org.apache.tapestry.asset

Interface ResourceDigestSource

All Known Implementing Classes:

ResourceDigestSourceImpl

public interface ResourceDigestSource

Calculates the digest value, as a string, for a particular classpath resource. This is primarily used by the AssetServiceto authenticate requests (you are not allowed access to a resource unless you can provide the correct digest value).

Since:

4.0

Author:

Howard M. Lewis Ship

Method Summary

Methods

Modifier and Type	Method and Description
java.lang.String	getDigestForResource(java.lang.String resourcePath) Calculates the DIGEST checksum for a classpath resource.

Method Detail

getDigestForResource

java.lang.String getDigestForResource(java.lang.String resourcePath)

Calculates the DIGEST checksum for a classpath resource. Because this is expensive, the value may be cached.

Parameters:

resourcePath - the classpath resource, which should start with a leading slash.

Returns:

A string representation of the digest for the provided resource path.

Throws:

ApplicationRuntimeException - if the resource does not exist, or there is an error calculating the checksum.