观察器是用来处理体系结构内的事件通知的关键模式。

Observer was the key pattern for handling notification of events within the architecture.

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对于从交易系统客户端进入es b流的请求，Business Events是外部服务，或者更为准确地说，是在不影响流的情况下检测事件模式的观察器。

For the requests coming into ESB flow from the trading system client, Business events is an external service, or more precisely, an observer detecting patterns of events without influencing the flow.

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不过，观察者模式与单个事件源关联，而反应器模式则与多个事件源关联。

The Observer pattern is associated with a single source of events, however, whereas the Reactor pattern is associated with multiple sources of events.

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