Review, Research, and Discussion

What’s the difference between a FIFO and a standard queue?

Standard queues provide at-least-once delivery, which means that each message is delivered at least once. FIFO queues provide exactly-once processing, which means that each message is delivered once and remains available until a consumer processes it and deletes it.

How can the server be assured a message was properly received?

when the client get a message from the server the client wil send a message to the server that it receved the message.

What classic design pattern is best represented by event driven programming?

observer pattern is a software design pattern in which an object, named the subject, maintains a list of its dependents, called observers, and notifies them automatically of any state changes, usually by calling one of their methods.

How do you test an event driven system?

Service tests for event-driven systems operate on events for inputs and events for outputs and are unaware of other services. End-to-end Tests.

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term	Discripe
FIFO Queue	is the type of AWS SQS queue that guarantees order and provides exactly once delivery of messages.
Pub/Sub	which stands for Publisher/Subscriber, allows services to communicate asynchronously, with latencies on the order of 100 milliseconds.

SNS

Amazon Simple Notification Service (Amazon SNS) is a fully managed messaging service for both application-to-application (A2A) and application-to-person (A2P) communication.

SQS

Amazon Simple Queue Service (SQS) is a fully managed message queuing service that enables you to decouple and scale microservices, distributed systems, and serverless applications.