def get_cache(cache_class, namespace, max_entries=1000,
redis_host='localhost', redis_port=6379, redis_protocol=None):
"""
Utility API for get a cache instance with a txRedis client
attached--instead of normal synchronous redis-py redis client.
This returns a Deferred that will fire with a cache instance or errback if
we cannot connect.
Example:
def got_cache_instance(cache):
cache.get('a').addCallback(...)
...
d = get_cache(LruCache, 'urls', max_entries=100000,
redis_host='example.com', redis_port=6379,
redis_protocol=HiRedisClient)
d.addCallback(got_cache_instance)
"""
def got_connection(client):
return cache_class(namespace, max_entries=max_entries,
client=client)
d = get_redis_client(redis_host, redis_port, redis_protocol)
d.addCallback(got_connection)
return d
def get_event_count(key, redis_host='localhost', redis_port=6379,
redis_protocol=None):
def got_connection(client):
return TxEventCount(key, client=client)
d = get_redis_client(redis_host, redis_port, redis_protocol)
d.addCallback(got_connection)
return d
