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 List of Worker Events
=======================

This is the list of events sent by the worker.
The monitor uses these to visualize the state of the cluster.

Task Events
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* task-received(uuid, name, args, kwargs, retries, eta, hostname, timestamp)

    Sent when the worker receives a task.

* task-accepted(uuid, hostname, timestamp)

    Sent just before the worker executes the task.

* task-succeeded(uuid, result, hostname, timestamp)

    Sent if the task executed successfully.
    (EDIT: Should probably add the time it took to execute the task here?
    Then we could get rid of the old statistics code.)

* task-failed(uuid, exception, traceback, hostname, timestamp)

    Sent if the execution of the task failed.

* task-retried(uuid, exception, traceback, hostname, delay, timestamp)

    Sent if the task failed, but will be retried in the future.
    (**NOT IMPLEMENTED**)

Worker Events
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* worker-online(hostname, timestamp)

    The worker has connected to the broker and is online.

* worker-heartbeat(hostname, timestamp)

    Sent every minute, if the worker has not sent a heartbeat in 2 minutes,
    it's considered to be offline.

* worker-offline(hostname, timestamp)

    The worker has disconnected from the broker.