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Posted to dev@tinkerpop.apache.org by davebshow <gi...@git.apache.org> on 2016/12/07 18:54:47 UTC

[GitHub] tinkerpop issue #478: TINKERPOP-1490 Implemented promise API for Traversal

Github user davebshow commented on the issue:

    https://github.com/apache/tinkerpop/pull/478
  
    Well I implemented this API for gremlin-python. There is one major problem: side effects. Since the current side effect API is designed to be synchronous (calling `run_sync`), it cannot be used inside a coroutine, as  demonstrated by this [test](https://github.com/apache/tinkerpop/blob/54fac5146a5ac067e75f2fbfe135fae2da641c35/gremlin-python/src/main/jython/tests/driver/test_driver_remote_connection.py#L210). This is problematic for a Tornado or Asyncio based driver. I think in the future we should consider the possibility that the `promise()` method return a `AsyncSideEffect` object so the end user can leverage the async techniques with side effects.


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