static int
s_new_slave (zloop_t *loop, zmq_pollitem_t *unused, void *args)
{
clonesrv_t *self = (clonesrv_t *) args;
zhash_destroy (&self->kvmap);
self->master = FALSE;
self->slave = TRUE;
zmq_pollitem_t poller = { self->subscriber, 0, ZMQ_POLLIN };
zloop_poller (bstar_zloop (self->bstar), &poller, s_subscriber, self);
return 0;
}
static int
s_new_passive (zloop_t *loop, zmq_pollitem_t *unused, void *args)
{
clonesrv_t *self = (clonesrv_t *) args;
zhash_destroy (&self->kvmap);
self->active = false;
self->passive = true;
// Start subscribing to updates
zmq_pollitem_t poller = { self->subscriber, 0, ZMQ_POLLIN };
zloop_poller (bstar_zloop (self->bstar), &poller, s_subscriber, self);
return 0;
}
static int
s_new_master (zloop_t *loop, zmq_pollitem_t *unused, void *args)
{
clonesrv_t *self = (clonesrv_t *) args;
self->master = TRUE;
self->slave = FALSE;
zmq_pollitem_t poller = { self->subscriber, 0, ZMQ_POLLIN };
zloop_poller_end (bstar_zloop (self->bstar), &poller);
// Apply pending list to own hash table
while (zlist_size (self->pending)) {
kvmsg_t *kvmsg = (kvmsg_t *) zlist_pop (self->pending);
kvmsg_set_sequence (kvmsg, ++self->sequence);
kvmsg_send (kvmsg, self->publisher);
kvmsg_store (&kvmsg, self->kvmap);
zclock_log ("I: publishing pending=%d", (int) self->sequence);
}
return 0;
}
int main (int argc, char *argv [])
{
clonesrv_t *self = (clonesrv_t *) zmalloc (sizeof (clonesrv_t));
if (argc == 2 && streq (argv [1], "-p")) {
zclock_log ("I: primary active, waiting for backup (passive)");
self->bstar = bstar_new (BSTAR_PRIMARY, "tcp://*:5003",
"tcp://localhost:5004");
bstar_voter (self->bstar, "tcp://*:5556",
ZMQ_ROUTER, s_snapshots, self);
self->port = 5556;
self->peer = 5566;
self->primary = true;
}
else
if (argc == 2 && streq (argv [1], "-b")) {
zclock_log ("I: backup passive, waiting for primary (active)");
self->bstar = bstar_new (BSTAR_BACKUP, "tcp://*:5004",
"tcp://localhost:5003");
bstar_voter (self->bstar, "tcp://*:5566",
ZMQ_ROUTER, s_snapshots, self);
self->port = 5566;
self->peer = 5556;
self->primary = false;
}
else {
printf ("Usage: clonesrv4 { -p | -b }\n");
free (self);
exit (0);
}
// Primary server will become first active
if (self->primary)
self->kvmap = zhash_new ();
self->ctx = zctx_new ();
self->pending = zlist_new ();
bstar_set_verbose (self->bstar, true);
// Set up our clone server sockets
self->publisher = zsocket_new (self->ctx, ZMQ_PUB);
self->collector = zsocket_new (self->ctx, ZMQ_SUB);
zsocket_set_subscribe (self->collector, "");
zsocket_bind (self->publisher, "tcp://*:%d", self->port + 1);
zsocket_bind (self->collector, "tcp://*:%d", self->port + 2);
// Set up our own clone client interface to peer
self->subscriber = zsocket_new (self->ctx, ZMQ_SUB);
zsocket_set_subscribe (self->subscriber, "");
zsocket_connect (self->subscriber,
"tcp://localhost:%d", self->peer + 1);
// .split main task body
// After we've setup our sockets, we register our binary star
// event handlers, and then start the bstar reactor. This finishes
// when the user presses Ctrl-C or when the process receives a SIGINT
// interrupt:
// Register state change handlers
