static int
s_subscriber (zloop_t *loop, zmq_pollitem_t *poller, void *args)
{
clonesrv_t *self = (clonesrv_t *) args;
// Get state snapshot if necessary
if (self->kvmap == NULL) {
self->kvmap = zhash_new ();
void *snapshot = zsocket_new (self->ctx, ZMQ_DEALER);
zsocket_connect (snapshot, "tcp://localhost:%d", self->peer);
zclock_log ("I: asking for snapshot from: tcp://localhost:%d",
self->peer);
zstr_sendm (snapshot, "ICANHAZ?");
zstr_send (snapshot, ""); // blank subtree to get all
while (true) {
kvmsg_t *kvmsg = kvmsg_recv (snapshot);
if (!kvmsg)
break; // Interrupted
if (streq (kvmsg_key (kvmsg), "KTHXBAI")) {
self->sequence = kvmsg_sequence (kvmsg);
kvmsg_destroy (&kvmsg);
break; // Done
}
kvmsg_store (&kvmsg, self->kvmap);
}
zclock_log ("I: received snapshot=%d", (int) self->sequence);
zsocket_destroy (self->ctx, snapshot);
}
// Find and remove update off pending list
kvmsg_t *kvmsg = kvmsg_recv (poller->socket);
if (!kvmsg)
return 0;
if (strneq (kvmsg_key (kvmsg), "HUGZ")) {
if (!s_was_pending (self, kvmsg)) {
// If active update came before client update, flip it
// around, store active update (with sequence) on pending
// list and use to clear client update when it comes later
zlist_append (self->pending, kvmsg_dup (kvmsg));
}
// If update is more recent than our kvmap, apply it
if (kvmsg_sequence (kvmsg) > self->sequence) {
self->sequence = kvmsg_sequence (kvmsg);
kvmsg_store (&kvmsg, self->kvmap);
zclock_log ("I: received update=%d", (int) self->sequence);
}
else
kvmsg_destroy (&kvmsg);
}
else
kvmsg_destroy (&kvmsg);
return 0;
}
static void
state_manager (void *args, zctx_t *ctx, void *pipe)
{
zhash_t *kvmap = zhash_new ();
zstr_send (pipe, "READY");
void *snapshot = zsocket_new (ctx, ZMQ_ROUTER);
zsocket_bind (snapshot, "tcp://*:5556");
zmq_pollitem_t items [] = {
{ pipe, 0, ZMQ_POLLIN, 0 },
{ snapshot, 0, ZMQ_POLLIN, 0 }
};
int64_t sequence = 0; // Current snapshot version number
while (!zctx_interrupted) {
int rc = zmq_poll (items, 2, -1);
if (rc == -1 && errno == ETERM)
break; // Context has been shut down
// Apply state update from main thread
if (items [0].revents & ZMQ_POLLIN) {
kvmsg_t *kvmsg = kvmsg_recv (pipe);
if (!kvmsg)
break; // Interrupted
sequence = kvmsg_sequence (kvmsg);
kvmsg_store (&kvmsg, kvmap);
}
// Execute state snapshot request
if (items [1].revents & ZMQ_POLLIN) {
zframe_t *identity = zframe_recv (snapshot);
if (!identity)
break; // Interrupted
// Request is in second frame of message
char *request = zstr_recv (snapshot);
if (streq (request, "ICANHAZ?"))
