diff options
author | David M. Lee <dlee@digium.com> | 2013-08-01 13:49:34 +0000 |
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committer | David M. Lee <dlee@digium.com> | 2013-08-01 13:49:34 +0000 |
commit | e1b959ccbb4e47421b37a0f75a2bf89ccd34dcb1 (patch) | |
tree | 3026c96da713bafcf1126c77bde6994f348280bb /res/stasis | |
parent | 5c1396946929ab19e94c117f8ad3db5f78a450bc (diff) |
Split caching out from the stasis_caching_topic.
In working with res_stasis, I discovered a significant limitation to
the current structure of stasis_caching_topics: you cannot subscribe
to cache updates for a single channel/bridge/endpoint/etc.
To address this, this patch splits the cache away from the
stasis_caching_topic, making it a first class object. The stasis_cache
object is shared amongst individual stasis_caching_topics that are
created per channel/endpoint/etc. These are still forwarded to global
whatever_all_cached topics, so their use from most of the code does
not change.
In making these changes, I noticed that we frequently used a similar
pattern for bridges, endpoints and channels:
single_topic ----------------> all_topic
^
|
single_topic_cached ----+----> all_topic_cached
|
+----> cache
This pattern was extracted as the 'Stasis Caching Pattern', defined in
stasis_caching_pattern.h. This avoids a lot of duplicate code between
the different domain objects.
Since the cache is now disassociated from its upstream caching topics,
this also necessitated a change to how the 'guaranteed' flag worked
for retrieving from a cache. The code for handling the caching
guarantee was extracted into a 'stasis_topic_wait' function, which
works for any stasis_topic.
(closes issue ASTERISK-22002)
Review: https://reviewboard.asterisk.org/r/2672/
git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@395954 65c4cc65-6c06-0410-ace0-fbb531ad65f3
Diffstat (limited to 'res/stasis')
-rw-r--r-- | res/stasis/control.c | 6 |
1 files changed, 1 insertions, 5 deletions
diff --git a/res/stasis/control.c b/res/stasis/control.c index 1fbae0c7c..94f1d700d 100644 --- a/res/stasis/control.c +++ b/res/stasis/control.c @@ -364,13 +364,9 @@ struct ast_channel_snapshot *stasis_app_control_get_snapshot( const struct stasis_app_control *control) { RAII_VAR(struct stasis_message *, msg, NULL, ao2_cleanup); - struct stasis_caching_topic *caching_topic; struct ast_channel_snapshot *snapshot; - caching_topic = ast_channel_topic_all_cached(); - ast_assert(caching_topic != NULL); - - msg = stasis_cache_get(caching_topic, ast_channel_snapshot_type(), + msg = stasis_cache_get(ast_channel_cache(), ast_channel_snapshot_type(), stasis_app_control_get_channel_id(control)); if (!msg) { return NULL; |