The PubSubRealTime application creates a JMS publisher and subscriber — the publisher sends a set number of messages that are then received by the subscriber.

PubSubRealTime应用程序创建了一个JMS发布者和订阅者，其中发布者发送一组消息，然后由订阅者接收。

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Before creating the publisher and subscriber modules, you need to set up the JMS infrastructure.

在创建发布者和订阅者模块之前，您需要设置JMS基础结构。

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However, this topology can be the most expensive, because it forces the provider to manage a dedicated set of servers for the subscriber.

不过，此拓扑可能开销最大，因为这将迫使提供者为订阅者管理一系列专用服务器。

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Many of Sky's set-top boxes have a Digital Subscriber Line (DSL) port on the back that can link to a high-speed net service.

BBC: Turning on to interaction

The bottom line is that local broadcast channels are available in HD to any cable subscriber with a clear QAM tuner, whether you have a set-top-box or not.

ENGADGET: Clear QAM HD isn't going anywhere! HD