info.magnolia.module.cache.filter
Class DelegatingBlobCachedEntry

java.lang.Object
  info.magnolia.module.cache.filter.ContentCachedEntry
      info.magnolia.module.cache.filter.DelegatingBlobCachedEntry

All Implemented Interfaces:

CachedEntry, Serializable

public class DelegatingBlobCachedEntry
extends ContentCachedEntry

Used for large responses. Typically we don't want to cache big responses as they are so costly to keep in memory and tend to evict so much from the cache where they're put in that net performance drops. This cache entry does not keep the response in memory, instead it serves it from a file on disk or if there's no file it proceeds with rendering. When it has used the file once it deletes it. The entry still remains in cache and serves as a token to prevent caching in the future. The file is created by CacheResponseWrapper when it reaches its set threshold.

Version:

$Id$

See Also:

CacheResponseWrapper, Serialized Form

Field Summary

static String

CONTENT_FILE_ATTRIBUTE

Constructor Summary

DelegatingBlobCachedEntry(long contentLength, String contentType, String characterEncoding, int statusCode, org.apache.commons.collections.MultiMap headers, long modificationDate, String originalUrl, int timeToLiveInSeconds)

Method Summary

void	bindContentFileToCurrentRequest(javax.servlet.http.HttpServletRequest request, File contentFile)
protected boolean	canServeGzipContent()
void	replay(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response, javax.servlet.FilterChain chain)
protected void	writeContent(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response, javax.servlet.FilterChain chain, boolean acceptsGzipEncoding)

Methods inherited from class info.magnolia.module.cache.filter.ContentCachedEntry

addHeaders, getCharacterEncoding, getContentType, getHeaders, getLastModificationTime, getOriginalURL, getStatusCode, getTimeToLiveInSeconds, isAcceptsGzip, toString

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

CONTENT_FILE_ATTRIBUTE

public static final String CONTENT_FILE_ATTRIBUTE

Constructor Detail

DelegatingBlobCachedEntry

public DelegatingBlobCachedEntry(long contentLength,
                                 String contentType,
                                 String characterEncoding,
                                 int statusCode,
                                 org.apache.commons.collections.MultiMap headers,
                                 long modificationDate,
                                 String originalUrl,
                                 int timeToLiveInSeconds)
                          throws IOException

Throws:

IOException

Method Detail

canServeGzipContent

protected boolean canServeGzipContent()

Specified by:

canServeGzipContent in class ContentCachedEntry

replay

public void replay(javax.servlet.http.HttpServletRequest request,
                   javax.servlet.http.HttpServletResponse response,
                   javax.servlet.FilterChain chain)
            throws IOException,
                   javax.servlet.ServletException

Specified by:

replay in interface CachedEntry

Overrides:

replay in class ContentCachedEntry

chain - a cache entry might want to delegate to the filter chain, see replay(HttpServletRequest, HttpServletResponse, FilterChain)

Throws:

IOException

javax.servlet.ServletException

writeContent

protected void writeContent(javax.servlet.http.HttpServletRequest request,
                            javax.servlet.http.HttpServletResponse response,
                            javax.servlet.FilterChain chain,
                            boolean acceptsGzipEncoding)
                     throws IOException,
                            javax.servlet.ServletException

Specified by:

writeContent in class ContentCachedEntry

Throws:

IOException

javax.servlet.ServletException

bindContentFileToCurrentRequest

public void bindContentFileToCurrentRequest(javax.servlet.http.HttpServletRequest request,
                                            File contentFile)