Funqy Google Cloud Functions
The guide walks through quickstart code to show you how you can deploy Funqy functions to Google Cloud Functions.
Essa tecnologia é considerada preview. In preview, backward compatibility and presence in the ecosystem is not guaranteed. Specific improvements might require changing configuration or APIs, and plans to become stable are under way. Feedback is welcome on our mailing list or as issues in our GitHub issue tracker. Para obter uma lista completa de possíveis status, consulte nosso FAQ. |
Pré-requisitos
Para concluir este guia, você precisa:
-
Mais ou menos 30 minutes
-
Um IDE
-
JDK 17+ installed with
JAVA_HOME
configured appropriately -
Apache Maven 3.9.9
-
Opcionalmente, o Quarkus CLI se você quiser usá-lo
-
A Google Cloud Account. Free accounts work.
Login to Google Cloud
Login to Google Cloud is necessary for deploying the application. It can be done as follows:
gcloud auth login
The Quickstart
Clone o repositório Git: git clone https://github.com/quarkusio/quarkus-quickstarts.git
, ou baixe um arquivo.
The solution is located in the funqy-google-cloud-functions-quickstart
directory.
Criando o Maven Deployment Project
Create an application with the quarkus-funqy-google-cloud-functions
extension.
You can use the following Maven command to create it:
Para usuários do Windows:
-
Se estiver usando cmd, (não use barra invertida '\' e coloque tudo na mesma linha)
-
Se estiver usando o Powershell, envolva os parâmetros '-D' entre aspas duplas, por exemplo, '"-DprojectArtifactId=funqy-google-cloud-functions"'
O Código
There is nothing special about the code and more importantly nothing Google Cloud specific. Funqy functions can be deployed to many environments and Google Cloud Functions is one of them.
Choose Your Function
Only one Funqy function can be exported per Google Cloud Functions deployment. If you only have one method
annotated with @Funq
in your project, then there is no worries. If you have multiple functions defined
within your project, then you will need to choose the function within your Quarkus application.properties
:
quarkus.funqy.export=greet
Alternatively, you can set the QUARKUS_FUNQY_EXPORT
environment variable when you create the Google Cloud Function using the gcloud
cli.
Build e Deploy
Compile o projeto:
quarkus build
./mvnw install
./gradlew build
Isto irá compilar e empacotar o seu código.
Creating the functions
In this example, we will create two background functions and a cloud events function. Background functions allow you to react to Google Cloud events like PubSub messages, Cloud Storage events, Firestore events, … Cloud events functions allow you to react to supported events using the Cloud Events specification.
Quarkus supports Cloud Functions gen 1 and gen 2. For an overview of Cloud Functions gen 2 see this page on the Google Cloud Functions documentation. To use gen 2 you must add the --gen2 parameter.
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import jakarta.inject.Inject;
import io.cloudevents.CloudEvent;
import io.quarkus.funqy.Funq;
import io.quarkus.funqy.gcp.functions.event.PubsubMessage;
import io.quarkus.funqy.gcp.functions.event.StorageEvent;
public class GreetingFunctions {
@Inject GreetingService service; (1)
@Funq (2)
public void helloPubSubWorld(PubsubMessage pubSubEvent) {
String message = service.hello(pubSubEvent.data);
System.out.println(pubSubEvent.messageId + " - " + message);
}
@Funq (3)
public void helloGCSWorld(StorageEvent storageEvent) {
String message = service.hello("world");
System.out.println(storageEvent.name + " - " + message);
}
@Funq (4)
public void helloCloudEvent(CloudEvent cloudEvent) {
System.out.println("Receive event Id: " + cloudEvent.getId());
System.out.println("Receive event Subject: " + cloudEvent.getSubject());
System.out.println("Receive event Type: " + cloudEvent.getType());
System.out.println("Receive event Data: " + new String(cloudEvent.getData().toBytes()));
System.out.println("Be polite, say " + service.hello("world"));
}
}
Function return type can also be Mutiny reactive types. |
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Injection works inside your function.
