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#!/usr/bin/env python3
# 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.
from unittest 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)
from automaton.converters import pydot
from automaton import machines
from taskflow.engines.action_engine import builder
from taskflow.engines.worker_based import protocol
from taskflow import states
# This is just needed to get at the machine 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()
self.selector = mock.MagicMock()
def make_machine(start_state, transitions, event_name_cb):
machine = machines.FiniteMachine()
machine.add_state(start_state)
machine.default_start_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)
event = event_name_cb(start_state, end_state)
machine.add_transition(start_state, end_state, event)
return machine
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("--flow", dest="flow",
action='store_true',
help="use flow 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,
options.flow,
]
provided = sum([int(i) for i in types])
if provided > 1:
parser.error("Only one of task/retry/engines/wbe requests/jobs/flow"
" may be specified.")
if provided == 0:
parser.error("One of task/retry/engines/wbe requests/jobs/flow"
" must be specified.")
event_name_cb = lambda start_state, end_state: "on_%s" % end_state.lower()
internal_states = list()
ordering = 'in'
if options.tasks:
source_type = "Tasks"
source = make_machine(states.PENDING,
list(states._ALLOWED_TASK_TRANSITIONS),
event_name_cb)
elif options.retries:
source_type = "Retries"
source = make_machine(states.PENDING,
list(states._ALLOWED_RETRY_TRANSITIONS),
event_name_cb)
elif options.flow:
source_type = "Flow"
source = make_machine(states.PENDING,
list(states._ALLOWED_FLOW_TRANSITIONS),
event_name_cb)
elif options.engines:
source_type = "Engines"
b = builder.MachineBuilder(DummyRuntime(), mock.MagicMock())
source, memory = b.build({})
internal_states.extend(builder.META_STATES)
ordering = 'out'
elif options.wbe_requests:
source_type = "WBE requests"
source = make_machine(protocol.WAITING,
list(protocol._ALLOWED_TRANSITIONS),
event_name_cb)
elif options.jobs:
source_type = "Jobs"
source = make_machine(states.UNCLAIMED,
list(states._ALLOWED_JOB_TRANSITIONS),
event_name_cb)
graph_attrs = {
'ordering': ordering,
}
graph_name = "%s states" % source_type
def node_attrs_cb(state):
node_color = None
if state in internal_states:
node_color = 'blue'
if state in (states.FAILURE, states.REVERT_FAILURE):
node_color = 'red'
if state == states.REVERTED:
node_color = 'darkorange'
if state in (states.SUCCESS, states.COMPLETE):
node_color = 'green'
node_attrs = {}
if node_color:
node_attrs['fontcolor'] = node_color
return node_attrs
def edge_attrs_cb(start_state, on_event, end_state):
edge_attrs = {}
if options.engines:
edge_attrs['label'] = on_event.replace("_", " ").strip()
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'
return edge_attrs
g = pydot.convert(source, graph_name, graph_attrs=graph_attrs,
node_attrs_cb=node_attrs_cb, edge_attrs_cb=edge_attrs_cb)
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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