transaction:no-transaction

[luxspes]

I am trying to build the simplest possible Seam project that I can, I just want a WAR, over Tomcat, with just Seam 2.0.2SP1, no Hibernate (I love it but do not need it for this project). So I commented out this lines:

 <!-- persistence:managed-persistence-context name="entityManager"
                                     auto-create="true"
                          entity-manager-factory="#{MinimalSeamWebEntityManagerFactory}"/>

   <persistence:entity-manager-factory name="MinimalSeamWebEntityManagerFactory" 
                      persistence-unit-name="MinimalSeamWeb"/-->

and disabled transaction management:

 <transaction:no-transaction/>

and now I am getting this infinite loop of stack traces (for this kind of cases it would be nice to have a stop application without stopping app server button) :

ERROR SeamPhaseListener:120 - uncaught exception
java.lang.IllegalStateException: Could not start transaction
     at org.jboss.seam.jsf.SeamPhaseListener.begin(SeamPhaseListener.java:592)
     at org.jboss.seam.jsf.SeamPhaseListener.handleTransactionsBeforePhase(SeamPhaseListener.java:323)
     at org.jboss.seam.jsf.SeamPhaseListener.beforeServletPhase(SeamPhaseListener.java:140)
     at org.jboss.seam.jsf.SeamPhaseListener.beforePhase(SeamPhaseListener.java:114)
     at com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:222)
     at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:117)
     at javax.faces.webapp.FacesServlet.service(FacesServlet.java:244)
     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
     at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:83)
     at org.jboss.seam.debug.hot.HotDeployFilter.doFilter(HotDeployFilter.java:68)
     at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
     at org.jboss.seam.web.MultipartFilter.doFilter(MultipartFilter.java:85)
     at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
     at org.jboss.seam.web.ExceptionFilter.doFilter(ExceptionFilter.java:64)
     at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
     at org.jboss.seam.web.RedirectFilter.doFilter(RedirectFilter.java:45)
     at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
     at org.ajax4jsf.webapp.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:141)
     at org.ajax4jsf.webapp.BaseFilter.doFilter(BaseFilter.java:281)
     at org.jboss.seam.web.Ajax4jsfFilter.doFilter(Ajax4jsfFilter.java:60)
     at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
     at org.jboss.seam.web.LoggingFilter.doFilter(LoggingFilter.java:58)
     at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
     at org.jboss.seam.servlet.SeamFilter.doFilter(SeamFilter.java:158)
     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
     at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
     at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
     at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:433)
     at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
     at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
     at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
     at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:286)
     at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:845)
     at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
     at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
     at java.lang.Thread.run(Thread.java:595)
Caused by: java.lang.UnsupportedOperationException: no transaction
     at org.jboss.seam.transaction.NoTransaction.begin(NoTransaction.java:36)
     at org.jboss.seam.jsf.SeamPhaseListener.begin(SeamPhaseListener.java:587)
     ... 37 more
11:11:07,671 ERROR SeamPhaseListener:127 - swallowing exception

What is wrong? why it doesn't work? Something seems to be calling this method (in org.jboss.seam.transaction.NoTransaction):

public void begin() throws NotSupportedException, SystemException
   {
      throw new UnsupportedOperationException("no transaction");
   }

Shouldn't it just do nothing, why does it throw this exception? and, if it needs to throw it.. then why does Seam crash? I thought org.jboss.seam.transaction.NoTransaction was for disabling Seam-managed transactions... is it not?

Regards,

[rogeriobaldini]

Did you solve this problem ?

Thanks
Rogerio.

[luxspes]

When (if) I ever solve it, rest assured that I will share my solution :-P.

[luxspes]

I am guessing the answer could be to create my own ReallyNoTransaction class inheriting from org.jboss.seam.transaction.NoTransaction, and overriding all methods to really do nothing.

Please tell me this isn't true!

[luxspes]

Again, I think this is a really ugly solution, but, it works:

Create ReallyNoTransaction.java:

package packageName;

//Lots of other imports here
import org.jboss.seam.transaction.NoTransaction;

@BypassInterceptors
public class ReallyNoTransaction extends NoTransaction {
     
     public void begin() throws NotSupportedException, SystemException
        {
         
        }

        public void commit() throws RollbackException, HeuristicMixedException,
                 HeuristicRollbackException, SecurityException, IllegalStateException, SystemException
        {
         
        }

        public int getStatus() throws SystemException
        {
           return Status.STATUS_NO_TRANSACTION;
        }

        public void rollback() throws IllegalStateException, SecurityException, SystemException
        {
           
        }

        public void setRollbackOnly() throws IllegalStateException, SystemException
        {
        
        }

        public void setTransactionTimeout(int timeout) throws SystemException
        {
        
        }
        
        @Override
        public void registerSynchronization(Synchronization sync)
        {
        
        }
                
}

And add to components.xml:

 <component
  class="packageName.ReallyNoTransaction"
  name="org.jboss.seam.transaction.transaction" scope="event" precedence="30"/>

And that seems to be it... everything seems to be working (But I wonder if it will show malignant secondary effects later)

I also wonder why the NoTransaction class that comes with Seam is not implemented as mine? I refuse to believe its only purpose is to crash the application.

Regards,

[jguglielmin]

I've used this before (on previous Seam versions) and you need 2 separate entries in components.xml

<core:init transaction-management-enabled="false"/>

        and

<transaction:no-transaction />

Just one or the other doesn't disable the tx management.

[pmuir]

RTFM - http://docs.jboss.com/seam/2.0.3.CR1/reference/en-US/html/persistence.html#d0e6475. NoTransaction doesn't disable Seam Managed Transactions, and doesn't claim to.

[luxspes]

I guess the JBossTools team should also RTFM ;-), because after I use the <core:init transaction-management-enabled="false"/> I get this message in the tree view of editor for components.xml:

ERROR: Editor model does not support attribute transaction-management-enabled of core:init|. 

I guess it is not that easy to find :-P

[pmuir]

Please report this in the JBIDE JIRA - thanks!