if (externalTransactionManager == null && serverConfig.isUseJtaTransactionManager()) {
externalTransactionManager = new JtaTransactionManager();
}
if (externalTransactionManager != null) {
externalTransactionManager.setTransactionManager(transactionManager);
this.transactionScopeManager = new ExternalTransactionScopeManager(transactionManager, externalTransactionManager);
logger.info("Using Transaction Manager [" + externalTransactionManager.getClass() + "]");
} else {
this.transactionScopeManager = new DefaultTransactionScopeManager(transactionManager);
}