static bool
mount_refresh (mount_t *self, server_t *server)
{
bool activity = false;
// Get latest snapshot and build a patches list for any changes
fmq_dir_t *latest = fmq_dir_new (self->location, NULL);
zlist_t *patches = fmq_dir_diff (self->dir, latest, self->alias);
// Drop old directory and replace with latest version
fmq_dir_destroy (&self->dir);
self->dir = latest;
// Copy new patches to clients' patches list
sub_t *sub = (sub_t *) zlist_first (self->subs);
while (sub) {
fmq_patch_t *patch = (fmq_patch_t *) zlist_first (patches);
while (patch) {
sub_patch_add (sub, patch);
patch = (fmq_patch_t *) zlist_next (patches);
activity = true;
}
sub = (sub_t *) zlist_next (self->subs);
}
// Destroy patches, they've all been copied
while (zlist_size (patches)) {
fmq_patch_t *patch = (fmq_patch_t *) zlist_pop (patches);
fmq_patch_destroy (&patch);
}
zlist_destroy (&patches);
return activity;
}
static void
mount_sub_store (mount_t *self, client_t *client, fmq_msg_t *request)
{
assert (self);
assert (self->subs);
// Store subscription along with any previous ones
// Coalesce subscriptions that are on same path
char *path = fmq_msg_path (request);
sub_t *sub = (sub_t *) zlist_first (self->subs);
while (sub) {
if (client == sub->client) {
// If old subscription is superset/same as new, ignore new
if (strncmp (path, sub->path, strlen (sub->path)) == 0)
return;
else
// If new subscription is superset of old one, remove old
if (strncmp (sub->path, path, strlen (path)) == 0) {
zlist_remove (self->subs, sub);
sub_destroy (&sub);
sub = (sub_t *) zlist_first (self->subs);
}
else
sub = (sub_t *) zlist_next (self->subs);
}
else
sub = (sub_t *) zlist_next (self->subs);
}
// New subscription for this client, append to our list
sub = sub_new (client, path, fmq_msg_cache (request));
zlist_append (self->subs, sub);
// If client requested resync, send full mount contents now
if (fmq_msg_options_number (client->request, "RESYNC", 0) == 1) {
zlist_t *patches = zdir_resync (self->dir, self->alias);
while (zlist_size (patches)) {
zdir_patch_t *patch = (zdir_patch_t *) zlist_pop (patches);
sub_patch_add (sub, patch);
zdir_patch_destroy (&patch);
}
zlist_destroy (&patches);
}
}