Create App Engine tasks

Creates App Engine tasks for migrating from taskqueues example.

Explore further

For detailed documentation that includes this code sample, see the following:

• Migrating push queues to Cloud Tasks

Code sample

Java

To learn how to install and use the client library for Cloud Tasks, see Cloud Tasks client libraries.

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import com.google.cloud.tasks.v2.AppEngineHttpRequest;
import com.google.cloud.tasks.v2.CloudTasksClient;
import com.google.cloud.tasks.v2.HttpMethod;
import com.google.cloud.tasks.v2.QueueName;
import com.google.cloud.tasks.v2.Task;
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

@WebServlet(
    name = "TaskEnqueue",
    description = "Enqueue a task targeted at endpoint '/cloudtasks/worker'",
    urlPatterns = "/cloudtasks/enqueue")
public class Enqueue extends HttpServlet {

  // TODO(developer): Replace these variables before running the sample.
  static final String projectId = "my-project-id";
  static final String locationId = "us-central1";

  // Function creates Cloud Tasks from form submissions.
  protected void doPost(HttpServletRequest request, HttpServletResponse response)
      throws ServletException, IOException {
    String key = request.getParameter("key");

    try (CloudTasksClient client = CloudTasksClient.create()) {
      // Construct the fully qualified queue name.
      String queueName = QueueName.of(projectId, locationId, "default").toString();

      // Construct the task body.
      Task task =
          Task.newBuilder()
              .setAppEngineHttpRequest(
                  AppEngineHttpRequest.newBuilder()
                      .setRelativeUri("/cloudtasks/worker?key=" + key)
                      .setHttpMethod(HttpMethod.POST)
                      .build())
              .build();

      // Add the task to the default queue.
      Task taskResponse = client.createTask(queueName, task);
      System.out.println("Task created: " + taskResponse.getName());
    }

    response.sendRedirect("/");
  }
}

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