1 #include "opensrf/osrf_app_session.h"
4 /* the global app_session cache */
5 osrf_app_session* app_session_cache;
9 // --------------------------------------------------------------------------
10 // --------------------------------------------------------------------------
12 // --------------------------------------------------------------------------
14 /** Allocation and initializes a new app_request object */
15 osrf_app_request* _osrf_app_request_init(
16 osrf_app_session* session, osrf_message* msg ) {
18 osrf_app_request* req =
19 (osrf_app_request*) safe_malloc(sizeof(osrf_app_request));
21 req->session = session;
22 req->request_id = msg->thread_trace;
31 /** Frees memory used by an app_request object */
32 void _osrf_app_request_free( osrf_app_request * req ){
33 if( req == NULL ) return;
36 osrf_message_free( req->payload );
39 osrf_message* cur_msg = req->result;
40 while( cur_msg != NULL ) {
41 osrf_message* next_msg = cur_msg->next;
42 osrf_message_free( cur_msg );
45 osrf_message_free( req->payload );
51 /** Pushes the given message onto the list of 'responses' to this request */
52 void _osrf_app_request_push_queue( osrf_app_request* req, osrf_message* result ){
53 if(req == NULL || result == NULL) return;
54 debug_handler( "App Session pushing [%d] onto request queue", result->thread_trace );
55 if(req->result == NULL)
58 result->next = req->result;
63 /** Removes this app_request from our session request set */
64 void osrf_app_session_request_finish(
65 osrf_app_session* session, int req_id ){
67 if(session == NULL) return;
68 osrf_app_request* req = _osrf_app_session_get_request( session, req_id );
69 if(req == NULL) return;
70 _osrf_app_session_remove_request( req->session, req );
71 _osrf_app_request_free( req );
74 /** Checks the receive queue for messages. If any are found, the first
75 * is popped off and returned. Otherwise, this method will wait at most timeout
76 * seconds for a message to appear in the receive queue. Once it arrives it is returned.
77 * If no messages arrive in the timeout provided, null is returned.
79 osrf_message* _osrf_app_request_recv( osrf_app_request* req, int timeout ) {
81 if(req == NULL) return NULL;
83 if( req->result != NULL ) {
84 debug_handler("app_request receive already has a message, returning it");
85 /* pop off the first message in the list */
86 osrf_message* tmp_msg = req->result->next;
87 req->result = tmp_msg;
91 time_t start = time(NULL);
92 time_t remaining = (time_t) timeout;
94 while( remaining >= 0 ) {
95 /* tell the session to wait for stuff */
96 debug_handler( "In app_request receive with remaining time [%d]", (int) remaining );
98 osrf_app_session_queue_wait( req->session, 0 );
100 if( req->result != NULL ) { /* if we received anything */
101 /* pop off the first message in the list */
102 debug_handler( "app_request_recv received a message, returning it");
103 osrf_message* ret_msg = req->result;
104 osrf_message* tmp_msg = ret_msg->next;
105 req->result = tmp_msg;
112 osrf_app_session_queue_wait( req->session, (int) remaining );
114 if( req->result != NULL ) { /* if we received anything */
115 /* pop off the first message in the list */
116 debug_handler( "app_request_recv received a message, returning it");
117 osrf_message* ret_msg = req->result;
118 osrf_message* tmp_msg = ret_msg->next;
119 req->result = tmp_msg;
125 remaining -= (int) (time(NULL) - start);
131 /** Resend this requests original request message */
132 int _osrf_app_request_resend( osrf_app_request* req ) {
133 if(req == NULL) return 0;
135 debug_handler( "Resending request [%d]", req->request_id );
136 return _osrf_app_session_send( req->session, req->payload );
143 // --------------------------------------------------------------------------
144 // --------------------------------------------------------------------------
146 // --------------------------------------------------------------------------
148 /** returns a session from the global session hash */
149 osrf_app_session* osrf_app_session_find_session( char* session_id ) {
150 osrf_app_session* ptr = app_session_cache;
151 debug_handler("Searching for session in global cache with id [%s]", session_id );
