[jira] [Closed] (AIRFLOW-1303) Slack post operator should be friendly to `on_failure_callback`

["Yu Ishikawa (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/AIRFLOW-1303?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Yu Ishikawa closed AIRFLOW-1303.
--------------------------------
    Resolution: Won't Do

TriggerRule would be nice to handle children tasks when the parent fails

> Slack post operator should be friendly to `on_failure_callback`
> ---------------------------------------------------------------
>
>                 Key: AIRFLOW-1303
>                 URL: https://issues.apache.org/jira/browse/AIRFLOW-1303
>             Project: Apache Airflow
>          Issue Type: Improvement
>          Components: operators
>            Reporter: Yu Ishikawa
>
> h2. Proposal
> In my view, we would like to use the slack post operator to notify error message when some tasks fail. Now, sending messages to slack is hacky a little with {{on_failure_callback}}. I understand we want to make `on_failure_callback` generic. However, we should write error handlings more naturally.
> 1. Add a method to handle failure in the slack post operator
> {noformat}
> # For example
> slack_post_operator = SlackPostOperator(....)
> operator1.on_failure_callback(slack_post_operator.handle_failure())
> {noformat}
> 2. {{on_failure_callback}} support operator argument
> {noformat}
> # For example,
> slack_post_operator = SlackPostOperator(....)
> operator.on_failure_operator(slack_post_operator)
> {noformat}
> Apart from that, we should have a good example to use {{on_failure_callback}}.



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