/*
* 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.tests.unit.util;
import org.apache.activemq.artemis.tests.util.ActiveMQTestBase;
import org.apache.activemq.artemis.utils.SoftValueHashMap;
import org.junit.Test;
public class SoftValueMapTest extends ActiveMQTestBase {
// Constants -----------------------------------------------------
// Attributes ----------------------------------------------------
// Static --------------------------------------------------------
// Constructors --------------------------------------------------
// Public --------------------------------------------------------
@Test
public void testEvictions() {
forceGC();
long maxMemory = Runtime.getRuntime().maxMemory() - Runtime.getRuntime().freeMemory();
// each buffer will be 1/10th of the maxMemory
int bufferSize = (int) (maxMemory / 100);
SoftValueHashMap<Long, Value> softCache = new SoftValueHashMap<>(100);
final int MAX_ELEMENTS = 1000;
for (long i = 0; i < MAX_ELEMENTS; i++) {
softCache.put(i, new Value(new byte[bufferSize]));
}
assertTrue(softCache.size() < MAX_ELEMENTS);
System.out.println("SoftCache.size " + softCache.size());
System.out.println("Soft cache has " + softCache.size() + " elements");
}
@Test
public void testEvictionsLeastUsed() {
forceGC();
SoftValueHashMap<Long, Value> softCache = new SoftValueHashMap<>(200);
for (long i = 0; i < 100; i++) {
Value v = new Value(new byte[1]);
v.setLive(true);
softCache.put(i, v);
}
for (long i = 100; i < 200; i++) {
Value v = new Value(new byte[1]);
softCache.put(i, v);
}
assertNotNull(softCache.get(100L));
softCache.put(300L, new Value(new byte[1]));
// these are live, so they shouldn't go
for (long i = 0; i < 100; i++) {
assertNotNull(softCache.get(i));
}
// this was accessed, so it shouldn't go
assertNotNull(softCache.get(100L));
// this is the next one, so it should go
assertNull(softCache.get(101L));
System.out.println("SoftCache.size " + softCache.size());
System.out.println("Soft cache has " + softCache.size() + " elements");
}
@Test
public void testEvictOldestElement() {
Value one = new Value(new byte[100]);
Value two = new Value(new byte[100]);
Value three = new Value(new byte[100]);
SoftValueHashMap<Integer, Value> softCache = new SoftValueHashMap<>(2);
softCache.put(3, three);
softCache.put(2, two);
softCache.put(1, one);
assertNull(softCache.get(3));
assertEquals(two, softCache.get(2));
assertEquals(one, softCache.get(1));
}
class Value implements SoftValueHashMap.ValueCache {
byte[] payload;
boolean live;
Value(byte[] payload) {
this.payload = payload;
}
/* (non-Javadoc)
* @see org.apache.activemq.artemis.utils.SoftValueHashMap.ValueCache#isLive()
*/
@Override
public boolean isLive() {
return live;
}
public void setLive(boolean live) {
this.live = live;
}
}
// Package protected ---------------------------------------------
// Protected -----------------------------------------------------
// Private -------------------------------------------------------
// Inner classes -------------------------------------------------
}