Examples of LazyExpiringCacheEntry

org.apache.roller.util.cache.LazyExpiringCacheEntry
A cache entry that is meant to expire in a lazy fashion. The way to use this class is to wrap the object you want to cache in an instance of this class and store that in your cache. Then when you want to retrieve this entry you must input a last-expired time which can be compared against the time this entry was cached to determine if the cached entry is "fresh". If the object is not fresh then we don't return it. This essentially allows us to track when an object is cached and then before we can retrieve that cached object we must compare it with it's last known invalidation time to make sure it hasn't expired. This is useful because instead of actively purging lots of cached objects from the cache at invalidation time, we can now be lazy and just invalidate them when we actually try to retrieve the cached object. This is useful for Roller because we will no longer have to iterate through the list of cached objects and inspect the keys to figure out what items to invalidate. Instead we can just sit back and let the items be invalidated as we try to use them.
org.apache.roller.weblogger.util.cache.LazyExpiringCacheEntry
A cache entry that is meant to expire in a lazy fashion. The way to use this class is to wrap the object you want to cache in an instance of this class and store that in your cache. Then when you want to retrieve this entry you must input a last-expired time which can be compared against the time this entry was cached to determine if the cached entry is "fresh". If the object is not fresh then we don't return it. This essentially allows us to track when an object is cached and then before we can retrieve that cached object we must compare it with it's last known invalidation time to make sure it hasn't expired. This is useful because instead of actively purging lots of cached objects from the cache at invalidation time, we can now be lazy and just invalidate them when we actually try to retrieve the cached object. This is useful for Roller because we will no longer have to iterate through the list of cached objects and inspect the keys to figure out what items to invalidate. Instead we can just sit back and let the items be invalidated as we try to use them.

Examples of org.apache.roller.util.cache.LazyExpiringCacheEntry

                    lastExpiration = lastExpirationDate.getTime();
            } else {
                lastExpiration = this.mainLastExpiredDate.getTime();
            }
            
            LazyExpiringCacheEntry entry =
                    (LazyExpiringCacheEntry) this.mCache.get(key);
            if(entry != null) {
                updateTime = (Date) entry.getValue(lastExpiration);
                
                if(updateTime == null)
                    mLogger.debug("HIT-INVALID "+key);
            }
            
            if (updateTime == null) {
                mLogger.debug("MISS "+key);
                
                if(feedRequest.getWeblogHandle() != null) {
                    Roller roller = RollerFactory.getRoller();
                    UserManager umgr = roller.getUserManager();
                    WeblogManager wmgr = roller.getWeblogManager();
                    
                    updateTime = wmgr.getWeblogLastPublishTime(
                            umgr.getWebsiteByHandle(feedRequest.getWeblogHandle()),
                            feedRequest.getWeblogCategory());
                    
                    this.mCache.put(key, new LazyExpiringCacheEntry(updateTime));
                    
                } else {
                    this.mCache.put(key, new LazyExpiringCacheEntry(new Date()));
                }
                
            } else {
                mLogger.debug("HIT "+key);
            }

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Examples of org.apache.roller.util.cache.LazyExpiringCacheEntry

            Date lastExpirationDate =
                    (Date) CacheManager.getLastExpiredDate(pageRequest.getWeblogHandle());
            if(lastExpirationDate != null)
                lastExpiration = lastExpirationDate.getTime();
            
            LazyExpiringCacheEntry entry =
                    (LazyExpiringCacheEntry) this.mCache.get(key);
            if(entry != null) {
                updateTime = (Date) entry.getValue(lastExpiration);
                
                if(updateTime == null)
                    mLogger.debug("HIT-INVALID "+key);
            }
            
            if (updateTime == null) {
                mLogger.debug("MISS "+key);
                
                if(pageRequest.getWeblogHandle() != null) {
                    // just set updateTime to now
                    updateTime = new Date();
                    this.mCache.put(key, new LazyExpiringCacheEntry(updateTime));
                }
                
            } else {
                mLogger.debug("HIT "+key);
            }

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Examples of org.apache.roller.util.cache.LazyExpiringCacheEntry

                Date lastExpirationDate = 
                        (Date) CacheManager.getLastExpiredDate(pageRequest.getWeblogHandle());
                if(lastExpirationDate != null)
                    lastExpiration = lastExpirationDate.getTime();
                
                LazyExpiringCacheEntry entry = 
                        (LazyExpiringCacheEntry) this.mCache.get(key);
                if(entry != null) {
                    respContent = (ResponseContent) entry.getValue(lastExpiration);
                    
                    if(respContent == null)
                        mLogger.debug("HIT-INVALID "+key);
                }
            }
            
            if (respContent == null) {
                
                mLogger.debug("MISS "+key);
                this.misses++;
                
