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如需查看包含此代码示例的详细文档,请参阅以下内容:
代码示例
Go
如需向 Pub/Sub Lite 进行身份验证,请设置应用默认凭据。如需了解详情,请参阅为本地开发环境设置身份验证。
import (
"context"
"fmt"
"io"
"cloud.google.com/go/pubsublite"
"google.golang.org/api/iterator"
)
func listSubscriptionsInProject(w io.Writer, projectID, region, location string) error {
// projectID := "my-project-id"
// region := "us-central1"
// NOTE: location can be either a region ("us-central1") or a zone ("us-central1-a")
// For a list of valid locations, see https://cloud.google.com/pubsub/lite/docs/locations.
// location := "us-central1"
ctx := context.Background()
client, err := pubsublite.NewAdminClient(ctx, region)
if err != nil {
return fmt.Errorf("pubsublite.NewAdminClient: %w", err)
}
defer client.Close()
// To list topics in a region, set location to a cloud region instead.
parent := fmt.Sprintf("projects/%s/locations/%s", projectID, location)
subIter := client.Subscriptions(ctx, parent)
for {
sub, err := subIter.Next()
if err == iterator.Done {
break
}
if err != nil {
return fmt.Errorf("subIter.Next() got err: %w", err)
}
fmt.Fprintf(w, "Got subscription config: %v", sub)
}
return nil
}
Java
如需向 Pub/Sub Lite 进行身份验证,请设置应用默认凭据。如需了解详情,请参阅为本地开发环境设置身份验证。
import com.google.cloud.pubsublite.AdminClient;
import com.google.cloud.pubsublite.AdminClientSettings;
import com.google.cloud.pubsublite.CloudRegion;
import com.google.cloud.pubsublite.CloudRegionOrZone;
import com.google.cloud.pubsublite.CloudZone;
import com.google.cloud.pubsublite.LocationPath;
import com.google.cloud.pubsublite.ProjectNumber;
import com.google.cloud.pubsublite.proto.Subscription;
import java.util.List;
public class ListSubscriptionsInProjectExample {
public static void main(String... args) throws Exception {
// TODO(developer): Replace these variables before running the sample.
String cloudRegion = "your-cloud-region";
char zoneId = 'b';
long projectNumber = Long.parseLong("123456789");
// True if using a regional location. False if using a zonal location.
// https://cloud.google.com/pubsub/lite/docs/topics
boolean regional = true;
listSubscriptionsInProjectExample(cloudRegion, zoneId, projectNumber, regional);
}
public static void listSubscriptionsInProjectExample(
String cloudRegion, char zoneId, long projectNumber, boolean regional) throws Exception {
AdminClientSettings adminClientSettings =
AdminClientSettings.newBuilder().setRegion(CloudRegion.of(cloudRegion)).build();
CloudRegionOrZone location;
if (regional) {
location = CloudRegionOrZone.of(CloudRegion.of(cloudRegion));
} else {
location = CloudRegionOrZone.of(CloudZone.of(CloudRegion.of(cloudRegion), zoneId));
}
LocationPath locationPath =
LocationPath.newBuilder()
.setProject(ProjectNumber.of(projectNumber))
.setLocation(location)
.build();
try (AdminClient adminClient = AdminClient.create(adminClientSettings)) {
List<Subscription> subscriptions = adminClient.listSubscriptions(locationPath).get();
for (Subscription subscription : subscriptions) {
System.out.println(subscription.getAllFields());
}
System.out.println(subscriptions.size() + " subscription(s) listed in the project.");
}
}
}
Python
如需向 Pub/Sub Lite 进行身份验证,请设置应用默认凭据。如需了解详情,请参阅为本地开发环境设置身份验证。
from google.cloud.pubsublite import AdminClient
from google.cloud.pubsublite.types import CloudRegion, CloudZone, LocationPath
# TODO(developer):
# project_number = 1122334455
# cloud_region = "us-central1"
# zone_id = "a"
# regional = True
if regional:
location = CloudRegion(cloud_region)
else:
location = CloudZone(CloudRegion(cloud_region), zone_id)
location_path = LocationPath(project_number, location)
client = AdminClient(cloud_region)
response = client.list_subscriptions(location_path)
for subscription in response:
print(subscription.name)
print(f"{len(response)} subscription(s) listed in your project and location.")
后续步骤
如需搜索和过滤其他 Google Cloud 产品的代码示例,请参阅 Google Cloud 示例浏览器。