/**
* An element is expired if the expiration time as given by {@link #getExpirationTime()} is in the
* past.
*
* <p>This method in addition propogates the default TTI/TTL values of the supplied cache into
* this element.
*
* @param config config to take default parameters from
* @return true if the Element is expired, otherwise false. If no lifespan has been set for the
* Element it is considered not able to expire.
* @see #getExpirationTime()
*/
public boolean isExpired(CacheConfiguration config) {
if (cacheDefaultLifespan) {
if (config.isEternal()) {
timeToIdle = 0;
timeToLive = 0;
} else {
timeToIdle = TimeUtil.convertTimeToInt(config.getTimeToIdleSeconds());
timeToLive = TimeUtil.convertTimeToInt(config.getTimeToLiveSeconds());
}
}
return isExpired();
}
/**
* Returns the expiration time based on time to live. If this element also has a time to idle
* setting, the expiry time will vary depending on whether the element is accessed.
*
* @return the time to expiration
*/
public long getExpirationTime() {
if (!isLifespanSet() || isEternal()) {
return Long.MAX_VALUE;
}
long expirationTime = 0;
long ttlExpiry = creationTime + TimeUtil.toMillis(getTimeToLive());
long mostRecentTime = Math.max(creationTime, lastAccessTime);
long ttiExpiry = mostRecentTime + TimeUtil.toMillis(getTimeToIdle());
if (getTimeToLive() != 0 && (getTimeToIdle() == 0 || lastAccessTime == 0)) {
expirationTime = ttlExpiry;
} else if (getTimeToLive() == 0) {
expirationTime = ttiExpiry;
} else {
expirationTime = Math.min(ttlExpiry, ttiExpiry);
}
return expirationTime;
}
/** Custom serialization read logic */
private void readObject(ObjectInputStream in) throws IOException, ClassNotFoundException {
in.defaultReadObject();
creationTime = TimeUtil.toMillis(in.readInt());
lastAccessTime = TimeUtil.toMillis(in.readInt());
}
/** Custom serialization write logic */
private void writeObject(ObjectOutputStream out) throws IOException {
out.defaultWriteObject();
out.writeInt(TimeUtil.toSecs(creationTime));
out.writeInt(TimeUtil.toSecs(lastAccessTime));
}