from planetstack.config import Config
from observer.steps import *
from syncstep import SyncStep
+from toposort import toposort
debug_mode = False
class StepNotReady(Exception):
pass
-def toposort(g, steps=None):
- if (not steps):
- keys = set(g.keys())
- values = set({})
- for v in g.values():
- values=values | set(v)
-
- steps=list(keys|values)
- reverse = {}
-
- for k,v in g.items():
- for rk in v:
- try:
- reverse[rk].append(k)
- except:
- reverse[rk]=k
-
- sources = []
- for k,v in g.items():
- if not reverse.has_key(k):
- sources.append(k)
-
-
- for k,v in reverse.iteritems():
- if (not v):
- sources.append(k)
-
- order = []
- marked = []
-
- while sources:
- n = sources.pop()
- try:
- for m in g[n]:
- if m not in marked:
- sources.append(m)
- marked.append(m)
- except KeyError:
- pass
- if (n in steps):
- order.append(n)
-
- order.reverse()
- order.extend(set(steps)-set(order))
- return order
-
class NoOpDriver:
def __init__(self):
self.enabled = True
self.driver = NoOpDriver()
def wait_for_event(self, timeout):
+ logger.info('Waiting for event')
self.event_cond.acquire()
self.event_cond.wait(timeout)
self.event_cond.release()
for dest in provides_dict[m]:
# no deps, pass
try:
- step_graph[source].append(dest)
+ if (dest not in step_graph[source]):
+ step_graph[source].append(dest)
except:
step_graph[source]=[dest]
except KeyError:
if (failed_step in step.dependencies):
raise StepNotReady
- def run(self):
- if not self.driver.enabled:
- return
- if (self.driver_kind=="openstack") and (not self.driver.has_openstack):
- return
- while True:
- try:
- logger.info('Waiting for event')
- tBeforeWait = time.time()
- self.wait_for_event(timeout=30)
- logger.info('Observer woke up')
+ def run_steps(self):
+ try:
+ logger.info('Observer run steps')
- # Set of whole steps that failed
- failed_steps = []
+ # Set of whole steps that failed
+ failed_steps = []
- # Set of individual objects within steps that failed
- failed_step_objects = set()
+ # Set of individual objects within steps that failed
+ failed_step_objects = set()
- for S in self.ordered_steps:
- step = self.step_lookup[S]
- start_time=time.time()
+ for S in self.ordered_steps:
+ step = self.step_lookup[S]
+ start_time=time.time()
+
+ sync_step = step(driver=self.driver)
+ sync_step.__name__ = step.__name__
+ sync_step.dependencies = []
+ try:
+ mlist = sync_step.provides
- sync_step = step(driver=self.driver)
- sync_step.__name__ = step.__name__
- sync_step.dependencies = []
- try:
- mlist = sync_step.provides
-
- for m in mlist:
- sync_step.dependencies.extend(self.model_dependency_graph[m.__name__])
- except KeyError:
- pass
- sync_step.debug_mode = debug_mode
+ for m in mlist:
+ sync_step.dependencies.extend(self.model_dependency_graph[m.__name__])
+ except KeyError:
+ pass
+ sync_step.debug_mode = debug_mode
- should_run = False
+ should_run = False
+ try:
+ # Various checks that decide whether
+ # this step runs or not
+ self.check_class_dependency(sync_step, failed_steps) # dont run Slices if Sites failed
+ self.check_schedule(sync_step) # dont run sync_network_routes if time since last run < 1 hour
+ should_run = True
+ except StepNotReady:
+ logging.info('Step not ready: %s'%sync_step.__name__)
+ failed_steps.append(sync_step)
+ except:
+ failed_steps.append(sync_step)
+
+ if (should_run):
try:
- # Various checks that decide whether
- # this step runs or not
- self.check_class_dependency(sync_step, failed_steps) # dont run Slices if Sites failed
- self.check_schedule(sync_step) # dont run sync_network_routes if time since last run < 1 hour
- should_run = True
- except StepNotReady:
- logging.info('Step not ready: %s'%sync_step.__name__)
- failed_steps.append(sync_step)
+ duration=time.time() - start_time
+
+ logger.info('Executing step %s' % sync_step.__name__)
+
+ # ********* This is the actual sync step
+ #import pdb
+ #pdb.set_trace()
+ failed_objects = sync_step(failed=list(failed_step_objects))
+
+
+ self.check_duration(sync_step, duration)
+ if failed_objects:
+ failed_step_objects.update(failed_objects)
+ self.update_run_time(sync_step)
except:
- failed_steps.append(sync_step)
+ failed_steps.append(S)
+ self.save_run_times()
+ except:
+ logger.log_exc("Exception in observer run loop")
+ traceback.print_exc()
- if (should_run):
- try:
- duration=time.time() - start_time
-
- logger.info('Executing step %s' % sync_step.__name__)
-
- # ********* This is the actual sync step
- #import pdb
- #pdb.set_trace()
- failed_objects = sync_step(failed=list(failed_step_objects))
-
-
- self.check_duration(sync_step, duration)
- if failed_objects:
- failed_step_objects.update(failed_objects)
- self.update_run_time(sync_step)
- except:
- failed_steps.append(S)
- self.save_run_times()
- except:
- logger.log_exc("Exception in observer run loop")
- traceback.print_exc()
+ def run(self):
+ try:
+ logger.info('Observer start run loop')
+ if not self.driver.enabled:
+ return
+ if (self.driver_kind=="openstack") and (not self.driver.has_openstack):
+ return
+
+ while True:
+ try:
+ self.wait_for_event(timeout=30)
+ except:
+ logger.log_exc("Exception in observer wait for event")
+ traceback.print_exc()
+
+ try:
+ self.run_steps()
+ except:
+ logger.log_exc("Exception in observer run steps")
+ traceback.print_exc()
+ except:
+ logger.log_exc("Exception in observer run loop")
+ traceback.print_exc()