External workers task polling from external task list

Camunda 7 Topics Discussion & Questions
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  1. How the external workers know that the task was created and available in an external task list, so that worker can poll the task?

  2. How the process engine publishes a unit of work to a worker?

  3. How the worker aware of the external task was created?

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Polling means that the workers periodically ask the engine if there is work for them. I hope that answers all three questions.

edit: also have a look at the long polling feature for an optimization: https://docs.camunda.org/manual/7.9/user-guide/process-engine/external-tasks/#long-polling-to-fetch-and-lock-external-tasks

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So is that we need to implement polling logic to fetch the external task from list via Rest API, and currently there’s no implementation of polling logic available in camunda process?

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There are client libraries in Java and Javascript that do this for you:

In other languages, you have to do it yourself.

1 Like
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Can we convert this camunda-external-task-client-java as Microservice?

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