1 #include "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 );
40 osrf_message* cur_msg = req->result;
41 while( cur_msg != NULL ) {
42 osrf_message* next_msg = cur_msg->next;
43 osrf_message_free( cur_msg );
46 osrf_message_free( req->payload );
50 debug_handler("after request free");
53 /** Pushes the given message onto the list of 'responses' to this request */
54 void _osrf_app_request_push_queue( osrf_app_request* req, osrf_message* result ){
55 if(req == NULL || result == NULL) return;
56 debug_handler( "App Session pushing [%d] onto request queue", result->thread_trace );
57 if(req->result == NULL)
60 result->next = req->result;
65 /** Removes this app_request from our session request set */
66 void osrf_app_session_request_finish(
67 osrf_app_session* session, int req_id ){
69 if(session == NULL) return;
70 debug_handler("Finishing request %d", req_id );
71 osrf_app_request* req = _osrf_app_session_get_request( session, req_id );
72 if(req == NULL) return;
73 _osrf_app_session_remove_request( req->session, req );
74 _osrf_app_request_free( req );
78 void osrf_app_session_request_reset_timeout( osrf_app_session* session, int req_id ) {
79 if(session == NULL) return;
80 debug_handler("Resetting timeout %d", req_id );
81 osrf_app_request* req = _osrf_app_session_get_request( session, req_id );
82 if(req == NULL) return;
83 req->reset_timeout = 1;
86 /** Checks the receive queue for messages. If any are found, the first
87 * is popped off and returned. Otherwise, this method will wait at most timeout
88 * seconds for a message to appear in the receive queue. Once it arrives it is returned.
89 * If no messages arrive in the timeout provided, null is returned.
91 osrf_message* _osrf_app_request_recv( osrf_app_request* req, int timeout ) {
93 if(req == NULL) return NULL;
95 if( req->result != NULL ) {
96 debug_handler("app_request receive already has a message, returning it");
97 /* pop off the first message in the list */
98 osrf_message* tmp_msg = req->result;
99 req->result = req->result->next;
103 time_t start = time(NULL);
104 time_t remaining = (time_t) timeout;
106 while( remaining >= 0 ) {
107 /* tell the session to wait for stuff */
108 debug_handler( "In app_request receive with remaining time [%d]", (int) remaining );
110 osrf_app_session_queue_wait( req->session, 0 );
112 if( req->result != NULL ) { /* if we received anything */
113 /* pop off the first message in the list */
114 debug_handler( "app_request_recv received a message, returning it");
115 osrf_message* ret_msg = req->result;
116 osrf_message* tmp_msg = ret_msg->next;
117 req->result = tmp_msg;
124 osrf_app_session_queue_wait( req->session, (int) remaining );
126 if( req->result != NULL ) { /* if we received anything */
127 /* pop off the first message in the list */
128 debug_handler( "app_request_recv received a message, returning it");
129 osrf_message* ret_msg = req->result;
130 osrf_message* tmp_msg = ret_msg->next;
131 req->result = tmp_msg;
137 if(req->reset_timeout) {
138 remaining = (time_t) timeout;
139 req->reset_timeout = 0;
140 debug_handler("Recevied a timeout reset");
142 remaining -= (int) (time(NULL) - start);
146 debug_handler("Returning NULL from app_request_recv after timeout");
150 /** Resend this requests original request message */
151 int _osrf_app_request_resend( osrf_app_request* req ) {
152 if(req == NULL) return 0;
154 debug_handler( "Resending request [%d]", req->request_id );
155 return _osrf_app_session_send( req->session, req->payload );
162 // --------------------------------------------------------------------------
163 // --------------------------------------------------------------------------
165 // --------------------------------------------------------------------------
167 /** returns a session from the global session hash */
168 osrf_app_session* osrf_app_session_find_session( char* session_id ) {
169 osrf_app_session* ptr = app_session_cache;
170 debug_handler("Searching for session in global cache with id [%s]", session_id );
171 while( ptr != NULL ) {
172 if( !strcmp(ptr->session_id,session_id) )
180 /** adds a session to the global session cache */
181 void _osrf_app_session_push_session( osrf_app_session* session ) {
183 if( app_session_cache == NULL ) {
184 app_session_cache = session;
188 osrf_app_session* ptr = app_session_cache;
189 debug_handler( "Pushing [%s] [%s] onto global session cache",
190 session->remote_service, session->session_id );
191 while( ptr != NULL ) {
192 if( !strcmp(ptr->session_id, session->session_id) )
