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;
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 );
91 osrf_app_session_queue_wait( req->session, 0 );
93 if( req->result != NULL ) { /* if we received anything */
94 /* pop off the first message in the list */
95 debug_handler( "app_request_recv received a message, returning it");
96 osrf_message* ret_msg = req->result;
97 osrf_message* tmp_msg = ret_msg->next;
98 req->result = tmp_msg;
105 osrf_app_session_queue_wait( req->session, (int) remaining );
107 if( req->result != NULL ) { /* if we received anything */
108 /* pop off the first message in the list */
109 debug_handler( "app_request_recv received a message, returning it");
110 osrf_message* ret_msg = req->result;
111 osrf_message* tmp_msg = ret_msg->next;
112 req->result = tmp_msg;
118 remaining -= (int) (time(NULL) - start);
124 /** Resend this requests original request message */
125 int _osrf_app_request_resend( osrf_app_request* req ) {
126 if(req == NULL) return 0;
128 debug_handler( "Resending request [%d]", req->request_id );
129 return _osrf_app_session_send( req->session, req->payload );
136 // --------------------------------------------------------------------------
137 // --------------------------------------------------------------------------
139 // --------------------------------------------------------------------------
141 /** returns a session from the global session hash */
142 osrf_app_session* osrf_app_session_find_session( char* session_id ) {
143 osrf_app_session* ptr = app_session_cache;
144 debug_handler("Searching for session in global cache with id [%s]", session_id );
145 while( ptr != NULL ) {
146 if( !strcmp(ptr->session_id,session_id) )
154 /** adds a session to the global session cache */
155 void _osrf_app_session_push_session( osrf_app_session* session ) {
157 if( app_session_cache == NULL ) {
158 app_session_cache = session;
162 osrf_app_session* ptr = app_session_cache;
163 debug_handler( "Pushing [%s] onto global session cache", session->session_id );
164 while( ptr != NULL ) {
165 if( !strcmp(ptr->session_id, session->session_id) )
167 if( ptr->next == NULL ) {
176 /** unlinks from global session cache */
177 void _osrf_app_session_remove_session( char* session_id ) {
179 if( app_session_cache == NULL )
182 debug_handler( "App Session removing session [%s] from global cache", session_id );
183 if( !strcmp(app_session_cache->session_id, session_id) ) {
184 if( app_session_cache->next != NULL ) {
185 osrf_app_session* next = app_session_cache->next;
186 app_session_cache = next;
189 app_session_cache = NULL;
194 if( app_session_cache->next == NULL )
197 osrf_app_session* prev = app_session_cache;
198 osrf_app_session* ptr = prev->next;
199 while( ptr != NULL ) {
200 if( ptr->session_id == session_id ) {
201 osrf_app_session* tmp = ptr->next;
209 /** Allocates a initializes a new app_session */
211 osrf_app_session* osrf_app_client_session_init( char* remote_service ) {
212 osrf_app_session* session = safe_malloc(sizeof(osrf_app_session));
214 session->transport_handle = osrf_system_get_transport_client();
215 if( session->transport_handle == NULL ) {
216 warning_handler("No transport client for service 'client'");
220 char target_buf[512];
221 memset(target_buf,0,512);
222 char* domain = config_value( "opensrf.bootstrap", "//bootstrap/domains/domain1" ); /* just the first for now */
223 char* router_name = config_value( "opensrf.bootstrap", "//bootstrap/router_name" );
224 sprintf( target_buf, "%s@%s/%s", router_name, domain, remote_service );
228 session->request_queue = NULL;
229 session->remote_id = strdup(target_buf);
230 session->orig_remote_id = strdup(session->remote_id);
232 /* build a chunky, random session id */
235 srand((int)time(NULL));
236 sprintf(id, "%d.%d%d", rand(), (int)time(NULL), getpid());
237 session->session_id = strdup(id);
238 debug_handler( "Building a new client session with id [%s]", session->session_id );
240 session->thread_trace = 0;
241 session->state = OSRF_SESSION_DISCONNECTED;
242 session->type = OSRF_SESSION_CLIENT;
243 session->next = NULL;
244 _osrf_app_session_push_session( session );
248 osrf_app_session* osrf_app_server_session_init(
249 char* session_id, char* our_app, char* remote_service, char* remote_id ) {
251 osrf_app_session* session = osrf_app_session_find_session( session_id );
