chapters.mdc

Class UserServletFilter

java.lang.Object

chapters.mdc.UserServletFilter

All Implemented Interfaces:

javax.servlet.Filter

public class UserServletFilter
extends java.lang.Object
implements javax.servlet.Filter

A simple servlet filter that puts the username found either in the Principal.

The value is removed from the MDC once the request has been fully processed.

Field Summary

Fields

Modifier and Type	Field and Description
private java.lang.String	USER_KEY

Constructor Summary

Constructors

Constructor and Description
UserServletFilter()

Method Summary

Modifier and Type	Method and Description
void	destroy()
void	doFilter(javax.servlet.ServletRequest request, javax.servlet.ServletResponse response, javax.servlet.FilterChain chain)
void	init(javax.servlet.FilterConfig arg0)
private boolean	registerUsername(java.lang.String username) Register the user in the MDC under USER_KEY.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

USER_KEY

private final java.lang.String USER_KEY

See Also:

Constant Field Values

Constructor Detail

UserServletFilter

public UserServletFilter()

Method Detail

destroy

public void destroy()

Specified by:

destroy in interface javax.servlet.Filter

doFilter

public void doFilter(javax.servlet.ServletRequest request,
                     javax.servlet.ServletResponse response,
                     javax.servlet.FilterChain chain)
              throws java.io.IOException,
                     javax.servlet.ServletException

Specified by:

doFilter in interface javax.servlet.Filter

Throws:

java.io.IOException

javax.servlet.ServletException

init

public void init(javax.servlet.FilterConfig arg0)
          throws javax.servlet.ServletException

Specified by:

init in interface javax.servlet.Filter

Throws:

javax.servlet.ServletException

registerUsername

private boolean registerUsername(java.lang.String username)

Register the user in the MDC under USER_KEY.

Parameters:

username -

Returns:

true id the user can be successfully registered