                CacheHttpServletResponseWrapper cacheResponse =
                        new CacheHttpServletResponseWrapper(response);
                
                chain.doFilter(request, cacheResponse);
                
                cacheResponse.flushBuffer();
                
                // Store as the cache content the result of the response
                // if no exception was noted by content generator.
                if (request.getAttribute("DisplayException") == null) {
                    ResponseContent rc = cacheResponse.getContent();
                    
                    // only cache if this is not a logged in user?
                    if (!this.excludeOwnerPages || !pageRequest.isLoggedIn()) {
                        if (rc != null && rc.getSize() > 0) {
                            this.mCache.put(key, new LazyExpiringCacheEntry(rc));
                        } else {
                            mLogger.debug("Not caching zero length content for key: " + key);
                        }
                    } else {
                        mLogger.debug("SKIPPED "+key);

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Examples of org.apache.roller.util.cache.LazyExpiringCacheEntry

                    lastExpiration = lastExpirationDate.getTime();
            } else {
                lastExpiration = this.mainLastExpiredDate.getTime();
            }
            
            LazyExpiringCacheEntry entry =
                    (LazyExpiringCacheEntry) this.mCache.get(key);
            if(entry != null) {
                respContent = (ResponseContent) entry.getValue(lastExpiration);
                
                if(respContent == null)
                    mLogger.debug("HIT-INVALID "+key);
            }
                
            if (respContent == null) {
                
                mLogger.debug("MISS "+key);
                this.misses++;
                
                CacheHttpServletResponseWrapper cacheResponse =
                        new CacheHttpServletResponseWrapper(response);
                
                chain.doFilter(request, cacheResponse);
                
                cacheResponse.flushBuffer();
                
                // only cache if there wasn't an exception
                if (request.getAttribute("DisplayException") == null) {
                    ResponseContent rc = cacheResponse.getContent();
                    
                    this.mCache.put(key, new LazyExpiringCacheEntry(rc));
                } else {
                    // it is expected that whoever caught this display exception
                    // is the one who reported it to the logs
                    mLogger.debug("Display exception "+key);
                }

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Examples of org.apache.roller.util.cache.LazyExpiringCacheEntry

        if(!cacheEnabled)
            return null;
        
        Object entry = null;
        
        LazyExpiringCacheEntry lazyEntry =
                (LazyExpiringCacheEntry) this.contentCache.get(key);
        if(lazyEntry != null) {
            entry = lazyEntry.getValue(lastModified);
            
            if(entry != null) {
                log.debug("HIT "+key);
            } else {
                log.debug("HIT-EXPIRED "+key);

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Examples of org.apache.roller.util.cache.LazyExpiringCacheEntry

    public void put(String key, Object value) {
        
        if(!cacheEnabled)
            return;
        
        contentCache.put(key, new LazyExpiringCacheEntry(value));
        log.debug("PUT "+key);
    }

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Examples of org.apache.roller.util.cache.LazyExpiringCacheEntry

        if(!cacheEnabled)
            return null;
        
        Object entry = null;
        
        LazyExpiringCacheEntry lazyEntry =
                (LazyExpiringCacheEntry) this.contentCache.get(key);
        if(lazyEntry != null) {
            entry = lazyEntry.getValue(lastModified);
            
            if(entry != null) {
                log.debug("HIT "+key);
            } else {
                log.debug("HIT-EXPIRED "+key);

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Examples of org.apache.roller.util.cache.LazyExpiringCacheEntry

    public void put(String key, Object value) {
        
        if(!cacheEnabled)
            return;
        
        contentCache.put(key, new LazyExpiringCacheEntry(value));
        log.debug("PUT "+key);
    }

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Examples of org.apache.roller.util.cache.LazyExpiringCacheEntry

        if(!cacheEnabled)
            return null;
        
        Object entry = null;
        
        LazyExpiringCacheEntry lazyEntry =
                (LazyExpiringCacheEntry) this.contentCache.get(key);
        if(lazyEntry != null) {
            entry = lazyEntry.getValue(lastModified);
            
            if(entry != null) {
                log.debug("HIT "+key);
            } else {
                log.debug("HIT-EXPIRED "+key);

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Examples of org.apache.roller.util.cache.LazyExpiringCacheEntry

    public void put(String key, Object value) {
        
        if(!cacheEnabled)
            return;
        
        contentCache.put(key, new LazyExpiringCacheEntry(value));
        log.debug("PUT "+key);
    }

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