[请教] 这里这个 Dummy 是什么意思？？

Question

本帖最后由 yjh777 于 2011-04-22 09:46 编辑

如题: 文章里dummy这个单词怎么理解？  谢谢！

5.1 Dummy Subscriptions
-----------------------
It is sometimes useful to issue a "dummy" subscription to the TIPC topology
server -- that is, a subscription that has a time limit but will never match
any published name.  Such a subscription will never generate any publish or
withdraw events, but will generate a timeout event when it expires.

For example, suppose an application wishes to report what nodes are present
in the network every minute.  This can be accomplished as follows:

        connect to TIPC topology server
        send subscription for {0,1,2^^31-1}, time limit = none
        send subscription for {1,0,0}, time limit = 60 seconds
        set set of available nodes to "empty"
        loop
                receive event
                if (event == publish)
                        add node to set of available nodes
                else if (event == withdraw)
                        remove node from set of available nodes
                else
                        send subscription for {1,0,0}, time limit = 60 seconds
                        print list of available nodes
        end loop
. . .

Answer 1

貌似应该理解成"虚拟"