paulcwarren / java-exe-app

Java Maven app to Use With watchexec

This is a Java Maven app WITHOUT Spring. Therefore, it can't use spring-boot-devtools.

This is also not a true web app. It is a long-running process that prints "Hello World!" to the console. Therefore, it can't use .tanzu/wait.sh

Prerequisites

1. Run the most recent deploy script.
2. Make sure your tilt is up to date.
3. Make sure you have the Java Extension Pack installed in VSCode.
4. Clone this directory and open it in VSCode.

Acceptance

1. tilt up.
2. Open the Tilt UI in the browser.
3. See that the resources go green.
4. At this point, the build will still be in progress. Track the build with kp build logs sample-app-java-exe. See that the watchexec buildpack is participating (in the DETECT phase), and that the default process type is reload (in the EXPORT phase). Wait for the build to complete.
5. Wait for the deployment pod (not the build pod) to be in the "Running" state. Only 1/2 containers will come up; this is okay.
6. In the Tilt UI, see the app print "Hello World!" every second.
7. In VSCode, make a change to src/main/java/com/example/App.java to make it print "Hello Tanzu!", and save.
8. In the Tilt UI, see that the container picked up the change to App.class and sync into the container. Within a second or two, the Tilt UI should show that the app is printing "Hello Tanzu!".