Examples of io.undertow.server.handlers.cache.DirectBufferCache$CacheEntry

Package io.undertow.server.handlers.cache

Examples of io.undertow.server.handlers.cache.DirectBufferCache$CacheEntry

org.wso2.carbon.clustering.hazelcast.jsr107.CacheEntry
A non-blocking buffer cache where entries are indexed by a path and are made up of a subsequence of blocks in a fixed large direct buffer. An ideal application is a file system cache, where the path corresponds to a file location.
To reduce contention, entry allocation and eviction execute in a sampling fashion (entry hits modulo N). Eviction follows an LRU approach (oldest sampled entries are removed first) when the cache is out of capacity

In order to expedite reclamation, cache entries are reference counted as opposed to garbage collected.
@author Jason T. Greene

    public String getContentType(final MimeMappings mimeMappings) {
        return underlyingResource.getContentType(mimeMappings);
    }


    public void invalidate() {
        final DirectBufferCache dataCache = cachingResourceManager.getDataCache();
        if(dataCache != null) {
            dataCache.remove(cacheKey);
        }
    }

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        return true;
    }


    @Override
    public void serve(final Sender sender, final HttpServerExchange exchange, final IoCallback completionCallback) {
        final DirectBufferCache dataCache = cachingResourceManager.getDataCache();
        if(dataCache == null) {
            underlyingResource.serve(sender, exchange, completionCallback);
            return;
        }


        final DirectBufferCache.CacheEntry existing = dataCache.get(cacheKey);
        final Long length = getContentLength();
        //if it is not eligable to be served from the cache
        if (length == null || length > cachingResourceManager.getMaxFileSize()) {
            underlyingResource.serve(sender, exchange, completionCallback);
            return;
        }
        //it is not cached yet, install a wrapper to grab the data
        if (existing == null || !existing.enabled() || !existing.reference()) {
            Sender newSender = sender;


            final DirectBufferCache.CacheEntry entry;
            if (existing == null) {
                entry = dataCache.add(cacheKey, length.intValue(), cachingResourceManager.getMaxAge());
            } else {
                entry = existing;
            }


            if (entry != null && entry.buffers().length != 0 && entry.claimEnable()) {

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    @Override
    public Long getContentLength() {
        //we always use the underlying size unless the data is cached in the buffer cache
        //to prevent a mis-match between size on disk and cached size
        final DirectBufferCache dataCache = cachingResourceManager.getDataCache();
        if(dataCache == null) {
            return underlyingResource.getContentLength();
        }
        final DirectBufferCache.CacheEntry existing = dataCache.get(cacheKey);
        if(existing == null || !existing.enabled()) {
            return underlyingResource.getContentLength();
        }
        //we only return the
        return (long)existing.size();

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 */
public class LeastRecentlyUsedEvictionAlgorithm implements EvictionAlgorithm {


    @SuppressWarnings("unchecked")
    public void evict(CacheImpl cache) {
        CacheEntry lruCacheEntry = null;
        for (Object o : cache.getAll()) {
            CacheEntry cacheEntry = (CacheEntry) o;
            if (lruCacheEntry == null) {
                lruCacheEntry = cacheEntry;
            } else if (lruCacheEntry.getLastAccessed() > cacheEntry.getLastAccessed()) {
                lruCacheEntry = cacheEntry;
            }
        }
        if (lruCacheEntry != null) {
            cache.evict(lruCacheEntry.getKey());

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 */
public class MostRecentlyUsedEvictionAlgorithm implements EvictionAlgorithm {


    @SuppressWarnings("unchecked")
    public void evict(CacheImpl cache) {
        CacheEntry mruCacheEntry = null;
        for (Object o : cache.getAll()) {
            CacheEntry cacheEntry = (CacheEntry) o;
            if (mruCacheEntry == null) {
                mruCacheEntry = cacheEntry;
            } else if (mruCacheEntry.getLastAccessed() < cacheEntry.getLastAccessed()) {
                mruCacheEntry = cacheEntry;
            }
        }
        if (mruCacheEntry != null) {
            cache.evict(mruCacheEntry.getKey());

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public class RandomEvictionAlgorithm implements EvictionAlgorithm {
    private static Random random = new Random();


    @SuppressWarnings("unchecked")
    public void evict(CacheImpl cache) {
        CacheEntry lruCacheEntry = null;
        Collection all = cache.getAll();
        int evictionIndex = random.nextInt(all.size());
        int index = 0;


        for (Object anAll : all) {
            CacheEntry cacheEntry = (CacheEntry) anAll;
            if (index == evictionIndex) {
                lruCacheEntry = cacheEntry;
                break;
            }
            index++;

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