def resolve_dns_name(name):
'''Uses a pool of DNSClients to resolve name to an IP address.
Keep a cache.
'''
# Is name an IP address?
try:
socket.inet_pton(socket.AF_INET, name)
return name
except socket.error:
# Not a valid IP address resolve it
pass
if name in hosts:
return hosts[name]
with synchronized('__diesel__.dns.' + name):
try:
ips, tm = cache[name]
if time.time() - tm > DNS_CACHE_TIME:
del cache[name]
cache[name]
except KeyError:
try:
with _pool.connection as conn:
ips = conn.resolve(name)
except (NotFound, Timeout):
raise DNSResolutionError("could not resolve A record for %s" %
name)
cache[name] = ips, time.time()
return random.choice(ips)
def sync_loop():
global sync
with synchronized():
sync += 1
sleep(random.random())
sync -= 1
print 'SYNC', sync
def resolve_dns_name(name):
'''Uses a pool of DNSClients to resolve name to an IP address.
Keep a cache.
'''
# Is name an IP address?
try:
socket.inet_pton(socket.AF_INET, name)
return name
except socket.error:
# Not a valid IP address resolve it
pass
if name in hosts:
return hosts[name]
with synchronized('__diesel__.dns.' + name):
try:
ips, tm = cache[name]
if time.time() - tm > DNS_CACHE_TIME:
del cache[name]
cache[name]
except KeyError:
try:
with _pool.connection as conn:
ips = conn.resolve(name)
except (NotFound, Timeout):
raise DNSResolutionError("could not resolve A record for %s" % name)
cache[name] = ips, time.time()
return random.choice(ips)
def sync_loop():
global sync
with synchronized():
sync += 1
sleep(random.random())
sync -= 1
print 'SYNC', sync
def sync_loop():
global sync
id = random.random()
with synchronized():
sync += 1
sleep(random.random())
sync -= 1
print "SYNC", sync
