I'm confused. I thought that you could only get/put entities from one
entity group in a transaction, but the example code for sharded
counters doesn't put its shards into a common entity group:
def increment(name):
"""Increment the value for a given sharded counter.
Parameters:
name - The name of the counter
"""
config = GeneralCounterShardConfig.get_or_insert(name, name=name)
def txn():
index = random.randint(0, config.num_shards - 1)
shard_name = name + str(index)
counter = GeneralCounterShard.get_by_key_name(shard_name)
if counter is None:
counter = GeneralCounterShard(key_name=shard_name, name=name)
counter.count += 1
counter.put()
db.run_in_transaction(txn)
memcache.incr(name)
Note that the GeneralCounterShard(...) constructor call doesn't set
the entity's parent.
What's up with that?
Thanks,
-n8
--
http://n8gray.org
--~--~---------~--~----~------------~-------~--~----~
You received this message because you are subscribed to the Google Groups
"Google App Engine" group.
To post to this group, send email to [email protected]
To unsubscribe from this group, send email to
[email protected]
For more options, visit this group at
http://groups.google.com/group/google-appengine?hl=en
-~----------~----~----~----~------~----~------~--~---