-
This is a background function that takes as parameter a
io.quarkus.funqy.gcp.functions.event.PubsubMessage
, this is a convenient class to deserialize a PubSub message. -
This is a background function that takes as parameter a
io.quarkus.funqy.gcp.functions.event.StorageEvent
, this is a convenient class to deserialize a Google Storage event. -
This is a cloud events function, that takes as parameter a
io.cloudevents.CloudEvent
, inside it thegetData()
method will return the event content, a storage event in this case.
we provide convenience class to deserialize common Google Cloud events inside the io.quarkus.funqy.gcp.functions.event package.
They are not mandatory to use, you can use any object you want.
|
As our project contains multiple functions, we need to specify which function needs to be deployed via the following property inside our application.properties
:
quarkus.funqy.export=helloPubSubWorld
Build and Deploy to Google Cloud
To build your application, you can package your application via mvn clean package
.
You will have a single JAR inside the target/deployment
repository that contains your classes and all your dependencies in it.
Then you will be able to use gcloud
to deploy your function to Google Cloud.
The gcloud
command will be different depending on which event triggers your function.
We will use the Java 17 runtime but you can switch to the Java 21 runtime by using --runtime=java21 instead of --runtime=java17 on the deploy commands.
|
The first time you launch the
This means that Cloud Build is not activated yet. To overcome this error, open the URL shown in the error, follow the instructions and then wait a few minutes before retrying the command. |
Background Functions - PubSub
Use this command to deploy to Google Cloud Functions:
gcloud functions deploy quarkus-example-funky-pubsub \
--entry-point=io.quarkus.funqy.gcp.functions.FunqyBackgroundFunction \
--runtime=java17 --trigger-resource hello_topic --trigger-event google.pubsub.topic.publish \
--source=target/deployment
The entry point always needs to be |
The --trigger-resource
option defines the name of the PubSub topic, and the --trigger-event google.pubsub.topic.publish
option
define that this function will be triggered by all message publication inside the topic.
To trigger an event to this function, you can use the gcloud functions call
command:
gcloud functions call quarkus-example-funky-pubsub --data '{"data":"Pub/Sub"}'
The --data '{"data":"Hello, Pub/Sub"}'
option allows you to specify the message to be sent to PubSub.
Background Functions - Cloud Storage
Before deploying your function, you need to create a bucket.
gsutil mb gs://quarkus-hello
Then, use this command to deploy to Google Cloud Functions:
gcloud functions deploy quarkus-example-funky-storage \
--entry-point=io.quarkus.funqy.gcp.functions.FunqyBackgroundFunction \
--runtime=java17 --trigger-resource quarkus-hello --trigger-event google.storage.object.finalize \
--source=target/deployment
The entry point always needs to be |
The --trigger-resource
option defines the name of the Cloud Storage bucket, and the --trigger-event google.storage.object.finalize
option
define that this function will be triggered by all new file inside this bucket.
To trigger an event to this function, you can use the gcloud functions call
command:
gcloud functions call quarkus-example-funky-storage --data '{"name":"test.txt"}'
The --data '{"name":"test.txt"}'
option allow to specify a fake file name, a fake Cloud Storage event will be created for this name.
You can also simply add a file to Cloud Storage using the command line of the web console.
Cloud Events Functions - Cloud Storage
Cloud Events Function is a feature of Cloud Functions gen 2 only. |
Before deploying your function, you need to create a bucket.
gsutil mb gs://quarkus-hello
Then, use this command to deploy to Google Cloud Functions:
gcloud functions deploy quarkus-example-cloud-event --gen2 \
--entry-point=io.quarkus.funqy.gcp.functions.FunqyCloudEventsFunction \
--runtime=java17 --trigger-bucket=example-cloud-event --source=target/deployment
The entry point always needs to be |
The --trigger-bucket=
option defines the name of the Cloud Storage bucket.
To trigger the event, you can send a file to the GCS example-cloud-event
bucket.
Running locally
The easiest way to locally run your function is using the Cloud Function invoker JAR.
You can download it via Maven using the following command:
mvn dependency:copy \
-Dartifact='com.google.cloud.functions.invoker:java-function-invoker:1.3.0' \
-DoutputDirectory=.
Before using the invoker, you first need to build your function via:
quarkus build
./mvnw install
./gradlew build
Then you can use it to launch your function locally, again, the command depends on the type of function and the type of events.
