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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
Download Patch File Download Diff File Expand all files Collapse all files

22
tests/test_stasis_endpoints.c
View File

@@ -255,32 +255,18 @@ AST_TEST_DEFINE(channel_messages)
ast_hangup(chan);
chan = NULL;
actual_count = stasis_message_sink_wait_for_count(sink, 6,
actual_count = stasis_message_sink_wait_for_count(sink, 3,
STASIS_SINK_DEFAULT_WAIT);
ast_test_validate(test, 6 == actual_count);
ast_test_validate(test, 3 == actual_count);
msg = sink->messages[1];
type = stasis_message_type(msg);
ast_test_validate(test, stasis_cache_update_type() == type);
ast_test_validate(test, ast_channel_snapshot_type() == type);
msg = sink->messages[2];
type = stasis_message_type(msg);
ast_test_validate(test, ast_channel_snapshot_type() == type);
msg = sink->messages[3];
type = stasis_message_type(msg);
ast_test_validate(test, stasis_cache_update_type() == type);
/* The ordering of the cache clear and endpoint snapshot are
* unspecified */
msg = sink->messages[4];
if (stasis_message_type(msg) == stasis_cache_clear_type()) {
/* Okay; the next message should be the endpoint snapshot */
msg = sink->messages[5];
}
type = stasis_message_type(msg);
ast_test_validate(test, ast_endpoint_snapshot_type() == type);
actual_snapshot = stasis_message_data(msg);
ast_test_validate(test, 0 == actual_snapshot->num_channels);