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/*
* Asterisk -- An open source telephony toolkit.
*
* Copyright (C) 2013, Digium, Inc.
*
* David M. Lee, II <dlee@digium.com>
*
* See http://www.asterisk.org for more information about
* the Asterisk project. Please do not directly contact
* any of the maintainers of this project for assistance;
* the project provides a web site, mailing lists and IRC
* channels for your use.
*
* This program is free software, distributed under the terms of
* the GNU General Public License Version 2. See the LICENSE file
* at the top of the source tree.
*/
/*! \file
*
* \brief Stasis endpoint API.
*
* \author David M. Lee, II <dlee@digium.com>
*/
/*** MODULEINFO
<support_level>core</support_level>
***/
#include "asterisk.h"
ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
#include "asterisk/astobj2.h"
#include "asterisk/stasis.h"
#include "asterisk/stasis_endpoints.h"
STASIS_MESSAGE_TYPE_DEFN(ast_endpoint_snapshot_type);
static struct stasis_topic *endpoint_topic_all;
static struct stasis_caching_topic *endpoint_topic_all_cached;
struct stasis_topic *ast_endpoint_topic_all(void)
{
return endpoint_topic_all;
}
struct stasis_caching_topic *ast_endpoint_topic_all_cached(void)
{
return endpoint_topic_all_cached;
}
struct ast_endpoint_snapshot *ast_endpoint_latest_snapshot(const char *tech,
const char *name)
{
RAII_VAR(char *, id, NULL, ast_free);
RAII_VAR(struct stasis_message *, msg, NULL, ao2_cleanup);
struct ast_endpoint_snapshot *snapshot;
ast_asprintf(&id, "%s/%s", tech, name);
if (!id) {
return NULL;
}
msg = stasis_cache_get(ast_endpoint_topic_all_cached(),
ast_endpoint_snapshot_type(), id);
if (!msg) {
return NULL;
}
snapshot = stasis_message_data(msg);
ast_assert(snapshot != NULL);
ao2_ref(snapshot, +1);
return snapshot;
}
/*!
* \brief Callback extract a unique identity from a snapshot message.
*
* This identity is unique to the underlying object of the snapshot, such as the
* UniqueId field of a channel.
*
* \param message Message to extract id from.
* \return String representing the snapshot's id.
* \return \c NULL if the message_type of the message isn't a handled snapshot.
* \since 12
*/
static const char *endpoint_snapshot_get_id(struct stasis_message *message)
{
struct ast_endpoint_snapshot *snapshot;
if (ast_endpoint_snapshot_type() != stasis_message_type(message)) {
return NULL;
}
snapshot = stasis_message_data(message);
return snapshot->id;
}
static void endpoints_stasis_shutdown(void)
{
ao2_cleanup(endpoint_topic_all);
endpoint_topic_all = NULL;
stasis_caching_unsubscribe(endpoint_topic_all_cached);
endpoint_topic_all_cached = NULL;
}
struct ast_json *ast_endpoint_snapshot_to_json(
const struct ast_endpoint_snapshot *snapshot)
{
RAII_VAR(struct ast_json *, json, NULL, ast_json_unref);
struct ast_json *channel_array;
int i;
json = ast_json_pack("{s: s, s: s, s: s, s: []}",
"technology", snapshot->tech,
"resource", snapshot->resource,
"state", ast_endpoint_state_to_string(snapshot->state),
"channels");
if (json == NULL) {
return NULL;
}
if (snapshot->max_channels != -1) {
int res = ast_json_object_set(json, "max_channels",
ast_json_integer_create(snapshot->max_channels));
if (res != 0) {
return NULL;
}
}
channel_array = ast_json_object_get(json, "channels");
ast_assert(channel_array != NULL);
for (i = 0; i < snapshot->num_channels; ++i) {
int res = ast_json_array_append(channel_array,
ast_json_stringf("channel:%s",
snapshot->channel_ids[i]));
if (res != 0) {
return NULL;
}
}
return ast_json_ref(json);
}
int ast_endpoint_stasis_init(void)
{
ast_register_atexit(endpoints_stasis_shutdown);
if (!endpoint_topic_all) {
endpoint_topic_all = stasis_topic_create("endpoint_topic_all");
}
if (!endpoint_topic_all) {
return -1;
}
if (!endpoint_topic_all_cached) {
endpoint_topic_all_cached =
stasis_caching_topic_create(
endpoint_topic_all, endpoint_snapshot_get_id);
}
if (!endpoint_topic_all_cached) {
return -1;
}
if (STASIS_MESSAGE_TYPE_INIT(ast_endpoint_snapshot_type) != 0) {
return -1;
}
return 0;
}
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