194 if( ptr->next == NULL ) {
203 /** unlinks from global session cache */
204 void _osrf_app_session_remove_session( char* session_id ) {
206 if( app_session_cache == NULL )
209 debug_handler( "App Session removing session [%s] from global cache", session_id );
210 if( !strcmp(app_session_cache->session_id, session_id) ) {
211 if( app_session_cache->next != NULL ) {
212 osrf_app_session* next = app_session_cache->next;
213 app_session_cache = next;
216 app_session_cache = NULL;
221 if( app_session_cache->next == NULL )
224 osrf_app_session* prev = app_session_cache;
225 osrf_app_session* ptr = prev->next;
226 while( ptr != NULL ) {
227 if( ptr->session_id == session_id ) {
228 osrf_app_session* tmp = ptr->next;
236 /** Allocates a initializes a new app_session */
238 osrf_app_session* osrf_app_client_session_init( char* remote_service ) {
240 osrf_app_session* session = safe_malloc(sizeof(osrf_app_session));
242 session->transport_handle = osrf_system_get_transport_client();
243 if( session->transport_handle == NULL ) {
244 warning_handler("No transport client for service 'client'");
248 char target_buf[512];
249 memset(target_buf,0,512);
250 char* domain = config_value( "opensrf.bootstrap", "//bootstrap/domains/domain1" ); /* just the first for now */
251 char* router_name = config_value( "opensrf.bootstrap", "//bootstrap/router_name" );
252 sprintf( target_buf, "%s@%s/%s", router_name, domain, remote_service );
256 session->request_queue = NULL;
257 session->remote_id = strdup(target_buf);
258 session->orig_remote_id = strdup(session->remote_id);
259 session->remote_service = strdup(remote_service);
261 #ifdef ASSUME_STATELESS
262 session->stateless = 1;
263 debug_handler("session is stateless");
265 session->stateless = 0;
266 debug_handler("session is NOT stateless");
269 /* build a chunky, random session id */
273 sprintf(id, "%lf.%d%d", get_timestamp_millis(), (int)time(NULL), getpid());
274 session->session_id = strdup(id);
275 debug_handler( "Building a new client session with id [%s] [%s]",
276 session->remote_service, session->session_id );
278 session->thread_trace = 0;
279 session->state = OSRF_SESSION_DISCONNECTED;
280 session->type = OSRF_SESSION_CLIENT;
281 session->next = NULL;
282 _osrf_app_session_push_session( session );
286 osrf_app_session* osrf_app_server_session_init(
287 char* session_id, char* our_app, char* remote_service, char* remote_id ) {
289 osrf_app_session* session = osrf_app_session_find_session( session_id );
294 session = safe_malloc(sizeof(osrf_app_session));
296 session->transport_handle = osrf_system_get_transport_client();
297 if( session->transport_handle == NULL ) {
298 warning_handler("No transport client for service '%s'", our_app );
301 session->request_queue = NULL;
302 session->remote_id = strdup(remote_id);
303 session->orig_remote_id = strdup(remote_id);
304 session->session_id = strdup(session_id);
305 session->remote_service = strdup(remote_service);
307 #ifdef ASSUME_STATELESS
308 session->stateless = 1;
310 session->stateless = 0;
313 debug_handler( "Building a new server session [%s] with id [%s]",
314 session->remote_service, session_id );
316 session->thread_trace = 0;
317 session->state = OSRF_SESSION_DISCONNECTED;
318 session->type = OSRF_SESSION_CLIENT;
319 session->next = NULL;
321 _osrf_app_session_push_session( session );
328 /** frees memory held by a session */
329 void _osrf_app_session_free( osrf_app_session* session ){
333 free(session->remote_id);
334 free(session->orig_remote_id);
335 free(session->session_id);
336 free(session->remote_service);
342 int osrf_app_session_make_request(
343 osrf_app_session* session, json* params,
344 char* method_name, int protocol, string_array* param_strings ) {
345 if(session == NULL) return -1;
347 osrf_message* req_msg = osrf_message_init( REQUEST, ++(session->thread_trace), protocol );
348 osrf_message_set_request_info( req_msg, method_name, params );
350 if(!req_msg->parse_json_params && param_strings) {
352 for(i = 0; i!= param_strings->size ; i++ ) {
353 osrf_message_add_param(req_msg,
354 string_array_get_string(param_strings,i));
358 osrf_app_request* req = _osrf_app_request_init( session, req_msg );
359 if(!_osrf_app_session_send( session, req_msg ) ) {
360 warning_handler( "Error sending request message [%d]", session->thread_trace );
364 _osrf_app_session_push_request( session, req );
365 return req->request_id;
372 int osrf_app_session_make_req(
373 osrf_app_session* session, object* params,
