Atomikos Forum

Hello,

I'd like to know if it's possible to know: How to define a
'com.atomikos.icatch.jta.UserTransactionManager' (instead of UserTransactionImp/com.atomikos.icatch.jta.UserTransactionFactory) within TomCat (context)??!

Thnx a lot in advance,

I hope i do understand your question right - you want to define a UserTransactionManager per Webapp Context - right - and do this via Tomcat stuff and not via Spring for example.

If this was your question than the answer would be - use a LifeCycleListener and create the TxManager there.

http://tomcat.apache.org/tomcat-6.0-doc/config/context.html#Lifecycle_Listeners

You can instantiate your Manager there and export it via JNDI for example - look at the NamingContextListener as an example.

I did not write any glue code yet for this (me ist using spring) but this should work in theory ;-).

Tell if this is not what you asked or you need some code.

Hi Torsten,

  It´s a good/interesting tip of "use a LifeCycleListener and ..."
  But, I'm satisfied using a single TransactionManager shared by all transactions and all Webapp (since it works properly, off course). Anyway, thnx a lot!!

  The point is that need/want retrieve, in my App (spring), the (single) TransactionManager (not a UserTransaction), defined in Container, via JNDI, get it?!
  The approach is the following: to fetch the Container TransactionManager by way of JNDI lookUp (Important: it has to be of the class 'atomikos.icatch.jta.UserTransactionManager'; an object of the class 'atomikos.icatch.jta.UserTransactionImp' is not enough unfortunetaly); defining a 'springframework.transaction.jta.JtaTransactionManager' bean injecting the TransactionManager on property 'transactionManagerName', and state autodetectUserTransaction=true
this way:
<!-- JTA Transaction Manager este setting p/ ser usada em Produção: Container Java.-->
    <bean id="transactionManager" class="org.springframework.transaction.jta.JtaTransactionManager">
      <property name="transactionManagerName" value="java:comp/TransactionManager"></property>
      <property name="autodetectUserTransaction" value="true"></property>
    </bean>

So I'm gonna remake my ask/question in a more clealy way: I also would like to "mock" this behavior/setUp in a  Test enviroment. Using a Spring setting like the above, I used to ReBind a naming.Reference of 'UserTransactionImp' in a JUnit Test, this way:
    Reference atomikosUserTransactionFactoryDS = new Reference("com.atomikos.icatch.jta.UserTransactionImp"
                                                                , "com.atomikos.icatch.jta.UserTransactionFactory", null);
    atomikosUserTransactionFactoryDS
                  .add(new RefAddr("name") {
                            public Object getContent() {
                                return "UserTransaction";
                            }
                        }                  );
    atomikosUserTransactionFactoryDS
                  .add(new RefAddr("type") {
                            public Object getContent() {
                                return "com.atomikos.icatch.jta.UserTransactionImp";
                            }
                        }                  );
    rgstrIniCtx.rebind("java:comp/UserTransaction", atomikosUserTransactionFactoryDS); //utm  initContext

So, the point is: Isn't there means to make a naming.Reference of an object of the class 'UserTransactionManager' (i.e. a object TransactionManager implementation) and ReBind it in JNDI by "java:comp/TransactionManager"??"

Should be possible with a LifeCycleListener too like mentioned there:

http://www.atomikos.com/Documentation/Tomcat55Integration33

There the listener is already used to create the TxManager - modify this one and add the code to bind and unbind this created instance at JNDI naming context on start/stop event.

HTH

@Torsten,

Ok! Now I'm more safe about a instance of (User)TransactionManager be created within the Java Container (TomCat); and Spring Callback smart the enough to get TransactionManager in JNDI even if it bound w/ the "java:comp/UserTransaction" naminig!
thank u very much! ;-))

@Guy Pardon,

  In the case I use Tomcat 6 (or even 7)??! Do we still have to put/keep the 'Lifecycle .JAR' in TOMCAT_HOME/lib directory??!
And for version 6.x+: plz, just confirm to me if the correct .JAR is "atomikos-lifecycle-listener.jar" (instead of atomikos-tomcat-lifecycle.jar)??!

Hi,

I don't see why the listener would be obsolete in Tomcat 6/7 - do you?

As for the jar: it is on our wiki documentation and has been contributed by a community author. As far as I can say it should work but I did not decompile it to check.

HTH