Background Functions - PubSub
For background functions, you launch the invoker with a target class of io.quarkus.funqy.gcp.functions.FunqyBackgroundFunction
.
java -jar java-function-invoker-1.3.0.jar \
--classpath target/funqy-google-cloud-functions-1.0.0-SNAPSHOT-runner.jar \
--target io.quarkus.funqy.gcp.functions.FunqyBackgroundFunction
The --classpath parameter needs to be set to the previously packaged JAR that contains your function class and all Quarkus related classes.
|
Then you can call your background function via an HTTP call with a payload containing the event:
curl localhost:8080 -d '{"data":{"data":"world"}}'
This will call your PubSub background function with a PubSubMessage {"data":"hello"}
.
Background Functions - Cloud Storage
For background functions, you launch the invoker with a target class of io.quarkus.funqy.gcp.functions.FunqyBackgroundFunction
.
java -jar java-function-invoker-1.3.0.jar \
--classpath target/funqy-google-cloud-functions-1.0.0-SNAPSHOT-runner.jar \
--target io.quarkus.funqy.gcp.functions.FunqyBackgroundFunction
The --classpath parameter needs to be set to the previously packaged JAR that contains your function class and all Quarkus related classes.
|
Then you can call your background function via an HTTP call with a payload containing the event:
curl localhost:8080 -d '{"data":{"name":"text"}}'
This will call your PubSub background function with a Cloud Storage event {"name":"file.txt"}
, so an event on the file.txt
file.
Cloud Events Functions - Cloud Storage
Cloud Events Function is a feature of Cloud Functions gen 2 only. |
For cloud events functions, you launch the invoker with a target class of io.quarkus.funqy.gcp.functions.FunqyCloudEventsFunction`
.
java -jar java-function-invoker-1.3.0.jar \
--classpath target/funqy-google-cloud-functions-1.0.0-SNAPSHOT-runner.jar \
--target io.quarkus.funqy.gcp.functions.FunqyCloudEventsFunction
The --classpath parameter needs to be set to the previously packaged JAR that contains your function class and all Quarkus related classes.
|
Then you can call your background function via an HTTP call with a payload containing the event:
curl localhost:8080 \
-X POST \
-H "Content-Type: application/json" \
-H "ce-id: 123451234512345" \
-H "ce-specversion: 1.0" \
-H "ce-time: 2020-01-02T12:34:56.789Z" \
-H "ce-type: google.cloud.storage.object.v1.finalized" \
-H "ce-source: //storage.googleapis.com/projects/_/buckets/MY-BUCKET-NAME" \
-H "ce-subject: objects/MY_FILE.txt" \
-d '{
"bucket": "MY_BUCKET",
"contentType": "text/plain",
"kind": "storage#object",
"md5Hash": "...",
"metageneration": "1",
"name": "MY_FILE.txt",
"size": "352",
"storageClass": "MULTI_REGIONAL",
"timeCreated": "2020-04-23T07:38:57.230Z",
"timeStorageClassUpdated": "2020-04-23T07:38:57.230Z",
"updated": "2020-04-23T07:38:57.230Z"
}'
This will call your cloud events function with an event on the "MY_FILE.txt
file.
Testing your function
Quarkus provides built-in support for testing your Funqy Google Cloud functions via the quarkus-test-google-cloud-functions
dependency.
To use it, you must add the following test dependency in your pom.xml
.
<dependency>
<groupId>io.quarkus</groupId>
<artifactId>quarkus-test-google-cloud-functions</artifactId>
<scope>test</scope>
</dependency>
This extension provides a @WithFunction
annotation that can be used to annotate @QuarkusTest
test cases to start a Cloud Function invoker before you test cases and stop it at the end.
This annotation must be configured with the type of the function you want to launch, and optionally the name of the function in case you have multiple functions inside your application.
The default Quarkus test port configuration (quarkus.http.test-port
) will be honored and if you set it to 0 a random port will be assigned to the function invoker.
