Check in demonstration POI bindingjellyfish_9.99.1jellyfish/9.99.19.99.1

Bug-AGL: SPEC-3291

Signed-off-by: Shoichi Hiramatsu <hiramatsu_sh@micware.co.jp>
Change-Id: Iac3488f240f7ae1c19fa6c650bcfcd240e88224a

1 files changed, 172 insertions, 0 deletions

diff --git a/binding/src/verbs.cpp b/binding/src/verbs.cpp
new file mode 100644
index 0000000..f71698a
--- /dev/null
+++ b/binding/src/verbs.cpp
@@ -0,0 +1,172 @@
+#ifndef _GNU_SOURCE
+#define _GNU_SOURCE
+#endif
+
+#include "binding-api.h"
+
+#include <map>
+#include <mutex>
+#include <string>
+#include <stdexcept>
+
+extern "C" {
+// json-c/json.h
+#include <json.h>
+}
+
+static std::mutex mut;
+static int32_t gRequestId = 0;
+static std::map<decltype(gRequestId), json_object *> gRequests;
+
+static inline bool pushRequest(json_object *reqJson) {
+    // Guard `gRequests' and `gRequestId'
+    std::lock_guard<std::mutex> lock(mut);
+
+    gRequestId++;
+
+    json_object *reqToSvc = json_object_new_object();
+    json_object_object_add(reqToSvc, POIAPI_BINDING_PARAMETER_KEY_REQUEST_ID, json_object_new_string(std::to_string(gRequestId).c_str()));
+
+    // reqJson(1), reqToSvc(1)
+    // Associate `reqJson' to `reqToSvc' but the refcount of `reqJson' is not incremented
+    json_object_object_add(reqToSvc, POIAPI_BINDING_PARAMETER_KEY_REQUEST_OBJECT, reqJson);
+
+    // reqJson(1->2->1), reqToSvc(1->2->1)
+    // Each refcount of `reqJson' or `reqToSvc' is decrement, and we increment the refcounts before the decrementations
+    int rc = afb_event_push(gEventRequestReceived, json_object_get(reqToSvc));
+    if (rc == -1 || rc == 0) { // Discard the request if the event was not pushed or there are no subscriber
+        // reqJson(1->2), reqToSvc(1->1)
+        json_object_get(reqJson);
+        // reqJson(2->1), reqToSvc(1->0)
+        // Delete reqToSvc
+        json_object_put(reqToSvc);
+        return false;
+    }
+
+    // reqJson(1->2), reqToSvc(1)
+    // Increment the refcount of `refJson' to preserve `reqToSvc'.
+    // The refcount of reqJson will be decremented in afb_req_success
+    json_object_get(reqJson);
+    gRequests.emplace(gRequestId, reqToSvc);
+
+    return true;
+}
+
+// Verb: request-processed
+void send_request(afb_req_t req)
+{
+    json_object *reqJson = afb_req_json(req);
+    if (!pushRequest(reqJson)) {
+        AFB_REQ_ERROR(req, "Failed to push an event");
+        // reqJson(1->0)
+        afb_req_fail(req, "error", "Failed to push an event");
+        return;
+    }
+
+    json_object *response = json_object_new_object();
+    json_object_object_add(response, POIAPI_BINDING_PARAMETER_KEY_REQUEST_ID, json_object_new_string(std::to_string(gRequestId).c_str()));
+
+    // `response' will be released
+    // The refcount of `reqJson' will be 1; `reqJson' belonges to a element of `gRequests'
+    afb_req_success(req, response, POIAPI_BINDING_VERB_SEND_REQUEST);
+}
+
+// Verb: request-processed
+void request_processed(afb_req_t req)
+{
+    json_object *resultJson = afb_req_json(req);
+    json_object *ridj;
+    json_object_object_get_ex(resultJson, POIAPI_BINDING_PARAMETER_KEY_REQUEST_ID, &ridj);
+    if (!json_object_is_type(ridj, json_type_string)) {
+        AFB_REQ_ERROR(req, "Received response was bad formatted: %s", json_object_to_json_string_ext(afb_req_json(req), JSON_C_TO_STRING_PRETTY));
