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-rw-r--r--src/plugins/capabilities/core/src/SubscriberForwarder.cpp139
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diff --git a/src/plugins/capabilities/core/src/SubscriberForwarder.cpp b/src/plugins/capabilities/core/src/SubscriberForwarder.cpp
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+/*
+ * Copyright 2018-2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License").
+ * You may not use this file except in compliance with the License.
+ * A copy of the License is located at
+ *
+ * http://aws.amazon.com/apache2.0/
+ *
+ * or in the "license" file accompanying this file. This file is distributed
+ * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
+ * express or implied. See the License for the specific language governing
+ * permissions and limitations under the License.
+ */
+#include "capabilities/core/include/SubscriberForwarder.h"
+
+static string TAG = "vshlcapabilities::capabilities::SubscriberForwarder";
+
+using Level = vshlcapabilities::common::interfaces::ILogger::Level;
+
+namespace vshlcapabilities {
+namespace capabilities {
+namespace core {
+
+// Create a SubscriberForwarder.
+std::shared_ptr<SubscriberForwarder> SubscriberForwarder::create(
+ shared_ptr<vshlcapabilities::common::interfaces::ILogger> logger,
+ shared_ptr<vshlcapabilities::common::interfaces::IAFBApi> afbApi,
+ shared_ptr<vshlcapabilities::common::interfaces::ICapability> capability) {
+ if (logger == nullptr) {
+ return nullptr;
+ }
+
+ if (afbApi == nullptr) {
+ logger->log(Level::ERROR, TAG, "Failed to create SubscriberForwarder: AFB API null");
+ return nullptr;
+ }
+
+ if (capability == nullptr) {
+ logger->log(Level::ERROR, TAG, "Failed to create SubscriberForwarder: Capability null");
+ return nullptr;
+ }
+
+ auto subscriberForwarder =
+ std::shared_ptr<SubscriberForwarder>(new SubscriberForwarder(logger, afbApi, capability));
+ return subscriberForwarder;
+}
+
+SubscriberForwarder::SubscriberForwarder(
+ shared_ptr<vshlcapabilities::common::interfaces::ILogger> logger,
+ shared_ptr<vshlcapabilities::common::interfaces::IAFBApi> afbApi,
+ shared_ptr<vshlcapabilities::common::interfaces::ICapability> capability) :
+ mAfbApi(afbApi),
+ mLogger(logger),
+ mCapability(capability) {
+ createEvents();
+}
+
+SubscriberForwarder::~SubscriberForwarder() {
+ mUpstreamEventsMap.clear();
+ mDownstreamEventsMap.clear();
+}
+
+void SubscriberForwarder::createEvents() {
+ if (!mCapability) {
+ mLogger->log(Level::NOTICE, TAG, "Create Events failed. No capability assigned.");
+ return;
+ }
+
+ // Upstream events
+ auto upstreamEvents = mCapability->getUpstreamMessages();
+ for (auto upstreamEventName : upstreamEvents) {
+ auto it = mUpstreamEventsMap.find(upstreamEventName);
+ if (it == mUpstreamEventsMap.end() && mAfbApi) {
+ // create a new event and add it to the map.
+ shared_ptr<common::interfaces::IAFBApi::IAFBEvent> event = mAfbApi->createEvent(upstreamEventName);
+ if (event == nullptr) {
+ mLogger->log(Level::ERROR, TAG, "Failed to create upstream event: " + upstreamEventName);
+ } else {
+ mUpstreamEventsMap.insert(make_pair(upstreamEventName, event));
+ }
+ }
+ }
+
+ // Downstream events
+ auto downstreamEvents = mCapability->getDownstreamMessages();
+ for (auto downstreamEventName : downstreamEvents) {
+ auto it = mDownstreamEventsMap.find(downstreamEventName);
+ if (it == mDownstreamEventsMap.end() && mAfbApi) {
+ // create a new event and add it to the map.
+ shared_ptr<common::interfaces::IAFBApi::IAFBEvent> event = mAfbApi->createEvent(downstreamEventName);
+ if (event == nullptr) {
+ mLogger->log(Level::ERROR, TAG, "Failed to create downstream event: " + downstreamEventName);
+ } else {
+ mDownstreamEventsMap.insert(make_pair(downstreamEventName, event));
+ }
+ }
+ }
+}
+
+bool SubscriberForwarder::forwardMessage(const string action, json_object* payload) {
+ auto upstreamEventIt = mUpstreamEventsMap.find(action);
+ if (upstreamEventIt != mUpstreamEventsMap.end()) {
+ mLogger->log(Level::NOTICE, TAG, "Publishing upstream event: " + action);
+ upstreamEventIt->second->publishEvent(payload);
+ return true;
+ }
+
+ auto downstreamEventIt = mDownstreamEventsMap.find(action);
+ if (downstreamEventIt != mDownstreamEventsMap.end()) {
+ mLogger->log(Level::NOTICE, TAG, "Publishing downstream event: " + action);
+ downstreamEventIt->second->publishEvent(payload);
+ return true;
+ }
+
+ mLogger->log(Level::NOTICE, TAG, "Failed to publish upstream event: " + action);
+ return false;
+}
+
+bool SubscriberForwarder::subscribe(vshlcapabilities::common::interfaces::IAFBRequest& request, const string action) {
+ auto upstreamEventIt = mUpstreamEventsMap.find(action);
+ if (upstreamEventIt != mUpstreamEventsMap.end()) {
+ mLogger->log(Level::NOTICE, TAG, "Subscribing to upstream event: " + action);
+ return upstreamEventIt->second->subscribe(request);
+ }
+
+ auto downstreamEventIt = mDownstreamEventsMap.find(action);
+ if (downstreamEventIt != mDownstreamEventsMap.end()) {
+ mLogger->log(Level::NOTICE, TAG, "Subscribing to downstream event: " + action);
+ return downstreamEventIt->second->subscribe(request);
+ }
+
+ mLogger->log(Level::NOTICE, TAG, "Failed to subscribe to upstream event: " + action);
+ return false;
+}
+
+} // namespace core
+} // namespace capabilities
+} // namespace vshl