/**
* Removes expired elements.
*
* <p>Note that the DiskStore cannot efficiently expire based on TTI. It does it on TTL. However
* any gets out of the DiskStore are check for both before return.
*
* @noinspection SynchronizeOnNonFinalField
*/
public void expireElements() {
final long now = System.currentTimeMillis();
// Clean up the spool
synchronized (spoolLock) {
for (Iterator iterator = spool.values().iterator(); iterator.hasNext(); ) {
final Element element = (Element) iterator.next();
if (element.isExpired()) {
// An expired element
if (LOG.isDebugEnabled()) {
LOG.debug(name + "Cache: Removing expired spool element " + element.getObjectKey());
}
iterator.remove();
notifyExpiryListeners(element);
}
}
}
Element element = null;
RegisteredEventListeners listeners = cache.getCacheEventNotificationService();
synchronized (diskElements) {
// Clean up disk elements
for (Iterator iterator = diskElements.entrySet().iterator(); iterator.hasNext(); ) {
final Map.Entry entry = (Map.Entry) iterator.next();
final DiskElement diskElement = (DiskElement) entry.getValue();
if (now >= diskElement.expiryTime) {
// An expired element
if (LOG.isDebugEnabled()) {
LOG.debug(
name
+ "Cache: Removing expired spool element "
+ entry.getKey()
+ " from Disk Store");
}
iterator.remove();
// only load the element from the file if there is a listener interested in hearing about
// its expiration
if (listeners.hasCacheEventListeners()) {
try {
element = loadElementFromDiskElement(diskElement);
notifyExpiryListeners(element);
} catch (Exception exception) {
LOG.error(
name
+ "Cache: Could not remove disk store entry for "
+ entry.getKey()
+ ". Error was "
+ exception.getMessage(),
exception);
}
}
freeBlock(diskElement);
}
}
}
}
private void notifyEvictionListeners(DiskElement diskElement) {
RegisteredEventListeners listeners = cache.getCacheEventNotificationService();
// only load the element from the file if there is a listener interested in hearing about its
// expiration
if (listeners.hasCacheEventListeners()) {
Element element = null;
try {
element = loadElementFromDiskElement(diskElement);
cache.getCacheEventNotificationService().notifyElementEvicted(element, false);
} catch (Exception exception) {
LOG.error(
name
+ "Cache: Could not notify disk store eviction of "
+ element.getObjectKey()
+ ". Error was "
+ exception.getMessage(),
exception);
}
}
}
