content: /*
   * 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.distributedlog.callback;
  
  import java.util.List;
  import org.apache.distributedlog.LogSegmentMetadata;
  
  
  /**
   * Listener on log segments changes for a given stream used by {@link org.apache.distributedlog.BKLogReadHandler}.
   */
  public interface LogSegmentListener {
  
      /**
       * Notified when <i>segments</i> updated. The new sorted log segments
       * list is returned in this method.
       *
       * @param segments
       *          updated list of segments.
       */
      void onSegmentsUpdated(List<LogSegmentMetadata> segments);
  
      /**
       * Notified when the log stream is deleted.
       */
      void onLogStreamDeleted();
  }
  