https://github.com/thomasvitale/devoxxuk-question-4
https://github.com/thomasvitale/devoxxuk-question-4
Last synced: 7 months ago
JSON representation
- Host: GitHub
- URL: https://github.com/thomasvitale/devoxxuk-question-4
- Owner: ThomasVitale
- License: apache-2.0
- Archived: true
- Created: 2022-05-08T11:16:47.000Z (over 3 years ago)
- Default Branch: main
- Last Pushed: 2022-05-10T17:30:30.000Z (over 3 years ago)
- Last Synced: 2025-02-07T08:49:16.319Z (8 months ago)
- Language: Java
- Size: 74.2 KB
- Stars: 1
- Watchers: 3
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- License: LICENSE
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README
# Devoxx UK - Question 4
This is question 4 of a game intended to demonstrate serverless and event-driven features on Kubernetes, using Knative and CloudEvents.
* For more information on the game, visit this [page](https://github.com/salaboy/from-monolith-to-k8s/tree/main/game).
* For instructions on deploying the entire system, visit this [page](https://github.com/ThomasVitale/eventing-game).
Question 4 is a Spring Boot project relying on Spring Cloud Function, Spring Native, and the CloudEvents Java SDK. The project
has been initialized using the Knative [func](https://github.com/knative-sandbox/kn-plugin-func) plugin.
## Usage
```shell
$ http player="jon-snow" sessionId="game-blahblah" message="Spring loves Knative"
HTTP/1.1 200 OK
Content-Length: 98
Content-Type: application/json
accept-encoding: gzip, deflate
connection: keep-alive
user-agent: HTTPie/3.1.0
{
"player": "jon-snow"
"level": "devoxxuk-question-4",
"levelScore": 33,
"sessionId": "game-blahblah",
"gameTime": "2022-04-19T11:40:46.04108"
}
```
## Local execution
Make sure you have a Java 17 distribution installed.
You can run the application locally as follows.
```shell
./gradlew bootRun
```
To run the tests run the following command.
```shell
./gradlew test
```
## The `func` CLI
It's recommended to set the `FUNC_REGISTRY` environment variable.
```shell script
export FUNC_REGISTRY=/
echo "export FUNC_REGISTRY=/" >> ~/.bashrc
```
where `` is a container registry URI (for example, `ghcr.io`) and `username` is your account name on
that registry.
### Building
This command builds an OCI image for the function. By default, this will build a GraalVM native image.
```shell
func build -v
```
**Note**: If you want to disable the native build, you need to edit the `func.yaml` file and
remove (or set to false) the following BuilderEnv variable:
```
buildEnvs:
- name: BP_NATIVE_IMAGE
value: "true"
```
### Running
This command runs the func locally in a container using the image created above.
```shell
func run
```
### Deploying
This command will build and deploy the function into cluster.
```shell
func deploy -v
```
## Function invocation
For the examples below, please be sure to set the `URL` variable to the route of your function.
You get the route by following command.
```shell script
func info
```
Note the value of **Routes:** from the output, set `$URL` to its value.
__TIP__:
If you use `kn` then you can set the url by:
```shell script
# kn service describe and show route url
export URL=$(kn service describe $(basename $PWD) -ourl)
```
Then, call the function as follows.
```shell script
http $URL player="jon-snow" sessionId="game-blahblah" message="Spring loves Knative"
```
## Cleanup
To clean the deployed function run:
```shell
func delete
```