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-rw-r--r--src/plugins/capabilities/CapabilityMessagingService.cpp117
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diff --git a/src/plugins/capabilities/CapabilityMessagingService.cpp b/src/plugins/capabilities/CapabilityMessagingService.cpp
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+++ b/src/plugins/capabilities/CapabilityMessagingService.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/CapabilityMessagingService.h"
+
+#include "capabilities/core/include/PublisherForwarder.h"
+#include "capabilities/core/include/SubscriberForwarder.h"
+
+static string TAG = "vshl::capabilities::CapabilityMessagingService";
+
+using Level = vshl::common::interfaces::ILogger::Level;
+
+namespace vshl {
+namespace capabilities {
+
+// Create a CapabilityMessagingService.
+unique_ptr<CapabilityMessagingService> CapabilityMessagingService::create(
+ shared_ptr<vshl::common::interfaces::ILogger> logger,
+ shared_ptr<vshl::common::interfaces::IAFBApi> afbApi) {
+ if (logger == nullptr) {
+ return nullptr;
+ }
+
+ if (afbApi == nullptr) {
+ logger->log(Level::ERROR, TAG, "Failed to create CapabilityMessagingService: AFB API null");
+ return nullptr;
+ }
+
+ auto capabilityMessageService =
+ std::unique_ptr<CapabilityMessagingService>(new CapabilityMessagingService(logger, afbApi));
+ return capabilityMessageService;
+}
+
+CapabilityMessagingService::~CapabilityMessagingService() {
+ mMessageChannelsMap.clear();
+}
+
+CapabilityMessagingService::CapabilityMessagingService(
+ shared_ptr<vshl::common::interfaces::ILogger> logger,
+ shared_ptr<vshl::common::interfaces::IAFBApi> afbApi) :
+ mAfbApi(afbApi),
+ mLogger(logger) {
+}
+
+// Subscribe to capability specific messages.
+bool CapabilityMessagingService::subscribe(
+ vshl::common::interfaces::IAFBRequest& request,
+ shared_ptr<common::interfaces::ICapability> capability,
+ const string action) {
+ auto capabilityName = capability->getName();
+
+ if (capabilityName.empty()) {
+ mLogger->log(Level::ERROR, TAG, "Failed to subscribe to message. Invalid input.");
+ return false;
+ }
+
+ auto messageChannel = getMessageChannel(capability);
+ return messageChannel->subscribe(request, action);
+}
+
+// Publish capability messages.
+bool CapabilityMessagingService::publish(
+ shared_ptr<common::interfaces::ICapability> capability,
+ const string action,
+ const string payload) {
+ auto capabilityName = capability->getName();
+
+ if (capabilityName.empty()) {
+ mLogger->log(Level::ERROR, TAG, "Failed to publish message. Invalid input.");
+ return false;
+ }
+
+ auto messageChannelIt = mMessageChannelsMap.find(capabilityName);
+ if (messageChannelIt == mMessageChannelsMap.end()) {
+ mLogger->log(
+ Level::ERROR,
+ TAG,
+ "Failed to publish message. Message channel doesn't exist for capability " + capabilityName);
+ return false;
+ }
+
+ return messageChannelIt->second->publish(action, payload);
+}
+
+shared_ptr<vshl::capabilities::core::MessageChannel> CapabilityMessagingService::getMessageChannel(
+ shared_ptr<common::interfaces::ICapability> capability) {
+ auto capabilityName = capability->getName();
+
+ if (capabilityName.empty()) {
+ mLogger->log(Level::ERROR, TAG, "Failed to create message channel. Invalid input.");
+ return nullptr;
+ }
+
+ auto messageChannelIt = mMessageChannelsMap.find(capabilityName);
+ if (messageChannelIt == mMessageChannelsMap.end()) {
+ mLogger->log(Level::INFO, TAG, "Creating new message channel for capability: " + capabilityName);
+ auto messageChannel = vshl::capabilities::core::MessageChannel::create(mLogger, mAfbApi, capability);
+ mMessageChannelsMap.insert(make_pair(capabilityName, messageChannel));
+ return messageChannel;
+ }
+
+ return messageChannelIt->second;
+}
+
+} // namespace capabilities
+} // namespace vshl