2 * Copyright (C) 2016, 2017 "IoT.bzh"
3 * Author: José Bollo <jose.bollo@iot.bzh>
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at
9 * http://www.apache.org/licenses/LICENSE-2.0
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
22 #include <json-c/json.h>
24 #include <afb/afb-req-itf.h>
25 #include <afb/afb-service-itf.h>
27 #include "afb-session.h"
28 #include "afb-context.h"
30 #include "afb-msg-json.h"
37 * Structure for recording service
41 /* session of the service */
42 struct afb_session *session;
44 /* event listener of the service or NULL */
45 struct afb_evt_listener *listener;
47 /* on event callback for the service */
48 void (*on_event)(const char *event, struct json_object *object);
52 * Structure for requests initiated by the service
59 struct json_object *args;
60 void (*callback)(void*, int, struct json_object*);
67 /* functions for services */
68 static void svc_on_event(void *closure, const char *event, int eventid, struct json_object *object);
69 static void svc_call(void *closure, const char *api, const char *verb, struct json_object *args,
70 void (*callback)(void*, int, struct json_object*), void *cbclosure);
72 /* the interface for services */
73 static const struct afb_service_itf service_itf = {
77 /* the interface for events */
78 static const struct afb_evt_itf evt_itf = {
79 .broadcast = svc_on_event,
83 /* functions for requests of services */
84 static struct json_object *svcreq_json(void *closure);
85 static void svcreq_destroy(void *closure);
86 static void svcreq_reply(void *closure, int iserror, json_object *obj);
88 /* interface for requests of services */
89 const struct afb_xreq_query_itf afb_svc_xreq_itf = {
90 .unref = svcreq_destroy,
95 /* the common session for services sharing their session */
96 static struct afb_session *common_session;
99 * Allocates a new service
101 static struct afb_svc *afb_svc_alloc(int share_session, void (*on_event)(const char *event, struct json_object *object))
105 /* allocates the svc handler */
106 svc = malloc(sizeof * svc);
110 /* instanciate the session */
112 /* session shared with other svcs */
113 if (common_session == NULL) {
114 common_session = afb_session_create (NULL, 0);
115 if (common_session == NULL)
118 svc->session = afb_session_addref(common_session);
120 /* session dedicated to the svc */
121 svc->session = afb_session_create (NULL, 0);
122 if (svc->session == NULL)
126 /* initialises the listener if needed */
127 svc->on_event = on_event;
128 if (on_event == NULL)
129 svc->listener = NULL;
131 svc->listener = afb_evt_listener_create(&evt_itf, svc);
132 if (svc->listener == NULL)
139 afb_session_unref(svc->session);
147 * Creates a new service
149 struct afb_svc *afb_svc_create(int share_session, int (*init)(struct afb_service service), void (*on_event)(const char *event, struct json_object *object))
154 /* allocates the svc handler */
155 svc = afb_svc_alloc(share_session, on_event);
159 /* initialises the svc now */
160 rc = init((struct afb_service){ .itf = &service_itf, .closure = svc });
167 if (svc->listener != NULL)
168 afb_evt_listener_unref(svc->listener);
169 afb_session_unref(svc->session);
176 * Creates a new service
178 struct afb_svc *afb_svc_create_v2(
180 void (*on_event)(const char *event, struct json_object *object),
181 int (*start)(const struct afb_binding_interface *interface, struct afb_service service),
182 const struct afb_binding_interface *interface)
187 /* allocates the svc handler */
188 svc = afb_svc_alloc(share_session, on_event);
192 /* initialises the svc now */
193 rc = start(interface, (struct afb_service){ .itf = &service_itf, .closure = svc });
200 if (svc->listener != NULL)
201 afb_evt_listener_unref(svc->listener);
202 afb_session_unref(svc->session);
209 * Propagates the event to the service
211 static void svc_on_event(void *closure, const char *event, int eventid, struct json_object *object)
213 struct afb_svc *svc = closure;
214 svc->on_event(event, object);
215 json_object_put(object);
219 * Initiates a call for the service
221 static void svc_call(void *closure, const char *api, const char *verb, struct json_object *args, void (*callback)(void*, int, struct json_object*), void *cbclosure)
223 struct afb_svc *svc = closure;
224 struct svc_req *svcreq;
226 /* allocates the request */
227 svcreq = calloc(1, sizeof *svcreq);
228 if (svcreq == NULL) {
229 ERROR("out of memory");
230 json_object_put(args);
231 callback(cbclosure, 1, afb_msg_json_internal_error());
235 /* initialises the request */
236 afb_context_init(&svcreq->xreq.context, svc->session, NULL);
237 svcreq->xreq.context.validated = 1;
238 svcreq->xreq.refcount = 1;
239 svcreq->xreq.query = svcreq;
240 svcreq->xreq.queryitf = &afb_svc_xreq_itf;
241 svcreq->xreq.api = api;
242 svcreq->xreq.verb = verb;
243 svcreq->xreq.listener = svc->listener;
245 svcreq->callback = callback;
246 svcreq->closure = cbclosure;
249 /* terminates and frees ressources if needed */
250 afb_apis_call(&svcreq->xreq);
251 afb_xreq_unref(&svcreq->xreq);
254 static void svcreq_destroy(void *closure)
256 struct svc_req *svcreq = closure;
257 afb_context_disconnect(&svcreq->xreq.context);
258 json_object_put(svcreq->args);
262 static struct json_object *svcreq_json(void *closure)
264 struct svc_req *svcreq = closure;
268 static void svcreq_reply(void *closure, int iserror, json_object *obj)
270 struct svc_req *svcreq = closure;
271 svcreq->callback(svcreq->closure, iserror, obj);
272 json_object_put(obj);