org.apache.cayenne.conf
Class WebApplicationContextFilter
java.lang.Object
   org.apache.cayenne.conf.WebApplicationContextFilter
org.apache.cayenne.conf.WebApplicationContextFilter
- All Implemented Interfaces: 
- javax.servlet.Filter
- public class WebApplicationContextFilter 
- extends Object- implements javax.servlet.Filter
A Servlet Filter that binds session DataContext to the current request thread. During
 the request application code without any knowledge of the servlet environment can
 access DataContext via DataContext.getThreadDataContext() method. 
 To
 enable the filter add XML similar to this in the web.xml descriptor of a
 web application:
 
 
  <filter>
   <filter-name>CayenneFilter</filter-name>
   <filter-class>org.apache.cayenne.conf.WebApplicationContextFilter</filter-class>
   </filter>
   <filter-mapping>
   <filter-name>CayenneFilter</filter-name>
   <url-pattern>/*</url-pattern>
   </filter-mapping>
 
- Since:
- 1.2
 
| Method Summary | 
|  void | destroy()Cleanup callback method that shuts down shared configuration, specifically
 EventManager dispatch threads.
 | 
|  void | doFilter(javax.servlet.ServletRequest request,
         javax.servlet.ServletResponse response,
         javax.servlet.FilterChain chain)The main worker method that binds a DataContext to the current thread on entry and
 unbinds it on exit (regardless of whether any exceptions occured in the request).
 | 
|  void | init(javax.servlet.FilterConfig filterConfig)
 | 
 
| Methods inherited from class java.lang.Object | 
| clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait | 
 
WebApplicationContextFilter
public WebApplicationContextFilter()
init
public void init(javax.servlet.FilterConfig filterConfig)
          throws javax.servlet.ServletException
- 
- Specified by:
- initin interface- javax.servlet.Filter
 
- 
- Throws:
- javax.servlet.ServletException
 
destroy
public void destroy()
- Cleanup callback method that shuts down shared configuration, specifically
 EventManager dispatch threads.
 
- 
- Specified by:
- destroyin interface- javax.servlet.Filter
 
- 
 
doFilter
public void doFilter(javax.servlet.ServletRequest request,
                     javax.servlet.ServletResponse response,
                     javax.servlet.FilterChain chain)
              throws IOException,
                     javax.servlet.ServletException
- The main worker method that binds a DataContext to the current thread on entry and
 unbinds it on exit (regardless of whether any exceptions occured in the request).
 
- 
- Specified by:
- doFilterin interface- javax.servlet.Filter
 
- 
- Throws:
- IOException
- javax.servlet.ServletException
 
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