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.client;
20
21 import org.apache.hadoop.hbase.classification.InterfaceAudience;
22
23 /**
24 * NonceGenerator interface.
25 * In general, nonce group is an ID (one per client, or region+client, or whatever) that
26 * could be used to reduce collision potential, or be used by compatible server nonce manager
27 * to optimize nonce storage and removal. See HBASE-3787.
28 */
29 @InterfaceAudience.Private
30 public interface NonceGenerator {
31
32 /** @return the nonce group (client ID) of this client manager. */
33 public long getNonceGroup();
34
35 /** @return New nonce. */
36 public long newNonce();
37 }