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.hadoop.hbase.HConstants;
22 import org.apache.hadoop.hbase.classification.InterfaceAudience;
23
24 /**
25 * This implementation is not smart and just treats nonce group and nonce as random bits.
26 */
27 // TODO: we could use pure byte arrays, but then we wouldn't be able to use hash map.
28 @InterfaceAudience.Private
29 public class NonceKey {
30 private long group;
31 private long nonce;
32
33 public NonceKey(long group, long nonce) {
34 assert nonce != HConstants.NO_NONCE;
35 this.group = group;
36 this.nonce = nonce;
37 }
38
39 @Override
40 public boolean equals(Object obj) {
41 if (obj == null || !(obj instanceof NonceKey)) {
42 return false;
43 }
44 NonceKey nk = ((NonceKey)obj);
45 return this.nonce == nk.nonce && this.group == nk.group;
46 }
47
48 @Override
49 public int hashCode() {
50 return (int)((group >> 32) ^ group ^ (nonce >> 32) ^ nonce);
51 }
52
53 @Override
54 public String toString() {
55 return "[" + group + ":" + nonce + "]";
56 }
57
58 public long getNonceGroup() {
59 return group;
60 }
61
62 public long getNonce() {
63 return nonce;
64 }
65 }