255 debug_handler( "Building a new server session with id [%s]", session_id );
257 session = safe_malloc(sizeof(osrf_app_session));
259 session->transport_handle = osrf_system_get_transport_client();
260 if( session->transport_handle == NULL ) {
261 warning_handler("No transport client for service '%s'", our_app );
264 session->request_queue = NULL;
265 session->remote_id = strdup(remote_id);
266 session->orig_remote_id = strdup(remote_id);
267 session->session_id = strdup(session_id);
269 session->thread_trace = 0;
270 session->state = OSRF_SESSION_DISCONNECTED;
271 session->type = OSRF_SESSION_CLIENT;
272 session->next = NULL;
274 _osrf_app_session_push_session( session );
281 /** frees memory held by a session */
282 void _osrf_app_session_free( osrf_app_session* session ){
286 free(session->remote_id);
287 free(session->orig_remote_id);
292 int osrf_app_session_make_request(
293 osrf_app_session* session, json* params, char* method_name, int protocol ) {
294 if(session == NULL) return -1;
296 osrf_message* req_msg = osrf_message_init( REQUEST, ++(session->thread_trace), protocol );
297 osrf_message_set_request_info( req_msg, method_name, params );
298 osrf_app_request* req = _osrf_app_request_init( session, req_msg );
299 if(!_osrf_app_session_send( session, req_msg ) ) {
300 warning_handler( "Error sending request message [%d]", session->thread_trace );
304 _osrf_app_session_push_request( session, req );
305 return req->request_id;
308 /** Adds an app_request to the request set */
309 void _osrf_app_session_push_request( osrf_app_session* session, osrf_app_request* req ){
310 if(session == NULL || req == NULL)
313 debug_handler( "Pushing [%d] onto requeust queue for session [%s]",
314 req->request_id, session->session_id );
316 if(session->request_queue == NULL)
317 session->request_queue = req;
319 osrf_app_request* req2 = session->request_queue->next;
320 session->request_queue = req;
327 /** Removes an app_request from this session request set */
328 void _osrf_app_session_remove_request( osrf_app_session* session, osrf_app_request* req ){
329 if(session == NULL || req == NULL)
332 if(session->request_queue == NULL)
335 debug_handler("Removing request [%d] from session [%s]",
336 req->request_id, session->session_id );
337 osrf_app_request* first = session->request_queue;
338 if(first->request_id == req->request_id) {
339 if(first->next == NULL) { /* only one in the list */
340 session->request_queue = NULL;
342 osrf_app_request* tmp = first->next;
343 session->request_queue = tmp;
347 osrf_app_request* lead = first->next;
349 while( lead != NULL ) {
350 if(lead->request_id == req->request_id) {
351 osrf_app_request* tmp = lead->next;
361 void osrf_app_session_set_complete( osrf_app_session* session, int request_id ) {
365 osrf_app_request* req = _osrf_app_session_get_request( session, request_id );
366 if(req) req->complete = 1;
369 int osrf_app_session_request_complete( osrf_app_session* session, int request_id ) {
372 osrf_app_request* req = _osrf_app_session_get_request( session, request_id );
374 return req->complete;
378 /** Returns the app_request with the given request_id (request_id) */
379 osrf_app_request* _osrf_app_session_get_request(
380 osrf_app_session* session, int request_id ){
384 debug_handler( "App Session searching for request [%d] in request queue",request_id );
385 osrf_app_request* req = session->request_queue;
386 while( req != NULL ) {
387 if(req->request_id == request_id)
395 /** Resets the remote connection id to that of the original*/
396 void osrf_app_session_reset_remote( osrf_app_session* session ){
400 free(session->remote_id);
401 debug_handler( "App Session [%s] resetting remote it to %s",
402 session->session_id, session->orig_remote_id );
404 session->remote_id = strdup(session->orig_remote_id);
407 void osrf_app_session_set_remote( osrf_app_session* session, char* remote_id ) {
410 if( session->remote_id )
411 free(session->remote_id );
412 session->remote_id = strdup( remote_id );
415 /** pushes the given message into the result list of the app_request
416 with the given request_id */
417 int osrf_app_session_push_queue(
418 osrf_app_session* session, osrf_message* msg ){
420 if(session == NULL || msg == NULL)
423 debug_handler( "AppSession pushing result for [%d] onto request payload queue",
426 osrf_app_request* req = session->request_queue;
