/** starts work on a transaction branch */
public void start(Xid xid, int flags) throws XAException {
if (_xid != null) {
if (log.isLoggable(Level.FINER)) log.finer("connection pool start XA: rejoin " + this);
return;
}
if (flags == TMJOIN && _xid == null) {
// TMJOIN means the resource manager is managing more than one
// connection. The delegates tie the PoolItems managed by
// the same resource manager together.
_xid = xid;
UserTransactionImpl trans = _cm.getTransaction();
if (trans != null) {
ManagedPoolItem xaHead = trans.findJoin(this);
if (xaHead != null) {
_xaNext = xaHead._xaNext;
_xaHead = xaHead;
xaHead._xaNext = this;
}
}
}
// local transaction optimization
if (!_isXATransaction && flags != TMJOIN && _localTransaction != null) {
try {
if (log.isLoggable(Level.FINER))
log.finer("begin-local-XA: " + xid + " " + _localTransaction);
_localTransaction.begin();
} catch (ResourceException e) {
throw new XAExceptionWrapper(e);
}
_xid = xid;
return;
}
if (_xaResource != null) {
if (log.isLoggable(Level.FINER)) log.finer("start-XA: " + xid + " " + _xaResource);
_xaResource.start(xid, flags);
_isXATransaction = true;
} else {
if (log.isLoggable(Level.FINER))
log.finer("start-XA with non XA resource: " + xid + " " + _xaResource);
}
_xid = xid;
}
