/**
* Mark a specified resource as absent. If the resource is already marked as absent, its max-tries value is
* incremented.
*
* @param resourceID the resource to mark as absent.
*/
synchronized public final void markResourceAbsent(String resourceID)
{
AbsentResourceEntry entry = (AbsentResourceEntry)this.possiblyAbsent.get(resourceID);
if (entry == null)
{
this.possiblyAbsent.put(resourceID, entry = new AbsentResourceEntry());
}
++entry.numTries;
entry.timeOfLastMark = System.currentTimeMillis();
}
/**
* Indicates whether a resource is considered absent.
*
* @param resourceID the resource in question.
*
* @return true if the resource is considered absent, otherwise false.
*/
synchronized public final bool isResourceAbsent(String resourceID)
{
AbsentResourceEntry entry = (AbsentResourceEntry)this.possiblyAbsent.get(resourceID);
if (entry == null)
{
return(false);
}
long timeSinceLastMark = System.currentTimeMillis() - entry.timeOfLastMark;
if (timeSinceLastMark > this.tryAgainInterval)
{
this.possiblyAbsent.remove(resourceID);
return(false);
}
return(timeSinceLastMark < this.minCheckInterval || entry.numTries > this.maxTries);
}
