hbase-common/src/main/java/org/apache/hadoop/hbase/util/NonceKey.java

   1 /*
   2  *
   3  * Licensed to the Apache Software Foundation (ASF) under one
   4  * or more contributor license agreements.  See the NOTICE file
   5  * distributed with this work for additional information
   6  * regarding copyright ownership.  The ASF licenses this file
   7  * to you under the Apache License, Version 2.0 (the
   8  * "License"); you may not use this file except in compliance
   9  * with the License.  You may obtain a copy of the License at
  10  *
  11  *     http://www.apache.org/licenses/LICENSE-2.0
  12  *
  13  * Unless required by applicable law or agreed to in writing, software
  14  * distributed under the License is distributed on an "AS IS" BASIS,
  15  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  16  * See the License for the specific language governing permissions and
  17  * limitations under the License.
  18  */
  19 package org.apache.hadoop.hbase.util;
  20
  21 import org.apache.yetus.audience.InterfaceAudience;
  22
  23  /**
  24    * This implementation is not smart and just treats nonce group and nonce as random bits.
  25    */
  26   // TODO: we could use pure byte arrays, but then we wouldn't be able to use hash map.
  27 @InterfaceAudience.Private
  28 public class NonceKey {
  29   private long group;
  30   private long nonce;
  31
  32   public NonceKey(long group, long nonce) {
  33     this.group = group;
  34     this.nonce = nonce;
  35   }
  36
  37   @Override
  38   public boolean equals(Object obj) {
  39     if (obj == null || !(obj instanceof NonceKey)) {
  40       return false;
  41     }
  42     NonceKey nk = ((NonceKey)obj);
  43     return this.nonce == nk.nonce && this.group == nk.group;
  44   }
  45
  46   @Override
  47   public int hashCode() {
  48     return (int)((group >> 32) ^ group ^ (nonce >> 32) ^ nonce);
  49   }
  50
  51   @Override
  52   public String toString() {
  53     return "[" + group + ":" + nonce + "]";
  54   }
  55
  56   public long getNonceGroup() {
  57     return group;
  58   }
  59
  60   public long getNonce() {
  61     return nonce;
  62   }
  63 }