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Use dictionary cache to do group -> state fetching

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This commit is contained in:
Erik Johnston 2015-08-05 15:06:51 +01:00
parent c67ba143fa
commit 07507643cb
7 changed files with 195 additions and 110 deletions
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54
synapse/util/dictionary_cache.py
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@ -16,6 +16,10 @@
from synapse.util.lrucache import LruCache
from collections import namedtuple
import threading
import logging
logger = logging.getLogger(__name__)
DictionaryEntry = namedtuple("DictionaryEntry", ("full", "value"))
@ -47,21 +51,25 @@ class DictionaryCache(object):
)
def get(self, key, dict_keys=None):
entry = self.cache.get(key, self.sentinel)
if entry is not self.sentinel:
# cache_counter.inc_hits(self.name)
try:
entry = self.cache.get(key, self.sentinel)
if entry is not self.sentinel:
# cache_counter.inc_hits(self.name)
if dict_keys is None:
return DictionaryEntry(entry.full, dict(entry.value))
else:
return DictionaryEntry(entry.full, {
k: entry.value[k]
for k in dict_keys
if k in entry.value
})
if dict_keys is None:
return DictionaryEntry(entry.full, dict(entry.value))
else:
return DictionaryEntry(entry.full, {
k: entry.value[k]
for k in dict_keys
if k in entry.value
})
# cache_counter.inc_misses(self.name)
return DictionaryEntry(False, {})
# cache_counter.inc_misses(self.name)
return DictionaryEntry(False, {})
except:
logger.exception("get failed")
raise
def invalidate(self, key):
self.check_thread()
@ -77,14 +85,18 @@ class DictionaryCache(object):
self.cache.clear()
def update(self, sequence, key, value, full=False):
self.check_thread()
if self.sequence == sequence:
# Only update the cache if the caches sequence number matches the
# number that the cache had before the SELECT was started (SYN-369)
if full:
self._insert(key, value)
else:
self._update_or_insert(key, value)
try:
self.check_thread()
if self.sequence == sequence:
# Only update the cache if the caches sequence number matches the
# number that the cache had before the SELECT was started (SYN-369)
if full:
self._insert(key, value)
else:
self._update_or_insert(key, value)
except:
logger.exception("update failed")
raise
def _update_or_insert(self, key, value):
entry = self.cache.setdefault(key, DictionaryEntry(False, {}))