152 while( ptr != NULL ) {
153 if( !strcmp(ptr->session_id,session_id) )
161 /** adds a session to the global session cache */
162 void _osrf_app_session_push_session( osrf_app_session* session ) {
164 if( app_session_cache == NULL ) {
165 app_session_cache = session;
169 osrf_app_session* ptr = app_session_cache;
170 debug_handler( "Pushing [%s] [%s] onto global session cache",
171 session->remote_service, session->session_id );
172 while( ptr != NULL ) {
173 if( !strcmp(ptr->session_id, session->session_id) )
175 if( ptr->next == NULL ) {
184 /** unlinks from global session cache */
185 void _osrf_app_session_remove_session( char* session_id ) {
187 if( app_session_cache == NULL )
190 debug_handler( "App Session removing session [%s] from global cache", session_id );
191 if( !strcmp(app_session_cache->session_id, session_id) ) {
192 if( app_session_cache->next != NULL ) {
193 osrf_app_session* next = app_session_cache->next;
194 app_session_cache = next;
197 app_session_cache = NULL;
202 if( app_session_cache->next == NULL )
205 osrf_app_session* prev = app_session_cache;
206 osrf_app_session* ptr = prev->next;
207 while( ptr != NULL ) {
208 if( ptr->session_id == session_id ) {
209 osrf_app_session* tmp = ptr->next;
217 /** Allocates a initializes a new app_session */
219 osrf_app_session* osrf_app_client_session_init( char* remote_service ) {
221 osrf_app_session* session = safe_malloc(sizeof(osrf_app_session));
223 session->transport_handle = osrf_system_get_transport_client();
224 if( session->transport_handle == NULL ) {
225 warning_handler("No transport client for service 'client'");
229 char target_buf[512];
230 memset(target_buf,0,512);
231 char* domain = config_value( "opensrf.bootstrap", "//bootstrap/domains/domain1" ); /* just the first for now */
232 char* router_name = config_value( "opensrf.bootstrap", "//bootstrap/router_name" );
233 sprintf( target_buf, "%s@%s/%s", router_name, domain, remote_service );
237 session->request_queue = NULL;
238 session->remote_id = strdup(target_buf);
239 session->orig_remote_id = strdup(session->remote_id);
240 session->remote_service = strdup(remote_service);
242 /* build a chunky, random session id */
245 //srand((int)time(NULL));
247 sprintf(id, "%lf.%d%d", get_timestamp_millis(), (int)time(NULL), getpid());
248 session->session_id = strdup(id);
249 debug_handler( "Building a new client session with id [%s] [%s]",
250 session->remote_service, session->session_id );
252 session->thread_trace = 0;
253 session->state = OSRF_SESSION_DISCONNECTED;
254 session->type = OSRF_SESSION_CLIENT;
255 session->next = NULL;
256 _osrf_app_session_push_session( session );
260 osrf_app_session* osrf_app_server_session_init(
261 char* session_id, char* our_app, char* remote_service, char* remote_id ) {
263 osrf_app_session* session = osrf_app_session_find_session( session_id );
268 session = safe_malloc(sizeof(osrf_app_session));
270 session->transport_handle = osrf_system_get_transport_client();
271 if( session->transport_handle == NULL ) {
272 warning_handler("No transport client for service '%s'", our_app );
275 session->request_queue = NULL;
276 session->remote_id = strdup(remote_id);
277 session->orig_remote_id = strdup(remote_id);
278 session->session_id = strdup(session_id);
279 session->remote_service = strdup(remote_service);
281 debug_handler( "Building a new server session [%s] with id [%s]",
282 session->remote_service, session_id );
284 session->thread_trace = 0;
285 session->state = OSRF_SESSION_DISCONNECTED;
286 session->type = OSRF_SESSION_CLIENT;
287 session->next = NULL;
289 _osrf_app_session_push_session( session );
296 /** frees memory held by a session */
297 void _osrf_app_session_free( osrf_app_session* session ){
301 free(session->remote_id);
302 free(session->orig_remote_id);
303 free(session->session_id);
304 free(session->remote_service);
309 int osrf_app_session_make_request(
310 osrf_app_session* session, json* params, char* method_name, int protocol ) {
311 if(session == NULL) return -1;
313 osrf_message* req_msg = osrf_message_init( REQUEST, ++(session->thread_trace), protocol );