free (request);
else {
printf ("E: bad request, aborting\n");
break;
}
// Send state snapshot to client
kvroute_t routing = { snapshot, identity };
// For each entry in kvmap, send kvmsg to client
zhash_foreach (kvmap, s_send_single, &routing);
// Now send END message with sequence number
printf ("Sending state shapshot=%d\n", (int) sequence);
zframe_send (&identity, snapshot, ZFRAME_MORE);
kvmsg_t *kvmsg = kvmsg_new (sequence);
kvmsg_set_key (kvmsg, "KTHXBAI");
kvmsg_set_body (kvmsg, (byte *) "", 0);
kvmsg_send (kvmsg, snapshot);
kvmsg_destroy (&kvmsg);
}
}
zhash_destroy (&kvmap);
}
static int collabclient_sessionJoin_processmsg_foreach_fn( kvmsg_t* msg, void *argument )
{
cloneclient_t* cc = (cloneclient_t*)argument;
printf("processmsg_foreach() seq:%ld\n", kvmsg_sequence (msg) );
int create = 1;
zeromq_subscriber_process_update( cc, msg, create );
return 0;
}
/**
* We call this function for each key-value pair in our hash table
*/
static int
s_send_single (const char *key, void *data, void *args)
{
kvroute_t *kvroute = (kvroute_t *) args;
kvmsg_t *kvmsg = (kvmsg_t *) data;
DEBUG ("I: s_send_single %"PRId64" type:%s", kvmsg_sequence(kvmsg), kvmsg_get_prop (kvmsg, "type") );
if (strlen (kvroute->subtree) <= strlen (kvmsg_key (kvmsg))
&& memcmp (kvroute->subtree,
kvmsg_key (kvmsg), strlen (kvroute->subtree)) == 0) {
zframe_send (&kvroute->identity, // Choose recipient
kvroute->socket, ZFRAME_MORE + ZFRAME_REUSE);
kvmsg_send (kvmsg, kvroute->socket);
}
return 0;
}
/**
* A callback function that should be invoked when there is input in
* the zeromq fd zeromq_fd. The collabclient is taken as the user data
* pointer.
*
* Add this callback using GDrawAddReadFD()
*/
static void zeromq_subscriber_fd_callback(int zeromq_fd, void* datas )
{
cloneclient_t* cc = (cloneclient_t*)datas;
// printf("zeromq_subscriber_fd_callback(1)\n");
int opt = 0;
size_t optsz = sizeof(int);
zmq_getsockopt( cc->subscriber, ZMQ_EVENTS, &opt, &optsz );
if( opt & ZMQ_POLLIN )
{
printf("zeromq_subscriber_fd_callback() have message! cc:%p\n",cc);
while( 1 )
{
kvmsg_t *kvmsg = kvmsg_recv_full (cc->subscriber, ZMQ_DONTWAIT);
if (kvmsg)
{
int64_t msgseq = kvmsg_sequence (kvmsg);
// Discard out-of-sequence kvmsgs, incl. heartbeats
if ( msgseq > cc->sequence)
{
int create = 1;
zeromq_subscriber_process_update( cc, kvmsg, create );
kvmsg_store (&kvmsg, cc->kvmap);
printf ("I: received update=%d\n", (int) cc->sequence);
}
else
{
kvmsg_destroy (&kvmsg);
}
}
else
break;
}
}
}
/**
* Process the given kvmsg from the server. If create is set and we do
* not have any charview for a changed glyph then we first create a
* charview for it. This allows the updates from a server to be
* processed at startup time, getting us up to speed with any glyphs
* that have changed.
*
* This function is mainly called in response to an update which is
* published from the server. However, in sessionJoin() we also call
* here to handle the incremental updates to glyphs that have occurred
* after the SFD was sent to the server.
*/
static void zeromq_subscriber_process_update( cloneclient_t* cc, kvmsg_t *kvmsg, int create )
{
cc->sequence = kvmsg_sequence (kvmsg);
if( cc->sequence >= cc->roundTripTimerWaitingSeq )
cc->roundTripTimerWaitingSeq = 0;
char* uuid = kvmsg_get_prop (kvmsg, "uuid" );
byte* data = kvmsg_body (kvmsg);
size_t data_size = kvmsg_size (kvmsg);
printf("cc process_update() uuid:%s\n", uuid );
FontView* fv = FontViewFind( FontViewFind_byXUIDConnected, uuid );
printf("fv:%p\n", fv );
if( fv )
{
if( !data_size )
{
printf("WARNING: zero length message!\n" );
return;
}
SplineFont *sf = fv->b.sf;
if( !sf )
{
printf("ERROR: font view does not have the splinefont set!\n" );
return;
}
char* pos = kvmsg_get_prop (kvmsg, "pos" );
char* name = kvmsg_get_prop (kvmsg, "name" );
printf("pos:%s\n", pos );
// SplineChar *sc = sf->glyphs[ atoi(pos) ];
SplineChar* sc = SFGetOrMakeChar( sf, -1, name );
printf("sc:%p\n", sc );
if( !sc )
{
printf("WARNING: font view does not have a glyph for pos:%s\n", pos );
printf("WARNING: font view does not have a glyph for name:%s\n", name );
return;
}
printf("sc.name:%s\n", sc->name );
printf("data.size:%ld\n", data_size );
if( DEBUG_SHOW_SFD_CHUNKS )
printf("data:%s\n", data );
int current_layer = 0;
if( !sc->views && create )
{
int show = 0;
CharView* cv = CharViewCreateExtended( sc, fv, -1, show );
printf("created charview:%p\n", cv );
}
for( CharViewBase* cv = sc->views; cv; cv = cv->next )
{
printf("have charview:%p\n", cv );
char filename[PATH_MAX];
snprintf(filename, PATH_MAX, "%s/fontforge-collab-inx-%d.sfd", getTempDir(), getpid() );
GFileWriteAll( filename, (char*)data);
FILE* file = fopen( filename, "rb" );
Undoes* undo = SFDGetUndo( sf, file, sc,
"UndoOperation",
"EndUndoOperation",
current_layer );
fclose(file);
if( !undo )
{
printf("***** ERROR ****** reading back undo instance!\n");
printf("data: %s\n\n", data );
}
if( undo )
{
// NOT HANDLED!
