandtab:
/*
 ********************************************************************
 ** NIDAS: NCAR In-situ Data Acquistion Software
 **
 ** 2005, Copyright University Corporation for Atmospheric Research
 **
 ** This program is free software; you can redistribute it and/or modify
 ** it under the terms of the GNU General Public License as published by
 ** the Free Software Foundation; either version 2 of the License, or
 ** (at your option) any later version.
 **
 ** 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 General Public License for more details.
 **
 ** The LICENSE.txt file accompanying this software contains
 ** a copy of the GNU General Public License. If it is not found,
 ** write to the Free Software Foundation, Inc.,
 ** 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 **
 ********************************************************************
*/

#ifndef NIDAS_CORE_DSMENGINE_H
#define NIDAS_CORE_DSMENGINE_H

#include "ConnectionRequester.h"
#include "XMLException.h"
#include "NidasApp.h"
#include <nidas/util/Inet4SocketAddress.h>
#include <nidas/util/InvalidParameterException.h>

#include <set>

#include <signal.h>

namespace nidas { namespace core {

class Project;
class DSMConfig;
class DSMSensor;
class SensorHandler;
class SamplePipeline;
class DSMEngineIntf;
class XMLConfigInput;
class DSMEngineStat;

class DSMEngine : public SampleConnectionRequester {
public:

    DSMEngine();

    ~DSMEngine();

    static int main(int argc, char** argv) throw();

    static DSMEngine* getInstance() { return _instance; }

    void initLogger();

    int initProcess();

    int run() throw();

    int parseRunstring(int argc, char** argv);

    void usage();

    void start();

    void stop();

    void restart();

    void quit();

    void shutdown();

    void reboot();

    const DSMConfig* getDSMConfig() const { return _dsmConfig; }

    const SensorHandler* getSensorHandler() const { return _selector; }

    void registerSensorWithXmlRpc(const std::string& devname,DSMSensor*);

    enum command { DSM_STOP, DSM_RUN, DSM_QUIT, DSM_RESTART, DSM_REBOOT, DSM_SHUTDOWN };

    bool quitCommand(enum command command)
    {
        return command == DSM_QUIT || command == DSM_REBOOT || command == DSM_SHUTDOWN;
    }

    enum command getCommand() const { return _command; }

private:

    static DSMEngine* _instance;

    void setupSignals();

    void waitForSignal(int secs);

    void initialize(xercesc::DOMDocument* projectDoc)
            throw(nidas::util::InvalidParameterException);

    void startXmlRpcThread() throw(nidas::util::Exception);

    void killXmlRpcThread() throw();

    void openSensors() throw(nidas::util::IOException);

    void connectOutputs() throw(nidas::util::IOException);

    void connectProcessors() throw(nidas::util::IOException,
        nidas::util::InvalidParameterException);

    void disconnectProcessors() throw();

    void closeOutputs() throw();

    void interrupt();

    void deleteDataThreads() throw();

    void joinDataThreads() throw();

    void connect(SampleOutput*) throw();

    void disconnect(SampleOutput*) throw();

    void connect(SampleInput*) throw() { assert(false); }

    void disconnect(SampleInput*) throw() { assert(false); }

    bool _externalControl;
    bool _disableAutoconfig;
    enum run_states { DSM_RUNNING, DSM_ERROR, DSM_STOPPED } _runState;

    enum command _command;

    bool _syslogit;

    std::string _configFile;

    nidas::util::Inet4SocketAddress _configSockAddr;

    Project*         _project;

    DSMConfig*       _dsmConfig;

    SensorHandler*  _selector;

    SamplePipeline* _pipeline;

    DSMEngineStat*    _statusThread;

    DSMEngineIntf*   _xmlrpcThread;

    std::set<SampleOutput*> _outputSet;

    nidas::util::Mutex _outputMutex;

    int _logLevel;

    sigset_t _signalMask;

    pthread_t _myThreadId;

    NidasApp _app;

    NidasAppArg ExternalControl;
    NidasAppArg DisableAutoConfig;

    DSMEngine(const DSMEngine&);

    DSMEngine& operator=(const DSMEngine&);

};

}}  // namespace nidas namespace core

#endif