Server Configuration Reference - The Resources Component

# Server Configuration Reference ## The Resources Component |
Introduction
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.
Attributes
> 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
> > --- | ---
> > `allowLinking` | If the value of this flag is `true`, symlinks will be allowed inside the web application, pointing to resources outside the web application base path. If not specified, the default value of the flag is `false`. NOTE: This flag MUST NOT be set to true on the Windows platform (or any other OS which does not have a case sensitive filesystem), as it will disable case sensitivity checks, allowing JSP source code disclosure, among other security problems.
> > `cached` | This boolean flag indicates if the resources should be cached. It defaults to `true`.
> > `cacheMaxSize` | Maximum size in kilobytes (KB) of the cache associated with the resources, if cached is set to true. It defaults to `10240` (10 megabytes).
> > `cacheTTL` | Amount of time in milliseconds between cache entries revalidation. If not specified, the default value is `5000` (5 seconds).
> > `caseSensitive` | This boolean flag toggles case sensitivity checks. Defaults to `true`. NOTE: This flag MUST NOT be set to false on the Windows platform (or any other OS which does not have a case sensitive filesystem), as it will disable case sensitivity checks, allowing JSP source code disclosure, among other security problems.
> > `docBase` | This is the functional equivalent to the Document Base of a Context.
Nested Components
No components may be nested inside a Resources element.
Special Features
No special features are associated with a Resources element.
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