@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<Long, Value>(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<Long, Value>(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");
}
public int getCacheSize() {
synchronized (softCache) {
return softCache.size();
}
}