| /** |
| * 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.bookkeeper.stats.twitter.science; |
| |
| import com.twitter.common.stats.Rate; |
| import com.twitter.common.stats.Stats; |
| import java.util.concurrent.atomic.AtomicLong; |
| import org.apache.bookkeeper.stats.Counter; |
| |
| /** |
| * This will export the value and the rate (per sec) to {@link org.apache.bookkeeper.stats.Stats}. |
| */ |
| public class CounterImpl implements Counter { |
| // The name used to export this stat |
| private String name; |
| private AtomicLong value; |
| |
| public CounterImpl(String name) { |
| this.name = name; |
| value = new AtomicLong(0); |
| setUpStatsExport(); |
| } |
| |
| @Override |
| public synchronized void clear() { |
| value.getAndSet(0); |
| } |
| |
| @Override |
| public Long get() { |
| return value.get(); |
| } |
| |
| private void setUpStatsExport() { |
| // Export the value. |
| Stats.export(name, value); |
| // Export the rate of this value. |
| Stats.export(Rate.of(name + "_per_sec", value).build()); |
| } |
| |
| @Override |
| public void inc() { |
| value.incrementAndGet(); |
| } |
| |
| @Override |
| public void dec() { |
| value.decrementAndGet(); |
| } |
| |
| @Override |
| public void add(long delta) { |
| value.addAndGet(delta); |
| } |
| } |