Examples of org.apache.fulcrum.cache.RefreshableCachedObject

org.apache.fulcrum.cache.RefreshableCachedObject
The idea of the RefreshableCachedObject is that, rather than removing items from the cache when they become stale, we'll tell them to refresh themselves instead. That way they'll always be in the cache, and the code to refresh them will be run by the background thread rather than by a user request thread. You can also set a TTL (Time To Live) for the object. This way, if the object hasn't been touched for the TTL period, then it will be removed from the cache. This extends CachedObject and provides a method for refreshing the cached object, and resetting its expire time. @author Nissim Karpenstein @author Henning P. Schmiedehausen @version $Id: RefreshableCachedObject.java 670326 2008-06-22 09:31:47Z tv $

        }
        if (obj.isStale())
        {
            if (obj instanceof RefreshableCachedObject)
            {
                RefreshableCachedObject rco = (RefreshableCachedObject) obj;
                if (rco.isUntouched())
                {
                    throw new ObjectExpiredException();
                }
                // Refresh Object
                rco.refresh();
                if (rco.isStale())
                {
                    throw new ObjectExpiredException();
                }
            }
            else
            {
                // Expired.
                throw new ObjectExpiredException();
            }
        }
        if (obj instanceof RefreshableCachedObject)
        {
            // notify it that it's being accessed.
            RefreshableCachedObject rco = (RefreshableCachedObject) obj;
            rco.touch();
        }
        return obj;
    }

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            {
                String key = (String) e.nextElement();
                CachedObject co = (CachedObject) this.cache.get(key);
                if (co instanceof RefreshableCachedObject)
                {
                    RefreshableCachedObject rco = (RefreshableCachedObject) co;
                    if (rco.isUntouched())
                    {
                        this.cache.remove(key);
                    }
                    else if (rco.isStale())
                    {
                        // to prolong holding the lock on this object
                        refreshThese.add(key);
                    }
                }
                else if (co.isStale())
                {
                    this.cache.remove(key);
                }
            }
        }
        for (Iterator i = refreshThese.iterator(); i.hasNext();)
        {
            String key = (String) i.next();
            CachedObject co = (CachedObject) this.cache.get(key);
            RefreshableCachedObject rco = (RefreshableCachedObject) co;
            rco.refresh();
        }
    }

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        if (obj.isStale())
        {
            if (obj instanceof RefreshableCachedObject)
            {
                RefreshableCachedObject rco = (RefreshableCachedObject) obj;
                if (rco.isUntouched())
                {
                    // Do not refresh an object that has exceeded TimeToLive
                    removeObject(id);
                    throw new ObjectExpiredException();
                }


                // Refresh Object
                rco.refresh();
                if (rco.isStale())
                {
                    // Object is Expired, remove it from cache.
                    removeObject(id);
                    throw new ObjectExpiredException();
                }
            }
            else
            {
                // Expired.
                removeObject(id);
                throw new ObjectExpiredException();
            }
        }


        if (obj instanceof RefreshableCachedObject)
        {
            // notify it that it's being accessed.
            RefreshableCachedObject rco = (RefreshableCachedObject) obj;
            rco.touch();
        }


        return obj;
    }

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                Object o = cachedElement.getObjectValue();
                
                if (o instanceof RefreshableCachedObject)
                {
                    RefreshableCachedObject rco = (RefreshableCachedObject) o;
                    if (rco.isUntouched())
                    {
                        this.cache.remove(key);
                    }
                    else if (rco.isStale())
                    {
                        rco.refresh();
                    }
                }
            }
        }
    }

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        if (obj.isStale())
        {
            if (obj instanceof RefreshableCachedObject)
            {
                RefreshableCachedObject rco = (RefreshableCachedObject) obj;
                if (rco.isUntouched())
                {
                    // Do not refresh an object that has exceeded TimeToLive
                    removeObject(id);
                    throw new ObjectExpiredException();
                }


                // Refresh Object
                rco.refresh();
                if (rco.isStale())
                {
                    // Object is Expired, remove it from cache.
                    removeObject(id);
                    throw new ObjectExpiredException();
                }
            }
            else
            {
                // Expired.
                removeObject(id);
                throw new ObjectExpiredException();
            }
        }


        if (obj instanceof RefreshableCachedObject)
        {
            // notify it that it's being accessed.
            RefreshableCachedObject rco = (RefreshableCachedObject) obj;
            rco.touch();
        }


        return obj;
    }

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                }
                else
                {
                    if (o instanceof RefreshableCachedObject)
                    {
                        RefreshableCachedObject rco = (RefreshableCachedObject) o;
                        if (rco.isUntouched())
                        {
                            this.cacheManager.remove(key, group);
                        }
                        else if (rco.isStale())
                        {
                            rco.refresh();
                        }
                    }
                }
            }
        }

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