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Retry resolution of a buddy presence service up to 3 times

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This commit is contained in:
Dan Williams 2006-10-20 15:01:08 -04:00
parent c15e05ed39
commit 6290a5fae9
1 changed files with 27 additions and 4 deletions
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31
services/presence/PresenceService.py
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@ -49,6 +49,7 @@ class ServiceAdv(object):
self._local = local self._local = local
self._state = _SA_UNRESOLVED self._state = _SA_UNRESOLVED
self._resolver = None self._resolver = None
self._resolv_tries = 0
def __del__(self): def __del__(self):
if self._resolver: if self._resolver:
@ -66,6 +67,10 @@ class ServiceAdv(object):
return self._domain return self._domain
def is_local(self): def is_local(self):
return self._local return self._local
def resolv_tries(self):
return self._resolv_tries
def inc_resolv_tries(self):
self._resolv_tries += 1
def service(self): def service(self):
return self._service return self._service
def set_service(self, service): def set_service(self, service):
@ -76,8 +81,10 @@ class ServiceAdv(object):
def resolver(self): def resolver(self):
return self._resolver return self._resolver
def set_resolver(self, resolver): def set_resolver(self, resolver):
if not isinstance(resolver, dbus.Interface): if resolver and not isinstance(resolver, dbus.Interface):
raise ValueError("must be a valid dbus object") raise ValueError("'resolver' must be a valid dbus object")
if not resolver and self._resolver:
del self._resolver
self._resolver = resolver self._resolver = resolver
def state(self): def state(self):
return self._state return self._state
@ -85,6 +92,8 @@ class ServiceAdv(object):
if state == _SA_RESOLVE_PENDING: if state == _SA_RESOLVE_PENDING:
if self._state == _SA_RESOLVED: if self._state == _SA_RESOLVED:
raise ValueError("Can't reset to resolve pending from resolved.") raise ValueError("Can't reset to resolve pending from resolved.")
if state == _SA_UNRESOLVED:
self._resolv_tries = 0
self._state = state self._state = state
class RegisteredServiceType(object): class RegisteredServiceType(object):
@ -565,8 +574,21 @@ class PresenceService(object):
port, txt, flags, updated) port, txt, flags, updated)
def _service_resolved_failure_cb(self, adv, err): def _service_resolved_failure_cb(self, adv, err):
adv.set_state(_SA_UNRESOLVED) retried = False
logging.error("Error resolving service %s.%s: %s" % (adv.name(), adv.stype(), err)) adv.set_resolver(None)
if adv.stype() == Buddy.PRESENCE_SERVICE_TYPE:
# Retry the presence service type a few times
if adv.resolv_tries() < 4:
adv.set_state(_SA_RESOLVE_PENDING)
gobject.timeout_add(250, self._resolve_service, adv)
retried = True
logging.error("Retrying resolution of service %s.%s: %s" % (adv.name(),
adv.stype(), err))
if not retried:
logging.error("Error resolving service %s.%s: %s" % (adv.name(),
adv.stype(), err))
adv.set_state(_SA_UNRESOLVED)
def _resolve_service(self, adv): def _resolve_service(self, adv):
"""Resolve and lookup a ZeroConf service to obtain its address and TXT records.""" """Resolve and lookup a ZeroConf service to obtain its address and TXT records."""
@ -578,6 +600,7 @@ class PresenceService(object):
avahi.DBUS_INTERFACE_SERVICE_RESOLVER) avahi.DBUS_INTERFACE_SERVICE_RESOLVER)
resolver.connect_to_signal('Found', lambda *args: self._service_resolved_cb_glue(adv, *args)) resolver.connect_to_signal('Found', lambda *args: self._service_resolved_cb_glue(adv, *args))
resolver.connect_to_signal('Failure', lambda *args: self._service_resolved_failure_cb(adv, *args)) resolver.connect_to_signal('Failure', lambda *args: self._service_resolved_failure_cb(adv, *args))
adv.inc_resolv_tries()
adv.set_resolver(resolver) adv.set_resolver(resolver)
return False return False