Package com.google.apphosting.utils.servlet

Class TransactionCleanupFilter

java.lang.Object

com.google.apphosting.utils.servlet.TransactionCleanupFilter

All Implemented Interfaces:

javax.servlet.Filter

public class TransactionCleanupFilter
extends Object
implements javax.servlet.Filter

A servlet Filter that looks for datastore transactions that are still active when request processing is finished. The filter attempts to roll back any transactions that are found, and swallows any exceptions that are thrown while trying to perform roll backs. This ensures that any problems we encounter while trying to perform roll backs do not have any impact on the result returned the user.

Constructor Summary

Constructors

Constructor	Description
TransactionCleanupFilter()

Method Summary

Modifier and Type	Method	Description
void	destroy()
void	doFilter(javax.servlet.ServletRequest request, javax.servlet.ServletResponse response, javax.servlet.FilterChain chain)
void	init(javax.servlet.FilterConfig filterConfig)

Methods inherited from class java.lang.Object

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

Constructor Detail

TransactionCleanupFilter

public TransactionCleanupFilter()

Method Detail

init

public void init(javax.servlet.FilterConfig filterConfig)

Specified by:

init in interface javax.servlet.Filter

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 IOException,
                     javax.servlet.ServletException

Specified by:

doFilter in interface javax.servlet.Filter

Throws:

IOException

javax.servlet.ServletException