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https://github.com/ismarslomic/ktor-graal-kafka-poc
https://github.com/ismarslomic/ktor-graal-kafka-poc
Last synced: about 2 months ago
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- Host: GitHub
- URL: https://github.com/ismarslomic/ktor-graal-kafka-poc
- Owner: ismarslomic
- Created: 2024-09-05T20:03:37.000Z (4 months ago)
- Default Branch: main
- Last Pushed: 2024-09-09T18:57:31.000Z (4 months ago)
- Last Synced: 2024-10-12T12:52:32.466Z (3 months ago)
- Language: Kotlin
- Size: 65.4 KB
- Stars: 0
- Watchers: 2
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
Awesome Lists containing this project
README
# Kafka Streams microservice using Ktor and GraalVM
> This repo is a PoC of consuming and producing messages to Kafka Broker with use of Apache Kafka Streams, built and
> run with use of Ktor and GraalVM.
## Limitations & Known issues
- Currently, Ktor Server applications that want to leverage GraalVM have to use CIO (Coroutine-based I/O engine) as
the [application engine](https://ktor.io/docs/server-engines.html).
- Micrometer Prometheus (v1.13.0) generates configuration log warning at startup,
see [KTOR-7035](https://youtrack.jetbrains.com/issue/KTOR-7035).
## Build
### Install GraalVM (for Mac)
You can follow [official installation](https://www.graalvm.org/latest/docs/getting-started/macos/) steps or by using
Homebrew and [jenv](https://www.jenv.be) bellow.
```bash
$ brew install --cask graalvm-jdk
$ jenv add 22.0.2-graal /Library/Java/JavaVirtualMachines/graalvm-22.jdk/Contents/Home
```
To check whether the installation was successful, run
```bash
$ java -version
java version "22.0.2" 2024-07-16
Java(TM) SE Runtime Environment Oracle GraalVM 22.0.2+9.1 (build 22.0.2+9-jvmci-b01)
Java HotSpot(TM) 64-Bit Server VM Oracle GraalVM 22.0.2+9.1 (build 22.0.2+9-jvmci-b01, mixed mode, sharing)
```
Note! jenv will report a deprecation warning, but you can ignore it.
### Run Kafka locally (optional)
If you prefer to use a local instance of Kafka broker, for test purpose, you can follow the
[Install Confluent Platform using ZIP and TAR Archives](https://docs.confluent.io/platform/current/installation/installing_cp/zip-tar.html#prod-kafka-cli-install).
You can find all Confluent CLI commands
in [Confluent CLI Command Reference](https://docs.confluent.io/confluent-cli/current/command-reference/overview.html).
Note! Confluent Platform v7.7.x supports up to JDK 17,
see [System Requirements - Java](https://docs.confluent.io/platform/current/installation/system-requirements.html#java).
To **start** Confluent Platform for testing purpose
```bash
$ confluent local services start
```
Confluent Control Center is available at http://localhost:9021
Overview of ports for all services in Confluent
Platform: [Ports](https://docs.confluent.io/platform/current/installation/system-requirements.html#ports)
To check **status** of all Confluent Platform services
```bash
$ confluent local services status
```
To **stop** Confluent Platform for testing purpose
```bash
$ confluent local services stop
```
To **destroy** local Confluent Platform
```bash
$ confluent local destroy
```
### Build and run native GraalVM image
```bash
$ ./gradlew nativeCompile
```
Run the executable file produced by the build step
```bash
$ ./build/native/nativeCompile/graalvm-server
```
### Build and run tests
To build an executable file for tests:
```bash
$ ./gradlew nativeTestCompile
```
Run the executable file produced by the build step
```bash
$ ./build/native/nativeTestCompile/graalvm-test-server
```
## Metrics
```bash
curl http://localhost:8080/metrics
```