one/include/SyncRequest.h

/* -------------------------------------------------------------------------- */
/* Copyright 2002-2018, OpenNebula Project, OpenNebula Systems                */
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/* Licensed under the Apache License, Version 2.0 (the "License"); you may    */
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/* a copy of the License at                                                   */
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/* 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,          */
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/* See the License for the specific language governing permissions and        */
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/* -------------------------------------------------------------------------- */

#ifndef SYNC_REQUEST_H_
#define SYNC_REQUEST_H_

#include <time.h>

#include "ActionManager.h"

/**
 *  Base class to implement synchronous operation in the MadManagers. This class
 *  cannot be directly instantiated.
 */
class SyncRequest: public ActionListener
{
public:
    SyncRequest():
        result(false),
        message(""),
        timeout(false),
        id(-1),
        time_out(0)
    {
        am.addListener(this);
    };

    virtual ~SyncRequest(){};

    /**
     *  The result of the request, true if the operation succeeded
     */
    bool   result;

    /**
     *  Error message for negative results
     */
    std::string message;

    /**
     *  Time out, true if the request ended because of a time out
     */
    bool   timeout;

    /**
     *  Identification of this request
     */
    int    id;

    /**
     *  Notify client that we have an answer for the request
     */
    void notify()
    {
        am.finalize();
    };

    /**
     *  Wait for the AuthRequest to be completed
     */
    void wait()
    {
        time_out = time(0) + 90;//Requests will expire in 1.5 minutes

        am.loop();
    };

    /**
     *  Wait for the AuthRequest to be completed
     */
    void wait(time_t t)
    {
        am.loop(t);
    };

protected:

    friend class MadManager;

    /**
     *  Time in seconds when this request will expire
     */
    time_t  time_out;

    /**
     *  The ActionManager that will be notify when the request is ready.
     */
    ActionManager am;

    /**
     *  Timer action to finalize time-out waits
     */
    void timer_action(const ActionRequest& ar)
    {
        result  = false;
        timeout = true;
        message = "Operation time out";

        am.finalize();
    };
};

#endif /*SYNC_REQUEST_H_*/