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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.
+ */
+#ifndef VSHL_CAPABILITIES_CORE_MESSAGECHANNEL_H_
+#define VSHL_CAPABILITIES_CORE_MESSAGECHANNEL_H_
+
+#include <memory>
+
+#include "capabilities/core/include/PublisherForwarder.h"
+#include "capabilities/core/include/SubscriberForwarder.h"
+#include "interfaces/afb/IAFBApi.h"
+#include "interfaces/capabilities/ICapability.h"
+#include "interfaces/utilities/logging/ILogger.h"
+
+using namespace std;
+
+namespace vshlcapabilities {
+namespace capabilities {
+namespace core {
+/*
+ * MessageChannel has one end as publisher forwarder and the other end
+ * as subscriber forwarder.
+ */
+class MessageChannel {
+public:
+ // Create a MessageChannel.
+ static std::shared_ptr<MessageChannel>
+ create(shared_ptr<vshlcapabilities::common::interfaces::ILogger> logger,
+ shared_ptr<vshlcapabilities::common::interfaces::IAFBApi> afbApi,
+ shared_ptr<vshlcapabilities::common::interfaces::ICapability> capability);
+
+ // Sends the message
+ bool publish(const string action, json_object* payload);
+
+ // Subscribe
+ bool subscribe(vshlcapabilities::common::interfaces::IAFBRequest &request,
+ const string action);
+
+ // Destructor
+ virtual ~MessageChannel() = default;
+
+private:
+ // Constructor
+ MessageChannel(shared_ptr<vshlcapabilities::common::interfaces::ILogger> logger,
+ shared_ptr<vshlcapabilities::common::interfaces::IAFBApi> afbApi,
+ shared_ptr<vshlcapabilities::common::interfaces::ICapability> capability);
+
+ // Forwarders
+ shared_ptr<PublisherForwarder> mPublisherForwarder;
+ shared_ptr<SubscriberForwarder> mSubscriberForwarder;
+};
+
+} // namespace core
+} // namespace capabilities
+} // namespace vshl
+
+#endif // VSHL_CAPABILITIES_CORE_MESSAGECHANNEL_H_