dal.py 文件源码

def distributed_transaction_commit(*instances):
        if not instances:
            return
        instances = enumerate(instances)
        thread_key = '%s.%s' % (socket.gethostname(), threading.currentThread())
        keys = ['%s.%i' % (thread_key, i) for (i,db) in instances]
        for (i, db) in instances:
            if not db._adapter.support_distributed_transaction():
                raise SyntaxError(
                    'distributed transaction not suported by %s' % db._dbanme)
        try:
            for (i, db) in instances:
                db._adapter.prepare(keys[i])
        except:
            for (i, db) in instances:
                db._adapter.rollback_prepared(keys[i])
            raise RuntimeError('failure to commit distributed transaction')
        else:
            for (i, db) in instances:
                db._adapter.commit_prepared(keys[i])
        return