374 char* method_name, int protocol, string_array* param_strings ) {
375 if(session == NULL) return -1;
377 osrf_message* req_msg = osrf_message_init( REQUEST, ++(session->thread_trace), protocol );
378 osrf_message_set_method(req_msg, method_name);
380 osrf_message_set_params(req_msg, params);
386 for(i = 0; i!= param_strings->size ; i++ ) {
387 osrf_message_add_param(req_msg,
388 string_array_get_string(param_strings,i));
393 osrf_app_request* req = _osrf_app_request_init( session, req_msg );
394 if(!_osrf_app_session_send( session, req_msg ) ) {
395 warning_handler( "Error sending request message [%d]", session->thread_trace );
399 _osrf_app_session_push_request( session, req );
400 return req->request_id;
405 /** Adds an app_request to the request set */
406 void _osrf_app_session_push_request( osrf_app_session* session, osrf_app_request* req ){
407 if(session == NULL || req == NULL)
410 debug_handler( "Pushing [%d] onto requeust queue for session [%s] [%s]",
411 req->request_id, session->remote_service, session->session_id );
413 if(session->request_queue == NULL)
414 session->request_queue = req;
416 osrf_app_request* req2 = session->request_queue->next;
417 session->request_queue = req;
424 /** Removes an app_request from this session request set */
425 void _osrf_app_session_remove_request( osrf_app_session* session, osrf_app_request* req ){
426 if(session == NULL || req == NULL)
429 if(session->request_queue == NULL)
432 debug_handler("Removing request [%d] from session [%s] [%s]",
433 req->request_id, session->remote_service, session->session_id );
435 osrf_app_request* first = session->request_queue;
436 if(first->request_id == req->request_id) {
437 session->request_queue = first->next;
440 if(first->next == NULL) {
441 session->request_queue = NULL;
443 osrf_app_request* tmp = first->next;
444 session->request_queue = tmp;
449 osrf_app_request* lead = first->next;
451 while( lead != NULL ) {
452 if(lead->request_id == req->request_id) {
453 first->next = lead->next;
462 void osrf_app_session_set_complete( osrf_app_session* session, int request_id ) {
466 osrf_app_request* req = _osrf_app_session_get_request( session, request_id );
467 if(req) req->complete = 1;
470 int osrf_app_session_request_complete( osrf_app_session* session, int request_id ) {
473 osrf_app_request* req = _osrf_app_session_get_request( session, request_id );
475 return req->complete;
479 /** Returns the app_request with the given request_id (request_id) */
480 osrf_app_request* _osrf_app_session_get_request(
481 osrf_app_session* session, int request_id ){
485 debug_handler( "App Session searching for request [%d] in request queue",request_id );
486 osrf_app_request* req = session->request_queue;
487 while( req != NULL ) {
488 if(req->request_id == request_id)
496 /** Resets the remote connection id to that of the original*/
497 void osrf_app_session_reset_remote( osrf_app_session* session ){
501 free(session->remote_id);
502 debug_handler( "App Session [%s] [%s] resetting remote id to %s",
503 session->remote_service, session->session_id, session->orig_remote_id );
505 session->remote_id = strdup(session->orig_remote_id);
508 void osrf_app_session_set_remote( osrf_app_session* session, char* remote_id ) {
511 if( session->remote_id )
512 free(session->remote_id );
513 session->remote_id = strdup( remote_id );
516 /** pushes the given message into the result list of the app_request
517 with the given request_id */
518 int osrf_app_session_push_queue(
519 osrf_app_session* session, osrf_message* msg ){
521 if(session == NULL || msg == NULL)
524 debug_handler( "AppSession pushing result for [%d] onto request payload queue",
527 osrf_app_request* req = session->request_queue;
530 warning_handler( "app_session has no app_requests in its queue yet we have a result for [%d]", msg->thread_trace );
534 while( req != NULL ) {
535 if(req->request_id == msg->thread_trace) {
536 debug_handler( "Found app_request for tt [%d]", msg->thread_trace );
537 _osrf_app_request_push_queue( req, msg );
547 /** Attempts to connect to the remote service */
548 int osrf_app_session_connect(osrf_app_session* session){
553 if(session->state == OSRF_SESSION_CONNECTED) {
554 debug_handler("Already Connected, returning");
558 int timeout = 5; /* XXX CONFIG VALUE */
560 debug_handler( "AppSession connecting to %s", session->remote_id );
562 /* defaulting to protocol 1 for now */
563 osrf_message* con_msg = osrf_message_init( CONNECT, session->thread_trace, 1 );
