java/sca/modules/node-impl-osgi/src/main/java/org/apache/tuscany/sca/osgi/remoteserviceadmin/ExportReference.java


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/*
 * Copyright (c) OSGi Alliance (2008, 2009). 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.apache.tuscany.sca.osgi.remoteserviceadmin;

import org.osgi.framework.ServiceReference;

/**
 * An Export Reference associates a service with a local endpoint.
 * 
 * The Export Reference can be used to reference an exported service. When the 
 * service is no longer exported, all methods must return <code>null</code>;
 * 
 * @ThreadSafe
 */
public interface ExportReference {
    /**
     * Return the service being exported.
     * 
     * @return The service being exported, must be <code>null</code> when this
     *         registration is unregistered.
     */
    ServiceReference getExportedService();

    /**
     * Return the Endpoint Description that is created for this registration.
     * 
     * @return the local Endpoint Description
     */
    EndpointDescription getEndpointDescription();
}