/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.extensibility;

import java.util.Set;

/**
 * A SPI that allows different implementations of discovering service declarations
 */
public interface ServiceDiscoverer {
    /**
     * Discover the service descriptors by name
     * @param serviceName The name of the service
     * @param firstOnly A flag to indicate if only the first instance is to be discovered
     *  
     * @return A set of service descriptors
     */
    Set<ServiceDeclaration> discover(String serviceName, boolean firstOnly);

}