bstar_new_active (self->bstar, s_new_active, self);
bstar_new_passive (self->bstar, s_new_passive, self);
// Register our other handlers with the bstar reactor
zmq_pollitem_t poller = { self->collector, 0, ZMQ_POLLIN };
zloop_poller (bstar_zloop (self->bstar), &poller, s_collector, self);
zloop_timer (bstar_zloop (self->bstar), 1000, 0, s_flush_ttl, self);
zloop_timer (bstar_zloop (self->bstar), 1000, 0, s_send_hugz, self);
// Start the bstar reactor
bstar_start (self->bstar);
// Interrupted, so shut down
while (zlist_size (self->pending)) {
kvmsg_t *kvmsg = (kvmsg_t *) zlist_pop (self->pending);
kvmsg_destroy (&kvmsg);
}
zlist_destroy (&self->pending);
bstar_destroy (&self->bstar);
zhash_destroy (&self->kvmap);
zctx_destroy (&self->ctx);
free (self);
return 0;
}
int main (int argc, char *argv [])
{
clonesrv_t *self = (clonesrv_t *) zmalloc (sizeof (clonesrv_t));
if (argc == 2 && streq (argv [1], "-p")) {
zclock_log ("I: primary master, waiting for backup (slave)");
self->bstar = bstar_new (BSTAR_PRIMARY, "tcp://*:5003",
"tcp://localhost:5004");
bstar_voter (self->bstar, "tcp://*:5556", ZMQ_ROUTER, s_snapshots, self);
self->port = 5556;
self->peer = 5566;
self->primary = TRUE;
}
else
if (argc == 2 && streq (argv [1], "-b")) {
zclock_log ("I: backup slave, waiting for primary (master)");
self->bstar = bstar_new (BSTAR_BACKUP, "tcp://*:5004",
"tcp://localhost:5003");
bstar_voter (self->bstar, "tcp://*:5566", ZMQ_ROUTER, s_snapshots, self);
self->port = 5566;
self->peer = 5556;
self->primary = FALSE;
}
else {
printf ("Usage: clonesrv4 { -p | -b }\n");
free (self);
exit (0);
}
// Primary server will become first master
if (self->primary)
self->kvmap = zhash_new ();
self->ctx = zctx_new ();
self->pending = zlist_new ();
bstar_set_verbose (self->bstar, TRUE);
// Set up our clone server sockets
self->publisher = zsocket_new (self->ctx, ZMQ_PUB);
self->collector = zsocket_new (self->ctx, ZMQ_SUB);
zsockopt_set_subscribe (self->collector, "");
zsocket_bind (self->publisher, "tcp://*:%d", self->port + 1);
zsocket_bind (self->collector, "tcp://*:%d", self->port + 2);
// Set up our own clone client interface to peer
self->subscriber = zsocket_new (self->ctx, ZMQ_SUB);
zsockopt_set_subscribe (self->subscriber, "");
zsocket_connect (self->subscriber, "tcp://localhost:%d", self->peer + 1);
// Register state change handlers
bstar_new_master (self->bstar, s_new_master, self);
bstar_new_slave (self->bstar, s_new_slave, self);
// Register our other handlers with the bstar reactor
zmq_pollitem_t poller = { self->collector, 0, ZMQ_POLLIN };
zloop_poller (bstar_zloop (self->bstar), &poller, s_collector, self);
zloop_timer (bstar_zloop (self->bstar), 1000, 0, s_flush_ttl, self);
zloop_timer (bstar_zloop (self->bstar), 1000, 0, s_send_hugz, self);
// Start the Bstar reactor
bstar_start (self->bstar);
// Interrupted, so shut down
while (zlist_size (self->pending)) {
kvmsg_t *kvmsg = (kvmsg_t *) zlist_pop (self->pending);
kvmsg_destroy (&kvmsg);
}
zlist_destroy (&self->pending);
bstar_destroy (&self->bstar);
zhash_destroy (&self->kvmap);
zctx_destroy (&self->ctx);
free (self);
return 0;
}