+        afb_req_fail(req, "error", "Received response was badly formatted");
+        return;
+    }
+
+    const char *rids = json_object_get_string(ridj);
+    uint32_t rid;
+    try {
+        rid = std::stoi(rids);
+    }
+    catch (const std::invalid_argument &e) {
+        AFB_REQ_ERROR(req, "Received response was bad formatted: %s", json_object_to_json_string_ext(afb_req_json(req), JSON_C_TO_STRING_PRETTY));
+        afb_req_fail(req, "error", "Received response was badly formatted");
+        return;
+    }
+    catch (const std::out_of_range &e) {
+        AFB_REQ_ERROR(req, "Received response was bad formatted: %s", json_object_to_json_string_ext(afb_req_json(req), JSON_C_TO_STRING_PRETTY));
+        afb_req_fail(req, "error", "Received response was badly formatted");
+        return;
+    }
+
+    decltype(gRequests)::iterator it = gRequests.find(rid);
+    if (it == gRequests.end()) {
+        AFB_REQ_ERROR(req, "Received an invalid request id: %d", rid);
+        afb_req_fail_f(req, "error", "Received an invalid request id: %d %s", rid, rids);
+        return;
+    }
+
+    // Preserve `resultJson' because afb_req_success use it
+    if (afb_event_push(gEventResponseReceived, json_object_get(resultJson)) == -1) {
+        AFB_REQ_ERROR(req, "Failed to push an event");
+        afb_req_fail(req, "error", "Failed to push an event");
+        return;
+    }
+
+    afb_req_success(req, nullptr, nullptr);
+
+    // Guard `gRequests'
+    std::lock_guard<std::mutex> lock(mut);
+
+    // Delete the processed request data
+    json_object *processedReq = it->second;
+    gRequests.erase(it);
+    int rc = json_object_put(processedReq);
+    if (rc != 1) {
+        AFB_REQ_ERROR(req, "bad-ref-count %d:%s", rc, POIAPI_BINDING_VERB_REQUEST_PROCESSED);
+    }
+}
+
+// Verb: subscribe-requests
+void subscribe_requests(afb_req_t req)
+{
+    if (afb_req_subscribe(req, gEventRequestReceived) == 0) {
+        afb_req_success(req, nullptr, nullptr);
+    } else {
+        AFB_REQ_ERROR(req, "Failed to %s", POIAPI_BINDING_VERB_SUBSCRIBE_REQUESTS);
+        afb_req_fail_f(req, "error", "Failed to %s", POIAPI_BINDING_VERB_SUBSCRIBE_REQUESTS);
+    }
+}
+
+// Verb: unsubscribe-requests
+void unsubscribe_requests(afb_req_t req)
+{
+    if (afb_req_unsubscribe(req, gEventRequestReceived) == 0) {
+        afb_req_success(req, nullptr, nullptr);
+    } else {
+        AFB_REQ_ERROR(req, "Failed to %s", POIAPI_BINDING_VERB_UNSUBSCRIBE_REQUESTS);
+        afb_req_fail_f(req, "error", "Failed to %s", POIAPI_BINDING_VERB_UNSUBSCRIBE_REQUESTS);
+    }
+}
+
+// Verb: subscribe-responses
+void subscribe_responses(afb_req_t req)
+{
+    if (afb_req_subscribe(req, gEventResponseReceived) == 0) {
+        afb_req_success(req, nullptr, nullptr);
+    } else {
+        AFB_REQ_ERROR(req, "Failed to %s", POIAPI_BINDING_VERB_SUBSCRIBE_RESPONSES);
+        afb_req_fail_f(req, "error", "Failed to %s", POIAPI_BINDING_VERB_SUBSCRIBE_RESPONSES);
+    }
+}
+
+// Verb: unsubscribe-responses
+void unsubscribe_responses(afb_req_t req)
+{
+    if (afb_req_unsubscribe(req, gEventResponseReceived) == 0) {
+        afb_req_success(req, nullptr, nullptr);
+    } else {
+        AFB_REQ_ERROR(req, "Failed to %s", POIAPI_BINDING_VERB_UNSUBSCRIBE_RESPONSES);
+        afb_req_fail_f(req, "error", "Failed to %s", POIAPI_BINDING_VERB_UNSUBSCRIBE_RESPONSES);
+    }
+}