Tzu-Li (Gordon) Tai created FLINK-21865:
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Summary: Add a Docker Compose greeter example to StateFun
playgrounds
Key: FLINK-21865
URL: https://issues.apache.org/jira/browse/FLINK-21865
Project: Flink
Issue Type: Task
Components: Stateful Functions
Reporter: Tzu-Li (Gordon) Tai
Assignee: Tzu-Li (Gordon) Tai
Fix For: statefun-3.0.0
This example is intended as a follow-up after completion of the Java SDK
Showcase Tutorial (FLINK-21862).
If users are already familiar with the Java SDK fundamentals and would like to
get a better understanding of how a realistic StateFun application looks like,
then this would be the example they start with. Otherwise, we would recommend
users to take a look at the Showcase tutorial first.
This example works with Docker Compose, and runs a few services that build up
an end-to-end StateFun application:
- Functions service that runs functions and expose them through an HTTP
endpoint.
- StateFun runtime processes (a manager plus workers) that will handle ingress,
egress, and inter-function messages as well as function state storage in a
consistent and fault-tolerant manner.
- Apache Kafka broker for the application ingress and egress.
To motivate this example, we'll implement a simple user greeter application,
which has two functions - a {{UserFn}} that expects {{UserLogin}} JSON events
from an ingress and keeps in state storage information about users, and a
{{GreetingsFn}} that accepts user information to generate personalized greeting
messages that are sent to users via an egress.
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