314 osrf_message_set_request_info( req_msg, method_name, params );
315 osrf_app_request* req = _osrf_app_request_init( session, req_msg );
316 if(!_osrf_app_session_send( session, req_msg ) ) {
317 warning_handler( "Error sending request message [%d]", session->thread_trace );
321 _osrf_app_session_push_request( session, req );
322 return req->request_id;
325 /** Adds an app_request to the request set */
326 void _osrf_app_session_push_request( osrf_app_session* session, osrf_app_request* req ){
327 if(session == NULL || req == NULL)
330 debug_handler( "Pushing [%d] onto requeust queue for session [%s] [%s]",
331 req->request_id, session->remote_service, session->session_id );
333 if(session->request_queue == NULL)
334 session->request_queue = req;
336 osrf_app_request* req2 = session->request_queue->next;
337 session->request_queue = req;
344 /** Removes an app_request from this session request set */
345 void _osrf_app_session_remove_request( osrf_app_session* session, osrf_app_request* req ){
346 if(session == NULL || req == NULL)
349 if(session->request_queue == NULL)
352 debug_handler("Removing request [%d] from session [%s] [%s]",
353 req->request_id, session->remote_service, session->session_id );
354 osrf_app_request* first = session->request_queue;
355 if(first->request_id == req->request_id) {
356 if(first->next == NULL) { /* only one in the list */
357 session->request_queue = NULL;
359 osrf_app_request* tmp = first->next;
360 session->request_queue = tmp;
364 osrf_app_request* lead = first->next;
366 while( lead != NULL ) {
367 if(lead->request_id == req->request_id) {
368 osrf_app_request* tmp = lead->next;
378 void osrf_app_session_set_complete( osrf_app_session* session, int request_id ) {
382 osrf_app_request* req = _osrf_app_session_get_request( session, request_id );
383 if(req) req->complete = 1;
386 int osrf_app_session_request_complete( osrf_app_session* session, int request_id ) {
389 osrf_app_request* req = _osrf_app_session_get_request( session, request_id );
391 return req->complete;
395 /** Returns the app_request with the given request_id (request_id) */
396 osrf_app_request* _osrf_app_session_get_request(
397 osrf_app_session* session, int request_id ){
401 debug_handler( "App Session searching for request [%d] in request queue",request_id );
402 osrf_app_request* req = session->request_queue;
403 while( req != NULL ) {
404 if(req->request_id == request_id)
412 /** Resets the remote connection id to that of the original*/
413 void osrf_app_session_reset_remote( osrf_app_session* session ){
417 free(session->remote_id);
418 debug_handler( "App Session [%s] [%s] resetting remote id to %s",
419 session->remote_service, session->session_id, session->orig_remote_id );
421 session->remote_id = strdup(session->orig_remote_id);
424 void osrf_app_session_set_remote( osrf_app_session* session, char* remote_id ) {
427 if( session->remote_id )
428 free(session->remote_id );
429 session->remote_id = strdup( remote_id );
432 /** pushes the given message into the result list of the app_request
433 with the given request_id */
434 int osrf_app_session_push_queue(
435 osrf_app_session* session, osrf_message* msg ){
437 if(session == NULL || msg == NULL)
440 debug_handler( "AppSession pushing result for [%d] onto request payload queue",
443 osrf_app_request* req = session->request_queue;
446 warning_handler( "app_session has no app_requests in its queue yet we have a result for [%d]", msg->thread_trace );
450 debug_handler( "The first request in the request queue has tt [%d]", req->request_id );
452 while( req != NULL ) {
453 if(req->request_id == msg->thread_trace) {
454 debug_handler( "Found app_request for tt [%d]", msg->thread_trace );
455 _osrf_app_request_push_queue( req, msg );
465 /** Attempts to connect to the remote service */
466 int osrf_app_session_connect(osrf_app_session* session){
471 if(session->state == OSRF_SESSION_CONNECTED) {
472 debug_handler("Already Connected, returning");
476 int timeout = 5; /* XXX CONFIG VALUE */
478 debug_handler( "AppSession connecting to %s", session->remote_id );
480 /* defaulting to protocol 1 for now */
481 osrf_message* con_msg = osrf_message_init( CONNECT, session->thread_trace, 1 );
