iiop-openjdk/src/main/java/org/wildfly/iiop/openjdk/tm/TxServerInterceptor.java
public static Transaction getCurrentTransaction() {
        Transaction tx = null;
        if (piCurrent != null) {
            // A non-null piCurrent means that a TxServerInterceptor was
            // installed: check if there is a transaction propagation context
            try {
                Any any = piCurrent.get_slot(slotId);
                if (any.type().kind().value() != TCKind._tk_null) {
                    // Yes, there is a TPC: add the foreign transaction marker
                    tx = ForeignTransaction.INSTANCE;
                }
            } catch (InvalidSlot e) {
                throw IIOPLogger.ROOT_LOGGER.errorGettingSlotInTxInterceptor(e);
            }

        }
        return tx;
    }
public static Transaction getCurrentTransaction() {
        Transaction tx = null;
        if (piCurrent != null) {
            // A non-null piCurrent means that a TxServerInterceptor was
            // installed: check if there is a transaction propagation context
            try {
                Any any = piCurrent.get_slot(slotId);
                if (any.type().kind().value() != TCKind._tk_null) {
                    // Yes, there is a TPC: add the foreign transaction marker
                    tx = ForeignTransaction.INSTANCE;
                }
            } catch (InvalidSlot e) {
                throw IIOPLogger.ROOT_LOGGER.errorGettingSlotInTxInterceptor(e);
            }

        }
        return tx;
    }
Returns the transaction associated with the transaction propagation
context that arrived in the current IIOP request.