class DirectoryService(BaseDirectoryService):
"""
Provides a directory of services and other resources specific to an Org.
"""
def on_init(self):
self.directory = Directory()
# For easier interactive debugging
self.dss = None
self.ds = self.directory.datastore
try:
self.dss = self.directory.datastore.server[self.directory.datastore.datastore_name]
except Exception:
pass
def register(self, parent='/', key='', attributes={}):
return self.directory.register(parent, key, **attributes)
def unregister(self, parent='/', key=''):
return self.directory.unregister(parent, key)
def lookup(self, qualified_key=''):
return self.directory.lookup(qualified_key)
def find(self, parent='/', pattern=''):
raise NotImplementedError()
def test_non_persistent(self):
directory_service = Directory()
root = directory_service.lookup("/")
self.assertEquals(root, None)
self.assertEquals(directory_service.register("/","temp"), None)
# Create a node
root = directory_service.lookup("/temp")
self.assertEquals(root, {} )
# The create case
entry_old = directory_service.register("/temp", "entry1", foo="awesome")
self.assertEquals(entry_old, None)
entry_new = directory_service.lookup("/temp/entry1")
self.assertEquals(entry_new, {"foo":"awesome"})
# The update case
entry_old = directory_service.register("/temp", "entry1", foo="ingenious")
self.assertEquals(entry_old, {"foo":"awesome"})
# The delete case
entry_old = directory_service.unregister("/temp", "entry1")
self.assertEquals(entry_old, {"foo":"ingenious"})
entry_new = directory_service.lookup("/temp/entry1")
self.assertEquals(entry_new, None)
def lsdir(qname='/', truncate=True):
"""Prints all directory entries below the given node.
@param qname the directory node (must start with '/')
"""
from pyon.directory.directory import Directory
ds = Directory()
delist = ds.find_entries(qname)
detable = [(str(de._id), str(de.attributes)) for de in delist]
if truncate:
rows, columns = get_console_dimensions()
col1wid = get_max_width(detable, 0)
col1max = min(50 if columns>50 else 0, col1wid)
print pprint_table(detable, trunc=[-col1max,columns-col1max-2 if columns>col1max+3 else 0])
else:
print "\n".join(["%s: %s" % tup for tup in detable])
def on_init(self):
self.directory = Directory()
# For easier interactive debugging
self.dss = None
self.ds = self.directory.datastore
try:
self.dss = self.directory.datastore.server[self.directory.datastore.datastore_name]
except Exception:
pass
def start(self):
log.debug("Container starting...")
# Check if this UNIX process already runs a Container.
self.pidfile = "cc-pid-%d" % os.getpid()
if os.path.exists(self.pidfile):
raise Exception("Container.on_start(): Container is a singleton per UNIX process. Existing pid file found: %s" % self.pidfile)
# write out a PID file containing our agent messaging name
with open(self.pidfile, 'w') as f:
from pyon.core.bootstrap import sys_name
pid_contents = {'messaging': dict(CFG.server.amqp),
'container-agent': self.name,
'container-xp': sys_name }
f.write(msgpack.dumps(pid_contents))
atexit.register(self._cleanup_pid)
# set up abnormal termination handler for this container
def handl(signum, frame):
try:
self._cleanup_pid() # cleanup the pidfile first
self.quit() # now try to quit - will not error on second cleanup pidfile call
finally:
signal.signal(signal.SIGTERM, self._normal_signal)
os.kill(os.getpid(), signal.SIGTERM)
self._normal_signal = signal.signal(signal.SIGTERM, handl)
# Start ExchangeManager. In particular establish broker connection
self.ex_manager.start()
# TODO: Move this in ExchangeManager - but there is an error
self.node, self.ioloop = messaging.make_node() # TODO: shortcut hack
# Instantiate Directory singleton and self-register
# TODO: At this point, there is no special config override
self.directory = Directory()
self.directory.register("/Containers", self.id, cc_agent=self.name)
self.proc_manager.start()
self.app_manager.start()
# Start the CC-Agent API
rsvc = ProcessRPCServer(node=self.node, name=self.name, service=self, process=self)
# Start an ION process with the right kind of endpoint factory
self.proc_manager.proc_sup.spawn((CFG.cc.proctype or 'green', None), listener=rsvc)
rsvc.get_ready_event().wait(timeout=10) # @TODO: no hardcode
log.info("Container started, OK.")
class Container(BaseContainerAgent):
"""
The Capability Container. Its purpose is to spawn/monitor processes and services
that do the bulk of the work in the ION system.
