public synchronized void start()

in src/main/java/org/apache/commons/dbcp2/managed/LocalXAConnectionFactory.java [285:313]

• 24 lines of code
• 7 McCabe index (conditional complexity)

        public synchronized void start(final Xid xid, final int flag) throws XAException {
            if (flag == TMNOFLAGS) {
                // first time in this transaction
                // make sure we aren't already in another tx
                if (this.currentXid != null) {
                    throw new XAException("Already enlisted in another transaction with xid " + xid);
                }
                // save off the current auto commit flag, so it can be restored after the transaction completes
                try {
                    originalAutoCommit = connection.getAutoCommit();
                } catch (final SQLException ignored) {
                    // no big deal, just assume it was off
                    originalAutoCommit = true;
                }
                // update the auto commit flag
                try {
                    connection.setAutoCommit(false);
                } catch (final SQLException e) {
                    throw newXAException("Count not turn off auto commit for a XA transaction", e);
                }
                this.currentXid = xid;
            } else if (flag == TMRESUME) {
                if (!xid.equals(this.currentXid)) {
                    throw new XAException("Attempting to resume in different transaction: expected " + this.currentXid + ", but was " + xid);
                }
            } else {
                throw new XAException("Unknown start flag " + flag);
            }
        }