/**
* 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.activemq.artemis.core.server.files;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.PrintStream;
import java.nio.file.FileStore;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.ScheduledThreadPoolExecutor;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicBoolean;
import java.util.concurrent.atomic.AtomicInteger;
import org.apache.activemq.artemis.tests.util.ActiveMQTestBase;
import org.apache.activemq.artemis.utils.ReusableLatch;
import org.junit.After;
import org.junit.Assert;
import org.junit.Before;
import org.junit.Test;
public class FileStoreMonitorTest extends ActiveMQTestBase {
private ScheduledExecutorService scheduledExecutorService;
private ExecutorService executorService;
@Before
public void startScheduled() {
scheduledExecutorService = new ScheduledThreadPoolExecutor(5);
executorService = Executors.newSingleThreadExecutor();
}
@After
public void stopScheduled() {
scheduledExecutorService.shutdown();
scheduledExecutorService = null;
executorService.shutdown();
}
@Test
public void testSimpleTick() throws Exception {
File garbageFile = new File(getTestDirfile(), "garbage.bin");
FileOutputStream garbage = new FileOutputStream(garbageFile);
BufferedOutputStream bufferedOutputStream = new BufferedOutputStream(garbage);
PrintStream out = new PrintStream(bufferedOutputStream);
// This is just to make sure there is at least something on the device.
// If the testsuite is running with an empty tempFS, it would return 0 and the assertion would fail.
for (int i = 0; i < 100; i++) {
out.println("Garbage " + i);
}
bufferedOutputStream.close();
final AtomicInteger over = new AtomicInteger(0);
final AtomicInteger under = new AtomicInteger(0);
final AtomicInteger tick = new AtomicInteger(0);
FileStoreMonitor.Callback callback = new FileStoreMonitor.Callback() {
@Override
public void tick(FileStore store, double usage) {
tick.incrementAndGet();
System.out.println("tick:: " + store + " usage::" + usage);
}
@Override
public void over(FileStore store, double usage) {
over.incrementAndGet();
System.out.println("over:: " + store + " usage::" + usage);
}
@Override
public void under(FileStore store, double usage) {
under.incrementAndGet();
System.out.println("under:: " + store + " usage::" + usage);
}
};
final AtomicBoolean fakeReturn = new AtomicBoolean(false);
FileStoreMonitor storeMonitor = new FileStoreMonitor(scheduledExecutorService, executorService, 100, TimeUnit.MILLISECONDS, 0.999) {
@Override
protected double calculateUsage(FileStore store) throws IOException {
if (fakeReturn.get()) {
return 1f;
} else {
return super.calculateUsage(store);
}
}
};
storeMonitor.addCallback(callback);
storeMonitor.addStore(getTestDirfile());
storeMonitor.tick();
Assert.assertEquals(0, over.get());
Assert.assertEquals(1, tick.get());
Assert.assertEquals(1, under.get());
fakeReturn.set(true);
storeMonitor.tick();
Assert.assertEquals(1, over.get());
Assert.assertEquals(2, tick.get());
Assert.assertEquals(1, under.get());
}
@Test
public void testScheduler() throws Exception {
FileStoreMonitor storeMonitor = new FileStoreMonitor(scheduledExecutorService, executorService, 20, TimeUnit.MILLISECONDS, 0.9);
final ReusableLatch latch = new ReusableLatch(5);
storeMonitor.addStore(getTestDirfile());
storeMonitor.addCallback(new FileStoreMonitor.Callback() {
@Override
public void tick(FileStore store, double usage) {
System.out.println("TickS::" + usage);
latch.countDown();
}
@Override
public void over(FileStore store, double usage) {
}
@Override
public void under(FileStore store, double usage) {
}
});
storeMonitor.start();
Assert.assertTrue(latch.await(1, TimeUnit.SECONDS));
storeMonitor.stop();
latch.setCount(1);
Assert.assertFalse(latch.await(100, TimeUnit.MILLISECONDS));
// FileStoreMonitor monitor = new FileStoreMonitor()
}
}