Update Kotlin "hello-world" CDK example to bring it in sync with TypeScript version

kotlin/hello-world-lambda-cdk/README.md

@@ -71,7 +71,10 @@ curl --json '{}' -H "Authorization: Bearer ${RESTATE_API_TOKEN}" \
     https://${CLUSTER_ID}.dev.restate.cloud:8080/greeter.Greeter/Greet
 ```
 
-### Useful commands
+## Cleanup
 
-* `npm run build`   compile the Lambda handler and synthesize CDK deployment artifacts
-* `npm run deploy`  perform a CDK deployment
+To tear down the stack, run:
+
+```shell
+npm run destroy
+```

kotlin/hello-world-lambda-cdk/bin/lambda-jvm-cdk.ts

@@ -5,6 +5,7 @@ import { LambdaJvmCdkStack } from "../cdk/lambda-jvm-cdk-stack";
 
 const app = new cdk.App();
 new LambdaJvmCdkStack(app, "LambdaJvmCdkStack", {
+  selfHosted: Boolean(app.node.tryGetContext("selfHosted")),
   clusterId: app.node.getContext("clusterId"),
   authTokenSecretArn: app.node.getContext("authTokenSecretArn"),
 });

kotlin/hello-world-lambda-cdk/cdk/lambda-jvm-cdk-stack.ts

@@ -1,16 +1,22 @@
 import * as cdk from "aws-cdk-lib";
 import * as lambda from "aws-cdk-lib/aws-lambda";
+import * as logs from "aws-cdk-lib/aws-logs";
 import * as restate from "@restatedev/restate-cdk";
 import { Construct } from "constructs";
 
 export class LambdaJvmCdkStack extends cdk.Stack {
   constructor(
     scope: Construct,
     id: string,
-    props: {
-      clusterId: string;
-      authTokenSecretArn: string;
-    } & cdk.StackProps,
+    props: (
+      | { selfHosted: true }
+      | {
+          selfHosted: false;
+          clusterId: string;
+          authTokenSecretArn: string;
+        }
+    ) &
+      cdk.StackProps,
   ) {
     super(scope, id, props);
 
@@ -25,17 +31,17 @@ export class LambdaJvmCdkStack extends cdk.Stack {
       systemLogLevel: "DEBUG",
     });
 
-    const environment = new restate.RestateCloudEnvironment(this, "RestateCloud", {
-      clusterId: props.clusterId,
-      authTokenSecretArn: props.authTokenSecretArn,
-    });
-
-    // Alternatively, you can deploy Restate on your own infrastructure like this. See the Restate CDK docs for more.
-    // const environment = new restate.SingleNodeRestateInstance(this, "Restate", {
-    //   logGroup: new logs.LogGroup(this, "RestateLogs", {
-    //     retention: logs.RetentionDays.THREE_MONTHS,
-    //   }),
-    // });
+    const environment = props.selfHosted
+      ? new restate.SingleNodeRestateDeployment(this, "Restate", {
+          logGroup: new logs.LogGroup(this, "RestateLogs", {
+            retention: logs.RetentionDays.THREE_MONTHS,
+            removalPolicy: cdk.RemovalPolicy.DESTROY,
+          }),
+        })
+      : new restate.RestateCloudEnvironment(this, "RestateCloud", {
+          clusterId: props.clusterId,
+          authTokenSecretArn: props.authTokenSecretArn,
+        });
 
     new restate.LambdaServiceRegistry(this, "RestateServices", {
       handlers: {

kotlin/hello-world-lambda-cdk/package.json

@@ -12,7 +12,8 @@
     "watch": "tsc -w",
     "format": "prettier --ignore-path .eslintignore --write \"**/*.+(js|ts|json)\"",
     "verify": "npm run format -- --check && npm run lint && npm run build",
-    "deploy": "npm run build && cdk deploy"
+    "deploy": "npm run build && cdk deploy",
+    "destroy": "npx cdk destroy"
   },
   "devDependencies": {
     "@restatedev/restate-cdk": "^0.7.0",

typescript/hello-world-lambda-cdk/README.md

@@ -70,7 +70,10 @@ curl -H "Authorization: Bearer ${RESTATE_API_TOKEN}" \
     https://${CLUSTER_ID}.dev.restate.cloud:8080/Greeter/greet
 ```
 
-### Useful commands
+## Cleanup
 
-* `npm run build`   compile the Lambda handler and synthesize CDK deployment artifacts
-* `npm run deploy`  perform a CDK deployment
+To tear down the stack, run:
+
+```shell
+npm run destroy
+```

typescript/hello-world-lambda-cdk/package.json

@@ -9,7 +9,8 @@
     "build": "npx cdk synth",
     "format": "prettier --ignore-path .eslintignore --write \"**/*.+(js|ts|json)\"",
     "verify": "npm run format -- --check && npm run lint && npm run build",
-    "deploy": "npm run build && lib deploy"
+    "deploy": "npm run build && lib deploy",
+    "destroy": "npx cdk destroy"
   },
   "devDependencies": {
     "@restatedev/restate-cdk": "^0.7.0",