Close channel after getting a response

.gitignore

@@ -7,3 +7,4 @@ gradlew.bat
 out/
 .DS_Store
 src/generated # Generated source files
+local-repo/

CONTRIBUTING.md

@@ -29,4 +29,17 @@ accept your pull requests.
    [Google Cloud Platform Samples Style Guide](https://github.com/GoogleCloudPlatform/Template/wiki/style.html) for the
    recommended coding standards for this organization.
 1. Ensure that your code has an appropriate set of unit tests which all pass.
-1. Submit a pull request.
+1. Submit a pull request.
+
+## Compiling Locally
+
+1. Use Java 8 for compilation. Otherwise compilation will fail while looking for `javax.annotation.Generated`.
+
+1. Install bundled jars to the local repository:
+
+       mvn install:install-file@install-actions-bindings
+       mvn install:install-file@install-dialogflow-bindings
+
+1. Compile the project:
+
+       mvn compile

src/main/kotlin/com/google/actions/api/smarthome/SmartHomeApp.kt

@@ -24,6 +24,7 @@ import io.grpc.ManagedChannelBuilder
 import io.grpc.auth.MoreCallCredentials
 import java.io.FileInputStream
 import java.util.concurrent.CompletableFuture
+import java.util.concurrent.TimeUnit
 
 abstract class SmartHomeApp : App {
     var credentials: GoogleCredentials? = null
@@ -107,7 +108,6 @@ abstract class SmartHomeApp : App {
                 .build()
 
         return blockingStub.requestSyncDevices(request)
-
     }
 
     /**
@@ -129,8 +129,16 @@ abstract class SmartHomeApp : App {
                 // See https://grpc.io/docs/guides/auth.html#authenticate-with-google-3.
                 .withCallCredentials(MoreCallCredentials.from(this.credentials))
 
-        return blockingStub.reportStateAndNotification(request)
+        val response = blockingStub.reportStateAndNotification(request)
+
+        channel.shutdown()
+        try {
+            channel.awaitTermination(500, TimeUnit.MILLISECONDS)
+        } catch (e: InterruptedException) {
+            e.printStackTrace()
+        }
 
+        return response
     }
 
     override fun handleRequest(inputJson: String?, headers: Map<*, *>?): CompletableFuture<String> {
@@ -188,4 +196,4 @@ abstract class SmartHomeApp : App {
     private fun getAsJson(response: SmartHomeResponse): String {
         return response.build().toString()
     }
-}
+}