protected internal virtual void ensureCapacityLimit()
{
if (size() > Capacity)
{
IList <HalResourceCacheEntry> resources = new List <HalResourceCacheEntry>(cache.Values);
NavigableSet <HalResourceCacheEntry> remainingResources = new SortedSet <HalResourceCacheEntry>(COMPARATOR);
// remove expired resources
foreach (HalResourceCacheEntry resource in resources)
{
if (expired(resource))
{
remove(resource.Id);
}
else
{
remainingResources.add(resource);
}
if (size() <= Capacity)
{
// abort if capacity is reached
return;
}
}
// if still exceed capacity remove oldest
while (remainingResources.size() > capacity)
{
HalResourceCacheEntry resourceToRemove = remainingResources.pollFirst();
if (resourceToRemove != null)
{
remove(resourceToRemove.Id);
}
else
{
break;
}
}
}
}
public virtual object get(string id)
{
HalResourceCacheEntry cacheEntry = cache[id];
if (cacheEntry != null)
{
if (expired(cacheEntry))
{
remove(cacheEntry.Id);
return(null);
}
else
{
return(cacheEntry.Resource);
}
}
else
{
return(null);
}
}
public virtual void put(string id, object resource)
{
cache[id] = new HalResourceCacheEntry(id, resource);
ensureCapacityLimit();
}
protected internal virtual bool expired(HalResourceCacheEntry entry)
{
return(entry.CreateTime + secondsToLive * 1000 < ClockUtil.CurrentTime.Ticks);
}