482 osrf_app_session_reset_remote( session );
483 session->state = OSRF_SESSION_CONNECTING;
484 int ret = _osrf_app_session_send( session, con_msg );
485 osrf_message_free(con_msg);
488 time_t start = time(NULL);
489 time_t remaining = (time_t) timeout;
491 while( session->state != OSRF_SESSION_CONNECTED && remaining >= 0 ) {
492 osrf_app_session_queue_wait( session, remaining );
493 remaining -= (int) (time(NULL) - start);
496 if(session->state == OSRF_SESSION_CONNECTED)
497 debug_handler(" * Connected Successfully");
499 if(session->state != OSRF_SESSION_CONNECTED)
507 /** Disconnects from the remote service */
508 int osrf_app_session_disconnect( osrf_app_session* session){
512 if(session->state == OSRF_SESSION_DISCONNECTED)
514 debug_handler( "AppSession disconnecting from %s", session->remote_id );
516 osrf_message* dis_msg = osrf_message_init( DISCONNECT, session->thread_trace, 1 );
517 session->state = OSRF_SESSION_DISCONNECTED;
518 _osrf_app_session_send( session, dis_msg );
520 osrf_message_free( dis_msg );
521 osrf_app_session_reset_remote( session );
525 int osrf_app_session_request_resend( osrf_app_session* session, int req_id ) {
526 osrf_app_request* req = _osrf_app_session_get_request( session, req_id );
527 return _osrf_app_request_resend( req );
530 /** Send the given message */
531 int _osrf_app_session_send( osrf_app_session* session, osrf_message* msg ){
532 if(session == NULL) return 0;
535 osrf_app_session_queue_wait( session, 0 );
536 debug_handler( "AppSession sending type %d, and thread_trace %d",
537 msg->m_type, msg->thread_trace );
539 if( (msg->m_type != CONNECT) && (msg->m_type != DISCONNECT) &&
540 (session->state != OSRF_SESSION_CONNECTED) ) {
541 if(!osrf_app_session_connect( session ))
545 char* xml = osrf_message_to_xml(msg);
547 debug_handler("[%s] [%s] Remote Id: %s",
548 session->remote_service, session->session_id, session->remote_id );
550 transport_message* t_msg = message_init(
551 xml, "", session->session_id, session->remote_id, NULL );
553 debug_handler("Session [%s] [%s] sending to %s \nXML:\n%s",
554 session->remote_service, session->session_id, t_msg->recipient, xml );
555 ret_val = client_send_message( session->transport_handle, t_msg );
557 message_free( t_msg );
562 /** Waits up to 'timeout' seconds for some data to arrive.
563 * Any data that arrives will be processed according to its
564 * payload and message type. This method will return after
565 * any data has arrived.
567 int osrf_app_session_queue_wait( osrf_app_session* session, int timeout ){
568 if(session == NULL) return 0;
570 debug_handler( "AppSession in queue_wait with timeout %d", timeout );
571 ret_val = osrf_stack_process(session->transport_handle, timeout );
575 /** Disconnects (if client) and removes the given session from the global session cache
576 * ! This free's all attached app_requests !
578 void osrf_app_session_destroy ( osrf_app_session* session ){
579 if(session == NULL) return;
581 debug_handler( "AppSession [%s] [%s] destroying self and deleting requests",
582 session->remote_service, session->session_id );
583 if(session->type == OSRF_SESSION_CLIENT
584 && session->state != OSRF_SESSION_DISCONNECTED ) { /* disconnect if we're a client */
585 osrf_message* dis_msg = osrf_message_init( DISCONNECT, session->thread_trace, 1 );
586 _osrf_app_session_send( session, dis_msg );
587 osrf_message_free(dis_msg);
589 //session->state = OSRF_SESSION_DISCONNECTED;
590 _osrf_app_session_remove_session(session->session_id);
591 debug_handler("AppSession [%s] [%s] removed from cache",
592 session->remote_service, session->session_id );
594 osrf_app_request* req;
595 while( session->request_queue != NULL ) {
596 req = session->request_queue->next;
597 _osrf_app_request_free( session->request_queue );
598 session->request_queue = req;
601 _osrf_app_session_free( session );
604 osrf_message* osrf_app_session_request_recv(
605 osrf_app_session* session, int req_id, int timeout ) {
606 if(req_id < 0 || session == NULL)
608 osrf_app_request* req = _osrf_app_session_get_request( session, req_id );
609 return _osrf_app_request_recv( req, timeout );