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stasis: Use an implementation specific channel snapshot cache.

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Channels no longer use the Stasis cache for channel snapshots. Instead
they are stored in a hash table in stasis_channels which reduces the
number of Stasis messages created and allows better storage.

As a result the following APIs are no longer available since the stasis
cache is no longer used:
ast_channel_topic_cached()
ast_channel_topic_all_cached()

The ast_channel_cache_all() and ast_channel_cache_by_name() functions
now return an ao2_container of ast_channel_snapshots rather than
a container of stasis_messages therefore you can't (and don't need
to) call stasis_cache functions on it.

The ast_channel_topic_all() function now returns a normal topic not
a cached one so you can't use stasis cache functions on it either.

The ast_channel_snapshot_type() stasis message now has the
ast_channel_snapshot_update structure as it's data. It contains the
last snapshot and the new one.

ast_channel_snapshot_get_latest() still returns the latest snapshot.

The latest snapshot is now stored on the channel itself to eliminate
cache hits when Stasis messages that have the snapshot as a payload
are created.

ASTERISK-28102

Change-Id: I9334febff60a82d7c39703e49059fa3a68825786
This commit is contained in:
Joshua Colp
2018-10-10 11:28:18 -03:00
parent 0a60bc1a68
commit d0ccbb3377
28 changed files with 456 additions and 551 deletions
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6
channels/pjsip/cli_commands.c
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@@ -169,9 +169,8 @@ static int cli_channelstats_compare(void *obj, void *arg, int flags)
static int cli_message_to_snapshot(void *obj, void *arg, int flags)
{
struct stasis_message *message = obj;
struct ast_channel_snapshot *snapshot = obj;
struct ao2_container *snapshots = arg;
struct ast_channel_snapshot *snapshot = stasis_message_data(message);
if (!strcmp(snapshot->type, "PJSIP")) {
ao2_link(snapshots, snapshot);
@@ -198,8 +197,7 @@ static struct ao2_container *get_container(const char *regex, ao2_sort_fn sort_f
{
struct ao2_container *child_container;
regex_t regexbuf;
RAII_VAR(struct ao2_container *, parent_container,
stasis_cache_dump(ast_channel_cache_by_name(), ast_channel_snapshot_type()), ao2_cleanup);
RAII_VAR(struct ao2_container *, parent_container, ast_channel_cache_by_name(), ao2_cleanup);
if (!parent_container) {
return NULL;