July 2017
Beginner to intermediate
358 pages
10h 54m
English
Content preview from Building Microservices with Go
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Event processing with at least once delivery
Event processing is a model which allows you to decouple your microservices by using a message queue. Rather than connect directly to a service which may or may not be at a known location, you broadcast and listen to events which exist on a queue, such as Redis, Amazon SQS, NATS.io, Rabbit, Kafka, and a whole host of other sources.
To use our example of sending a welcome e-mail, instead of making a direct call to the downstream service using its REST or RPC interface, we would add an event to a queue containing all the details that the recipient would need to process this message.
Our message may look like:
{ "id": "ABCDERE2342323SDSD", "queue" "registration.welcome_email", "dispatch_date": ...Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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