135 lines
3.9 KiB
Python
135 lines
3.9 KiB
Python
from serializer import SynergyObject
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from threading import Condition
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from threading import Event
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from threading import Thread
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__author__ = "Lisa Zangrando"
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__email__ = "lisa.zangrando[AT]pd.infn.it"
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__copyright__ = """Copyright (c) 2015 INFN - INDIGO-DataCloud
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All Rights Reserved
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Licensed under the Apache License, Version 2.0;
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you may not use this file except in compliance with the
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License. You may obtain a copy of the License at:
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing,
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software distributed under the License is distributed on an
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"AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
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either express or implied.
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See the License for the specific language governing
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permissions and limitations under the License."""
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class Manager(SynergyObject, Thread):
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def __init__(self, name=None):
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super(Manager, self).__init__()
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self.condition = Condition()
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self.stop_event = Event()
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self.setDaemon(True)
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self.setName(name)
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self.setStatus("CREATED")
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self.setRate(-1)
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self.config_opts = []
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self.paused = True # start out paused
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self.managers = {}
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def execute(self, command, *args, **kargs):
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raise NotImplementedError
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def task(self):
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raise NotImplementedError
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def doOnEvent(self, event_type, *args, **kargs):
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raise NotImplementedError
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def getManagers(self):
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return self.managers
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def getManager(self, name):
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return self.managers.get(name, None)
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def notify(self, event_type="DEFAULT", manager_name=None, *args, **kargs):
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if manager_name is not None:
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if manager_name in self.managers:
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self.managers[manager_name].doOnEvent(event_type,
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*args, **kargs)
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else:
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for manager in self.managers.values():
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if manager.getName() != manager_name:
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manager.doOnEvent(event_type, *args, **kargs)
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def getOptions(self):
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return self.config_opts
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def getStatus(self):
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return self.get("status")
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def setStatus(self, status):
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with self.condition:
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self.set("status", status)
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self.condition.notifyAll()
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def isAutoStart(self):
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return self.get("autostart")
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def setAutoStart(self, autostart):
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self.set("autostart", autostart)
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self.paused = not autostart
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def getRate(self):
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return self.get("rate")
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def setRate(self, rate):
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self.set("rate", rate)
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def setup(self):
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"""Manager initialization
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Hook to do additional manager initialization when one requests
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the service be started. This is called before any service record
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is created.
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Child classes should override this method.
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"""
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raise NotImplementedError
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def destroy(self):
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raise NotImplementedError
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def stop(self):
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if self.isAlive():
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# set event to signal thread to terminate
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self.stop_event.set()
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self.resume()
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# block calling thread until thread really has terminated
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self.join()
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def pause(self):
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with self.condition:
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self.paused = True
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self.condition.notifyAll()
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def resume(self):
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with self.condition:
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self.paused = False
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self.condition.notifyAll()
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def run(self):
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while not self.stop_event.isSet():
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with self.condition:
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if self.paused:
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self.setStatus("ACTIVE")
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self.condition.wait()
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else:
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self.setStatus("RUNNING")
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try:
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self.task()
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self.condition.wait(self.getRate() * 60)
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except Exception as ex:
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print("task %r: %s" % (self.getName(), ex))
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