| /** |
| * 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.quotas; |
| |
| import org.apache.yetus.audience.InterfaceAudience; |
| import org.apache.yetus.audience.InterfaceStability; |
| import org.apache.hadoop.hbase.util.EnvironmentEdgeManager; |
| |
| /** |
| * With this limiter resources will be refilled only after a fixed interval of time. |
| */ |
| @InterfaceAudience.Private |
| @InterfaceStability.Evolving |
| public class FixedIntervalRateLimiter extends RateLimiter { |
| private long nextRefillTime = -1L; |
| |
| @Override |
| public long refill(long limit) { |
| final long now = EnvironmentEdgeManager.currentTime(); |
| if (now < nextRefillTime) { |
| return 0; |
| } |
| nextRefillTime = now + super.getTimeUnitInMillis(); |
| return limit; |
| } |
| |
| @Override |
| public long getWaitInterval(long limit, long available, long amount) { |
| if (nextRefillTime == -1) { |
| return 0; |
| } |
| final long now = EnvironmentEdgeManager.currentTime(); |
| final long refillTime = nextRefillTime; |
| return refillTime - now; |
| } |
| |
| // This method is for strictly testing purpose only |
| @Override |
| public void setNextRefillTime(long nextRefillTime) { |
| this.nextRefillTime = nextRefillTime; |
| } |
| |
| @Override |
| public long getNextRefillTime() { |
| return this.nextRefillTime; |
| } |
| } |