018dbf628d
To make it hopefully easier to understand the commonality of this function and its handlers have the handlers be defined at the top of the function and use the common list in the node iteration routine when resetting/matching. Change-Id: I288eb548172b2f6f35e2bd90683f2065d3aa02dc
133 lines
4.7 KiB
Python
133 lines
4.7 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright (C) 2014 Yahoo! Inc. All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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from taskflow.engines.action_engine.actions import retry as ra
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from taskflow.engines.action_engine.actions import task as ta
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from taskflow.engines.action_engine import analyzer as an
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from taskflow.engines.action_engine import completer as co
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from taskflow.engines.action_engine import runner as ru
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from taskflow.engines.action_engine import scheduler as sched
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from taskflow.engines.action_engine import scopes as sc
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from taskflow import states as st
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from taskflow.utils import misc
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class Runtime(object):
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"""A aggregate of runtime objects, properties, ... used during execution.
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This object contains various utility methods and properties that represent
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the collection of runtime components and functionality needed for an
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action engine to run to completion.
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"""
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def __init__(self, compilation, storage, atom_notifier, task_executor):
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self._atom_notifier = atom_notifier
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self._task_executor = task_executor
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self._storage = storage
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self._compilation = compilation
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self._walkers_to_names = {}
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@property
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def compilation(self):
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return self._compilation
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@property
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def storage(self):
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return self._storage
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@misc.cachedproperty
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def analyzer(self):
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return an.Analyzer(self)
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@misc.cachedproperty
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def runner(self):
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return ru.Runner(self, self._task_executor)
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@misc.cachedproperty
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def completer(self):
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return co.Completer(self)
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@misc.cachedproperty
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def scheduler(self):
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return sched.Scheduler(self)
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@misc.cachedproperty
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def retry_action(self):
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return ra.RetryAction(self._storage,
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self._atom_notifier)
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@misc.cachedproperty
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def task_action(self):
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return ta.TaskAction(self._storage,
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self._atom_notifier,
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self._task_executor)
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def fetch_scopes_for(self, atom_name):
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"""Fetches a walker of the visible scopes for the given atom."""
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try:
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return self._walkers_to_names[atom_name]
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except KeyError:
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atom = None
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for node in self.analyzer.iterate_all_nodes():
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if node.name == atom_name:
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atom = node
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break
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if atom is not None:
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walker = sc.ScopeWalker(self.compilation, atom,
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names_only=True)
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self._walkers_to_names[atom_name] = walker
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else:
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walker = None
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return walker
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# Various helper methods used by the runtime components; not for public
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# consumption...
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def reset_nodes(self, nodes, state=st.PENDING, intention=st.EXECUTE):
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tweaked = []
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node_state_handlers = [
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(self.task_action, {'progress': 0.0}),
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(self.retry_action, {}),
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]
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for node in nodes:
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if state or intention:
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tweaked.append((node, state, intention))
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if state:
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handled = False
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for h, kwargs in node_state_handlers:
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if h.handles(node):
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h.change_state(node, state, **kwargs)
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handled = True
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break
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if not handled:
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raise TypeError("Unknown how to reset state of"
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" node '%s' (%s)" % (node, type(node)))
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if intention:
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self.storage.set_atom_intention(node.name, intention)
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return tweaked
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def reset_all(self, state=st.PENDING, intention=st.EXECUTE):
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return self.reset_nodes(self.analyzer.iterate_all_nodes(),
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state=state, intention=intention)
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def reset_subgraph(self, node, state=st.PENDING, intention=st.EXECUTE):
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return self.reset_nodes(self.analyzer.iterate_subgraph(node),
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state=state, intention=intention)
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def retry_subflow(self, retry):
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self.storage.set_atom_intention(retry.name, st.EXECUTE)
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self.reset_subgraph(retry)
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