/** Allocates a connection. */
private Object allocateConnection(
ManagedConnectionFactory mcf, Subject subject, ConnectionRequestInfo info)
throws ResourceException {
UserPoolItem userPoolItem = null;
try {
while (true) {
userPoolItem = null;
UserTransactionImpl transaction = _tm.getUserTransaction();
if (transaction != null) userPoolItem = allocateShared(transaction, mcf, subject, info);
if (userPoolItem == null) userPoolItem = allocatePoolConnection(mcf, subject, info, null);
Object userConn;
userConn = userPoolItem.allocateUserConnection();
if (userConn != null) {
userPoolItem = null;
return userConn;
}
userPoolItem.close();
}
} finally {
if (userPoolItem != null) userPoolItem.close();
}
}
