1 #include "opensrf/osrf_app_session.h"
4 /* the global app_session cache */
5 osrf_app_session* app_session_cache;
9 // --------------------------------------------------------------------------
10 // --------------------------------------------------------------------------
12 // --------------------------------------------------------------------------
14 /** Allocations 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;
34 osrf_message* cur_msg = req->result;
35 while( cur_msg != NULL ) {
36 osrf_message* next_msg = cur_msg->next;
37 osrf_message_free( cur_msg );
40 osrf_message_free( req->payload );
44 /** Pushes the given message onto the list of 'responses' to this request */
45 void _osrf_app_request_push_queue( osrf_app_request* req, osrf_message* result ){
46 if(req == NULL || result == NULL) return;
47 debug_handler( "App Session pushing [%d] onto request queue", result->thread_trace );
48 if(req->result == NULL)
51 result->next = req->result;
56 /** Removes this app_request from our session request set */
57 void osrf_app_session_request_finish(
58 osrf_app_session* session, int req_id ){
60 if(session == NULL) return;
61 osrf_app_request* req = _osrf_app_session_get_request( session, req_id );
62 if(req == NULL) return;
63 _osrf_app_session_remove_request( req->session, req );
64 _osrf_app_request_free( req );
67 /** Checks the receive queue for messages. If any are found, the first
68 * is popped off and returned. Otherwise, this method will wait at most timeout
69 * seconds for a message to appear in the receive queue. Once it arrives it is returned.
70 * If no messages arrive in the timeout provided, null is returned.
72 osrf_message* _osrf_app_request_recv( osrf_app_request* req, int timeout ) {
74 if(req == NULL) return NULL;
76 if( req->result != NULL ) {
77 debug_handler("app_request receive already has a message, returning it");
78 /* pop off the first message in the list */
79 osrf_message* tmp_msg = req->result->next;
80 req->result = tmp_msg;
84 time_t start = time(NULL);
85 time_t remaining = (time_t) timeout;
87 while( remaining >= 0 ) {
88 /* tell the session to wait for stuff */
89 debug_handler( "In app_request receive with remaining time [%d]", (int) remaining );
90 osrf_app_session_queue_wait( req->session, (int) remaining );
92 if( req->result != NULL ) { /* if we received anything */
93 /* pop off the first message in the list */
94 debug_handler( "app_request_recv received a message, returning it");
95 osrf_message* ret_msg = req->result;
96 osrf_message* tmp_msg = ret_msg->next;
97 req->result = tmp_msg;
103 remaining -= (int) (time(NULL) - start);
109 /** Resend this requests original request message */
110 int _osrf_app_request_resend( osrf_app_request* req ) {
111 if(req == NULL) return 0;
112 debug_handler( "Resending request [%d]", req->request_id );
113 return _osrf_app_session_send( req->session, req->payload );
118 // --------------------------------------------------------------------------
119 // --------------------------------------------------------------------------
121 // --------------------------------------------------------------------------
123 /** returns a session from the global session hash */
124 osrf_app_session* osrf_app_session_find_session( char* session_id ) {
125 osrf_app_session* ptr = app_session_cache;
126 debug_handler("Searching for session in global cache with id [%s]", session_id );
127 while( ptr != NULL ) {
128 if( !strcmp(ptr->session_id,session_id) )
136 /** adds a session to the global session cache */
137 void _osrf_app_session_push_session( osrf_app_session* session ) {
139 if( app_session_cache == NULL ) {
140 app_session_cache = session;
144 osrf_app_session* ptr = app_session_cache;
145 debug_handler( "Pushing [%s] onto global session cache", session->session_id );
146 while( ptr != NULL ) {
147 if( !strcmp(ptr->session_id, session->session_id) )
149 if( ptr->next == NULL ) {
158 /** unlinks from global session cache */
159 void _osrf_app_session_remove_session( char* session_id ) {
161 if( app_session_cache == NULL )
164 debug_handler( "App Session removing session [%s] from global cache", session_id );
165 if( !strcmp(app_session_cache->session_id, session_id) ) {
166 if( app_session_cache->next != NULL ) {
167 osrf_app_session* next = app_session_cache->next;
168 app_session_cache = next;
171 app_session_cache = NULL;
176 if( app_session_cache->next == NULL )
179 osrf_app_session* prev = app_session_cache;
180 osrf_app_session* ptr = prev->next;
181 while( ptr != NULL ) {
182 if( ptr->session_id == session_id ) {
183 osrf_app_session* tmp = ptr->next;
191 /** Allocates a initializes a new app_session */
193 osrf_app_session* osrf_app_client_session_init( char* remote_service ) {
194 osrf_app_session* session = safe_malloc(sizeof(osrf_app_session));
196 session->transport_handle = osrf_system_get_transport_client( "client" );
