////////////////////////////////////////////////////////////////////////////////
/// @brief periodic V8 task
///
/// @file
///
/// DISCLAIMER
///
/// Copyright 2004-2014 triAGENS GmbH, Cologne, Germany
///
/// 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.
///
/// Copyright holder is triAGENS GmbH, Cologne, Germany
///
/// @author Dr. Frank Celler
/// @author Copyright 2014, triAGENS GmbH, Cologne, Germany
////////////////////////////////////////////////////////////////////////////////

#include "V8PeriodicTask.h"

#include "BasicsC/json.h"
#include "Dispatcher/Dispatcher.h"
#include "Scheduler/Scheduler.h"
#include "V8/v8-conv.h"
#include "V8Server/V8Job.h"
#include "VocBase/server.h"

using namespace std;
using namespace triagens::rest;
using namespace triagens::arango;

// -----------------------------------------------------------------------------
// --SECTION--                                      constructors and destructors
// -----------------------------------------------------------------------------

////////////////////////////////////////////////////////////////////////////////
/// @brief constructor
////////////////////////////////////////////////////////////////////////////////

V8PeriodicTask::V8PeriodicTask (string const& id, 
                                string const& name,
                                TRI_vocbase_t* vocbase,
                                ApplicationV8* v8Dealer,
                                Scheduler* scheduler,
                                Dispatcher* dispatcher,
                                double offset,
                                double period,
                                string const& command,
                                TRI_json_t* parameters)
  : Task(id, name),
    PeriodicTask(id, offset, period),
    _vocbase(vocbase),
    _v8Dealer(v8Dealer),
    _dispatcher(dispatcher),
    _command(command),
    _parameters(parameters),
    _created(TRI_microtime()) {

  assert(vocbase != 0);

  // increase reference counter for the database used
  TRI_UseVocBase(_vocbase);
}

////////////////////////////////////////////////////////////////////////////////
/// @brief destructor
////////////////////////////////////////////////////////////////////////////////

V8PeriodicTask::~V8PeriodicTask () {
  // decrease reference counter for the database used
  TRI_ReleaseVocBase(_vocbase);

  if (_parameters != 0) {
    TRI_FreeJson(TRI_UNKNOWN_MEM_ZONE, _parameters);
  }
}

// -----------------------------------------------------------------------------
// --SECTION--                                              PeriodicTask methods
// -----------------------------------------------------------------------------

////////////////////////////////////////////////////////////////////////////////
/// @brief get a task specific description in JSON format
////////////////////////////////////////////////////////////////////////////////

void V8PeriodicTask::getDescription (TRI_json_t* json) {
  PeriodicTask::getDescription(json);

  TRI_json_t* created = TRI_CreateNumberJson(TRI_UNKNOWN_MEM_ZONE, _created);
  TRI_Insert3ArrayJson(TRI_UNKNOWN_MEM_ZONE, json, "created", created);

  TRI_json_t* cmd = TRI_CreateString2CopyJson(TRI_UNKNOWN_MEM_ZONE, _command.c_str(), _command.size());
  TRI_Insert3ArrayJson(TRI_UNKNOWN_MEM_ZONE, json, "command", cmd);

  TRI_json_t* db = TRI_CreateStringCopyJson(TRI_UNKNOWN_MEM_ZONE, _vocbase->_name);
  TRI_Insert3ArrayJson(TRI_UNKNOWN_MEM_ZONE, json, "database", db);
}

////////////////////////////////////////////////////////////////////////////////
/// @brief handles the next tick
////////////////////////////////////////////////////////////////////////////////

bool V8PeriodicTask::handlePeriod () {
  V8Job* job = new V8Job(
    _vocbase,
    _v8Dealer,
    "(function (params) { " + _command + " } )(params);",
    _parameters);
    
  if (! _dispatcher->addJob(job)) {
    // just in case the dispatcher cannot accept the job (e.g. when shutting down)
    delete job;
  }

  return true;
}

// -----------------------------------------------------------------------------
// --SECTION--                                                       END-OF-FILE
// -----------------------------------------------------------------------------

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