| /** |
| * 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.distributedlog.rate; |
| |
| import com.twitter.common.stats.Rate; |
| import com.twitter.util.TimerTask; |
| import com.twitter.util.Timer; |
| import com.twitter.util.Time; |
| import java.util.concurrent.atomic.AtomicLong; |
| |
| class SampledMovingAverageRate implements MovingAverageRate { |
| private final Rate rate; |
| private final AtomicLong total; |
| |
| private double value; |
| |
| public SampledMovingAverageRate(int intervalSecs) { |
| this.total = new AtomicLong(0); |
| this.rate = Rate.of("Ignore", total) |
| .withWindowSize(intervalSecs) |
| .build(); |
| this.value = 0; |
| } |
| |
| @Override |
| public double get() { |
| return value; |
| } |
| |
| @Override |
| public void add(long amount) { |
| total.getAndAdd(amount); |
| } |
| |
| @Override |
| public void inc() { |
| add(1); |
| } |
| |
| void sample() { |
| value = rate.doSample(); |
| } |
| } |