mn create-app example.micronaut.micronautguide \
    --features=crac \
    --build=gradle \
    --lang=groovy \
    --test=spock

{"message":"Hello World"}

package example.micronaut

import io.micronaut.http.annotation.Controller
import io.micronaut.http.annotation.Get

@Controller (1)
class HelloController {

    @Get (2)
    Map<String, Object> index() {
        [message: "Hello World"] (3)
    }
}

package example.micronaut

import io.micronaut.context.ApplicationContext
import io.micronaut.crac.test.CheckpointSimulator
import io.micronaut.http.client.BlockingHttpClient
import io.micronaut.http.client.HttpClient
import io.micronaut.runtime.server.EmbeddedServer
import spock.lang.Specification

class HelloControllerSpec extends Specification {

    void "test hello endpoint works after checkpoint"() throws IOException {
        given:
        EmbeddedServer server = ApplicationContext.run(EmbeddedServer)
        BlockingHttpClient client = createHttpClient(server)

        when:
        String body = client.retrieve("/")

        then:
        body == '{"message":"Hello World"}'

        when:
        CheckpointSimulator checkpointSimulator = server.applicationContext.getBean(CheckpointSimulator)
        checkpointSimulator.runBeforeCheckpoint()

        then:
        !server.running

        when:
        client.close()
        checkpointSimulator.runAfterRestore()

        then:
        server.running

        when:
        client = createHttpClient(server)

        body = client.retrieve("/")

        then:
        body == '{"message":"Hello World"}'

        cleanup:
        client.close()
    }

    private static BlockingHttpClient createHttpClient(EmbeddedServer embeddedServer) {
        String url = "http://localhost:${embeddedServer.port}"
        return embeddedServer.applicationContext.createBean(HttpClient, url).toBlocking();
    }
}

./gradlew dockerBuildCrac

...

Successfully built ba78619b8d86
Successfully tagged micronautguide:latest
Created image with ID 'ba78619b8d86'.

BUILD SUCCESSFUL in 1m 41s
13 actionable tasks: 9 executed, 4 up-to-date

tasks.named("dockerBuildCrac") {
    images = ["gcr.io/micronaut-guides-xxxxxxx/micronautguide:latest"]
}

./gradlew dockerPushCrac

> Task :dockerPushCrac
Pushing image 'gcr.io/micronaut-guides-xxxxxxx/micronautguide:latest'.

gcloud run deploy \
    --image=gcr.io/micronaut-guides-xxxxxx/micronautguide:latest \
    --platform managed \
    --execution-environment=gen2 \
    --allow-unauthenticated

Service name (micronautguide):
Please specify a region:

...

 [22] us-central1
 [23] us-east1
 [24] us-east4

...

 [29] cancel
Please enter your numeric choice:  23

To make this the default region, run `gcloud config set run/region us-east1`.

Deploying container to Cloud Run service [micronautguide] in project [micronaut-guides-xxxxxx] region [us-east1]
✓ Deploying... Done.
  ✓ Creating Revision...
  ✓ Routing traffic...
  ✓ Setting IAM Policy...
Done.
Service [micronautguide] revision [micronautguide-00002-fat] has been deployed and is serving 100 percent of traffic.
Service URL: https://micronautguide-63kwrzytgq-ue.a.run.app

curl -i https://micronautguide-63kwrzytgq-ue.a.run.app

HTTP/2 200
content-type: application/json
x-cloud-trace-context: c3845249bc01f6c6a5bb7c01c4500bb8;o=1
date: Thu, 13 Apr 2023 11:09:58 GMT
server: Google Frontend
content-length: 25
alt-svc: h3=":443"; ma=2592000,h3-29=":443"; ma=2592000

{"message":"Hello World"}