Package net.targetr.wtm3.cache

Class ResponseCache

java.lang.Object

net.targetr.wtm3.cache.ResponseCache

public class ResponseCache
extends Object

Quickly builds responses using a resource cache.

Author:

Dr Michael Gardiner

Constructor Summary

Constructors

Constructor	Description
ResponseCache(ResourceCache cache)	Constructs a ResponseCache with the given resource cache underneath.

Method Summary

Modifier and Type	Method	Description
HttpByteArrayResponse	get(String path, String contentType)	Get a resource quickly by using cache if possible.
HttpResponse	getStaticResponse(HttpRequest httpReq, String path)	Interrogates the generalized application ResourceCache for a specific network path.
HttpResponse	getStaticResponse(HttpRequest httpReq, String path, String contentType)	Interrogates the generalized application ResourceCache for a specific network path.
static String	getType(String path)	Guesses the MIME type from a given request path extension.
void	invalidate()	Invalidate the cache.

Methods inherited from class java.lang.Object

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

Constructor Details

ResponseCache

public ResponseCache(ResourceCache cache)

Constructs a ResponseCache with the given resource cache underneath.

Parameters:

cache - The ResourceCache to use for lookups.

Method Details

getType

public static String getType(String path)

Guesses the MIME type from a given request path extension.

Parameters:

path - the resource's network path

Returns:

the matching predefined string describing its content type

getStaticResponse

public HttpResponse getStaticResponse(HttpRequest httpReq,
 String path)
                               throws IOException

Interrogates the generalized application ResourceCache for a specific network path.

Parameters:

httpReq - the active network request

path - the designated internal resource path

Returns:

an HTTP response encoding the discovered resource

Throws:

IOException - on an underlying cache access block

getStaticResponse

public HttpResponse getStaticResponse(HttpRequest httpReq,
 String path,
 String contentType)
                               throws IOException

Interrogates the generalized application ResourceCache for a specific network path.

Parameters:

httpReq - the active network request

path - the designated internal resource path

contentType - the forced static content MIME mapping

Returns:

an HTTP response encoding the discovered resource

Throws:

IOException - on an underlying cache access block

get

public HttpByteArrayResponse get(String path,
 String contentType)
                          throws IOException

Get a resource quickly by using cache if possible.

Parameters:

path - the path to the resource in the cache.

contentType - the type to set in the response header.

Returns:

response containing data from the resource.

Throws:

IOException - An exception occurred while reading the resource from the cache.

invalidate

public void invalidate()

Invalidate the cache. All items in the cache will be removed.