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Rework the v2 API example to use a custom callback to better show how callbacks can be used for handling results

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This commit is contained in:
Matt Martz 2016-06-17 11:16:27 -05:00
parent eab10b2402
commit ab65150a9e
1 changed files with 21 additions and 7 deletions
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28
docsite/rst/developing_api.rst
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@ -39,13 +39,29 @@ In 2.0 things get a bit more complicated to start, but you end up with much more
#!/usr/bin/env python
import json
from collections import namedtuple
from ansible.parsing.dataloader import DataLoader
from ansible.vars import VariableManager
from ansible.inventory import Inventory
from ansible.playbook.play import Play
from ansible.executor.task_queue_manager import TaskQueueManager
from ansible.plugins import callback_loader
from ansible.plugins.callback import CallbackBase
class ResultCallback(CallbackBase):
"""A sample callback plugin used for performing an action as results come in
If you want to collect all results into a single object for processing at
the end of the execution, look into utilizing the ``json`` callback plugin
or writing your own custom callback plugin
"""
def v2_runner_on_ok(self, result, **kwargs):
"""Print a json representation of the result
This method could store the result in an instance attribute for retrieval later
"""
host = result._host
print json.dumps({host.name: result._result}, indent=4)
Options = namedtuple('Options', ['connection', 'module_path', 'forks', 'become', 'become_method', 'become_user', 'check'])
# initialize needed objects
@ -53,8 +69,9 @@ In 2.0 things get a bit more complicated to start, but you end up with much more
loader = DataLoader()
options = Options(connection='local', module_path='/path/to/mymodules', forks=100, become=None, become_method=None, become_user=None, check=False)
passwords = dict(vault_pass='secret')
# Use the JSON callback plugin to store results
results_callback = callback_loader.get('json')
# Instantiate our ResultCallback for handling results as they come in
results_callback = ResultCallback()
# create inventory and pass to var manager
inventory = Inventory(loader=loader, variable_manager=variable_manager, host_list='localhost')
@ -81,16 +98,13 @@ In 2.0 things get a bit more complicated to start, but you end up with much more
loader=loader,
options=options,
passwords=passwords,
stdout_callback=results_callback, # Use JSON callback plugin
stdout_callback=results_callback, # Use our custom callback instead of the ``default`` callback plugin
)
result = tqm.run(play)
finally:
if tqm is not None:
tqm.cleanup()
# Print stdout from the first play, first task, of localhost
print(results_callback.results[0]['tasks'][0]['hosts']['localhost']['stdout'])
.. _python_api_old: