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#!/usr/bin/env python
# Copyright (C) 2014 Yahoo! Inc. All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
import mock
import optparse
import os
import sys
top_dir = os.path.abspath(os.path.join(os.path.dirname(__file__),
os.pardir))
sys.path.insert(0, top_dir)
# To get this installed you have to do the following:
#
# $ pip install pydot2
import pydot
from automaton import machines
from taskflow.engines.action_engine import runner
from taskflow.engines.worker_based import protocol
from taskflow import states
# This is just needed to get at the runner builder object (we will not
# actually be running it...).
class DummyRuntime(object):
def __init__(self):
self.analyzer = mock.MagicMock()
self.completer = mock.MagicMock()
self.scheduler = mock.MagicMock()
self.storage = mock.MagicMock()
def clean_event(name):
name = name.replace("_", " ")
name = name.strip()
return name
def make_machine(start_state, transitions):
machine = machines.FiniteMachine()
machine.add_state(start_state)
for (start_state, end_state) in transitions:
if start_state not in machine:
machine.add_state(start_state)
if end_state not in machine:
machine.add_state(end_state)
# Make a fake event (not used anyway)...
event = "on_%s" % (end_state)
machine.add_transition(start_state, end_state, event.lower())
machine.default_start_state = start_state
return machine
def map_color(internal_states, state):
if state in internal_states:
return 'blue'
if state in (states.FAILURE, states.REVERT_FAILURE):
return 'red'
if state == states.REVERTED:
return 'darkorange'
if state in (states.SUCCESS, states.COMPLETE):
return 'green'
return None
def main():
parser = optparse.OptionParser()
parser.add_option("-f", "--file", dest="filename",
help="write svg to FILE", metavar="FILE")
parser.add_option("-t", "--tasks", dest="tasks",
action='store_true',
help="use task state transitions",
default=False)
parser.add_option("-r", "--retries", dest="retries",
action='store_true',
help="use retry state transitions",
default=False)
parser.add_option("-e", "--engines", dest="engines",
action='store_true',
help="use engine state transitions",
default=False)
parser.add_option("-w", "--wbe-requests", dest="wbe_requests",
action='store_true',
help="use wbe request transitions",
default=False)
parser.add_option("-j", "--jobs", dest="jobs",
action='store_true',
help="use job transitions",
default=False)
parser.add_option("-T", "--format", dest="format",
help="output in given format",
default='svg')
(options, args) = parser.parse_args()
if options.filename is None:
options.filename = 'states.%s' % options.format
types = [
options.engines,
options.retries,
options.tasks,
options.wbe_requests,
options.jobs,
]
if sum([int(i) for i in types]) > 1:
parser.error("Only one of task/retry/engines/wbe requests/jobs"
" may be specified.")
internal_states = list()
ordering = 'in'
if options.tasks:
source_type = "Tasks"
source = make_machine(states.PENDING,
list(states._ALLOWED_TASK_TRANSITIONS))
elif options.retries:
source_type = "Retries"
source = make_machine(states.PENDING,
list(states._ALLOWED_RETRY_TRANSITIONS))
elif options.engines:
source_type = "Engines"
r = runner.Runner(DummyRuntime(), mock.MagicMock())
source, memory = r.build()
internal_states.extend(runner._META_STATES)
ordering = 'out'
elif options.wbe_requests:
source_type = "WBE requests"
source = make_machine(protocol.WAITING,
list(protocol._ALLOWED_TRANSITIONS))
elif options.jobs:
source_type = "Jobs"
source = make_machine(states.UNCLAIMED,
list(states._ALLOWED_JOB_TRANSITIONS))
else:
source_type = "Flow"
source = make_machine(states.PENDING,
list(states._ALLOWED_FLOW_TRANSITIONS))
graph_name = "%s states" % source_type
g = pydot.Dot(graph_name=graph_name, rankdir='LR',
nodesep='0.25', overlap='false',
ranksep="0.5", size="11x8.5",
splines='true', ordering=ordering)
node_attrs = {
'fontsize': '11',
}
nodes = {}
for (start_state, on_event, end_state) in source:
on_event = clean_event(on_event)
if start_state not in nodes:
start_node_attrs = node_attrs.copy()
text_color = map_color(internal_states, start_state)
if text_color:
start_node_attrs['fontcolor'] = text_color
nodes[start_state] = pydot.Node(start_state, **start_node_attrs)
g.add_node(nodes[start_state])
if end_state not in nodes:
end_node_attrs = node_attrs.copy()
text_color = map_color(internal_states, end_state)
if text_color:
end_node_attrs['fontcolor'] = text_color
nodes[end_state] = pydot.Node(end_state, **end_node_attrs)
g.add_node(nodes[end_state])
if options.engines:
edge_attrs = {
'label': on_event,
}
if 'reverted' in on_event:
edge_attrs['fontcolor'] = 'darkorange'
if 'fail' in on_event:
edge_attrs['fontcolor'] = 'red'
if 'success' in on_event:
edge_attrs['fontcolor'] = 'green'
else:
edge_attrs = {}
g.add_edge(pydot.Edge(nodes[start_state], nodes[end_state],
**edge_attrs))
start = pydot.Node("__start__", shape="point", width="0.1",
xlabel='start', fontcolor='green', **node_attrs)
g.add_node(start)
g.add_edge(pydot.Edge(start, nodes[source.default_start_state], style='dotted'))
print("*" * len(graph_name))
print(graph_name)
print("*" * len(graph_name))
print(source.pformat())
print(g.to_string().strip())
g.write(options.filename, format=options.format)
print("Created %s at '%s'" % (options.format, options.filename))
# To make the svg more pretty use the following:
# $ xsltproc ../diagram-tools/notugly.xsl ./states.svg > pretty-states.svg
# Get diagram-tools from https://github.com/vidarh/diagram-tools.git
if __name__ == '__main__':
main()
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