if( undo->undotype == ut_statehint )
{
printf("*** warning ut_statehint not handled\n");
break;
}
printf("________________________ READ undo.layer: %d dm:%d layer_sz:%d\n",
undo->layer, cv->drawmode, cv->sc->layer_cnt );
int selectedlayer = cv->drawmode;
if( undo->layer != UNDO_LAYER_UNKNOWN )
selectedlayer = undo->layer;
// use oldlayer to store current setting and switch to the
// selected layer for this block.
int oldlayer = cv->drawmode;
cv->drawmode = selectedlayer;
undo->next = 0;
undo->next = cv->layerheads[selectedlayer]->redoes;
cv->layerheads[selectedlayer]->redoes = undo;
CVDoRedo( cv );
char* isLocalUndo = kvmsg_get_prop (kvmsg, "isLocalUndo" );
if( isLocalUndo )
{
if( isLocalUndo[0] == '1' )
{
Undoes* undo = cv->layerheads[selectedlayer]->undoes;
if( undo )
{
cv->layerheads[selectedlayer]->undoes = undo->next;
undo->next = cv->layerheads[selectedlayer]->redoes;
cv->layerheads[selectedlayer]->redoes = undo;
}
}
}
if( cv->drawmode != oldlayer )
{
cv->drawmode = oldlayer;
CVCharChangedUpdate( cv );
}
}
break;
}
}
printf ("I: processed update=%d\n", (int) cc->sequence);
}
int main (void)
{
// Prepare our context and subscriber
zctx_t *ctx = zctx_new ();
void *snapshot = zsocket_new (ctx, ZMQ_DEALER);
zsocket_connect (snapshot, "tcp://localhost:5556");
void *subscriber = zsocket_new (ctx, ZMQ_SUB);
zsockopt_set_subscribe (subscriber, "");
zsocket_connect (subscriber, "tcp://localhost:5557");
void *publisher = zsocket_new (ctx, ZMQ_PUSH);
zsocket_connect (publisher, "tcp://localhost:5558");
zhash_t *kvmap = zhash_new ();
srandom ((unsigned) time (NULL));
// Get state snapshot
int64_t sequence = 0;
zstr_send (snapshot, "ICANHAZ?");
while (TRUE) {
kvmsg_t *kvmsg = kvmsg_recv (snapshot);
if (!kvmsg)
break; // Interrupted
if (streq (kvmsg_key (kvmsg), "KTHXBAI")) {
sequence = kvmsg_sequence (kvmsg);
printf ("I: received snapshot=%d\n", (int) sequence);
kvmsg_destroy (&kvmsg);
break; // Done
}
kvmsg_store (&kvmsg, kvmap);
}
int64_t alarm = zclock_time () + 1000;
while (!zctx_interrupted) {
zmq_pollitem_t items [] = { { subscriber, 0, ZMQ_POLLIN, 0 } };
int tickless = (int) ((alarm - zclock_time ()));
if (tickless < 0)
tickless = 0;
int rc = zmq_poll (items, 1, tickless * ZMQ_POLL_MSEC);
if (rc == -1)
break; // Context has been shut down
if (items [0].revents & ZMQ_POLLIN) {
kvmsg_t *kvmsg = kvmsg_recv (subscriber);
if (!kvmsg)
break; // Interrupted
// Discard out-of-sequence kvmsgs, incl. heartbeats
if (kvmsg_sequence (kvmsg) > sequence) {
sequence = kvmsg_sequence (kvmsg);
kvmsg_store (&kvmsg, kvmap);
printf ("I: received update=%d\n", (int) sequence);
}
else
kvmsg_destroy (&kvmsg);
}
// If we timed-out, generate a random kvmsg
if (zclock_time () >= alarm) {
kvmsg_t *kvmsg = kvmsg_new (0);
kvmsg_fmt_key (kvmsg, "%d", randof (10000));
kvmsg_fmt_body (kvmsg, "%d", randof (1000000));
kvmsg_send (kvmsg, publisher);
