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# 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 logging
import os
import sys
logging.basicConfig(level=logging.ERROR)
self_dir = os.path.abspath(os.path.dirname(__file__))
top_dir = os.path.abspath(os.path.join(os.path.dirname(__file__),
os.pardir,
os.pardir))
sys.path.insert(0, top_dir)
sys.path.insert(0, self_dir)
from taskflow import engines
from taskflow.patterns import linear_flow as lf
from taskflow import task
# INTRO: These examples show how to run an engine using the engine iteration
# capability, in between iterations other activities occur (in this case a
# value is output to stdout); but more complicated actions can occur at the
# boundary when an engine yields its current state back to the caller.
class EchoNameTask(task.Task):
def execute(self):
print(self.name)
f = lf.Flow("counter")
for i in range(0, 10):
f.add(EchoNameTask("echo_%s" % (i + 1)))
e = engines.load(f)
e.compile()
e.prepare()
for i, st in enumerate(e.run_iter(), 1):
print("Transition {}: {}".format(i, st))
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