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section-iv-starting-the-service.md

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Section III - starting the service

Produce to the Kafka Topic

{% hint style="info" %} NOTE: Make sure that Zookeeper and Kafka are running. {% endhint %}

In a new terminal, start up a Kafka producer for the specified topic - in this case names.

kafka_2.13-2.6.0/bin/kafka-console-producer.sh --topic names --bootstrap-server localhost:9092

We are now ready to start the microservice service that will listen for data that needs to be analyzed and added to the profile's algorithm.

There are 2 ways to start the service.

  1. Running using cargo run command while developing (used for local service testing)

NOTE: we provide the argument --bintdg_analyzer` because there are now multiple executables and must specify which one to run.

ArchConfWorkshopUser:~/environment/rust-tdg (master) $ cargo run --bin tdg_analyzer -- --topic names
    Finished dev [unoptimized + debuginfo] target(s) in 0.13s
     Running `target/debug/tdg_analyzer --topic names`
Listening to the names topic ...

To stop the service, use ctrl + c.

  1. Running using the executable.
ArchConfWorkshopUser:~/environment/rust-tdg (master) $ cargo build

Whenever you use the cargo build command, it places the created executable in the target/debug directory with the same name that was defined in the Cargo.toml manifest.

Since it is an executable, simple run the executable from the command terminal.

ArchConfWorkshopUser:~/environment/rust-tdg (master) $ ./target/debug/tdg_analyzer --topic names