Thank you Ian for your response. I appreciate it. Unfortunately, I am now a
bit lost, going around in circles and banging my head against a brick wall
:)
I am using Tomcat 6.0 + JOTM 2.1.4 (also, I am not using spring-modules-jcr)
and I am able to get my UserTransaction via JNDI (it is casted from an
org.objectweb.jotm.Current object, which implements javax.transaction
TransactionManager and UserTransaction interfaces). I have also tried
casting the Current object to TransactionManager and calling
transactionManager.getTransaction(), but no Transaction is returned.
I'm not sure what else to try. I thought Jackrabbit did support user and
container-managed transactions...? There seems to be no easy way for me to
retrieve a Transaction or TransactionManager object with the setup I am
using (although most likely I am just being stupid!). I have had a look at
the container-managed transactions part of the JCR 1.0 spec (associating the
resource with a global transaction using the myXAResource.start(xid,
TMNOFLAGS) and myXAResource.end(xid, TMSUSPEND); ), but that seems a bit
heavy-weight. By the way, what happened to the XIDHelper class?
Is there anyone out there that uses Tomcat, JOTM and transactions?
Ian Boston wrote:
>
> I will have a go at answering, but no guarantees :)
> On 1 Aug 2009, at 11:56, Gadbury wrote:
>
>>
>> Hi Ian,
>>
>> Thank you for the pointers. Was I wrong to use UserTransaction?
>
> I think (but I could be completely wrong), UserTransaction is
> generally a wrapper for the TransactionManager so when you create a
> user transaction jndi will associate the user transaction with the
> TransactionManager, and then the UserTransaction will proxy the
> remaining calls through to the TransactionManager (at least thats the
> case with Geronimo)
>
> You need to bind the JCR session into the transaction, which cant be
> done with a UserTransaction where the wiring is within the
> TransactionManager impl, usually bound to the JDBC data source. So
> your right to use UserTransaction for JDBC/Datasource, but wrong to
> use it for JCR. (IIRC)
>
>> What type
>> of tranasction is that in your example It looks to me like you're
>> using
>> Transaction and TransactionManager interfaces from javax.transaction.
>
> yes
>
>> How
>> do I get a TransactionManager instance? Can I still use JNDI or is
>> there an
>> alternative (in fact, JNDI presents me a problem with unit testing as
>> without the web application running on the Tomcat server, the JNDI
>> lookup
>> cannot get the UserTransaction instance) ?
>
> you *should* be able to look up the transaction manager from jNDI *or*
> for unit testing, create a new instance of the TransactionManager. I
> have been using Geronimo in OSGi with Sling/Jackrabbit and its just a
> new GeronimoTransactionManager(defaultTransactionTimeoutSeconds); to
> get one (only one per transaction context)
>
>>
>> Sorry for the silly questions. Thanks for your time. Regards,
>>
>> James
>>
>>
>> Ian Boston wrote:
>>>
>>> IIRC you have to bind the jcr session to the transaction. In
>>> Jackrabbit the session is actually an XASession with a
>>> getXAResource()
>>> method so you can bind the session with something like this.
>>>
>>> Transaction transaction = transactionManager.getTransaction();
>>> if (transaction != null) {
>>>
>>> transaction.enlistResource(((XASession)session).getXAResource());
>>> }
>>>
>>>
>>> HTH
>>> Ian
>>>
>>> On 31 Jul 2009, at 17:26, Gadbury wrote:
>>>
>>>>
>>>> Hi all,
>>>>
>>>> I have finally managed to get somewhere with jotm and Tomcat 6.0
>>>> having
>>>> followed the tutorial provided in the above links. I am finally
>>>> getting the
>>>> UserTransaction via JNDI lookup (after classloader issues and naming
>>>> exceptions) and I am testing that new
>>>> InitialContext().lookup("java:comp/UserTransaction"); is an instance
>>>> of
>>>> UserTranasction.
>>>>
>>>> Unfortunately, every session.save() called in between the
>>>> utx.begin() and
>>>> utx.commit() persists changes so the UserTranasction is not having
>>>> an
>>>> effect. I was hoping that session.save() would not persist changes
>>>> in the
>>>> scope of a UserTranasction but would ensure that node UUIDs are
>>>> permanently
>>>> assigned to new nodes. For example:
>>>>
>>>> Session session = getSession();
>>>>
>>>> // Get user transaction (for example, through JNDI)
>>>> UserTransaction utx = (UserTransaction) new
>>>> InitialContext().lookup("java:comp/UserTransaction");
>>>>
>>>> JcrUserDao userDao = new JcrUserDao();
>>>> JcrProductDao productDao = new JcrProductDao();
>>>>
>>>> utx.begin();
>>>>
>>>> Node newUserNode = userDao.create(aUser, session);
>>>>
>>>> session.save();
>>>>
>>>> String UUID = newUserNode.getUUID();
>>>>
>>>> Node newProductNode = productDao.create(aProduct, session);
>>>>
>>>> session.save();
>>>>
>>>> utx.commit();
>>>>
>>>> If I step through the above code in debug within Eclipse, and
>>>> terminate the
>>>> Tomcat server after the first session.save() but before the
>>>> utx.commit(), I
>>>> can see that the the changes are made by the first Dao method call
>>>> userDao.create(aUser, session) are persisted.
>>>>
>>>> So far I have put all the required jotm jars in %TOMCAT_HOME%/lib
>>>> from the
>>>> distribution bundle jotm 2.1.4.
