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

String

getDigestForResource(String resourcePath) Calculates the DIGEST checksum for a classpath resource.

Method Detail

getDigestForResource

String getDigestForResource(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:

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