How to use

CacheCleaner

in

com.wizzardo.tools.cache

private CacheCleaner() {
  setDaemon(true);
  setName(this.getClass().getName());
}

public Cache(String name, long ttlSec, Computable<? super K, ? extends V> computable) {
  this.name = name != null ? name : "Cache-" + NAME_COUNTER.incrementAndGet();
  this.ttl = ttlSec * 1000;
  this.computable = computable;
  statistics = createStatistics();
  timings.put(ttl, new WeakReference<TimingsHolder<K, V>>(timingsHolder = new TimingsHolder<K, V>(ttl)));
  CacheCleaner.addCache(this);
}

private void updateTimingCache(final Holder<K, V> key) {
  TimingsHolder<K, V> timingsHolder = key.getTimingsHolder();
  if (timingsHolder == null || timingsHolder.ttl <= 0)
    return;
  long timing = timingsHolder.ttl + System.currentTimeMillis();
  key.setValidUntil(timing);
  CacheCleaner.updateWakeUp(timing);
  timingsHolder.timings.add(new TimingEntry<Holder<K, V>>(key, timing));
}

@Test
public void test_cache_iterable() {
  Cache<String, String> cache;
  cache = new Cache<String, String>(1);
  cache = new Cache<String, String>(1);
  cache = new Cache<String, String>(1);
  int before = CacheCleaner.size();
  Assert.assertTrue(before >= 3);
  System.gc();
  int i = 0;
  for (Cache c : CacheCleaner.iterable()) {
    i++;
  }
  Assert.assertEquals(1, i);
  Assert.assertEquals(1, CacheCleaner.size());
}

@Test
public void destroy_test() throws InterruptedException {
  System.gc();
  Cache<String, String> cache = new Cache<String, String>(1, new Computable<String, String>() {
    @Override
    public String compute(String s) {
      return s.toUpperCase();
    }
  });
  cache.get("foo");
  Assert.assertEquals(1, cache.size());
  Thread.sleep(1020);
  Assert.assertEquals(0, cache.size());
  Assert.assertEquals(1, CacheCleaner.size());
  cache.get("foo");
  Assert.assertEquals(1, cache.size());
  cache.destroy();
  Assert.assertEquals(0, cache.size());
  Assert.assertEquals(true, cache.isDestroyed());
  Assert.assertEquals(1, CacheCleaner.size());
  Thread.sleep(1020);
  Assert.assertEquals(0, CacheCleaner.size());
}

public Cache(String name, long ttlSec, Computable<? super K, ? extends V> computable) {
  this.name = name != null ? name : "Cache-" + NAME_COUNTER.incrementAndGet();
  this.ttl = ttlSec * 1000;
  this.computable = computable;
  statistics = createStatistics();
  timings.put(ttl, new WeakReference<TimingsHolder<K, V>>(timingsHolder = new TimingsHolder<K, V>(ttl)));
  CacheCleaner.addCache(this);
}

private void updateTimingCache(final Holder<K, V> key) {
  TimingsHolder<K, V> timingsHolder = key.getTimingsHolder();
  if (timingsHolder == null || timingsHolder.ttl <= 0)
    return;
  long timing = timingsHolder.ttl + System.currentTimeMillis();
  key.setValidUntil(timing);
  CacheCleaner.updateWakeUp(timing);
  timingsHolder.timings.add(new TimingEntry<Holder<K, V>>(key, timing));
}

private CacheCleaner() {
  setDaemon(true);
  setName(this.getClass().getName());
}