"""
node = None
id = None
name = None
pidfile = None
instance = None
def __init__(self, *args, **kwargs):
BaseContainerAgent.__init__(self, *args, **kwargs)
# set id and name (as they are set in base class call)
self.id = string.replace('%s_%d' % (os.uname()[1], os.getpid()), ".", "_")
self.name = "cc_agent_%s" % self.id
Container.instance = self
# TODO: Bug: Replacing CFG instance not work because references are already public. Update directly
dict_merge(CFG, kwargs)
from pyon.core import bootstrap
bootstrap.sys_name = CFG.system.name or bootstrap.sys_name
log.debug("Container (sysname=%s) initializing ..." % bootstrap.sys_name)
# Keep track of the overrides from the command-line, so they can trump app/rel file data
self.spawn_args = DictModifier(CFG, kwargs)
# Load object and service registry
bootstrap_pyon()
# Create this Container's specific ExchangeManager instance
self.ex_manager = ExchangeManager(self)
# Create this Container's specific ProcManager instance
self.proc_manager = ProcManager(self)
# Create this Container's specific AppManager instance
self.app_manager = AppManager(self)
log.debug("Container initialized, OK.")
def start(self):
log.debug("Container starting...")
# Check if this UNIX process already runs a Container.
self.pidfile = "cc-pid-%d" % os.getpid()
if os.path.exists(self.pidfile):
raise Exception("Container.on_start(): Container is a singleton per UNIX process. Existing pid file found: %s" % self.pidfile)
# write out a PID file containing our agent messaging name
with open(self.pidfile, 'w') as f:
from pyon.core.bootstrap import sys_name
pid_contents = {'messaging': dict(CFG.server.amqp),
'container-agent': self.name,
'container-xp': sys_name }
f.write(msgpack.dumps(pid_contents))
atexit.register(self._cleanup_pid)
# set up abnormal termination handler for this container
def handl(signum, frame):
try:
self._cleanup_pid() # cleanup the pidfile first
self.quit() # now try to quit - will not error on second cleanup pidfile call
finally:
signal.signal(signal.SIGTERM, self._normal_signal)
os.kill(os.getpid(), signal.SIGTERM)
self._normal_signal = signal.signal(signal.SIGTERM, handl)
# Start ExchangeManager. In particular establish broker connection
self.ex_manager.start()
# TODO: Move this in ExchangeManager - but there is an error
self.node, self.ioloop = messaging.make_node() # TODO: shortcut hack
# Instantiate Directory singleton and self-register
# TODO: At this point, there is no special config override
self.directory = Directory()
self.directory.register("/Containers", self.id, cc_agent=self.name)
self.proc_manager.start()
self.app_manager.start()
# Start the CC-Agent API
rsvc = ProcessRPCServer(node=self.node, name=self.name, service=self, process=self)
# Start an ION process with the right kind of endpoint factory
self.proc_manager.proc_sup.spawn((CFG.cc.proctype or 'green', None), listener=rsvc)
rsvc.get_ready_event().wait(timeout=10) # @TODO: no hardcode
log.info("Container started, OK.")
def serve_forever(self):
""" Run the container until killed. """
log.debug("In Container.serve_forever")
if not self.proc_manager.proc_sup.running:
self.start()
try:
# This just waits in this Greenlet for all child processes to complete,
# which is triggered somewhere else.
self.proc_manager.proc_sup.join_children()
except (KeyboardInterrupt, SystemExit) as ex:
log.info('Received a kill signal, shutting down the container.')
except:
log.exception('Unhandled error! Forcing container shutdown')
self.proc_manager.proc_sup.shutdown(CFG.cc.timeout.shutdown)
def _cleanup_pid(self):
if self.pidfile:
log.debug("Cleanup pidfile: %s", self.pidfile)
try:
os.remove(self.pidfile)
except Exception, e:
log.warn("Pidfile could not be deleted: %s" % str(e))
self.pidfile = None
