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RollbackFilter.java
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/
RollbackFilter.java
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package org.jboss.seam.transaction;
import java.io.IOException;
import javax.inject.Inject;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.annotation.WebFilter;
import javax.transaction.Status;
import javax.transaction.SystemException;
import javax.transaction.UserTransaction;
/**
* This filter rolls back the current transaction if it is still active.
*
* @author Nicklas Karlsson
*
*/
@WebFilter(value = "/*")
public class RollbackFilter implements Filter
{
@Inject
private UserTransaction userTransaction;
@Override
public void destroy()
{
}
@Override
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException
{
try
{
rollbackTransactionIfActive();
chain.doFilter(request, response);
}
finally
{
rollbackTransactionIfActive();
}
}
private void rollbackTransactionIfActive()
{
try
{
if (userTransaction.getStatus() == Status.STATUS_ACTIVE)
{
userTransaction.rollback();
}
}
catch (SystemException e)
{
// so not?
}
}
@Override
public void init(FilterConfig config) throws ServletException
{
}
}