NarayanaTransaction.java

    @Override
    public synchronized TransactionManager manager() {
        String propName = "com.arjuna.ats.arjuna.common.propertiesFile";
        if (System.getProperty(propName) == null) {
            System.setProperty(propName, "jbossts-properties.xml");
        }
        if (this.manager == null) {
            this.manager = com.arjuna.ats.jta.TransactionManager.transactionManager();
        }
        return this.manager;
    }