Cloud Functions

​Cloud Function is a scalable, pay as you go, Functions-as-a-Service (FaaS).
Spring Cloud Functions has pre-GA support for Cloud Functions for Java 11. See Spring Cloud Functions Reference Documentation for more details.
This guide currently uses a non-Spring example for Cloud Functions.
Getting Started
Clone
cd $HOME
git clone https://github.com/GoogleCloudPlatform/java-docs-samples
cd java-docs-samples/functions/helloworld/helloworld
Build
mvn package
Run Locally
mvn function:run
​
# In a different tab, trigger the function:
curl localhost:8080
Deploy
Enable API
gcloud services enable cloudfunctions.googleapis.com
Deploy
gcloud functions deploy helloworld --trigger-http \
  --runtime=java11 \
  --entry-point=functions.HelloWorld \
  --allow-unauthenticated
Connect
Once a HTTP function is deployed, you can connect to it using curl. You can also find the URL:
gcloud functions describe helloworld --format='value(httpsTrigger.url)'
Trigger the function with curl:
URL=$(gcloud functions describe helloworld --format='value(httpsTrigger.url)')
​
curl ${URL}
Alternatively, you can also use gcloud:
gcloud functions call helloworld
Additional Configurations
By default, Cloud Functions will deploy to the smallest 256MB instance. You can specify a larger instance and configure environment variables with the gcloud CLI:
gcloud functions deploy helloworld --trigger-http \
  --runtime=java11 \
  --memory=512M
  --entry-point=functions.HelloWorld \
  --allow-unauthenticated
Learn More
​Cloud Functions Java Runtime documentation​
​Framework support for Spring Cloud Functions, Micronaut, Quarkus​

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Additional Configurations

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