197 if( session->transport_handle == NULL ) {
198 warning_handler("No transport client for service 'client'");
201 session->request_queue = NULL;
202 session->remote_id = strdup("router@judy/math"); /*XXX config value */
203 session->orig_remote_id = strdup(session->remote_id);
205 /* build a chunky, random session id */
208 srand((int)time(NULL));
209 sprintf(id, "%d.%d%d", rand(), (int)time(NULL), getpid());
210 session->session_id = strdup(id);
211 debug_handler( "Building a new client session with id [%s]", session->session_id );
213 session->thread_trace = 0;
214 session->state = OSRF_SESSION_DISCONNECTED;
215 session->type = OSRF_SESSION_CLIENT;
216 session->next = NULL;
217 _osrf_app_session_push_session( session );
221 osrf_app_session* osrf_app_server_session_init(
222 char* session_id, char* our_app, char* remote_service, char* remote_id ) {
224 osrf_app_session* session = osrf_app_session_find_session( session_id );
228 debug_handler( "Building a new server session with id [%s]", session_id );
230 session = safe_malloc(sizeof(osrf_app_session));
232 session->transport_handle = osrf_system_get_transport_client( our_app );
233 if( session->transport_handle == NULL ) {
234 warning_handler("No transport client for service '%s'", our_app );
237 session->request_queue = NULL;
238 session->remote_id = strdup(remote_id);
239 session->orig_remote_id = strdup(remote_id);
240 session->session_id = strdup(session_id);
242 session->thread_trace = 0;
243 session->state = OSRF_SESSION_DISCONNECTED;
244 session->type = OSRF_SESSION_CLIENT;
245 session->next = NULL;
247 _osrf_app_session_push_session( session );
254 /** frees memory held by a session */
255 void _osrf_app_session_free( osrf_app_session* session ){
259 free(session->remote_id);
260 free(session->orig_remote_id);
265 int osrf_app_session_make_request(
266 osrf_app_session* session, json* params, char* method_name, int protocol ) {
267 if(session == NULL) return -1;
269 osrf_message* req_msg = osrf_message_init( REQUEST, ++(session->thread_trace), protocol );
270 osrf_message_set_request_info( req_msg, method_name, params );
271 osrf_app_request* req = _osrf_app_request_init( session, req_msg );
272 if(!_osrf_app_session_send( session, req_msg ) ) {
273 warning_handler( "Error sending request message [%d]", session->thread_trace );
277 _osrf_app_session_push_request( session, req );
278 return req->request_id;
281 /** Adds an app_request to the request set */
282 void _osrf_app_session_push_request( osrf_app_session* session, osrf_app_request* req ){
283 if(session == NULL || req == NULL)
286 debug_handler( "Pushing [%d] onto requeust queue for session [%s]",
287 req->request_id, session->session_id );
289 if(session->request_queue == NULL)
290 session->request_queue = req;
292 osrf_app_request* req2 = session->request_queue->next;
293 session->request_queue = req;
300 /** Removes an app_request from this session request set */
301 void _osrf_app_session_remove_request( osrf_app_session* session, osrf_app_request* req ){
302 if(session == NULL || req == NULL)
305 if(session->request_queue == NULL)
308 debug_handler("Removing request [%d] from session [%s]",
309 req->request_id, session->session_id );
310 osrf_app_request* first = session->request_queue;
311 if(first->request_id == req->request_id) {
312 if(first->next == NULL) { /* only one in the list */
313 session->request_queue = NULL;
315 osrf_app_request* tmp = first->next;
316 session->request_queue = tmp;
320 osrf_app_request* lead = first->next;
322 while( lead != NULL ) {
323 if(lead->request_id == req->request_id) {
324 osrf_app_request* tmp = lead->next;
334 void osrf_app_session_set_complete( osrf_app_session* session, int request_id ) {
338 osrf_app_request* req = _osrf_app_session_get_request( session, request_id );
339 if(req) req->complete = 1;
342 int osrf_app_session_request_complete( osrf_app_session* session, int request_id ) {
345 osrf_app_request* req = _osrf_app_session_get_request( session, request_id );
346 return req->complete;
349 /** Returns the app_request with the given request_id (request_id) */
350 osrf_app_request* _osrf_app_session_get_request(
351 osrf_app_session* session, int request_id ){
355 debug_handler( "App Session searching for request [%d] in request queue",request_id );
356 osrf_app_request* req = session->request_queue;
357 while( req != NULL ) {
358 if(req->request_id == request_id)
366 /** Resets the remote connection id to that of the original*/
367 void osrf_app_session_reset_remote( osrf_app_session* session ){
371 free(session->remote_id);
372 debug_handler( "App Session [%s] resetting remote it to %s",
373 session->session_id, session->orig_remote_id );
375 session->remote_id = strdup(session->orig_remote_id);
378 void osrf_app_session_set_remote( osrf_app_session* session, char* remote_id ) {
381 if( session->remote_id )
