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+// Copyright (C) 2017-2021 Internet Systems Consortium, Inc. ("ISC")
+//
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this
+// file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+#ifndef CTRL_AGENT_RESPONSE_CREATOR_H
+#define CTRL_AGENT_RESPONSE_CREATOR_H
+
+#include <agent/ca_command_mgr.h>
+#include <http/response_creator.h>
+#include <boost/shared_ptr.hpp>
+
+namespace isc {
+namespace agent {
+
+class CtrlAgentResponseCreator;
+
+/// @brief Pointer to the @ref CtrlAgentResponseCreator.
+typedef boost::shared_ptr<CtrlAgentResponseCreator> CtrlAgentResponseCreatorPtr;
+
+/// @brief Concrete implementation of the HTTP response creator used
+/// by the Control Agent.
+///
+/// See the documentation of the @ref isc::http::HttpResponseCreator for
+/// the basic information how HTTP response creators are utilized by
+/// the libkea-http library to generate HTTP responses.
+///
+/// This creator expects that received requests are encapsulated in the
+/// @ref isc::http::PostHttpRequestJson objects. The generated responses
+/// are encapsulated in the HttpResponseJson objects.
+///
+/// This class uses @ref CtrlAgentCommandMgr singleton to process commands
+/// conveyed in the HTTP body. The JSON responses returned by the manager
+/// are placed in the body of the generated HTTP responses.
+class CtrlAgentResponseCreator : public http::HttpResponseCreator {
+public:
+
+    /// @brief Create a new request.
+    ///
+    /// This method creates a bare instance of the @ref
+    /// isc::http::PostHttpRequestJson.
+    ///
+    /// @return Pointer to the new instance of the @ref
+    /// isc::http::PostHttpRequestJson.
+    virtual http::HttpRequestPtr createNewHttpRequest() const;
+
+    /// @brief Creates stock HTTP response.
+    ///
+    /// @param request Pointer to an object representing HTTP request.
+    /// @param status_code Status code of the response.
+    /// @return Pointer to an @ref isc::http::HttpResponseJson object
+    /// representing stock HTTP response.
+    virtual http::HttpResponsePtr
+    createStockHttpResponse(const http::HttpRequestPtr& request,
+                            const http::HttpStatusCode& status_code) const;
+
+private:
+
+    /// @brief Creates unfinalized stock HTTP response.
+    ///
+    /// The unfinalized response is the response that can't be sent over the
+    /// wire until @c finalize() is called, which commits the contents of the
+    /// message body.
+    ///
+    /// @param request Pointer to an object representing HTTP request.
+    /// @param status_code Status code of the response.
+    /// @return Pointer to an @ref isc::http::HttpResponseJson object
+    /// representing stock HTTP response.
+   http::HttpResponsePtr
+   createStockHttpResponseInternal(const http::HttpRequestPtr& request,
+                                   const http::HttpStatusCode& status_code) const;
+
+    /// @brief Creates implementation specific HTTP response.
+    ///
+    /// @param request Pointer to an object representing HTTP request.
+    /// @return Pointer to an object representing HTTP response.
+    virtual http::HttpResponsePtr
+    createDynamicHttpResponse(http::HttpRequestPtr request);
+};
+
+} // end of namespace isc::agent
+} // end of namespace isc
+
+#endif