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diff --git a/src/components/include/connection_handler/connection_handler_observer.h b/src/components/include/connection_handler/connection_handler_observer.h
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+/*
+ * Copyright (c) 2014, Ford Motor Company
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * Redistributions of source code must retain the above copyright notice, this
+ * list of conditions and the following disclaimer.
+ *
+ * Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following
+ * disclaimer in the documentation and/or other materials provided with the
+ * distribution.
+ *
+ * Neither the name of the Ford Motor Company nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef SRC_COMPONENTS_CONNECTION_HANDLER_INCLUDE_CONNECTION_HANDLER_CONNECTION_HANDLER_OBSERVER_H_
+#define SRC_COMPONENTS_CONNECTION_HANDLER_INCLUDE_CONNECTION_HANDLER_CONNECTION_HANDLER_OBSERVER_H_
+
+#include "connection_handler/device.h"
+#include "connection_handler/connection.h"
+#include "connection_handler/connection_handler.h"
+#include "protocol/service_type.h"
+
+#ifdef ENABLE_SECURITY
+#include "security_manager/ssl_context.h"
+#endif  // ENABLE_SECURITY
+
+/**
+ * \namespace connection_handler
+ * \brief SmartDeviceLink connection_handler namespace.
+ */
+namespace connection_handler {
+
+/**
+ * \class ConnectionHandlerObserver
+ * \brief ConnectionHandlerObserver class
+ */
+class ConnectionHandlerObserver {
+ public:
+  /**
+   * \brief Available devices list updated.
+   *
+   * Called when device scanning initiated with scanForNewDevices
+   * is completed.
+   *
+   * \param DeviceList New list of available devices.
+   **/
+  virtual void OnDeviceListUpdated(
+      const connection_handler::DeviceMap& device_list) = 0;
+
+  /**
+   * @brief Reaction to "Find new applications" request
+   */
+  virtual void OnFindNewApplicationsRequest() = 0;
+
+  /**
+   * \brief Removes device.
+   *
+   * Called when device has been removed from a list.
+   *
+   * \param DeviceHandle Handle of removed device.
+   **/
+  virtual void RemoveDevice(
+      const connection_handler::DeviceHandle& device_handle) = 0;
+
+  /**
+   * \brief Callback function used by connection_handler
+   * when Mobile Application initiates start of new service.
+   * \param deviceHandle Device identifier within which session has to be
+   * started.
+   * \param sessionKey Key of started session.
+   * \param type Established service type
+   */
+  virtual bool OnServiceStartedCallback(
+      const connection_handler::DeviceHandle& device_handle,
+      const int32_t& session_key,
+      const protocol_handler::ServiceType& type) = 0;
+
+  /**
+   * \brief Callback function used by connection_handler
+   * when Mobile Application initiates service ending.
+   * \param session_key Key of session which should be ended
+   * \param type Type of service which should be ended
+   * \param close_reson Service close reason
+   */
+  virtual void OnServiceEndedCallback(
+      const int32_t& session_key,
+      const protocol_handler::ServiceType& type,
+      const connection_handler::CloseSessionReason& close_reason) = 0;
+
+#ifdef ENABLE_SECURITY
+  virtual security_manager::SSLContext::HandshakeContext GetHandshakeContext(
+      uint32_t key) const = 0;
+#endif  // ENABLE_SECURITY
+ protected:
+  /**
+   * \brief Destructor
+   */
+  virtual ~ConnectionHandlerObserver() {}
+};
+}  // namespace connection_handler
+
+#endif  // SRC_COMPONENTS_CONNECTION_HANDLER_INCLUDE_CONNECTION_HANDLER_CONNECTION_HANDLER_OBSERVER_H_