kvmsg_destroy (&kvmsg);
alarm = zclock_time () + 1000;
}
}
printf (" Interrupted\n%d messages in\n", (int) sequence);
zhash_destroy (&kvmap);
zctx_destroy (&ctx);
return 0;
}
int main (void)
{
// Prepare our context and subscriber
void *context = zmq_init (1);
void *subscriber = zmq_socket (context, ZMQ_SUB);
zmq_setsockopt (subscriber, ZMQ_SUBSCRIBE, "", 0);
zmq_connect (subscriber, "tcp://localhost:5556");
void *snapshot = zmq_socket (context, ZMQ_XREQ);
zmq_connect (snapshot, "tcp://localhost:5557");
void *updates = zmq_socket (context, ZMQ_PUSH);
zmq_connect (updates, "tcp://localhost:5558");
s_catch_signals ();
zhash_t *kvmap = zhash_new ();
srandom ((unsigned) time (NULL));
// Get state snapshot
int64_t sequence = 0;
s_send (snapshot, "I can haz state?");
while (!s_interrupted) {
kvmsg_t *kvmsg = kvmsg_recv (snapshot);
if (!kvmsg)
break; // Interrupted
if (streq (kvmsg_key (kvmsg), "KTHXBAI")) {
sequence = kvmsg_sequence (kvmsg);
kvmsg_destroy (&kvmsg);
break; // Done
}
kvmsg_store (&kvmsg, kvmap);
}
printf ("I: received snapshot=%" PRId64 "\n", sequence);
int zero = 0;
zmq_setsockopt (snapshot, ZMQ_LINGER, &zero, sizeof (zero));
zmq_close (snapshot);
int64_t alarm = s_clock () + 1000;
while (!s_interrupted) {
zmq_pollitem_t items [] = { { subscriber, 0, ZMQ_POLLIN, 0 } };
int tickless = (int) ((alarm - s_clock ()));
if (tickless < 0)
tickless = 0;
int rc = zmq_poll (items, 1, tickless * 1000);
if (rc == -1)
break; // Context has been shut down
if (items [0].revents & ZMQ_POLLIN) {
kvmsg_t *kvmsg = kvmsg_recv (subscriber);
if (!kvmsg)
break; // Interrupted
// Discard out-of-sequence kvmsgs, incl. heartbeats
if (kvmsg_sequence (kvmsg) > sequence) {
sequence = kvmsg_sequence (kvmsg);
kvmsg_store (&kvmsg, kvmap);
printf ("I: received update=%" PRId64 "\n", sequence);
}
else
kvmsg_destroy (&kvmsg);
}
// If we timed-out, generate a random kvmsg
if (s_clock () >= alarm) {
kvmsg_t *kvmsg = kvmsg_new (0);
kvmsg_fmt_key (kvmsg, "%d", randof (10000));
kvmsg_fmt_body (kvmsg, "%d", randof (1000000));
kvmsg_send (kvmsg, updates);
kvmsg_destroy (&kvmsg);
alarm = s_clock () + 1000;
}
}
zhash_destroy (&kvmap);
printf (" Interrupted\n%" PRId64 " messages in\n", sequence);
zmq_setsockopt (updates, ZMQ_LINGER, &zero, sizeof (zero));
zmq_close (updates);
zmq_close (subscriber);
zmq_term (context);
return 0;
}
FontViewBase* collabclient_sessionJoin( void* ccvp, FontView *fv )
{
FontViewBase* ret = 0;
#ifdef BUILD_COLLAB
cloneclient_t* cc = (cloneclient_t*)ccvp;
printf("collabclient_sessionJoin(top)\n");
// Get state snapshot
cc->sequence = 0;
zstr_sendm (cc->snapshot, "ICANHAZ?");
zstr_send (cc->snapshot, SUBTREE);
// if we wait for timeoutMS millisec then we assume failure
// timeWaitedMS is used to keep track of how long we have waited
kvmsg_t* lastSFD = 0;
int timeWaitedMS = 0;
int timeoutMS = pref_collab_sessionJoinTimeoutMS;
