ASTERISK_REGISTER_FILE no longer has any purpose so this commit removes all traces of it. Previously exported symbols removed: * __ast_register_file * __ast_unregister_file * ast_complete_source_filename This also removes the mtx_prof static variable that was declared when MTX_PROFILE was enabled. This variable was only used in lock.c so it is now initialized in that file only. ASTERISK-26480 #close Change-Id: I1074af07d71f9e159c48ef36631aa432c86f9966
186 lines
5.8 KiB
C
186 lines
5.8 KiB
C
/*
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* Asterisk -- An open source telephony toolkit.
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*
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* Copyright (C) 2013, Digium, Inc.
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*
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* David M. Lee, II <dlee@digium.com>
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*
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* See http://www.asterisk.org for more information about
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* the Asterisk project. Please do not directly contact
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* any of the maintainers of this project for assistance;
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* the project provides a web site, mailing lists and IRC
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* channels for your use.
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*
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* This program is free software, distributed under the terms of
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* the GNU General Public License Version 2. See the LICENSE file
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* at the top of the source tree.
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*/
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/*!
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* \brief Statsd channel stats. Exmaple of how to subscribe to Stasis events.
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*
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* This module subscribes to the channel caching topic and issues statsd stats
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* based on the received messages.
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*
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* \author David M. Lee, II <dlee@digium.com>
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* \since 12
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*/
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/*** MODULEINFO
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<depend>res_statsd</depend>
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<defaultenabled>no</defaultenabled>
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<support_level>extended</support_level>
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***/
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#include "asterisk.h"
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#include "asterisk/module.h"
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#include "asterisk/stasis_channels.h"
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#include "asterisk/stasis_message_router.h"
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#include "asterisk/statsd.h"
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#include "asterisk/time.h"
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/*! Regular Stasis subscription */
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static struct stasis_subscription *sub;
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/*! Stasis message router */
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static struct stasis_message_router *router;
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/*!
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* \brief Subscription callback for all channel messages.
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* \param data Data pointer given when creating the subscription.
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* \param sub This subscription.
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* \param topic The topic the message was posted to. This is not necessarily the
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* topic you subscribed to, since messages may be forwarded between
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* topics.
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* \param message The message itself.
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*/
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static void statsmaker(void *data, struct stasis_subscription *sub,
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struct stasis_message *message)
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{
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RAII_VAR(struct ast_str *, metric, NULL, ast_free);
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if (stasis_subscription_final_message(sub, message)) {
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/* Normally, data points to an object that must be cleaned up.
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* The final message is an unsubscribe notification that's
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* guaranteed to be the last message this subscription receives.
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* This would be a safe place to kick off any needed cleanup.
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*/
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return;
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}
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/* For no good reason, count message types */
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metric = ast_str_create(80);
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if (metric) {
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ast_str_set(&metric, 0, "stasis.message.%s",
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stasis_message_type_name(stasis_message_type(message)));
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ast_statsd_log(ast_str_buffer(metric), AST_STATSD_METER, 1);
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}
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}
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/*!
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* \brief Router callback for \ref stasis_cache_update messages.
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* \param data Data pointer given when added to router.
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* \param sub This subscription.
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* \param topic The topic the message was posted to. This is not necessarily the
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* topic you subscribed to, since messages may be forwarded between
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* topics.
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* \param message The message itself.
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*/
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static void updates(void *data, struct stasis_subscription *sub,
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struct stasis_message *message)
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{
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/* Since this came from a message router, we know the type of the
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* message. We can cast the data without checking its type.
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*/
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struct stasis_cache_update *update = stasis_message_data(message);
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/* We're only interested in channel snapshots, so check the type
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* of the underlying message.
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*/
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if (ast_channel_snapshot_type() != update->type) {
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return;
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}
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/* There are three types of cache updates.
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* !old && new -> Initial cache entry
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* old && new -> Updated cache entry
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* old && !new -> Cache entry removed.
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*/
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if (!update->old_snapshot && update->new_snapshot) {
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/* Initial cache entry; count a channel creation */
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ast_statsd_log_string("channels.count", AST_STATSD_GAUGE, "+1", 1.0);
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} else if (update->old_snapshot && !update->new_snapshot) {
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/* Cache entry removed. Compute the age of the channel and post
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* that, as well as decrementing the channel count.
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*/
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struct ast_channel_snapshot *last;
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int64_t age;
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last = stasis_message_data(update->old_snapshot);
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age = ast_tvdiff_ms(*stasis_message_timestamp(message),
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last->creationtime);
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ast_statsd_log("channels.calltime", AST_STATSD_TIMER, age);
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/* And decrement the channel count */
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ast_statsd_log_string("channels.count", AST_STATSD_GAUGE, "-1", 1.0);
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}
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}
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/*!
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* \brief Router callback for any message that doesn't otherwise have a route.
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* \param data Data pointer given when added to router.
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* \param sub This subscription.
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* \param topic The topic the message was posted to. This is not necessarily the
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* topic you subscribed to, since messages may be forwarded between
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* topics.
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* \param message The message itself.
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*/
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static void default_route(void *data, struct stasis_subscription *sub,
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struct stasis_message *message)
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{
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if (stasis_subscription_final_message(sub, message)) {
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/* Much like with the regular subscription, you may need to
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* perform some cleanup when done with a message router. You
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* can look for the final message in the default route.
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*/
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return;
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}
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}
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static int load_module(void)
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{
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/* You can create a message router to route messages by type */
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router = stasis_message_router_create(
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ast_channel_topic_all_cached());
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if (!router) {
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return AST_MODULE_LOAD_FAILURE;
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}
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stasis_message_router_add(router, stasis_cache_update_type(),
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updates, NULL);
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stasis_message_router_set_default(router, default_route, NULL);
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/* Or a subscription to receive all of the messages from a topic */
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sub = stasis_subscribe(ast_channel_topic_all(), statsmaker, NULL);
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if (!sub) {
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return AST_MODULE_LOAD_FAILURE;
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}
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return AST_MODULE_LOAD_SUCCESS;
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}
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static int unload_module(void)
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{
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stasis_unsubscribe_and_join(sub);
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sub = NULL;
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stasis_message_router_unsubscribe_and_join(router);
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router = NULL;
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return 0;
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}
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AST_MODULE_INFO(ASTERISK_GPL_KEY, AST_MODFLAG_DEFAULT, "Example of how to use Stasis",
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.support_level = AST_MODULE_SUPPORT_EXTENDED,
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.load = load_module,
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.unload = unload_module,
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.nonoptreq = "res_statsd"
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);
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