[HHH-2778] TransactionManagerLookup implementation for Bitronix Transaction Manager

git-svn-id: https://svn.jboss.org/repos/hibernate/core/trunk@12932 1b8cb986-b30d-0410-93ca-fae66ebed9b2

core/src/main/java/org/hibernate/transaction/BTMTransactionManagerLookup.java

@@ -0,0 +1,34 @@
+package org.hibernate.transaction;
+
+import java.util.Properties;
+
+import javax.transaction.TransactionManager;
+
+import org.hibernate.HibernateException;
+
+/**
+ * TransactionManager lookup strategy for BTM
+ * @author Ludovic Orban
+ */
+public class BTMTransactionManagerLookup implements TransactionManagerLookup {
+
+	/**
+	 * @see org.hibernate.transaction.TransactionManagerLookup#getTransactionManager(Properties)
+	 */
+	public TransactionManager getTransactionManager(Properties props) throws HibernateException {
+		try {
+			Class clazz = Class.forName("bitronix.tm.TransactionManagerServices");
+			return (TransactionManager) clazz.getMethod("getTransactionManager", null).invoke(null, null);
+		}
+		catch (Exception e) {
+			throw new HibernateException( "Could not obtain BTM transaction manager instance", e );
+		}
+	}
+
+	/**
+	 * @see org.hibernate.transaction.TransactionManagerLookup#getUserTransactionName()
+	 */
+	public String getUserTransactionName() {
+		return "java:comp/UserTransaction";
+	}
+}