429 warning_handler( "app_session has no app_requests in its queue yet we have a result for [%d]", msg->thread_trace );
433 debug_handler( "The first request in the request queue has tt [%d]", req->request_id );
435 while( req != NULL ) {
436 if(req->request_id == msg->thread_trace) {
437 debug_handler( "Found app_request for tt [%d]", msg->thread_trace );
438 _osrf_app_request_push_queue( req, msg );
448 /** Attempts to connect to the remote service */
449 int osrf_app_session_connect(osrf_app_session* session){
454 int timeout = 5; /* XXX CONFIG VALUE */
456 debug_handler( "AppSession connecting to %s", session->remote_id );
458 /* defaulting to protocol 1 for now */
459 osrf_message* con_msg = osrf_message_init( CONNECT, session->thread_trace, 1 );
460 osrf_app_session_reset_remote( session );
461 session->state = OSRF_SESSION_CONNECTING;
462 if(!_osrf_app_session_send( session, con_msg ) )
465 time_t start = time(NULL);
466 time_t remaining = (time_t) timeout;
468 while( session->state != OSRF_SESSION_CONNECTED && remaining >= 0 ) {
469 osrf_app_session_queue_wait( session, remaining );
470 remaining -= (int) (time(NULL) - start);
473 if(session->state != OSRF_SESSION_CONNECTED)
481 /** Disconnects from the remote service */
482 int osrf_app_session_disconnect( osrf_app_session* session){
486 if(session->state == OSRF_SESSION_DISCONNECTED)
488 debug_handler( "AppSession disconnecting from %s", session->remote_id );
490 osrf_message* dis_msg = osrf_message_init( DISCONNECT, session->thread_trace, 1 );
491 session->state = OSRF_SESSION_DISCONNECTED;
492 _osrf_app_session_send( session, dis_msg );
494 osrf_message_free( dis_msg );
495 osrf_app_session_reset_remote( session );
499 int osrf_app_session_request_resend( osrf_app_session* session, int req_id ) {
500 osrf_app_request* req = _osrf_app_session_get_request( session, req_id );
501 return _osrf_app_request_resend( req );
504 /** Send the given message */
505 int _osrf_app_session_send( osrf_app_session* session, osrf_message* msg ){
506 if(session == NULL) return 0;
509 osrf_app_session_queue_wait( session, 0 );
510 debug_handler( "AppSession sending type %d, and thread_trace %d",
511 msg->m_type, msg->thread_trace );
513 if( (msg->m_type != CONNECT) && (msg->m_type != DISCONNECT) &&
514 (session->state != OSRF_SESSION_CONNECTED) ) {
515 if(!osrf_app_session_connect( session ))
519 char* xml = osrf_message_to_xml(msg);
521 transport_message* t_msg = message_init(
522 xml, "", session->session_id, session->remote_id, NULL );
524 debug_handler("Sending XML:\n%s", xml );
525 ret_val = client_send_message( session->transport_handle, t_msg );
526 message_free( t_msg );
531 /** Waits up to 'timeout' seconds for some data to arrive.
532 * Any data that arrives will be processed according to its
533 * payload and message type. This method will return after
534 * any data has arrived.
536 int osrf_app_session_queue_wait( osrf_app_session* session, int timeout ){
537 if(session == NULL) return 0;
539 debug_handler( "AppSession in queue_wait with timeout %d", timeout );
540 ret_val = osrf_stack_process(session->transport_handle, timeout );
544 /** Disconnects (if client) and removes the given session from the global session cache
545 * ! This free's all attached app_requests !
547 void osrf_app_session_destroy ( osrf_app_session* session ){
548 if(session == NULL) return;
550 debug_handler( "AppSession [%s] destroying self and deleting requests", session->session_id );
551 if(session->type == OSRF_SESSION_CLIENT) { /* disconnect if we're a client */
552 osrf_message* dis_msg = osrf_message_init( DISCONNECT, session->thread_trace, 1 );
553 _osrf_app_session_send( session, dis_msg );
554 //osrf_app_session_reset_remote( session );
556 //session->state = OSRF_SESSION_DISCONNECTED;
557 _osrf_app_session_remove_session(session->session_id);
558 debug_handler("AppSession [%s] removed from cache", session->session_id );
560 osrf_app_request* req;
561 while( session->request_queue != NULL ) {
562 req = session->request_queue->next;
563 _osrf_app_request_free( session->request_queue );
564 session->request_queue = req;
567 _osrf_app_session_free( session );
570 osrf_message* osrf_app_session_request_recv(
571 osrf_app_session* session, int req_id, int timeout ) {
572 if(req_id < 0 || session == NULL)
574 osrf_app_request* req = _osrf_app_session_get_request( session, req_id );
575 return _osrf_app_request_recv( req, timeout );