# The differences between callback types?

**URL:** <https://forum.ansible.com/t/the-differences-between-callback-types/22423>\
**Category:** Ansible Developer\
**Created:** [August 30, 2016, 4:04pm UTC](https://forum.ansible.com/t/the-differences-between-callback-types/22423 "2016-08-30T16:04:17Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![Sam\_S](https://avatars.discourse-cdn.com/v4/letter/s/edb3f5/32.png) [@Sam\_S](https://forum.ansible.com/u/Sam_S)\
**Post date:** [August 30, 2016, 4:04pm UTC](https://forum.ansible.com/t/the-differences-between-callback-types/22423/1 "2016-08-30T16:04:17Z")

</div>

I have to rework my callback plugin. I noticed there’s a variable called “CALLBACK\_TYPE” and depending on which one you use, you can grab certain values. Where the heck can I find more documentation regarding this?

---

<div class="post-metadata">

**Author:** ![sivel](https://sea1.discourse-cdn.com/ansible/user_avatar/forum.ansible.com/sivel/32/1198_2.png) [@sivel](https://forum.ansible.com/u/sivel)\
**Post date:** [August 30, 2016, 4:28pm UTC](https://forum.ansible.com/t/the-differences-between-callback-types/22423/2 "2016-08-30T16:28:16Z")

</div>

CALLBACK\_TYPE is really not important currently unless the CALLBACK\_TYPE is defined as `stdout`.

CALLBACK\_TYPE is only used in ansible.executor.task\_queue\_manager.TaskQueueManager.load\_callbacks to only load a single `stdout` callback. All others should work identically.

The really isn’t any documentation of these options, pretty much just the code in that function I specify above.