Background Functions - PubSub
import static io.restassured.RestAssured.given;
import org.junit.jupiter.api.Test;
import io.quarkus.google.cloud.functions.test.FunctionType;
import io.quarkus.google.cloud.functions.test.WithFunction;
import io.quarkus.test.junit.QuarkusTest;
@QuarkusTest (1)
@WithFunction(FunctionType.FUNQY_BACKGROUND) (2)
class GreetingFunctionsPubsubTest {
@Test
public void test() {
given()
.body("{\"data\":{\"data\":\"world\"}}") (3)
.when()
.post()
.then()
.statusCode(200);
}
}
-
This is a standard Quarkus test that must be annotated by
@QuarkusTest
. -
@WithFunction(FunctionType.FUNQY_BACKGROUND)
indicates to launch the function as a Funqy background function. If multiple functions exist in the same application, thefunctionName
attribute must be used to denote which one should be launched. -
REST-assured is used to test the function,
{"data":"world"}
will be sent to it via the invoker.
Background Functions - Cloud Storage
import static io.restassured.RestAssured.given;
import org.junit.jupiter.api.Test;
import io.quarkus.google.cloud.functions.test.FunctionType;
import io.quarkus.google.cloud.functions.test.WithFunction;
import io.quarkus.test.junit.QuarkusTest;
@QuarkusTest (1)
@WithFunction(FunctionType.FUNQY_BACKGROUND) (2)
class GreetingFunctionsStorageTest {
@Test
public void test() {
given()
.body("{\"data\":{\"name\":\"hello.txt\"}}") (2)
.when()
.post()
.then()
.statusCode(200);
}
}
-
This is a standard Quarkus test that must be annotated by
@QuarkusTest
. -
@WithFunction(FunctionType.FUNQY_BACKGROUND)
indicates to launch the function as a Funqy background function. If multiple functions exist in the same application, thefunctionName
attribute must be used to denote which one should be launched. -
REST-assured is used to test the function,
{"name":"hello.txt"}
will be sent to it via the invoker.
Cloud Events Functions - Cloud Storage
Cloud Events Function is a feature of Cloud Functions gen 2 only. |
import static io.restassured.RestAssured.given;
import org.junit.jupiter.api.Test;
import io.quarkus.google.cloud.functions.test.FunctionType;
import io.quarkus.google.cloud.functions.test.WithFunction;
import io.quarkus.test.junit.QuarkusTest;
@QuarkusTest (1)
@WithFunction(FunctionType.FUNQY_CLOUD_EVENTS) (2)
class GreetingFunctionsCloudEventTest {
@Test
public void test() {
given()
.body("{\n" + (3)
" \"bucket\": \"MY_BUCKET\",\n" +
" \"contentType\": \"text/plain\",\n" +
" \"kind\": \"storage#object\",\n" +
" \"md5Hash\": \"...\",\n" +
" \"metageneration\": \"1\",\n" +
" \"name\": \"MY_FILE.txt\",\n" +
" \"size\": \"352\",\n" +
" \"storageClass\": \"MULTI_REGIONAL\",\n" +
" \"timeCreated\": \"2020-04-23T07:38:57.230Z\",\n" +
" \"timeStorageClassUpdated\": \"2020-04-23T07:38:57.230Z\",\n" +
" \"updated\": \"2020-04-23T07:38:57.230Z\"\n" +
" }")
.header("ce-id", "123451234512345") (4)
.header("ce-specversion", "1.0")
.header("ce-time", "2020-01-02T12:34:56.789Z")
.header("ce-type", "google.cloud.storage.object.v1.finalized")
.header("ce-source", "//storage.googleapis.com/projects/_/buckets/MY-BUCKET-NAME")
.header("ce-subject", "objects/MY_FILE.txt")
.when()
.post()
.then()
.statusCode(200);
}
}
-
This is a standard Quarkus test that must be annotated by
@QuarkusTest
. -
@WithFunction(FunctionType.FUNQY_CLOUD_EVENTS)
indicates to launch the function as a Funqy cloud events function. If multiple functions exist in the same application, thefunctionName
attribute must be used to denote which one should be launched. -
REST-assured is used to test the function, this payload that describe a storage event will be sent to it via the invoker.
-
The cloud events headers must be sent via HTTP headers.
O que vem a seguir?
If you are looking for Jakarta REST, Servlet or Vert.x support for Google Cloud Functions, we have it thanks to our Google Cloud Functions HTTP binding.