+// private void initBitronixTransactionManager() {
+// // TODO manage it in a managed service, as startup could be long
+// ServiceReference<TransactionManager> existingTm = bc.getServiceReference(TransactionManager.class);
+// if (existingTm != null) {
+// if (log.isDebugEnabled())
+// log.debug("Using provided transaction manager " + existingTm);
+// return;
+// }
+//
+// if (!TransactionManagerServices.isTransactionManagerRunning()) {
+// bitronix.tm.Configuration tmConf = TransactionManagerServices.getConfiguration();
+// tmConf.setServerId(UUID.randomUUID().toString());
+//
+// Bundle bitronixBundle = FrameworkUtil.getBundle(bitronix.tm.Configuration.class);
+// File tmBaseDir = bitronixBundle.getDataFile(KernelConstants.DIR_TRANSACTIONS);
+// File tmDir1 = new File(tmBaseDir, "btm1");
+// tmDir1.mkdirs();
+// tmConf.setLogPart1Filename(new File(tmDir1, tmDir1.getName() + ".tlog").getAbsolutePath());
+// File tmDir2 = new File(tmBaseDir, "btm2");
+// tmDir2.mkdirs();
+// tmConf.setLogPart2Filename(new File(tmDir2, tmDir2.getName() + ".tlog").getAbsolutePath());
+// }
+// BitronixTransactionManager transactionManager = getTransactionManager();
+// stopHooks.add(() -> transactionManager.shutdown());
+// BitronixTransactionSynchronizationRegistry transactionSynchronizationRegistry = getTransactionSynchronizationRegistry();
+// // register
+// bc.registerService(TransactionManager.class, transactionManager, null);
+// bc.registerService(UserTransaction.class, transactionManager, null);
+// bc.registerService(TransactionSynchronizationRegistry.class, transactionSynchronizationRegistry, null);
+// if (log.isDebugEnabled())
+// log.debug("Initialised default Bitronix transaction manager");
+// }
+