With this approach, all interactions between the client and the intermediate middleware occur asynchronously using a collection of input and output message queues.
通过这种方法,客户机和中间件之间的全部交互都会使用一个输入和输出消息队列集合异步进行。
2
Figure 6 shows the second approach, which USES only a single input and output criterion, but sets the minimum multiplicity of all disconnected inputs and outputs to zero.