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res_mwi_external: Clear the stasis cache entry when the external MWI is deleted.

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One of the things missing when external MWI support was added was the
ability to clear the stasis cache entry of deleted external MWI mailboxes.

Review: https://reviewboard.asterisk.org/r/3325/
........

Merged revisions 410555 from http://svn.asterisk.org/svn/asterisk/branches/12


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@410557 65c4cc65-6c06-0410-ace0-fbb531ad65f3
changes/97/197/1
Richard Mudgett 11 years ago
parent 251868dc57
commit 66718a06f7
3 changed files with 149 additions and 35 deletions
Show Stats Download Patch File Download Diff File

57
include/asterisk/app.h
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@ -1341,13 +1341,14 @@ int ast_app_parse_timelen(const char *timestr, int *result, enum ast_timelen def
/*!
* \since 12
* \brief Publish a MWI state update via stasis
* \param[in] mailbox The number identifying this mailbox
*
* \param[in] mailbox The mailbox identifier string.
* \param[in] context The context this mailbox resides in (NULL or "" if only using mailbox)
* \param[in] new_msgs The number of new messages in this mailbox
* \param[in] old_msgs The number of old messages in this mailbox
*
* \retval 0 Success
* \retval -1 Failure
* \since 12
*/
#define ast_publish_mwi_state(mailbox, context, new_msgs, old_msgs) \
ast_publish_mwi_state_full(mailbox, context, new_msgs, old_msgs, NULL, NULL)
@ -1355,15 +1356,16 @@ int ast_app_parse_timelen(const char *timestr, int *result, enum ast_timelen def
/*!
* \since 12
* \brief Publish a MWI state update associated with some channel
* \param[in] mailbox The number identifying this mailbox
*
* \param[in] mailbox The mailbox identifier string.
* \param[in] context The context this mailbox resides in (NULL or "" if only using mailbox)
* \param[in] new_msgs The number of new messages in this mailbox
* \param[in] old_msgs The number of old messages in this mailbox
* \param[in] channel_id A unique identifier for a channel associated with this
* change in mailbox state
*
* \retval 0 Success
* \retval -1 Failure
* \since 12
*/
#define ast_publish_mwi_state_channel(mailbox, context, new_msgs, old_msgs, channel_id) \
ast_publish_mwi_state_full(mailbox, context, new_msgs, old_msgs, channel_id, NULL)
@ -1371,23 +1373,51 @@ int ast_app_parse_timelen(const char *timestr, int *result, enum ast_timelen def
/*!
* \since 12
* \brief Publish a MWI state update via stasis with all parameters
* \param[in] mailbox The number identifying this mailbox
*
* \param[in] mailbox The mailbox identifier string.
* \param[in] context The context this mailbox resides in (NULL or "" if only using mailbox)
* \param[in] new_msgs The number of new messages in this mailbox
* \param[in] old_msgs The number of old messages in this mailbox
* \param[in] channel_id A unique identifier for a channel associated with this
* change in mailbox state
* \param[in] eid The EID of the server that originally published the message
*
* \retval 0 Success
* \retval -1 Failure
* \since 12
*/
int ast_publish_mwi_state_full(
const char *mailbox,
const char *context,
int new_msgs,
int old_msgs,
const char *channel_id,
struct ast_eid *eid);
const char *mailbox,
const char *context,
int new_msgs,
int old_msgs,
const char *channel_id,
struct ast_eid *eid);
/*!
* \since 12.2.0
* \brief Delete MWI state cached by stasis
*
* \param[in] mailbox The mailbox identifier string.
* \param[in] context The context this mailbox resides in (NULL or "" if only using mailbox)
*
* \retval 0 Success
* \retval -1 Failure
*/
#define ast_delete_mwi_state(mailbox, context) \
ast_delete_mwi_state_full(mailbox, context, NULL)
/*!
* \since 12.2.0
* \brief Delete MWI state cached by stasis with all parameters
*
* \param[in] mailbox The mailbox identifier string.
* \param[in] context The context this mailbox resides in (NULL or "" if only using mailbox)
* \param[in] eid The EID of the server that originally published the message
*
* \retval 0 Success
* \retval -1 Failure
*/
int ast_delete_mwi_state_full(const char *mailbox, const char *context, struct ast_eid *eid);
/*! \addtogroup StasisTopicsAndMessages
* @{
@ -1421,6 +1451,9 @@ struct ast_mwi_blob {
* \since 12
* \brief Create a \ref ast_mwi_state object
*
* \param[in] mailbox The mailbox identifier string.
* \param[in] context The context this mailbox resides in (NULL or "" if only using mailbox)
*
* \retval \ref ast_mwi_state object on success
* \retval NULL on error
*/

