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stasis_cache_pattern: Backport to 13

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Somehow stasis_cache_pattern got out of sync between 13 and master
and it was causing duplicate channel message issues in 13 when
related to a specific endpoint. I.E. from statsd,
'endpoints.PJSIP.1174.channels 0|g' was being emitted twice.

Backporting stasis_cache_pattern from master to 13 solved
the issue and running the unit and testsuite tests confirmed
that no new ones were created.

ASTERISK-25317 #close

Change-Id: Ia8707462f62d15eed14541c37f332a7bbbceb548
This commit is contained in:
George Joseph
2016-01-05 10:06:32 -07:00
parent e13719bff1
commit d228b62fd4
3 changed files with 15 additions and 39 deletions
Download Patch File Download Diff File Expand all files Collapse all files

21
include/asterisk/stasis_cache_pattern.h
View File

@@ -121,9 +121,12 @@ struct stasis_cp_single *stasis_cp_single_create(struct stasis_cp_all *all,
const char *name);
/*!
* \brief Create the 'one' side of the cache pattern.
* \brief Create a sink in the cache pattern
*
* Create the 'one' but do not automatically forward.
* Create the 'one' but do not automatically forward to the all's topic.
* This is useful when aggregating other topic's messages created with
* \c stasis_cp_single_create in another caching topic without replicating
* those messages in the all's topics.
*
* Dispose of using stasis_cp_single_unsubscribe().
*
@@ -131,21 +134,9 @@ struct stasis_cp_single *stasis_cp_single_create(struct stasis_cp_all *all,
* \param name Base name for the topics.
* \return One side instance
*/
struct stasis_cp_single *stasis_cp_single_create_only(struct stasis_cp_all *all,
struct stasis_cp_single *stasis_cp_sink_create(struct stasis_cp_all *all,
const char *name);
/*!
* \brief Set up a topic and topic cache forward.
*
* Forward 'from' to 'to'.
*
* \param from Source 'one' side instance.
* \param to Destination 'one' side instance.
* \retval 0 Success
* \retval -1 Failure
*/
int stasis_cp_single_forward(struct stasis_cp_single *from, struct stasis_cp_single *to);
/*!
* \brief Stops caching and forwarding messages.
*

12
main/endpoints.c
View File

@@ -74,6 +74,8 @@ struct ast_endpoint {
struct stasis_message_router *router;
/*! ast_str_container of channels associated with this endpoint */
struct ao2_container *channel_ids;
/*! Forwarding subscription from an endpoint to its tech endpoint */
struct stasis_forward *tech_forward;
};
static int endpoint_hash(const void *obj, int flags)
@@ -303,7 +305,7 @@ static struct ast_endpoint *endpoint_internal_create(const char *tech, const cha
if (!ast_strlen_zero(resource)) {
endpoint->topics = stasis_cp_single_create_only(ast_endpoint_cache_all(),
endpoint->topics = stasis_cp_single_create(ast_endpoint_cache_all(),
endpoint->id);
if (!endpoint->topics) {
return NULL;
@@ -322,14 +324,13 @@ static struct ast_endpoint *endpoint_internal_create(const char *tech, const cha
return NULL;
}
if (stasis_cp_single_forward(endpoint->topics, tech_endpoint->topics)) {
return NULL;
}
endpoint->tech_forward = stasis_forward_all(stasis_cp_single_topic(endpoint->topics),
stasis_cp_single_topic(tech_endpoint->topics));
endpoint_publish_snapshot(endpoint);
ao2_link(endpoints, endpoint);
} else {
endpoint->topics = stasis_cp_single_create(ast_endpoint_cache_all(),
endpoint->topics = stasis_cp_sink_create(ast_endpoint_cache_all(),
endpoint->id);
if (!endpoint->topics) {
return NULL;
@@ -382,6 +383,7 @@ void ast_endpoint_shutdown(struct ast_endpoint *endpoint)
}
ao2_unlink(endpoints, endpoint);
endpoint->tech_forward = stasis_forward_cancel(endpoint->tech_forward);
clear_msg = create_endpoint_snapshot_message(endpoint);
if (clear_msg) {

21
main/stasis_cache_pattern.c
View File

@@ -138,7 +138,7 @@ struct stasis_cp_single *stasis_cp_single_create(struct stasis_cp_all *all,
{
RAII_VAR(struct stasis_cp_single *, one, NULL, ao2_cleanup);
one = stasis_cp_single_create_only(all, name);
one = stasis_cp_sink_create(all, name);
if (!one) {
return NULL;
}
@@ -157,7 +157,7 @@ struct stasis_cp_single *stasis_cp_single_create(struct stasis_cp_all *all,
return one;
}
struct stasis_cp_single *stasis_cp_single_create_only(struct stasis_cp_all *all,
struct stasis_cp_single *stasis_cp_sink_create(struct stasis_cp_all *all,
const char *name)
{
RAII_VAR(struct stasis_cp_single *, one, NULL, ao2_cleanup);
@@ -180,23 +180,6 @@ struct stasis_cp_single *stasis_cp_single_create_only(struct stasis_cp_all *all,
return one;
}
int stasis_cp_single_forward(struct stasis_cp_single *from, struct stasis_cp_single *to)
{
from->forward_topic_to_all = stasis_forward_all(from->topic, to->topic);
if (!from->forward_topic_to_all) {
return -1;;
}
from->forward_cached_to_all = stasis_forward_all(
stasis_caching_get_topic(from->topic_cached),
stasis_caching_get_topic(to->topic_cached));
if (!from->forward_cached_to_all) {
return -1;
}
return 0;
}
void stasis_cp_single_unsubscribe(struct stasis_cp_single *one)
{
if (!one) {