# The MIT License (MIT)
#
# Copyright (c) 2015, Nicolas Sebrecht & contributors
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.

"""

Define runners for the workers.

"""

import traceback

from ..constants import WRK


def ConsumerRunner(runner, ui, workerName, tasks, emitter):
    try:
        while True:
            try:
                task =  tasks.getTask()
                if task is None: # No more task.
                    break # Quit the consumer loop.

                runner.consume(task)
                ui.debugC(WRK, "got task %s"% task)

            except KeyboardInterrupt:
                raise

            # Handle exceptions we can safely ignore.
            except Exception as e:
                ui.error('%s exception occured: %s\n%s',
                    workerName, e, traceback.format_exc())
                raise

        emitter.stopServing()
        ui.debugC(WRK, "runner ended")
    except Exception as e:
        ui.critical("%s got Exception", workerName)
        emitter.unkownInterruptionError(str(e))