while (true)
{
printf("timeoutMS:%d timeWaitedMS:%d\n", timeoutMS, timeWaitedMS );
if( timeWaitedMS >= timeoutMS )
{
char* addrport = collabclient_makeAddressString( cc->address, cc->port );
gwwv_post_error(_("FontForge Collaboration"),
_("Failed to connect to server session at %s"),
addrport );
return 0;
}
kvmsg_t *kvmsg = kvmsg_recv_full( cc->snapshot, ZMQ_DONTWAIT );
if (!kvmsg)
{
int msToWait = 50;
g_usleep( msToWait * 1000 );
timeWaitedMS += msToWait;
continue;
}
/* kvmsg_t *kvmsg = kvmsg_recv (cc->snapshot); */
/* if (!kvmsg) */
/* break; // Interrupted */
if (streq (kvmsg_key (kvmsg), "KTHXBAI")) {
cc->sequence = kvmsg_sequence (kvmsg);
printf ("I: received snapshot=%d\n", (int) cc->sequence);
kvmsg_destroy (&kvmsg);
// Done
break;
}
printf ("I: storing seq=%ld ", kvmsg_sequence (kvmsg));
if( kvmsg_get_prop (kvmsg, "type") )
printf(" type:%s", kvmsg_get_prop (kvmsg, "type") );
printf ("\n");
if( !strcmp(kvmsg_get_prop (kvmsg, "type"), MSG_TYPE_SFD ))
{
if( !lastSFD ||
kvmsg_sequence (kvmsg) > kvmsg_sequence (lastSFD))
{
lastSFD = kvmsg;
}
size_t data_size = kvmsg_size(lastSFD);
printf("data_size:%ld\n", data_size );
}
kvmsg_store (&kvmsg, cc->kvmap);
}
printf("collabclient_sessionJoin(done with netio getting snapshot)\n");
printf("collabclient_sessionJoin() lastSFD:%p\n", lastSFD );
// int rc = 0;
// void* out = 0;
// rc = zhash_foreach ( cc->kvmap, collabclient_sessionJoin_findSFD_foreach_fn, &out );
// printf("collabclient_sessionJoin() last sfd:%p\n", out );
if( !lastSFD )
{
gwwv_post_error(_("FontForge Collaboration"), _("No Font Snapshot received from the server"));
return 0;
}
if( lastSFD )
{
int openflags = 0;
char filename[PATH_MAX];
snprintf(filename, PATH_MAX, "%s/fontforge-collab-import-%d.sfd",getTempDir(),getpid());
GFileWriteAll( filename, kvmsg_body (lastSFD) );
/*
* Since we are creating a new fontview window for the collab session
* we "hand over" the collabClient from the current fontview used to join
* the session to the fontview which owns the sfd from the wire.
*/
FontViewBase* newfv = ViewPostScriptFont( filename, openflags );
newfv->collabClient = cc;
fv->b.collabClient = 0;
newfv->collabState = cs_client;
FVTitleUpdate( newfv );
collabclient_notifySessionJoining( cc, newfv );
ret = newfv;
/* cloneclient_t* newc = collabclient_new( cc->address, cc->port ); */
/* collabclient_sessionJoin( newc, fv ); */
}
printf("applying updates from server that were performed after the SFD snapshot was done...\n");
kvmap_visit( cc->kvmap, kvmsg_sequence (lastSFD),
collabclient_sessionJoin_processmsg_foreach_fn, cc );
/* struct collabclient_sessionJoin_processUpdates_foreach_args args; */
/* args.cc = cc; */
/* args.lastSFD = lastSFD; */
/* rc = zhash_foreach ( cc->kvmap, collabclient_sessionJoin_processUpdates_foreach_fn, &args ); */
printf("collabclient_sessionJoin(complete)\n");
#endif
return ret;
}
