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

Package io.undertow.server.handlers.cache

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

io.undertow.server.handlers.cache.DirectBufferCache
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

            underlyingResource.serve(sender, exchange, completionCallback);
            return;
        }




        final DirectBufferCache dataCache = cachingResourceManager.getDataCache();
        if (dataCache == null) {
            underlyingResource.serve(sender, exchange, completionCallback);
            return;
        }
        final DirectBufferCache.CacheEntry existing = dataCache.get(cacheKey);
        //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());
            } else {
                entry = existing;
            }


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

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            underlyingResource.serve(sender, exchange, completionCallback);
            return;
        }




        final DirectBufferCache dataCache = cachingResourceManager.getDataCache();
        if (dataCache == null) {
            underlyingResource.serve(sender, exchange, completionCallback);
            return;
        }
        final DirectBufferCache.CacheEntry existing = dataCache.get(cacheKey);
        //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());
            } else {
                entry = existing;
            }


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

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    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 eligible 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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        this.maxRegions = maxRegions;
    }


    @Override
    public void start(final StartContext startContext) throws StartException {
        value = new DirectBufferCache(bufferSize, buffersPerRegion, maxRegions * buffersPerRegion * bufferSize);
    }

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                    exchange.getResponseHeaders().put(Headers.CONTENT_LENGTH, data.length() + "");
                    exchange.getResponseSender().send(data);
                }
            }
        };
        final CacheHandler cacheHandler = new CacheHandler(new DirectBufferCache(100, 10, 1000), messageHandler);
        DefaultServer.setRootHandler(cacheHandler);
    }

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        DeploymentInfo builder = new DeploymentInfo()
                .setClassIntrospecter(TestClassIntrospector.INSTANCE)
                .setClassLoader(ServletPathMappingTestCase.class.getClassLoader())
                .setContextPath("/servletContext")
                .setDeploymentName("servletContext.war")
                .setResourceManager(new CachingResourceManager(100, 10000, new DirectBufferCache(1000, 10, 1000 * 10 * 1000, BufferAllocator.DIRECT_BYTE_BUFFER_ALLOCATOR, METADATA_MAX_AGE), new FileResourceManager(tmpDir, 10485760), METADATA_MAX_AGE));


        builder.addServlet(new ServletInfo("DefaultTestServlet", PathTestServlet.class)
                .addMapping("/path/default"))
                .addFilter(Servlets.filter("message", MessageFilter.class).addInitParam(MessageFilter.MESSAGE, "FILTER_TEXT "))
                .addFilterUrlMapping("message", "*.txt", DispatcherType.REQUEST);

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        try {
            File rootPath = new File(getClass().getResource("page.html").toURI()).getParentFile();
            final ResourceHandler handler = new ResourceHandler()
                    .setResourceManager(new FileResourceManager(rootPath, 10485760));


            final CacheHandler cacheHandler = new CacheHandler(new DirectBufferCache(1024, 10, 10480), handler);
            final PathHandler path = new PathHandler();
            path.addPrefixPath("/path", cacheHandler);
            final CanonicalPathHandler root = new CanonicalPathHandler();
            root.setNext(path);
            DefaultServer.setRootHandler(root);

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        root = new FormEncodedDataHandler(root);
        root = new SimpleErrorPageHandler(root);
        //TODO: multipart


        if (cacheSize > 0) {
            root = new CacheHandler(new DirectBufferCache(1024, 1024 * 1024, cacheSize * 1024 * 1024), root);
        }


        return root;
    }

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