java.lang.Object
org.enhydra.servlet.filter.Filter
org.enhydra.servlet.filter.MultiServerFilter
- Direct Known Subclasses:
- StandardLoggingFilter
- public abstract class MultiServerFilter
- extends Filter
This is the base class for filters specified by the administrator in the
MultiServer config file.
Any filter specified in the MultiServer config file must have two
propeties: it must implement the TransactionFilter interface, and
it must have a constructor that takes a string and a KeywordValueTable.
This abstract class provides these for you, which is why it is recommended
that you extend this class if you need to write your own filter for
the MultiServer. However, it is possible that a filter absolutly must
extend some other class (for example, the RMI connection method can
not extend StandardConnectionMethod because it must extend an object from
the RMI library). Unless there is a specific reason, filters intended
to be listed in the MultiServer config file should extend this class.
This is an abstract class; if you extend it you must implement the
wrap() function. When the MultiServer reads it's conifig
file, the server administrator may list filters to be applied to a
channel. The classname of the filters is specified. It is the
responsibility of the MultiServer to create these filter objects
and to install them into the correct channels. In order to be able
to instantiate the filters, they must all have a well-known
constructor. That is what this class ensures.
The constructor, which will most likely be overridden, takes a
description string and a KeywordValueTable (KVT). The KVT is used
to allow a flexible way for initial arguments to be passed in to
the filter. In the MultiServer config file, an entire hierarchy
of key=value pairs can be specified as the initial arguments to
the filter. This sub-tree is extracted to it's own KVT, and passed
in to the filter. Therefore, even though all the filters must use
the same constructor, the set of initial arguments is completely
up to the developer of the filter.
| Fields inherited from class org.enhydra.servlet.filter.Filter |
|
| Methods inherited from class org.enhydra.servlet.filter.Filter |
getDescription, getDestroyInterceptor, getInitInterceptor, getServiceInterceptor, registerInterceptors, setDescription, setDestroyInterceptor, setInitInterceptor, setServiceInterceptor, toString, unregisterInterceptors, wrapRequest, wrapResponse |
MultiServerFilter
public MultiServerFilter(java.lang.String description,
com.lutris.util.KeywordValueTable initArgs)
- Create a new filter. You will probably want to override this
to process your initial arguments. The description is saved
and will be returned by
toString().
The initial arguments are ignored.
Note: if you define other constructors, which take other
arguments, they will not be called. The MultiServer will be
instantiating instances of this class, and it will only use
this constructor.
JAVADOC | 
SOURCE | 
DOWNLOAD | NESTED | FIELD | CONSTR | METHOD