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 void (*callback)(void*, int, struct json_object*);
63 /* functions for services */
64 static void svc_on_event(void *closure, const char *event, int eventid, struct json_object *object);
65 static void svc_call(void *closure, const char *api, const char *verb, struct json_object *args,
66 void (*callback)(void*, int, struct json_object*), void *cbclosure);
68 /* the interface for services */
69 static const struct afb_service_itf service_itf = {
73 /* the interface for events */
74 static const struct afb_evt_itf evt_itf = {
75 .broadcast = svc_on_event,
79 /* functions for requests of services */
80 static void svcreq_destroy(struct afb_xreq *xreq);
81 static void svcreq_reply(struct afb_xreq *xreq, int iserror, json_object *obj);
83 /* interface for requests of services */
84 const struct afb_xreq_query_itf afb_svc_xreq_itf = {
85 .unref = svcreq_destroy,
89 /* the common session for services sharing their session */
90 static struct afb_session *common_session;
93 * Allocates a new service
95 static struct afb_svc *afb_svc_alloc(int share_session, void (*on_event)(const char *event, struct json_object *object))
99 /* allocates the svc handler */
100 svc = malloc(sizeof * svc);
104 /* instanciate the session */
106 /* session shared with other svcs */
107 if (common_session == NULL) {
108 common_session = afb_session_create (NULL, 0);
109 if (common_session == NULL)
112 svc->session = afb_session_addref(common_session);
114 /* session dedicated to the svc */
115 svc->session = afb_session_create (NULL, 0);
116 if (svc->session == NULL)
120 /* initialises the listener if needed */
121 svc->on_event = on_event;
122 if (on_event == NULL)
123 svc->listener = NULL;
125 svc->listener = afb_evt_listener_create(&evt_itf, svc);
126 if (svc->listener == NULL)
133 afb_session_unref(svc->session);
141 * Creates a new service
143 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))
148 /* allocates the svc handler */
149 svc = afb_svc_alloc(share_session, on_event);
153 /* initialises the svc now */
154 rc = init((struct afb_service){ .itf = &service_itf, .closure = svc });
161 if (svc->listener != NULL)
162 afb_evt_listener_unref(svc->listener);
163 afb_session_unref(svc->session);
170 * Creates a new service
172 struct afb_svc *afb_svc_create_v2(
174 void (*on_event)(const char *event, struct json_object *object),
175 int (*start)(const struct afb_binding_interface *interface, struct afb_service service),
176 const struct afb_binding_interface *interface)
181 /* allocates the svc handler */
182 svc = afb_svc_alloc(share_session, on_event);
186 /* initialises the svc now */
187 rc = start(interface, (struct afb_service){ .itf = &service_itf, .closure = svc });
194 if (svc->listener != NULL)
195 afb_evt_listener_unref(svc->listener);
196 afb_session_unref(svc->session);
203 * Propagates the event to the service
205 static void svc_on_event(void *closure, const char *event, int eventid, struct json_object *object)
207 struct afb_svc *svc = closure;
208 svc->on_event(event, object);
209 json_object_put(object);
213 * Initiates a call for the service
215 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)
217 struct afb_svc *svc = closure;
218 struct svc_req *svcreq;
220 /* allocates the request */
221 svcreq = calloc(1, sizeof *svcreq);
222 if (svcreq == NULL) {
223 ERROR("out of memory");
224 json_object_put(args);
225 callback(cbclosure, 1, afb_msg_json_internal_error());
229 /* initialises the request */
230 afb_xreq_init(&svcreq->xreq, &afb_svc_xreq_itf);
231 afb_context_init(&svcreq->xreq.context, svc->session, NULL);
232 svcreq->xreq.context.validated = 1;
233 svcreq->xreq.api = api;
234 svcreq->xreq.verb = verb;
235 svcreq->xreq.listener = svc->listener;
236 svcreq->xreq.json = args;
237 svcreq->callback = callback;
238 svcreq->closure = cbclosure;
240 /* terminates and frees ressources if needed */
241 afb_apis_call(&svcreq->xreq);
242 afb_xreq_unref(&svcreq->xreq);
245 static void svcreq_destroy(struct afb_xreq *xreq)
247 struct svc_req *svcreq = CONTAINER_OF_XREQ(struct svc_req, xreq);
248 afb_context_disconnect(&svcreq->xreq.context);
249 json_object_put(svcreq->xreq.json);
253 static void svcreq_reply(struct afb_xreq *xreq, int iserror, json_object *obj)
255 struct svc_req *svcreq = CONTAINER_OF_XREQ(struct svc_req, xreq);
256 svcreq->callback(svcreq->closure, iserror, obj);
257 json_object_put(obj);