JBossDeveloper

Umm... I'd rather post it here, you can copy it later to Wiki if you know how to do it ... as I don't :(

Note: each of the JTA implementations used has its own problems: JOTM doesn't automatically shutdown with Tomcat; Atomikos has its own log framework that is a pain to configure (they promised to migrate to log4j/CL though); and JBoss Tx doesn't seem to have a way to configure XA-aware datasources (I've asked for help on their forum, waiting for answers). Nevertheless, all of them allow to start up Seam without the Microcontainer (that's 3.5Mb of JARs and a bunch of nasty restrictions, mind you...). All that is needed is the Tomcat's standard META-INF/context.xml file (or use server.xml if you prefer), some declarations in META-INF/persistence.xml file, plus some glue code and some property files.

JOTM setup (http://jotm.objectweb.org/):

context.xml:

<?xml version="1.0" encoding="UTF-8"?>
<Context>
 <Resource name="DataSource" auth="Container" type="javax.sql.DataSource"
 maxActive="100" maxIdle="30" maxWait="10000" username="user"
 password="password" driverClassName="oracle.jdbc.driver.OracleDriver"
 url="url"
 factory="org.objectweb.jndi.DataSourceFactory" />
 <Transaction name="UserTransaction" auth="Container"
 type="javax.transaction.UserTransaction"
 factory="org.objectweb.jotm.UserTransactionFactory" jotm.timeout="60000" />
</Context>

<?xml version="1.0" encoding="UTF-8"?>
<persistence xmlns="http://java.sun.com/xml/ns/persistence"
 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd"
 version="1.0">
 <persistence-unit name="unitName" transaction-type="JTA">
 <jta-data-source>java:comp/env/DataSource</jta-data-source>
 <properties>
 <property name="hibernate.transaction.manager_lookup_class"
 value="org.hibernate.transaction.JOTMTransactionManagerLookup" />
 </properties>
 </persistence-unit>
</persistence>

java.naming.factory.initial=com.sun.jndi.rmi.registry.RegistryContextFactory
java.naming.provider.url=rmi://localhost:1099

carol.protocols=jrmp
carol.start.jndi=false
carol.start.ns=false
carol.start.rmi=false
carol.jndi.java.naming.factory.url.pkgs=org.apache.naming

<?xml version="1.0" encoding="UTF-8"?>
<Context>
 <Resource auth="Container" name="DataSource"
 type="com.atomikos.jdbc.nonxa.NonXADataSourceBean" connectionTimeout="20"
 factory="org.apache.naming.factory.BeanFactory" poolSize="1"
 user="user" password="password"
 driverClassName="oracle.jdbc.driver.OracleDriver"
 url="url" />
 <Transaction name="UserTransaction" auth="Container"
 type="javax.transaction.UserTransaction" factory="test.util.AtomikosUTLookup" />
</Context>

<?xml version="1.0" encoding="UTF-8"?>
<persistence xmlns="http://java.sun.com/xml/ns/persistence"
 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd"
 version="1.0">
 <persistence-unit name="unitName" transaction-type="JTA">
 <jta-data-source>java:comp/env/DataSource</jta-data-source>
 <properties>
 <property name="hibernate.transaction.manager_lookup_class"
 value="com.atomikos.icatch.jta.hibernate3.TransactionManagerLookup" />
 </properties>
 </persistence-unit>
</persistence>

com.atomikos.icatch.service=com.atomikos.icatch.standalone.UserTransactionServiceFactory

public class AtomikosUTLookup implements ObjectFactory {
 public AtomikosUTLookup() {
 }
 public Object getObjectInstance(Object obj, Name name, Context nameCtx,
 Hashtable environment) throws Exception {
 return new UserTransactionImp();
 }
}

<?xml version="1.0" encoding="UTF-8"?>
<Context>
 <Resource name="DataSource" auth="Container" type="javax.sql.DataSource"
 maxActive="100" maxIdle="30" maxWait="10000" username="user"
 password="password" driverClassName="oracle.jdbc.driver.OracleDriver"
 url="url" />
 <Transaction name="UserTransaction" auth="Container"
 type="javax.transaction.UserTransaction" factory="test.util.JBossJTAUTLookup" />
</Context>

<?xml version="1.0" encoding="UTF-8"?>
<persistence xmlns="http://java.sun.com/xml/ns/persistence"
 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd"
 version="1.0">
 <persistence-unit name="unitName" transaction-type="JTA">
 <jta-data-source>java:comp/env/DataSource</jta-data-source>
 <properties>
 <property name="hibernate.transaction.manager_lookup_class"
 value="test.util.JBossJTATMLookup" />
 </properties>
 </persistence-unit>
</persistence>

public class JBossJTATMLookup implements TransactionManagerLookup {
 public TransactionManager getTransactionManager(Properties props)
 throws HibernateException {
 return com.arjuna.ats.jta.TransactionManager.transactionManager();
 }
 public String getUserTransactionName() {
 return "java:comp/UserTransaction";
 }
}

public class JBossJTAUTLookup implements ObjectFactory {
 public Object getObjectInstance(Object obj, Name name, Context nameCtx,
 Hashtable<?, ?> environment) throws Exception {
 return UserTransaction.userTransaction();
 }
}

<core:init debug="true" />
 <core:manager conversation-timeout="120000" concurrent-request-timeout="500"
 conversation-id-parameter="cid" conversation-is-long-running-parameter="clr" />
 <core:entity-manager-factory name="unitName" />
 <core:managed-persistence-context name="entityManager" auto-create="true"
 entity-manager-factory="#{unitName}" />

I haven't got that far yet :( I guess the JTA will need to be hooked-up manually...

Alex