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/*
 * Copyright (c) OSGi Alliance (2009, 2013). 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.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License 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.
 */

package org.osgi.service.remoteserviceadmin;

import java.util.Map;
import org.osgi.framework.ServiceReference;

/**
 * An Export Registration associates a service to a local endpoint.
 * 
 * The Export Registration can be used to delete the endpoint associated with an
 * this registration. It is created with the
 * {@link RemoteServiceAdmin#exportService(ServiceReference,Map)} method.
 * 
 * When this Export Registration has been closed, all methods must return
 * {@code null}.
 * 
 * @ThreadSafe
 * @noimplement
 * @author $Id: 64285705bd33387e990c67c3555f9d80e8a7bfb9 $
 */
public interface ExportRegistration {
	/**
	 * Return the Export Reference for the exported service.
	 * 
	 * @return The Export Reference for this registration.
	 * @throws IllegalStateException When this registration was not properly
	 *         initialized. See {@link #getException()}.
	 */
	ExportReference getExportReference();

	/**
	 * Delete the local endpoint and disconnect any remote distribution
	 * providers. After this method returns, all methods must return
	 * {@code null}.
	 * 
	 * This method has no effect when this registration has already been closed
	 * or is being closed.
	 */
	void close();

	/**
	 * Return the exception for any error during the export process.
	 * 
	 * If the Remote Service Admin for some reasons is unable to properly
	 * initialize this registration, then it must return an exception from this
	 * method. If no error occurred, this method must return {@code null}.
	 * 
	 * The error must be set before this Export Registration is returned.
	 * Asynchronously occurring errors must be reported to the log.
	 * 
	 * @return The exception that occurred during the initialization of this
	 *         registration or {@code null} if no exception occurred.
	 */
	Throwable getException();
}