July 2017
Beginner to intermediate
358 pages
10h 54m
English
Content preview from Building Microservices with Go
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Push messaging
Rather than using a queue, sometimes, you may want a service to act immediately on an event. Your service subscribes to receive messages from a broker such as NATS.io or SNS. When the broker receives a message, dispatched from another service, then the broker notifies all the registered services by making a call to the registered endpoint, sending it a copy of the message. The receiver will generally disconnect once the message has been received and assumes that the message processes correctly. This pattern allows the message broker extreme throughput. In the case of NATS.io, a single server instance can deliver millions of messages per second. Should the client be unable to process the message, then it must handle the logic ...
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.