SynchronizedMessageRequestQueue.h

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/*
 * Copyright 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 ALEXA_CLIENT_SDK_ACL_INCLUDE_ACL_TRANSPORT_SYNCHRONIZEDMESSAGEREQUESTQUEUE_H_
#define ALEXA_CLIENT_SDK_ACL_INCLUDE_ACL_TRANSPORT_SYNCHRONIZEDMESSAGEREQUESTQUEUE_H_

#include <deque>
#include <memory>
#include <unordered_map>

#include <AVSCommon/AVS/MessageRequest.h>
#include <AVSCommon/Utils/functional/hash.h>
#include <ACL/Transport/MessageRequestQueue.h>
#include "ACL/Transport/MessageRequestQueueInterface.h"

namespace alexaClientSDK {
namespace acl {

class SynchronizedMessageRequestQueue : public MessageRequestQueueInterface {
public:
    SynchronizedMessageRequestQueue() = default;

    ~SynchronizedMessageRequestQueue() override;

    void enqueueRequest(std::shared_ptr<avsCommon::avs::MessageRequest> messageRequest) override;
    avsCommon::utils::Optional<std::chrono::time_point<std::chrono::steady_clock>> peekRequestTime() override;
    std::shared_ptr<avsCommon::avs::MessageRequest> dequeueOldestRequest() override;
    std::shared_ptr<avsCommon::avs::MessageRequest> dequeueSendableRequest() override;
    bool isMessageRequestAvailable() const override;
    void setWaitingForSendAcknowledgement() override;
    void clearWaitingForSendAcknowledgement() override;
    bool empty() const override;
    void clear() override;

private:
    mutable std::mutex m_mutex;

    MessageRequestQueue m_requestQueue;
};

}  // namespace acl
}  // namespace alexaClientSDK

#endif  // ALEXA_CLIENT_SDK_ACL_INCLUDE_ACL_TRANSPORT_SYNCHRONIZEDMESSAGEREQUESTQUEUE_H_