/*
* Copyright 2017 NAVER Corp.
*
* Licensed 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 com.navercorp.pinpoint.collector.util;
import com.google.common.util.concurrent.AtomicLongMap;
import com.google.common.util.concurrent.Uninterruptibles;
import org.junit.Assert;
import org.junit.Test;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.util.Map;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicBoolean;
import java.util.concurrent.atomic.AtomicLong;
/**
* @author emeroad
*/
public class AtomicLongMapTest {
private final Logger logger = LoggerFactory.getLogger(this.getClass());
@Test
public void testIncrement() throws Exception {
AtomicLongMap<String> cache = AtomicLongMap.create();
cache.addAndGet("a", 1L);
cache.addAndGet("a", 2L);
cache.addAndGet("b", 5L);
Map<String, Long> remove = AtomicLongMapUtils.remove(cache);
Assert.assertEquals((long) remove.get("a"), 3L);
Assert.assertEquals((long) remove.get("b"), 5L);
cache.addAndGet("a", 1L);
Map<String, Long> remove2 = AtomicLongMapUtils.remove(cache);
Assert.assertEquals((long) remove2.get("a"), 1L);
}
@Test
public void testIntegerMax() throws Exception {
AtomicLongMap<String> cache = AtomicLongMap.create();
cache.addAndGet("a", 1L);
cache.addAndGet("a", 2L);
cache.addAndGet("b", 5L);
}
@Test
public void testIntegerMin() throws Exception {
AtomicLongMap<String> cache = AtomicLongMap.create();
cache.addAndGet("a", 1L);
cache.addAndGet("a", 2L);
cache.addAndGet("b", 5L);
}
// @Test
public void testRemove_thread_safety() throws InterruptedException {
final AtomicLongMap<String> cache = AtomicLongMap.create();
final int totalThread = 5;
final ExecutorService executorService = Executors.newFixedThreadPool(totalThread);
final AtomicLong totalCounter = new AtomicLong();
final AtomicBoolean writerThread = new AtomicBoolean(true);
final AtomicBoolean removeThread = new AtomicBoolean(true);
final CountDownLatch writerLatch = new CountDownLatch(totalThread);
for (int i = 0; i < totalThread; i++) {
final int writerName = i;
executorService.execute(new Runnable() {
@Override
public void run() {
while (writerThread.get()) {
cache.incrementAndGet("aa");
cache.incrementAndGet("cc");
cache.incrementAndGet("aa");
cache.incrementAndGet("bb");
cache.incrementAndGet("bb");
cache.incrementAndGet("bb");
cache.incrementAndGet("cc");
cache.incrementAndGet("d");
totalCounter.addAndGet(8);
}
writerLatch.countDown();
logger.debug("shutdown {}", writerName);
}
});
}
final AtomicLong sumCounter = new AtomicLong();
executorService.execute(new Runnable() {
@Override
public void run() {
while (removeThread.get()) {
Map<String, Long> remove = AtomicLongMapUtils.remove(cache);
sumCounter.addAndGet(sum(remove));
logger.debug("sum:{}", remove);
Uninterruptibles.sleepUninterruptibly(10, TimeUnit.MILLISECONDS);
}
}
});
Uninterruptibles.sleepUninterruptibly(5000, TimeUnit.MILLISECONDS);
writerThread.set(false);
writerLatch.await();
Uninterruptibles.sleepUninterruptibly(100, TimeUnit.MILLISECONDS);
removeThread.set(false);
Uninterruptibles.sleepUninterruptibly(100, TimeUnit.MILLISECONDS);
executorService.shutdown();
logger.debug("total={} sum:{}", totalCounter.get(), sumCounter.get());
Assert.assertEquals("concurrent remove and increment", totalCounter.get(), sumCounter.get());
}
private long sum(Map<String, Long> remove) {
long sum = 0;
for (Long aLong : remove.values()) {
sum += aLong;
}
return sum;
}
}