The Resources Component

The Resources element represents the web application static resources, from which classes will be loaded, HTML, JSP and the other static files will be served. This allows the webapp to reside on various mediums other than the filesystem, like compressed in a WAR file, in a JDBC database, or in a more advanced versioning repository.

A unified caching engine is provided for all accesses to the webapp resources made by the servlet container and web applications which use the container provided mechanisms to access such resources, such as class laoder access, access through the ServletContext interface, or native access through the DirectoryContext interface.

Note: Running a webapp with non-filesystem based Resources implementations is only possible when the webapp does not rely on direct filesystem access to its own resources, and uses the methods in the ServletContext interface to access them.

A Resources element MAY be nested inside a Context component. If it is not included, a default filesystem based Resources will be created automatically, which is sufficient for most requirements.

Common Attributes

All implementations of Resources support the following attributes: Attribute Description className Java class name of the implementation to use. This class must implement the javax.naming.directory.DirContext interface. It is recommended for optimal functionality and performance, but not mandatory, that the class extend org.apache.naming.resources.BaseDirContext, as well as use the special object types provided in the org.apache.naming.resources for returned objects. If not specified, the standard value (defined below) will be used.

Standard Implementation

The standard implementation of Resources is org.apache.naming.resources.FileDirContext. It supports the following additional attributes (in addition to the common attributes listed above): Attribute Description cached This boolean flag indicates if the resources should be cached. It defaults to true. caseSensitive This boolean flag toggles case sensitivity for resourceson the Windows platform. Defaults to true. docBase This is the functional equivalent to the Document Base of a Context.

No components may be nested inside a Resources element.

No special features are associated with a Resources element.