1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one or more
3 * contributor license agreements. See the NOTICE file distributed with
4 * this work for additional information regarding copyright ownership.
5 * The ASF licenses this file to you under the Apache License, Version 2.0
6 * (the "License"); you may not use this file except in compliance with
7 * the License. You may obtain a copy of the License at
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 */
17 package org.apache.hadoop.hbase.client;
18
19 import org.apache.hadoop.hbase.util.EnvironmentEdgeManager;
20
21 /**
22 * Tracks the amount of time remaining for an operation.
23 */
24 class RetryingTimeTracker {
25
26 private long globalStartTime = -1;
27
28 public RetryingTimeTracker start() {
29 if (this.globalStartTime < 0) {
30 this.globalStartTime = EnvironmentEdgeManager.currentTime();
31 }
32 return this;
33 }
34
35 public int getRemainingTime(int callTimeout) {
36 if (callTimeout <= 0) {
37 return 0;
38 } else {
39 if (callTimeout == Integer.MAX_VALUE) {
40 return Integer.MAX_VALUE;
41 }
42 int remainingTime = (int) (
43 callTimeout -
44 (EnvironmentEdgeManager.currentTime() - this.globalStartTime));
45 if (remainingTime < 1) {
46 // If there is no time left, we're trying anyway. It's too late.
47 // 0 means no timeout, and it's not the intent here. So we secure both cases by
48 // resetting to the minimum.
49 remainingTime = 1;
50 }
51 return remainingTime;
52 }
53 }
54
55 public long getStartTime() {
56 return this.globalStartTime;
57 }
58 }