382 free(session->remote_id );
383 session->remote_id = strdup( remote_id );
386 /** pushes the given message into the result list of the app_request
387 with the given request_id */
388 int osrf_app_session_push_queue(
389 osrf_app_session* session, osrf_message* msg ){
391 if(session == NULL || msg == NULL)
394 debug_handler( "AppSession pushing result for [%d] onto request payload queue",
397 osrf_app_request* req = session->request_queue;
400 warning_handler( "app_session has no app_requests in its queue yet we have a result for [%d]", msg->thread_trace );
404 debug_handler( "The first request in the request queue has tt [%d]", req->request_id );
406 while( req != NULL ) {
407 if(req->request_id == msg->thread_trace) {
408 debug_handler( "Found app_request for tt [%d]", msg->thread_trace );
409 _osrf_app_request_push_queue( req, msg );
419 /** Attempts to connect to the remote service */
420 int osrf_app_session_connect(osrf_app_session* session){
425 int timeout = 5; /* XXX CONFIG VALUE */
427 debug_handler( "AppSession connecting to %s", session->remote_id );
429 /* defaulting to protocol 1 for now */
430 osrf_message* con_msg = osrf_message_init( CONNECT, session->thread_trace, 1 );
431 osrf_app_session_reset_remote( session );
432 session->state = OSRF_SESSION_CONNECTING;
433 if(!_osrf_app_session_send( session, con_msg ) )
436 time_t start = time(NULL);
437 time_t remaining = (time_t) timeout;
439 while( session->state != OSRF_SESSION_CONNECTED && remaining >= 0 ) {
440 osrf_app_session_queue_wait( session, remaining );
441 remaining -= (int) (time(NULL) - start);
444 if(session->state != OSRF_SESSION_CONNECTED)
452 /** Disconnects from the remote service */
453 int osrf_app_session_disconnect( osrf_app_session* session){
457 if(session->state == OSRF_SESSION_DISCONNECTED)
459 debug_handler( "AppSession disconnecting from %s", session->remote_id );
461 osrf_message* dis_msg = osrf_message_init( DISCONNECT, session->thread_trace, 1 );
462 session->state = OSRF_SESSION_DISCONNECTED;
463 _osrf_app_session_send( session, dis_msg );
465 osrf_message_free( dis_msg );
466 osrf_app_session_reset_remote( session );
470 int osrf_app_session_request_resend( osrf_app_session* session, int req_id ) {
471 osrf_app_request* req = _osrf_app_session_get_request( session, req_id );
472 return _osrf_app_request_resend( req );
475 /** Send the given message */
476 int _osrf_app_session_send( osrf_app_session* session, osrf_message* msg ){
477 if(session == NULL) return 0;
480 osrf_app_session_queue_wait( session, 0 );
481 debug_handler( "AppSession sending type %d, and thread_trace %d",
482 msg->m_type, msg->thread_trace );
484 if( (msg->m_type != CONNECT) && (msg->m_type != DISCONNECT) &&
485 (session->state != OSRF_SESSION_CONNECTED) ) {
486 if(!osrf_app_session_connect( session ))
490 char* xml = osrf_message_to_xml(msg);
492 transport_message* t_msg = message_init(
493 xml, "", session->session_id, session->remote_id, NULL );
495 debug_handler("Sending XML:\n%s", xml );
496 ret_val = client_send_message( session->transport_handle, t_msg );
497 message_free( t_msg );
502 /** Waits up to 'timeout' seconds for some data to arrive.
503 * Any data that arrives will be processed according to its
504 * payload and message type. This method will return after
505 * any data has arrived.
507 int osrf_app_session_queue_wait( osrf_app_session* session, int timeout ){
508 if(session == NULL) return 0;
510 debug_handler( "AppSession in queue_wait with timeout %d", timeout );
511 ret_val = osrf_stack_process(session->transport_handle, timeout );
515 /** Disconnects (if client) and removes the given session from the global session cache
516 * ! This free's all attached app_requests !
518 void osrf_app_session_destroy ( osrf_app_session* session ){
519 if(session == NULL) return;
521 debug_handler( "AppSession [%s] destroying self and deleting requests", session->session_id );
522 if(session->type == OSRF_SESSION_CLIENT) { /* disconnect if we're a client */
523 osrf_message* dis_msg = osrf_message_init( DISCONNECT, session->thread_trace, 1 );
524 _osrf_app_session_send( session, dis_msg );
525 //osrf_app_session_reset_remote( session );
527 //session->state = OSRF_SESSION_DISCONNECTED;
528 _osrf_app_session_remove_session(session->session_id);
529 debug_handler("AppSession [%s] removed from cache", session->session_id );
531 osrf_app_request* req;
532 while( session->request_queue != NULL ) {
533 req = session->request_queue->next;
534 _osrf_app_request_free( session->request_queue );
535 session->request_queue = req;
538 _osrf_app_session_free( session );
541 osrf_message* osrf_app_session_request_recv(
542 osrf_app_session* session, int req_id, int timeout ) {
543 if(req_id < 0 || session == NULL)
545 osrf_app_request* req = _osrf_app_session_get_request( session, req_id );
546 return _osrf_app_request_recv( req, timeout );