>>>>
>>>> My context.xml is configured with:
>>>>
>>>> <Transaction factory="org.objectweb.jotm.UserTransactionFactory"/>
>>>>
>>>>
>>>> My carol.properties is saved in WEB-INF/Classes and is as follows:
>>>>
>>>> # JNDI (Protocol Invocation)
>>>> carol.protocols=jrmp
>>>>
>>>> # Local RMI Invocation
>>>> carol.jvm.rmi.local.call=true
>>>>
>>>> # do not use CAROL JNDI wrapper
>>>> carol.start.jndi=false
>>>>
>>>> # do not start a name server
>>>> carol.start.ns=false
>>>>
>>>> # Naming Factory
>>>> carol.jndi.java.naming.factory.url.pkgs=org.apache.naming
>>>>
>>>>
>>>> Is there some further configuration required? No exceptions are
>>>> being
>>>> thrown any more and the UserTransaction is retrieved via JNDI lookup
>>>> yet the
>>>> UserTranasction appears not to be functioning as expected.
>>>>
>>>> Any advice would be greatly appreciated. Thanks for your time.
>>>> Regards,
>>>>
>>>> James.
>>>>
>>>>
>>>>
>>>> Vijay Pandey wrote:
>>>>>
>>>>> There might be a line break and you might not be copying the full
>>>>> URL. I
>>>>> just checked and the URL is alive.
>>>>>
>>>>> -----Original Message-----
>>>>> From: Gadbury [mailto:[email protected]]
>>>>> Sent: Thursday, July 30, 2009 3:59 PM
>>>>> To: [email protected]
>>>>> Subject: RE: User Managed Transactions...
>>>>>
>>>>>
>>>>> Thank you Vijay, I shall take a closer look tomorrow. By the way,
>>>>> the
>>>>> second
>>>>> link gives me a 404.
>>>>>
>>>>> Cheers,
>>>>>
>>>>> James
>>>>>
>>>>>
>>>>> Vijay Pandey wrote:
>>>>>>
>>>>>> You might want to take a look at this
>>>>>>
>>>>>>
>>>>> http://static.raibledesigns.com/downloads/howto-tomcat-jotm.html#5.5-config
>>>>>>
>>>>>> along with this
>>>>>>
>>>>>>
>>>>> http://www.nabble.com/Re%3A-UserTransaction%2C-JOTM-and-Tomcat-5.5.x-p288894
>>>>>> 3.html
>>>>>>
>>>>>> Vijay
>>>>>>
>>>>>> -----Original Message-----
>>>>>> From: Gadbury [mailto:[email protected]]
>>>>>> Sent: Thursday, July 30, 2009 2:17 PM
>>>>>> To: [email protected]
>>>>>> Subject: Re: User Managed Transactions...
>>>>>>
>>>>>>
>>>>>> Hi again all.
>>>>>>
>>>>>> I have been trying to get javax.transaction.UserTransaction
>>>>>> working by
>>>>>> JNDI
>>>>>> lookup. I use Eclipse Galileo and Tomcat 6.0. I am trying trying
>>>>>> retreive
>>>>>> a UserTransaction as follows (I have tried both):
>>>>>>
>>>>>> UserTransaction utx = new
>>>>>> InitialContext().lookup("java:comp/UserTransaction");
>>>>>>
>>>>>> UserTransaction utx = new
>>>>>> InitialContext().lookup("java:comp/env/UserTransaction");
>>>>>>
>>>>>> However, an exception is thrown stating that I must setup a system
>>>>>> or
>>>>>> environment property, or the application context. Do I need to
>>>>>> configure
>>>>>> the resource and / or environment elements in context.xml? For
>>>>>> example,
>>>>>> the
>>>>>> resource configuration:
>>>>>>
>>>>>> <context>
>>>>>> <Resource name="UserTransaction" auth="Container"
>>>>>> type="javax.transaction.UserTransaction"/>
>>>>>> <ResourceParams name="UserTransaction">
>>>>>> <parameter>
>>>>>> <name>factory</name>
>>>>>> <value>org.objectweb.jotm.UserTransactionFactory</value>
>>>>>> </parameter>
>>>>>> <parameter>
>>>>>> <name>jotm.timeout</name>
>>>>>> <value>60</value>
>>>>>> </parameter>
>>>>>> </ResourceParams>
>>>>>> </context>
>>>>>>
>>>>>> Does Tomcat 6.0 support UserTransaction by JNDI, or do I need to
>>>>>> use
>>>>>> another
>>>>>> technology such as JOTM or Jencks? Ideally I wouldn't have to
>>>>>> install
>>>>>> and
>>>>>> configure one of the other technologies.
>>>>>>
>>>>>> Thanks for reading. Kind regards,
>>>>>>
>>>>>> James
>>>>>> --
>>>>>> View this message in context:
>>>>>>
>>>>> http://www.nabble.com/User-Managed-Transactions...-tp24687924p24745618.html
>>>>>> Sent from the Jackrabbit - Users mailing list archive at
>>>>>> Nabble.com.
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>
>>>>> --
>>>>> View this message in context:
>>>>> http://www.nabble.com/User-Managed-Transactions...-tp24687924p24747221.html
>>>>> Sent from the Jackrabbit - Users mailing list archive at
>>>>> Nabble.com.
>>>>>
>>>>>
>>>>>
>>>>>
>>>>
>>>> --
>>>> View this message in context:
>>>> http://www.nabble.com/User-Managed-Transactions...-tp24687924p24759260.html
>>>> Sent from the Jackrabbit - Users mailing list archive at Nabble.com.
>>>>
>>>
>>>
>>>
>>
>> --
>> View this message in context:
>> http://www.nabble.com/User-Managed-Transactions...-tp24687924p24768096.html
>> Sent from the Jackrabbit - Users mailing list archive at Nabble.com.
>>
>
>
>
--
View this message in context:
http://www.nabble.com/User-Managed-Transactions...-tp24687924p24788686.html
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