gearman/libgearman/function/function_v1.hpp

/*  vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
 * 
 *  Gearmand client and server library.
 *
 *  Copyright (C) 2011 Data Differential, http://datadifferential.com/
 *  All rights reserved.
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#pragma once

/**
  Private structure.
*/
class FunctionV1: public _worker_function_st
{
  gearman_worker_fn *_worker_fn;

public:
  FunctionV1(const gearman_function_t &function_,
             gearman_worker_fn *worker_fn_arg, void *context_arg) :
    _worker_function_st(function_, context_arg),
    _worker_fn(worker_fn_arg)
  { }

  bool has_callback() const
  {
    return bool(_worker_fn);
  }

  gearman_function_error_t callback(gearman_job_st* job_shell, void *context_arg)
  {
    Job* job= job_shell->impl();

    if (gearman_job_is_map(job))
    {
      gearman_job_build_reducer(job, NULL);
    }

    job->_error_code= GEARMAN_SUCCESS;
    job->_worker.work_result= _worker_fn(job_shell, context_arg, &(job->_worker.work_result_size), &job->_error_code);

    if (job->_error_code == GEARMAN_LOST_CONNECTION)
    {
      return GEARMAN_FUNCTION_ERROR;
    }

    if (job->_error_code == GEARMAN_SHUTDOWN)
    {
      return GEARMAN_FUNCTION_SHUTDOWN;
    }

    if (gearman_failed(job->_error_code))
    {
      return GEARMAN_FUNCTION_FATAL;
    }

    return GEARMAN_FUNCTION_SUCCESS;
  }
};