Execution after timeout

Sample that demonstrates code that should (but won't) execute after a GCF call times out.

Code sample

Go

To authenticate to Cloud Functions, set up Application Default Credentials. For more information, see Set up authentication for a local development environment.

// Package tips contains tips for writing Cloud Functions in Go.
package tips

import (
	"fmt"
	"log"
	"net/http"
	"time"

	"github.com/GoogleCloudPlatform/functions-framework-go/functions"
)

func init() {
	functions.HTTP("Timeout", Timeout)
}

// Timeout sleeps for 2 minutes and may time out before finishing.
func Timeout(w http.ResponseWriter, r *http.Request) {
	log.Println("Function execution started...")
	time.Sleep(2 * time.Minute)
	log.Println("Function completed!")
	fmt.Fprintln(w, "Function completed!")
}

Java

To authenticate to Cloud Functions, set up Application Default Credentials. For more information, see Set up authentication for a local development environment.

package functions;

import com.google.cloud.functions.HttpFunction;
import com.google.cloud.functions.HttpRequest;
import com.google.cloud.functions.HttpResponse;
import java.io.BufferedWriter;
import java.io.IOException;
import java.util.concurrent.TimeUnit;
import java.util.logging.Logger;

public class AfterTimeout implements HttpFunction {
  private static final Logger logger = Logger.getLogger(AfterTimeout.class.getName());

  // Simple function to return "Hello World"
  @Override
  public void service(HttpRequest request, HttpResponse response)
      throws IOException, InterruptedException {
    logger.info("Function running...");
    TimeUnit.MINUTES.sleep(2);

    // May not execute if function's timeout is <2 minutes
    logger.info("Function completed!");
    BufferedWriter writer = response.getWriter();
    writer.write("Function completed!");
  }
}

Node.js

To authenticate to Cloud Functions, set up Application Default Credentials. For more information, see Set up authentication for a local development environment.

const functions = require('@google-cloud/functions-framework');

/**
 * HTTP Cloud Function that may not completely
 * execute due to function execution timeout
 *
 * @param {Object} req Cloud Function request context.
 * @param {Object} res Cloud Function response context.
 */
functions.http('afterTimeout', (req, res) => {
  setTimeout(() => {
    // May not execute if function's timeout is <2 minutes
    console.log('Function running...');
    res.end();
  }, 120000); // 2 minute delay
});

Python

To authenticate to Cloud Functions, set up Application Default Credentials. For more information, see Set up authentication for a local development environment.

import time

import functions_framework


@functions_framework.http
def timeout(request):
    print("Function running...")
    time.sleep(120)

    # May not execute if function's timeout is <2 minutes
    print("Function completed!")
    return "Function completed!"

What's next

To search and filter code samples for other Google Cloud products, see the Google Cloud sample browser.