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import gear
import sys
import json
import threading
import distbuild
# Artifact build states. These are used to loosely track the state of the
# remote cache.
UNBUILT = 'not-built'
BUILDING = 'building'
BUILT = 'built'
import logging
logging.basicConfig()
gear.Server()
class theController():
def __init__(self):
self.lock = threading.Lock()
self.graph_client = BuildGraphClient(self)
self.builder_client = BuilderClient(self)
self.builder_client.addServer('localhost')
self.builder_client.waitForServer() # Wait for at least one server to be connected
self.graph_client.addServer('localhost')
self.graph_client.waitForServer() # Wait for at least one server to be connected
self.artifact = None
self.build_started = False
def _process_build_graph(self, packet):
print "Decoding artifact received"
self.artifact = distbuild.decode_artifact_reference(job.data[-1])
print "Decoding artifact received done"
# Mark everything as unbuilt to begin with. We'll query the actua
# state from the cache in self._query_cache_state().
def set_initial_state(artifact):
artifact.state = UNBUILT
print "Setting them as unbuilt"
self._map_build_graph(self.artifact, set_initial_state)
print "Setting them as unbuilt done"
self.build_started = True
def _map_build_graph(self, artifact, callback, components=[]):
"""Run callback on each artifact in the build graph and return result.
If components is given, then only look at the components given and
their dependencies. Also, return a list of the components after they
have had callback called on them.
"""
result = []
mapped_components = []
done = set()
if components:
queue = list(components)
else:
queue = [artifact]
while queue:
a = queue.pop()
if a not in done:
result.append(callback(a))
queue.extend(a.dependencies)
done.add(a)
if a in components:
mapped_components.append(a)
return result, mapped_components
def find_artifacts_that_are_ready_to_build(self, root_artifact, components=[]):
'''Return unbuilt artifacts whose dependencies are all built.
The 'root_artifact' parameter is expected to be a tree of ArtifactReference
objects. These must have the 'state' attribute set to BUILT or UNBUILT. If
'components' is passed, then only those artifacts and their dependencies
will be built.
'''
def is_ready_to_build(artifact):
try:
is_ready = (artifact.state == UNBUILT and
all(a.state == BUILT
for a in artifact.dependencies))
except KeyError:
is_ready = False
return is_ready
with self.lock:
artifacts, _ = self._map_build_graph(root_artifact, lambda a: a,
components)
ready = [a for a in artifacts if is_ready_to_build(a)]
return ready
def _queue_worker_builds(self, artifacts):
'''Send a set of chunks to the WorkerBuildQueuer class for building.'''
logging.debug('Queuing more worker-builds to run')
while len(artifacts) > 0:
artifact = artifacts.pop()
logging.debug(
'Requesting worker-build of %s (%s)' %
(artifact.name, artifact.cache_key))
# TODO: launch build client
print "Start building %s" % artifact.name
job = gear.Job("reverse", artifact.cache_key)
print "lock set as building"
with self.lock:
artifact.state = BUILDING
print "set as building %s" % artifact.name
if artifact.kind == 'chunk':
# Chunk artifacts are not built independently
# so when we're building any chunk artifact
# we're also building all the chunk artifacts
# in this source
same_chunk_artifacts = [a for a in artifacts
if a.cache_key == artifact.cache_key]
for a in same_chunk_artifacts:
a.state = BUILDING
artifacts.remove(a)
self.builder_client.submitJob(job)
def _find_artifact(self, cache_key):
artifacts, _ = self._map_build_graph(self.artifact, lambda a: a)
wanted = [a for a in artifacts if a.cache_key == cache_key]
if wanted:
return wanted[0]
else:
return None
def _mark_artifact_as_built(self, cache_key):
print cache_key
def set_state(a):
if a.cache_key == artifact.cache_key:
a.state = BUILT
artifact = self._find_artifact(cache_key)
print "lock set as built"
with self.lock:
print "set as built %s" % artifact.name
artifact.state = BUILT
if artifact.kind == 'chunk':
# Building a single chunk artifact
# yields all chunk artifacts for the given source
# so we set the state of this source's artifacts
# to BUILT
self._map_build_graph(self.artifact, set_state)
print artifact
class BuildGraphClient(gear.Client):
def __init__(self, controller):
super(BuildGraphClient, self).__init__()
self.controller = controller
self.finished = False
def handleWorkComplete(self, packet):
job = super(BuildGraphClient, self).handleWorkComplete(packet)
print "workcomplete"
self.controller._process_build_graph(packet)
return job
def handleWorkData(self, packet):
job = super(BuildGraphClient, self).handleWorkData(packet)
print job.data[-1]
job.data = []
return job
def handleWorkFail(self, packet):
job = super(BuildGraphClient, self).handleWorkFail(packet)
print "workfail"
return job
def handleWorkException(self, packet):
job = super(BuildGraphClient, self).handleWorkException(packet)
print "workexception"
return job
def handleDisconnect(self, job):
job = super(BuildGraphClient, self).handleDisconnect(job)
print "disconnect"
class BuilderClient(gear.Client):
def __init__(self, controller):
super(BuilderClient, self).__init__()
self.controller = controller
self.finished = False
def handleWorkComplete(self, packet):
job = super(BuilderClient, self).handleWorkComplete(packet)
print "workcomplete"
self.controller._mark_artifact_as_built(job.arguments)
return job
controller = theController()
client = controller.graph_client
#job = gear.Job("reverse", "test string")
build_graph_request = {}
build_graph_request['repo'] = "baserock:baserock/definitions"
build_graph_request['ref'] = "master"
build_graph_request['system'] = "systems/minimal-system-x86_64-generic.morph"
s=json.dumps(build_graph_request)
print "Json produced: "
print s
job = gear.Job("build-graph", s)
client.submitJob(job)
# loop so that client doesn't die
while True:
import time
time.sleep(0.0001)
if controller.artifact != None and controller.build_started == True:
to_build = controller.find_artifacts_that_are_ready_to_build(controller.artifact)
#print to_build
controller._queue_worker_builds(to_build)
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