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.bookkeeper.clients.impl.internal.api;
  
  import static com.google.common.base.Preconditions.checkArgument;
  
  import java.util.Collections;
  import java.util.NavigableMap;
  import lombok.Data;
  import lombok.EqualsAndHashCode;
  import lombok.RequiredArgsConstructor;
  import lombok.ToString;
  import org.apache.bookkeeper.stream.proto.RangeKeyType;
  import org.apache.bookkeeper.stream.proto.RangeProperties;
  
  /**
   * The active ranges for a given stream at a given time.
   */
  @Data
  @EqualsAndHashCode
  @ToString
  @RequiredArgsConstructor
  public abstract class StreamRanges<T> {
  
      public static HashStreamRanges ofHash(RangeKeyType keyType,
                                            NavigableMap<Long, RangeProperties> ranges) {
          checkArgument(RangeKeyType.HASH == keyType,
              "Only hash routing is supported now. %s is not supported.", keyType);
          NavigableMap<Long, RangeProperties> readOnlyRanges = Collections.unmodifiableNavigableMap(ranges);
          long maxRangeId = 0L;
          for (RangeProperties props : ranges.values()) {
              maxRangeId = Math.max(maxRangeId, props.getRangeId());
          }
          return new HashStreamRanges(readOnlyRanges, maxRangeId);
      }
  
      private final RangeKeyType keyType;
      private final NavigableMap<T, RangeProperties> ranges;
      // the id (which is basically the max id among the ranges)
      // that tracks the changes to the range list of a stream.
      // the id here can be easily used for syncing the range list by
      // just comparing the id seen at client side and the id seen
      // at server side.
      private final long maxRangeId;
  
  }
  