Hyperic HQ Plugin API v. 4.4.0.2

org.hyperic.util.notReady
Class NotReadyFilter

java.lang.Object
  extended by org.hyperic.util.notReady.NotReadyFilter
All Implemented Interfaces:
javax.servlet.Filter

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

A simple filter that will return 503 ( Service unavailable ) until the setReady(true) is called. It can be used by HQ or any other app to reject requests until all initialization is completed. To use it, just insert it in the web.xml, and map all the URIs of interest through this filter. When all subsystems are initialized and started, call setReady(). Another option is to use the AuthenticationFilter ( for the HQ UI ) and the AgentCallbackBossEJBImpl ( for agent callbacks ). In any case - the critical step is figuring when all things are started correctly, and calling the method that will unlock the filter.


Constructor Summary
NotReadyFilter()
           
 
Method Summary
 void destroy()
           
 void doFilter(javax.servlet.ServletRequest servletRequest, javax.servlet.ServletResponse servletResponse, javax.servlet.FilterChain filterChain)
           
 void init(javax.servlet.FilterConfig filterConfig)
           
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

NotReadyFilter

public NotReadyFilter()
Method Detail

init

public void init(javax.servlet.FilterConfig filterConfig)
          throws javax.servlet.ServletException
Specified by:
init in interface javax.servlet.Filter
Throws:
javax.servlet.ServletException

doFilter

public void doFilter(javax.servlet.ServletRequest servletRequest,
                     javax.servlet.ServletResponse servletResponse,
                     javax.servlet.FilterChain filterChain)
              throws java.io.IOException,
                     javax.servlet.ServletException
Specified by:
doFilter in interface javax.servlet.Filter
Throws:
java.io.IOException
javax.servlet.ServletException

destroy

public void destroy()
Specified by:
destroy in interface javax.servlet.Filter

Hyperic HQ Plugin API v. 4.4.0.2

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