solr/core/src/java/org/apache/solr/handler/component/ReplicaSource.java

/*
 * 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.solr.handler.component;

import java.util.List;

/**
 * A source of slices and corresponding replicas required to execute a request.
 *
 * @lucene.experimental
 */
interface ReplicaSource {
  /**
   * @return the list of slice names
   */
  List<String> getSliceNames();

  /**
   * Get the list of replica urls for a 0-indexed slice number.
   */
  List<String> getReplicasBySlice(int sliceNumber);

  /**
   * @return the count of slices
   */
  int getSliceCount();
}