info.magnolia.imaging.caching
Class CachingImageStreamer<P>

java.lang.Object
  info.magnolia.imaging.caching.CachingImageStreamer<P>

Type Parameters:

P - type of ParameterProvider's parameter

All Implemented Interfaces:

ImageStreamer<P>

public class CachingImageStreamer<P>
extends Object
implements ImageStreamer<P>

An ImageStreamer which stores and serves generated images to/from a specific workspace.

Version:

$Id$

Constructor Summary

CachingImageStreamer(info.magnolia.cms.core.HierarchyManager hm, CachingStrategy<P> cachingStrategy, ImageStreamer<P> delegate)

Method Summary

protected info.magnolia.cms.core.NodeData	fetchFromCache(ImageGenerator<ParameterProvider<P>> generator, ParameterProvider<P> parameterProvider) Gets the binary property (NodeData) for the appropriate image, ready to be served, or null if the image should be regenerated.
protected info.magnolia.cms.core.NodeData	generateAndStore(ImageGenerator<ParameterProvider<P>> generator, ParameterProvider<P> parameterProvider)
protected void	serve(info.magnolia.cms.core.NodeData binary, OutputStream out)
void	serveImage(ImageGenerator<ParameterProvider<P>> generator, ParameterProvider<P> params, OutputStream out) Generates an image (if deemed necessary) with the given ImageGenerator and Parameters, streams it to the given OutputStream.

Methods inherited from class java.lang.Object

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

Constructor Detail

CachingImageStreamer

public CachingImageStreamer(info.magnolia.cms.core.HierarchyManager hm,
                            CachingStrategy<P> cachingStrategy,
                            ImageStreamer<P> delegate)

Method Detail

serveImage

public void serveImage(ImageGenerator<ParameterProvider<P>> generator,
                       ParameterProvider<P> params,
                       OutputStream out)
                throws IOException,
                       ImagingException

Description copied from interface: ImageStreamer

Generates an image (if deemed necessary) with the given ImageGenerator and Parameters, streams it to the given OutputStream.

Specified by:

serveImage in interface ImageStreamer<P>

Throws:

IOException

ImagingException

fetchFromCache

protected info.magnolia.cms.core.NodeData fetchFromCache(ImageGenerator<ParameterProvider<P>> generator,
                                                         ParameterProvider<P> parameterProvider)

Gets the binary property (NodeData) for the appropriate image, ready to be served, or null if the image should be regenerated.

serve

protected void serve(info.magnolia.cms.core.NodeData binary,
                     OutputStream out)
              throws IOException

Throws:

IOException

generateAndStore

protected info.magnolia.cms.core.NodeData generateAndStore(ImageGenerator<ParameterProvider<P>> generator,
                                                           ParameterProvider<P> parameterProvider)
                                                    throws IOException,
                                                           ImagingException

Throws:

IOException

ImagingException