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"
38 * Structure for recording service
42 /* session of the service */
43 struct afb_session *session;
45 /* event listener of the service or NULL */
46 struct afb_evt_listener *listener;
48 /* on event callback for the service */
49 void (*on_event)(const char *event, struct json_object *object);
53 * Structure for requests initiated by the service
60 void (*callback)(void*, int, struct json_object*);
64 /* functions for services */
65 static void svc_on_event(void *closure, const char *event, int eventid, struct json_object *object);
66 static void svc_call(void *closure, const char *api, const char *verb, struct json_object *args,
67 void (*callback)(void*, int, struct json_object*), void *cbclosure);
69 /* the interface for services */
70 static const struct afb_service_itf service_itf = {
74 /* the interface for events */
75 static const struct afb_evt_itf evt_itf = {
76 .broadcast = svc_on_event,
80 /* functions for requests of services */
81 static void svcreq_destroy(struct afb_xreq *xreq);
82 static void svcreq_reply(struct afb_xreq *xreq, int iserror, json_object *obj);
84 /* interface for requests of services */
85 const struct afb_xreq_query_itf afb_svc_xreq_itf = {
86 .unref = svcreq_destroy,
90 /* the common session for services sharing their session */
91 static struct afb_session *common_session;
94 * Allocates a new service
96 static struct afb_svc *afb_svc_alloc(int share_session, void (*on_event)(const char *event, struct json_object *object))
100 /* allocates the svc handler */
101 svc = malloc(sizeof * svc);
105 /* instanciate the session */
107 /* session shared with other svcs */
108 if (common_session == NULL) {
109 common_session = afb_session_create (NULL, 0);
110 if (common_session == NULL)
113 svc->session = afb_session_addref(common_session);
115 /* session dedicated to the svc */
116 svc->session = afb_session_create (NULL, 0);
117 if (svc->session == NULL)
121 /* initialises the listener if needed */
122 svc->on_event = on_event;
123 if (on_event == NULL)
124 svc->listener = NULL;
126 svc->listener = afb_evt_listener_create(&evt_itf, svc);
127 if (svc->listener == NULL)
134 afb_session_unref(svc->session);
142 * Creates a new service
144 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))
149 /* allocates the svc handler */
150 svc = afb_svc_alloc(share_session, on_event);
154 /* initialises the svc now */
155 rc = init((struct afb_service){ .itf = &service_itf, .closure = svc });
162 if (svc->listener != NULL)
163 afb_evt_listener_unref(svc->listener);
164 afb_session_unref(svc->session);
171 * Creates a new service
173 struct afb_svc *afb_svc_create_v2(
175 void (*on_event)(const char *event, struct json_object *object),
176 int (*start)(const struct afb_binding_interface *interface, struct afb_service service),
177 const struct afb_binding_interface *interface)
182 /* allocates the svc handler */
183 svc = afb_svc_alloc(share_session, on_event);
187 /* initialises the svc now */
188 rc = start(interface, (struct afb_service){ .itf = &service_itf, .closure = svc });
195 if (svc->listener != NULL)
196 afb_evt_listener_unref(svc->listener);
197 afb_session_unref(svc->session);
204 * Propagates the event to the service
206 static void svc_on_event(void *closure, const char *event, int eventid, struct json_object *object)
208 struct afb_svc *svc = closure;
209 svc->on_event(event, object);
210 json_object_put(object);
214 * Initiates a call for the service
216 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)
218 struct afb_svc *svc = closure;
219 struct svc_req *svcreq;
221 /* allocates the request */
222 svcreq = calloc(1, sizeof *svcreq);
223 if (svcreq == NULL) {
224 ERROR("out of memory");
225 json_object_put(args);
226 callback(cbclosure, 1, afb_msg_json_internal_error());
230 /* initialises the request */
231 afb_xreq_init(&svcreq->xreq, &afb_svc_xreq_itf);
232 afb_context_init(&svcreq->xreq.context, svc->session, NULL);
233 svcreq->xreq.context.validated = 1;
234 svcreq->xreq.cred = afb_cred_current();
235 svcreq->xreq.api = api;
236 svcreq->xreq.verb = verb;
237 svcreq->xreq.listener = svc->listener;
238 svcreq->xreq.json = args;
239 svcreq->callback = callback;
240 svcreq->closure = cbclosure;
242 /* terminates and frees ressources if needed */
243 afb_apis_call(&svcreq->xreq);
244 afb_xreq_unref(&svcreq->xreq);
247 static void svcreq_destroy(struct afb_xreq *xreq)
249 struct svc_req *svcreq = CONTAINER_OF_XREQ(struct svc_req, xreq);
250 afb_context_disconnect(&svcreq->xreq.context);
251 json_object_put(svcreq->xreq.json);
252 afb_cred_unref(svcreq->xreq.cred);
256 static void svcreq_reply(struct afb_xreq *xreq, int iserror, json_object *obj)
258 struct svc_req *svcreq = CONTAINER_OF_XREQ(struct svc_req, xreq);
259 svcreq->callback(svcreq->closure, iserror, obj);
260 json_object_put(obj);