250 lines
8.9 KiB
Python
250 lines
8.9 KiB
Python
# Copyright 2017 AT&T Intellectual Property. All other rights reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain 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,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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from copy import deepcopy
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from datetime import datetime
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from datetime import timezone
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from threading import Lock
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import uuid
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import drydock_provisioner.objects as objects
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import drydock_provisioner.objects.task as tasks
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from drydock_provisioner.error import DesignError, StateError
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class DesignState(object):
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def __init__(self):
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self.designs = {}
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self.designs_lock = Lock()
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self.promenade = {}
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self.promenade_lock = Lock()
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self.builds = []
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self.builds_lock = Lock()
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self.tasks = []
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self.tasks_lock = Lock()
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self.bootdata = {}
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self.bootdata_lock = Lock()
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return
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# TODO Need to lock a design base or change once implementation
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# has started
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def get_design(self, design_id):
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if design_id not in self.designs.keys():
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raise DesignError("Design ID %s not found" % (design_id))
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return objects.SiteDesign.obj_from_primitive(self.designs[design_id])
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def post_design(self, site_design):
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if site_design is not None:
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my_lock = self.designs_lock.acquire(blocking=True, timeout=10)
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if my_lock:
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design_id = site_design.id
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if design_id not in self.designs.keys():
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self.designs[design_id] = site_design.obj_to_primitive()
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else:
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self.designs_lock.release()
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raise StateError("Design ID %s already exists" % design_id)
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self.designs_lock.release()
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return True
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raise StateError("Could not acquire lock")
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else:
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raise DesignError("Design change must be a SiteDesign instance")
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def put_design(self, site_design):
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if site_design is not None:
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my_lock = self.designs_lock.acquire(blocking=True, timeout=10)
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if my_lock:
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design_id = site_design.id
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if design_id not in self.designs.keys():
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self.designs_lock.release()
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raise StateError("Design ID %s does not exist" % design_id)
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else:
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self.designs[design_id] = site_design.obj_to_primitive()
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self.designs_lock.release()
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return True
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raise StateError("Could not acquire lock")
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else:
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raise DesignError("Design base must be a SiteDesign instance")
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def get_current_build(self):
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latest_stamp = 0
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current_build = None
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for b in self.builds:
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if b.build_id > latest_stamp:
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latest_stamp = b.build_id
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current_build = b
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return deepcopy(current_build)
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def get_build(self, build_id):
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for b in self.builds:
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if b.build_id == build_id:
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return b
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return None
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def post_build(self, site_build):
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if site_build is not None and isinstance(site_build, SiteBuild):
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my_lock = self.builds_lock.acquire(block=True, timeout=10)
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if my_lock:
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exists = [
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b for b in self.builds if b.build_id == site_build.build_id
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]
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if len(exists) > 0:
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self.builds_lock.release()
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raise DesignError("Already a site build with ID %s" %
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(str(site_build.build_id)))
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self.builds.append(deepcopy(site_build))
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self.builds_lock.release()
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return True
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raise StateError("Could not acquire lock")
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else:
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raise DesignError("Design change must be a SiteDesign instance")
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def put_build(self, site_build):
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if site_build is not None and isinstance(site_build, SiteBuild):
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my_lock = self.builds_lock.acquire(block=True, timeout=10)
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if my_lock:
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buildid = site_build.buildid
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for b in self.builds:
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if b.buildid == buildid:
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b.merge_updates(site_build)
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self.builds_lock.release()
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return True
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self.builds_lock.release()
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return False
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raise StateError("Could not acquire lock")
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else:
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raise DesignError("Design change must be a SiteDesign instance")
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def get_task(self, task_id):
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for t in self.tasks:
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if t.get_id() == task_id or str(t.get_id()) == task_id:
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return deepcopy(t)
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return None
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def post_task(self, task):
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if task is not None and isinstance(task, tasks.Task):
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my_lock = self.tasks_lock.acquire(blocking=True, timeout=10)
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if my_lock:
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task_id = task.get_id()
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matching_tasks = [
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t for t in self.tasks if t.get_id() == task_id
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]
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if len(matching_tasks) > 0:
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self.tasks_lock.release()
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raise StateError("Task %s already created" % task_id)
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self.tasks.append(deepcopy(task))
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self.tasks_lock.release()
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return True
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else:
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raise StateError("Could not acquire lock")
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else:
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raise StateError("Task is not the correct type")
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def put_task(self, task, lock_id=None):
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if task is not None and isinstance(task, tasks.Task):
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my_lock = self.tasks_lock.acquire(blocking=True, timeout=10)
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if my_lock:
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task_id = task.get_id()
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t = self.get_task(task_id)
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if t.lock_id is not None and t.lock_id != lock_id:
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self.tasks_lock.release()
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raise StateError("Task locked for updates")
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task.lock_id = lock_id
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self.tasks = [
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i if i.get_id() != task_id else deepcopy(task)
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for i in self.tasks
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]
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self.tasks_lock.release()
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return True
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else:
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raise StateError("Could not acquire lock")
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else:
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raise StateError("Task is not the correct type")
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def lock_task(self, task_id):
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my_lock = self.tasks_lock.acquire(blocking=True, timeout=10)
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if my_lock:
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lock_id = uuid.uuid4()
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for t in self.tasks:
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if t.get_id() == task_id and t.lock_id is None:
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t.lock_id = lock_id
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self.tasks_lock.release()
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return lock_id
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self.tasks_lock.release()
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return None
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else:
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raise StateError("Could not acquire lock")
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def unlock_task(self, task_id, lock_id):
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my_lock = self.tasks_lock.acquire(blocking=True, timeout=10)
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if my_lock:
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for t in self.tasks:
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if t.get_id() == task_id and t.lock_id == lock_id:
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t.lock_id = None
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self.tasks_lock.release()
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return True
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self.tasks_lock.release()
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return False
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else:
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raise StateError("Could not acquire lock")
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def post_promenade_part(self, part):
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my_lock = self.promenade_lock.acquire(blocking=True, timeout=10)
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if my_lock:
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if self.promenade.get(part.target, None) is not None:
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self.promenade[part.target].append(part.obj_to_primitive())
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else:
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self.promenade[part.target] = [part.obj_to_primitive()]
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self.promenade_lock.release()
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return None
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else:
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raise StateError("Could not acquire lock")
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def get_promenade_parts(self, target):
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parts = self.promenade.get(target, None)
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if parts is not None:
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return [
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objects.PromenadeConfig.obj_from_primitive(p) for p in parts
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]
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else:
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# Return an empty list just to play nice with extend
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return []
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def set_bootdata_key(self, hostname, design_id, data_key):
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my_lock = self.bootdata_lock.acquire(blocking=True, timeout=10)
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if my_lock:
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self.bootdata[hostname] = {'design_id': design_id, 'key': data_key}
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self.bootdata_lock.release()
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return None
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else:
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raise StateError("Could not acquire lock")
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def get_bootdata_key(self, hostname):
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return self.bootdata.get(hostname, None)
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