ngx_int_t update_subscriber_last_msg_id(subscriber_t *sub, nchan_msg_t *msg) {
if(msg) {
char *err, *huh;
if(verify_msg_id(&sub->last_msgid, &msg->prev_id, &msg->id, &err) == NGX_ERROR) {
struct timeval tv;
time_t time;
int ttl = msg->expires - msg->id.time;
ngx_gettimeofday(&tv);
time = tv.tv_sec;
if(sub->last_msgid.time + ttl <= time) {
huh = "The message probably expired.";
}
else {
huh = "Try increasing the message buffer length.";
}
if(sub->type == INTERNAL) {
nchan_log_warning("Missed message for internal %V subscriber: %s. %s", sub->name, err, huh);
}
else {
nchan_log_request_warning(sub->request, "Missed message for %V subscriber: %s. %s", sub->name, err, huh);
}
}
nchan_update_multi_msgid(&sub->last_msgid, &msg->id, NULL);
}
return NGX_OK;
}
ngx_int_t update_subscriber_last_msg_id(subscriber_t *sub, nchan_msg_t *msg) {
if(msg) {
if(verify_msg_id(&sub->last_msgid, &msg->prev_id, &msg->id) == NGX_ERROR) {
struct timeval tv;
time_t time;
int ttl = msg->expires - msg->id.time;
ngx_gettimeofday(&tv);
time = tv.tv_sec;
if(sub->last_msgid.time + ttl <= time) {
ERR("missed a message because it probably expired");
}
else {
ERR("missed a message for an unknown reason. Maybe it's a bug or maybe the message queue length is too small.");
}
}
nchan_update_multi_msgid(&sub->last_msgid, &msg->id, NULL);
}
return NGX_OK;
}
ngx_int_t update_subscriber_last_msg_id(subscriber_t *sub, nchan_msg_t *msg) {
if(msg) {
if(verify_msg_id(&sub->last_msgid, &msg->prev_id, &msg->id) == NGX_ERROR) {
struct timeval tv;
time_t time;
int ttl = msg->expires - msg->id.time;
ngx_gettimeofday(&tv);
time = tv.tv_sec;
if(sub->last_msgid.time + ttl <= time) {
ERR("missed a message because it probably expired");
}
else {
ERR("missed a message for an unknown reason. That's bad! Stop everything!");
assert(0);
}
}
nchan_update_multi_msgid(&sub->last_msgid, &msg->id);
}
return NGX_OK;
}
static ngx_int_t spool_nextmsg(subscriber_pool_t *spool, nchan_msg_id_t *new_last_id) {
subscriber_pool_t *newspool;
channel_spooler_t *spl = spool->spooler;
ngx_int_t immortal_spool = spool->id.time == NCHAN_NEWEST_MSGID_TIME;
int16_t largetags[NCHAN_MULTITAG_MAX];
nchan_msg_id_t new_id = NCHAN_ZERO_MSGID;
nchan_copy_msg_id(&new_id, &spool->id, largetags);
nchan_update_multi_msgid(&new_id, new_last_id, largetags);
//ERR("spool %p nextmsg (%V) --", spool, msgid_to_str(&spool->id));
//ERR(" -- update with (%V) --", msgid_to_str(new_last_id));
//ERR(" -- newid %V", msgid_to_str(&new_id));
if(msg_ids_equal(&spool->id, &new_id)) {
ERR("nextmsg id same as curmsg (%V)", msgid_to_str(&spool->id));
assert(0);
}
else {
newspool = !immortal_spool ? find_spool(spl, &new_id) : get_spool(spl, &new_id);
if(newspool != NULL) {
assert(spool != newspool);
spool_transfer_subscribers(spool, newspool, 0);
if(!immortal_spool) destroy_spool(spool);
}
else {
ngx_rbtree_node_t *node;
assert(!immortal_spool);
node = rbtree_node_from_data(spool);
rbtree_remove_node(&spl->spoolseed, node);
nchan_copy_msg_id(&spool->id, &new_id, NULL);
rbtree_insert_node(&spl->spoolseed, node);
spool->msg_status = MSG_INVALID;
spool->msg = NULL;
newspool = spool;
/*
newspool = get_spool(spl, &new_id);
assert(spool != newspool);
spool_transfer_subscribers(spool, newspool, 0);
destroy_spool(spool);
*/
}
if(newspool->non_internal_sub_count > 0 && spl->handlers->bulk_post_subscribe != NULL) {
spl->handlers->bulk_post_subscribe(spl, newspool->non_internal_sub_count, spl->handlers_privdata);
}
if(newspool->sub_count > 0) {
switch(newspool->msg_status) {
case MSG_CHANNEL_NOTREADY:
newspool->msg_status = MSG_INVALID;
case MSG_INVALID:
spool_fetch_msg(newspool);
break;
case MSG_EXPECTED:
spool_respond_general(newspool, NULL, NGX_HTTP_NO_CONTENT, NULL, 0);
break;
default:
break;
}
}
}
return NGX_OK;
}