564 osrf_app_session_reset_remote( session );
565 session->state = OSRF_SESSION_CONNECTING;
566 int ret = _osrf_app_session_send( session, con_msg );
567 osrf_message_free(con_msg);
570 time_t start = time(NULL);
571 time_t remaining = (time_t) timeout;
573 while( session->state != OSRF_SESSION_CONNECTED && remaining >= 0 ) {
574 osrf_app_session_queue_wait( session, remaining );
575 remaining -= (int) (time(NULL) - start);
578 if(session->state == OSRF_SESSION_CONNECTED)
579 debug_handler(" * Connected Successfully");
581 if(session->state != OSRF_SESSION_CONNECTED)
589 /** Disconnects from the remote service */
590 int osrf_app_session_disconnect( osrf_app_session* session){
594 if(session->state == OSRF_SESSION_DISCONNECTED)
597 if(session->stateless && session->state != OSRF_SESSION_CONNECTED) {
599 "Exiting disconnect on stateless session %s",
600 session->session_id);
604 debug_handler( "AppSession disconnecting from %s", session->remote_id );
606 osrf_message* dis_msg = osrf_message_init( DISCONNECT, session->thread_trace, 1 );
607 session->state = OSRF_SESSION_DISCONNECTED;
608 _osrf_app_session_send( session, dis_msg );
610 osrf_message_free( dis_msg );
611 osrf_app_session_reset_remote( session );
615 int osrf_app_session_request_resend( osrf_app_session* session, int req_id ) {
616 debug_handler("In reqeust resend searching for resend-able messages");
617 osrf_app_request* req = _osrf_app_session_get_request( session, req_id );
618 return _osrf_app_request_resend( req );
621 /** Send the given message */
622 int _osrf_app_session_send( osrf_app_session* session, osrf_message* msg ){
623 if(session == NULL) return 0;
626 osrf_app_session_queue_wait( session, 0 );
627 debug_handler( "AppSession sending type %d, and thread_trace %d",
628 msg->m_type, msg->thread_trace );
630 if(session->stateless) {
631 osrf_app_session_reset_remote(session);
635 if( (msg->m_type != CONNECT) && (msg->m_type != DISCONNECT) &&
636 (session->state != OSRF_SESSION_CONNECTED) ) {
637 if(!osrf_app_session_connect( session ))
642 //char* xml = osrf_message_to_xml(msg);
643 char* string = osrf_message_serialize(msg);
645 debug_handler("[%s] [%s] Remote Id: %s",
646 session->remote_service, session->session_id, session->remote_id );
648 transport_message* t_msg = message_init(
649 string, "", session->session_id, session->remote_id, NULL );
651 debug_handler("Session [%s] [%s] sending to %s \nXML:\n%s",
652 session->remote_service, session->session_id, t_msg->recipient, string );
653 ret_val = client_send_message( session->transport_handle, t_msg );
655 message_free( t_msg );
660 /** Waits up to 'timeout' seconds for some data to arrive.
661 * Any data that arrives will be processed according to its
662 * payload and message type. This method will return after
663 * any data has arrived.
665 int osrf_app_session_queue_wait( osrf_app_session* session, int timeout ){
666 if(session == NULL) return 0;
668 debug_handler( "AppSession in queue_wait with timeout %d", timeout );
669 ret_val = osrf_stack_process(session->transport_handle, timeout );
673 /** Disconnects (if client) and removes the given session from the global session cache
674 * ! This free's all attached app_requests !
676 void osrf_app_session_destroy ( osrf_app_session* session ){
677 if(session == NULL) return;
679 debug_handler( "AppSession [%s] [%s] destroying self and deleting requests",
680 session->remote_service, session->session_id );
681 if(session->type == OSRF_SESSION_CLIENT
682 && session->state != OSRF_SESSION_DISCONNECTED ) { /* disconnect if we're a client */
683 osrf_message* dis_msg = osrf_message_init( DISCONNECT, session->thread_trace, 1 );
684 _osrf_app_session_send( session, dis_msg );
685 osrf_message_free(dis_msg);
687 //session->state = OSRF_SESSION_DISCONNECTED;
688 _osrf_app_session_remove_session(session->session_id);
689 debug_handler("AppSession [%s] [%s] removed from cache",
690 session->remote_service, session->session_id );
692 osrf_app_request* req;
693 while( session->request_queue != NULL ) {
694 req = session->request_queue->next;
695 _osrf_app_request_free( session->request_queue );
696 session->request_queue = req;
699 _osrf_app_session_free( session );
702 osrf_message* osrf_app_session_request_recv(
703 osrf_app_session* session, int req_id, int timeout ) {
704 if(req_id < 0 || session == NULL)
706 debug_handler("somebody callled recv");
707 osrf_app_request* req = _osrf_app_session_get_request( session, req_id );
708 return _osrf_app_request_recv( req, timeout );