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# 2. Transitioning from python-gearman 1.x to 2.0.0

## 2.1. Client (single task)

    # python-gearman 1.x
    old_client = gearman.GearmanClient(['localhost:4730'])
    old_result = old_client.do_task(Task("echo", "foo"))

    # python-gearman 2.x
    new_client = gearman.GearmanClient(['localhost:4730'])
    current_request = new_client.submit_job('echo', 'foo')
    new_result = current_request.result

## 2.2. Client (multiple tasks)

    # python-gearman 1.x
    old_client = gearman.GearmanClient(['localhost:4730'])
    ts = Taskset([
        Task(func="echo", arg="foo"),
        Task(func="echo", arg="bar"),
    ])
    old_client.do_taskset(ts)
    for task in ts.values():
        assert task.result == task.arg

    # python-gearman 2.x
    new_client = gearman.GearmanClient(['localhost:4730'])
    new_jobs = [
        dict(task='echo', data='foo'),
        dict(task='echo', data='bar'),
    ]

    completed_requests = new_client.submit_multiple_jobs(new_jobs)
    for current_request in completed_requests:
        assert current_request.result == current_request.job.data

## 2.3. Worker

    # python-gearman 1.x
    class WorkerHook(object):
        def start(self, current_job):
            print "Job started"

        def fail(self, current_job, exc_info):
            print "Job failed, can't stop last gasp GEARMAN_COMMAND_WORK_FAIL"

        def complete(self, current_job, result):
            print "Job complete, can't stop last gasp GEARMAN_COMMAND_WORK_COMPLETE"

    def callback_fxn(idle, last_job_time):
        return False

    old_worker = gearman.GearmanWorker(['localhost:4730'])
    old_worker.register_function("echo", lambda job:job.arg)
    old_worker.work(stop_if=callback_fxn, hooks=WorkerHook())

    # python-gearman 2.x
    class CustomGearmanWorker(gearman.GearmanWorker):
        def on_job_execute(self, current_job):
            print "Job started"
            return super(CustomGearmanWorker, self).on_job_execute(current_job)

        def on_job_exception(self, current_job, exc_info):
            print "Job failed, CAN stop last gasp GEARMAN_COMMAND_WORK_FAIL"
            return super(CustomGearmanWorker, self).on_job_exception(current_job, exc_info)

        def on_job_complete(self, current_job, job_result):
            print "Job failed, CAN stop last gasp GEARMAN_COMMAND_WORK_FAIL"
            return super(CustomGearmanWorker, self).send_job_complete(current_job, job_result)

        def after_poll(self, any_activity):
            # Return True if you want to continue polling, replaces callback_fxn
            return True

    def task_callback(gearman_worker, job):
        return job.data

    new_worker = CustomGearmanWorker(['localhost:4730'])
    new_worker.register_task("echo", task_callback)
    new_worker.work()

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