List Lite Reservations

Lite Pub/Sub Lite reservations

Explore further

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

• Create and manage Lite reservations

Code sample

Go

To authenticate to Pub/Sub Lite, set up Application Default Credentials. For more information, see Set up authentication for a local development environment.

import (
	"context"
	"fmt"
	"io"

	"cloud.google.com/go/pubsublite"
	"google.golang.org/api/iterator"
)

func listReservations(w io.Writer, projectID, region string) error {
	// projectID := "my-project-id"
	// region := "us-central1"
	ctx := context.Background()
	client, err := pubsublite.NewAdminClient(ctx, region)
	if err != nil {
		return fmt.Errorf("pubsublite.NewAdminClient: %w", err)
	}
	defer client.Close()

	parent := fmt.Sprintf("projects/%s/locations/%s", projectID, region)
	resIter := client.Reservations(ctx, parent)
	for {
		res, err := resIter.Next()
		if err == iterator.Done {
			break
		}
		if err != nil {
			return fmt.Errorf("resIter.Next() got err: %w", err)
		}
		fmt.Fprintf(w, "Got reservation config: %v", res)
	}
	return nil
}

Java

To authenticate to Pub/Sub Lite, set up Application Default Credentials. For more information, see Set up authentication for a local development environment.

import com.google.cloud.pubsublite.AdminClient;
import com.google.cloud.pubsublite.AdminClientSettings;
import com.google.cloud.pubsublite.CloudRegion;
import com.google.cloud.pubsublite.LocationPath;
import com.google.cloud.pubsublite.ProjectNumber;
import com.google.cloud.pubsublite.proto.Reservation;
import java.util.List;

public class ListReservationsExample {

  public static void main(String... args) throws Exception {
    // TODO(developer): Replace these variables before running the sample.
    long projectNumber = Long.parseLong("123456789");
    String cloudRegion = "your-cloud-region";

    listReservationsExample(projectNumber, cloudRegion);
  }

  public static void listReservationsExample(long projectNumber, String cloudRegion)
      throws Exception {

    AdminClientSettings adminClientSettings =
        AdminClientSettings.newBuilder().setRegion(CloudRegion.of(cloudRegion)).build();

    LocationPath locationPath =
        LocationPath.newBuilder()
            .setProject(ProjectNumber.of(projectNumber))
            .setLocation(CloudRegion.of(cloudRegion))
            .build();

    try (AdminClient adminClient = AdminClient.create(adminClientSettings)) {
      List<Reservation> reservations = adminClient.listReservations(locationPath).get();
      for (Reservation reservation : reservations) {
        System.out.println(reservation.getAllFields());
      }
      System.out.println(reservations.size() + " reservation(s) listed in " + locationPath + ".");
    }
  }
}

Python

To authenticate to Pub/Sub Lite, set up Application Default Credentials. For more information, see Set up authentication for a local development environment.

from google.cloud.pubsublite import AdminClient
from google.cloud.pubsublite.types import LocationPath

# TODO(developer):
# project_number = 1122334455
# cloud_region = "us-central1"

location_path = LocationPath(project_number, cloud_region)

client = AdminClient(cloud_region)
response = client.list_reservations(location_path)

for reservation in response:
    print(reservation)

print(f"{len(response)} reservation(s) listed in your project and location.")

What's next

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