| /** |
| * |
| * 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.hadoop.hbase.client; |
| |
| import org.apache.yetus.audience.InterfaceAudience; |
| |
| /** |
| * NonceGenerator interface. |
| * In general, nonce group is an ID (one per client, or region+client, or whatever) that |
| * could be used to reduce collision potential, or be used by compatible server nonce manager |
| * to optimize nonce storage and removal. See HBASE-3787. |
| */ |
| @InterfaceAudience.Private |
| public interface NonceGenerator { |
| |
| static final String CLIENT_NONCES_ENABLED_KEY = "hbase.client.nonces.enabled"; |
| |
| /** @return the nonce group (client ID) of this client manager. */ |
| long getNonceGroup(); |
| |
| /** @return New nonce. */ |
| long newNonce(); |
| } |