117
main/app.c
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@ -2821,36 +2821,51 @@ struct ast_mwi_state *ast_mwi_create(const char *mailbox, const char *context)
return mwi_state;
}
int ast_publish_mwi_state_full(
const char *mailbox,
const char *context,
int new_msgs,
int old_msgs,
const char *channel_id,
struct ast_eid *eid)
/*!
* \internal
* \brief Create a MWI state snapshot message.
* \since 12.2.0
*
* \param[in] mailbox The mailbox identifier string.
* \param[in] context The context this mailbox resides in (NULL or "" if only using mailbox)
* \param[in] new_msgs The number of new messages in this mailbox
* \param[in] old_msgs The number of old messages in this mailbox
* \param[in] channel_id A unique identifier for a channel associated with this
* change in mailbox state
* \param[in] eid The EID of the server that originally published the message
*
* \retval message on success. Use ao2_cleanup() when done with it.
* \retval NULL on error.
*/
static struct stasis_message *mwi_state_create_message(
const char *mailbox,
const char *context,
int new_msgs,
int old_msgs,
const char *channel_id,
struct ast_eid *eid)
{
RAII_VAR(struct ast_mwi_state *, mwi_state, NULL, ao2_cleanup);
RAII_VAR(struct stasis_message *, message, NULL, ao2_cleanup);
struct stasis_topic *mailbox_specific_topic;
struct ast_mwi_state *mwi_state;
struct stasis_message *message;
mwi_state = ast_mwi_create(mailbox, context);
if (!mwi_state) {
return -1;
return NULL;
}
mwi_state->new_msgs = new_msgs;
mwi_state->old_msgs = old_msgs;
if (!ast_strlen_zero(channel_id)) {
RAII_VAR(struct stasis_message *, chan_message,
stasis_cache_get(ast_channel_cache(),
ast_channel_snapshot_type(),
channel_id),
ao2_cleanup);
struct stasis_message *chan_message;
chan_message = stasis_cache_get(ast_channel_cache(), ast_channel_snapshot_type(),
channel_id);
if (chan_message) {
mwi_state->snapshot = stasis_message_data(chan_message);
ao2_ref(mwi_state->snapshot, +1);
}
ao2_cleanup(chan_message);
}
if (eid) {
@ -2860,16 +2875,34 @@ int ast_publish_mwi_state_full(
}
/*
* As far as stasis is concerned, all MWI events are internal.
* XXX As far as stasis is concerned, all MWI events are local.
*
* We may in the future want to make MWI aggregate internal/external
* We may in the future want to make MWI aggregate local/remote
* message counts similar to how device state aggregates state.
*/
message = stasis_message_create_full(ast_mwi_state_type(), mwi_state, &ast_eid_default);
ao2_cleanup(mwi_state);
return message;
}
int ast_publish_mwi_state_full(
const char *mailbox,
const char *context,
int new_msgs,
int old_msgs,
const char *channel_id,
struct ast_eid *eid)
{
struct ast_mwi_state *mwi_state;
RAII_VAR(struct stasis_message *, message, NULL, ao2_cleanup);
struct stasis_topic *mailbox_specific_topic;
message = mwi_state_create_message(mailbox, context, new_msgs, old_msgs, channel_id, eid);
if (!message) {
return -1;
}
mwi_state = stasis_message_data(message);
mailbox_specific_topic = ast_mwi_topic(mwi_state->uniqueid);
if (!mailbox_specific_topic) {
return -1;
@ -2880,6 +2913,54 @@ int ast_publish_mwi_state_full(
return 0;
}
int ast_delete_mwi_state_full(const char *mailbox, const char *context, struct ast_eid *eid)
{
RAII_VAR(struct stasis_message *, msg, NULL, ao2_cleanup);
struct stasis_message *cached_msg;
struct stasis_message *clear_msg;
struct ast_mwi_state *mwi_state;
struct stasis_topic *mailbox_specific_topic;
msg = mwi_state_create_message(mailbox, context, 0, 0, NULL, eid);
if (!msg) {
return -1;
}
mwi_state = stasis_message_data(msg);
/*
* XXX As far as stasis is concerned, all MWI events are local.
*
* For now, it is assumed that there is only one entity
* maintaining the state of a particular mailbox.
*
* If we ever have multiple MWI event entities maintaining
* the same mailbox that wish to delete their cached entry
* we will need to do something about the race condition
* potential between checking the cache and removing the
* cache entry.
*/
cached_msg = stasis_cache_get_by_eid(ast_mwi_state_cache(),
ast_mwi_state_type(), mwi_state->uniqueid, &ast_eid_default);
if (!cached_msg) {
/* Nothing to clear */
return -1;
}
ao2_cleanup(cached_msg);
mailbox_specific_topic = ast_mwi_topic(mwi_state->uniqueid);
if (!mailbox_specific_topic) {
return -1;
}
clear_msg = stasis_cache_clear_create(msg);
if (clear_msg) {
stasis_publish(mailbox_specific_topic, clear_msg);
}
ao2_cleanup(clear_msg);
return 0;
}
static const char *mwi_state_get_id(struct stasis_message *message)
{
if (ast_mwi_state_type() == stasis_message_type(message)) {

10
res/res_mwi_external.c
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@ -123,13 +123,13 @@ static void mwi_observe_delete(const void *obj)
{
const struct ast_mwi_mailbox_object *mailbox = obj;
if (!mailbox->msgs_new && !mailbox->msgs_old) {
/* No need to post a count clearing event. */
return;
if (mailbox->msgs_new || mailbox->msgs_old) {
/* Post a count clearing event. */
ast_publish_mwi_state(ast_sorcery_object_get_id(mailbox), NULL, 0, 0);
}
/* Post a count clearing event. */
ast_publish_mwi_state(ast_sorcery_object_get_id(mailbox), NULL, 0, 0);
/* Post a cache remove event. */
ast_delete_mwi_state(ast_sorcery_object_get_id(mailbox), NULL);
}
static const struct ast_sorcery_observer mwi_observers = {

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