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* Copyright (c) 2009-2012 jMonkeyEngine
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*
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*
* * Redistributions in binary form must reproduce the above copyright
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* may be used to endorse or promote products derived from this software
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*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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*/
package jme3test.asset;
import com.jme3.asset.AssetKey;
import com.jme3.asset.AssetProcessor;
import com.jme3.asset.CloneableAssetProcessor;
import com.jme3.asset.CloneableSmartAsset;
import com.jme3.asset.cache.AssetCache;
import com.jme3.asset.cache.SimpleAssetCache;
import com.jme3.asset.cache.WeakRefAssetCache;
import com.jme3.asset.cache.WeakRefCloneAssetCache;
import java.util.ArrayList;
import java.util.List;
public class TestAssetCache {
/**
* Counter for asset keys
*/
private static int counter = 0;
/**
* Dummy data is an asset having 10 KB to put a dent in the garbage collector
*/
private static class DummyData implements CloneableSmartAsset {
private AssetKey key;
private byte[] data = new byte[10 * 1024];
@Override
public Object clone(){
try {
DummyData clone = (DummyData) super.clone();
clone.data = data.clone();
return clone;
} catch (CloneNotSupportedException ex) {
throw new AssertionError();
}
}
public byte[] getData(){
return data;
}
public AssetKey getKey() {
return key;
}
public void setKey(AssetKey key) {
this.key = key;
}
}
/**
* Dummy key is indexed by a generated ID
*/
private static class DummyKey extends AssetKey<DummyData> implements Cloneable {
private int id = 0;
public DummyKey(){
super(".");
id = counter++;
}
public DummyKey(int id){
super(".");
this.id = id;
}
@Override
public int hashCode(){
return id;
}
@Override
public boolean equals(Object other){
return ((DummyKey)other).id == id;
}
@Override
public DummyKey clone(){
return new DummyKey(id);
}
@Override
public String toString() {
return "ID=" + id;
}
}
private static void runTest(boolean cloneAssets, boolean smartCache, boolean keepRefs, int limit) {
counter = 0;
List<Object> refs = new ArrayList<Object>(limit);
AssetCache cache;
AssetProcessor proc = null;
if (cloneAssets) {
proc = new CloneableAssetProcessor();
}
if (smartCache) {
if (cloneAssets) {
cache = new WeakRefCloneAssetCache();
} else {
cache = new WeakRefAssetCache();
}
} else {
cache = new SimpleAssetCache();
}
System.gc();
System.gc();
System.gc();
System.gc();
long memory = Runtime.getRuntime().freeMemory();
while (counter < limit){
// Create a key
DummyKey key = new DummyKey();
// Create some data
DummyData data = new DummyData();
// Post process the data before placing it in the cache
if (proc != null){
data = (DummyData) proc.postProcess(key, data);
}
if (data.key != null){
// Keeping a hard reference to the key in the cache
// means the asset will never be collected => bug
throw new AssertionError();
}
cache.addToCache(key, data);
// Get the asset from the cache
AssetKey<DummyData> keyToGet = key.clone();
// NOTE: Commented out because getFromCache leaks the original key
// DummyData someLoaded = (DummyData) cache.getFromCache(keyToGet);
// if (someLoaded != data){
// // Failed to get the same asset from the cache => bug
// // Since a hard reference to the key is kept,
// // it cannot be collected at this point.
// throw new AssertionError();
// }
// Clone the asset
if (proc != null){
// Data is now the clone!
data = (DummyData) proc.createClone(data);
if (smartCache) {
// Registering a clone is only needed
// if smart cache is used.
cache.registerAssetClone(keyToGet, data);
// The clone of the asset must have the same key as the original
// otherwise => bug
if (data.key != key){
throw new AssertionError();
}
}
}
// Keep references to the asset => *should* prevent
// collections of the asset in the cache thus causing
// an out of memory error.
if (keepRefs){
// Prevent the saved references from taking too much memory ..
if (cloneAssets) {
data.data = null;
}
refs.add(data);
}
if ((counter % 1000) == 0){
long newMem = Runtime.getRuntime().freeMemory();
System.out.println("Allocated objects: " + counter);
System.out.println("Allocated memory: " + ((memory - newMem)/(1024*1024)) + " MB" );
memory = newMem;
}
}
}
public static void main(String[] args){
// Test cloneable smart asset
System.out.println("====== Running Cloneable Smart Asset Test ======");
runTest(true, true, false, 100000);
// Test non-cloneable smart asset
System.out.println("====== Running Non-cloneable Smart Asset Test ======");
runTest(false, true, false, 100000);
}
}