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[[["Facile da capire","easyToUnderstand","thumb-up"],["Il problema è stato risolto","solvedMyProblem","thumb-up"],["Altra","otherUp","thumb-up"]],[["Difficile da capire","hardToUnderstand","thumb-down"],["Informazioni o codice di esempio errati","incorrectInformationOrSampleCode","thumb-down"],["Mancano le informazioni o gli esempi di cui ho bisogno","missingTheInformationSamplesINeed","thumb-down"],["Problema di traduzione","translationIssue","thumb-down"],["Altra","otherDown","thumb-down"]],[],[],[],null,["# List Lite topics in a project.\n\nExplore further\n---------------\n\n\nFor detailed documentation that includes this code sample, see the following:\n\n- [Create and manage Lite topics](/pubsub/lite/docs/topics)\n\nCode sample\n-----------\n\n### Go\n\n\nTo authenticate to Pub/Sub Lite, set up Application Default Credentials.\nFor more information, see\n\n[Set up authentication for a local development environment](/docs/authentication/set-up-adc-local-dev-environment).\n\n import (\n \t\"context\"\n \t\"fmt\"\n \t\"io\"\n\n \t\"cloud.google.com/go/pubsublite\"\n \t\"google.golang.org/api/iterator\"\n )\n\n func listTopics(w io.Writer, projectID, region, zone string) error {\n \t// projectID := \"my-project-id\"\n \t// region := \"us-central1\"\n \t// zone := \"us-central1-a\"\n \tctx := context.Background()\n \tclient, err := pubsublite.NewAdminClient(ctx, region)\n \tif err != nil {\n \t\treturn fmt.Errorf(\"pubsublite.NewAdminClient: %w\", err)\n \t}\n \tdefer client.Close()\n\n \tparent := fmt.Sprintf(\"projects/%s/locations/%s\", projectID, zone)\n \ttopicIter := client.https://cloud.google.com/go/docs/reference/cloud.google.com/go/pubsublite/latest/index.html#cloud_google_com_go_pubsublite_AdminClient_Topics(ctx, parent)\n \tfor {\n \t\ttopic, err := topicIter.Next()\n \t\tif err == iterator.Done {\n \t\t\tbreak\n \t\t}\n \t\tif err != nil {\n \t\t\treturn fmt.Errorf(\"topicIter.Next got err: %w\", err)\n \t\t}\n \t\tfmt.Fprintf(w, \"Got topic: %#v\\n\", topic)\n \t}\n \treturn nil\n }\n\n### Java\n\n\nTo authenticate to Pub/Sub Lite, set up Application Default Credentials.\nFor more information, see\n\n[Set up authentication for a local development environment](/docs/authentication/set-up-adc-local-dev-environment).\n\n import com.google.cloud.pubsublite.https://cloud.google.com/java/docs/reference/google-cloud-pubsublite/latest/com.google.cloud.pubsublite.AdminClient.html;\n import com.google.cloud.pubsublite.https://cloud.google.com/java/docs/reference/google-cloud-pubsublite/latest/com.google.cloud.pubsublite.AdminClientSettings.html;\n import com.google.cloud.pubsublite.https://cloud.google.com/java/docs/reference/google-cloud-pubsublite/latest/com.google.cloud.pubsublite.CloudRegion.html;\n import com.google.cloud.pubsublite.https://cloud.google.com/java/docs/reference/google-cloud-pubsublite/latest/com.google.cloud.pubsublite.CloudRegionOrZone.html;\n import com.google.cloud.pubsublite.https://cloud.google.com/java/docs/reference/google-cloud-pubsublite/latest/com.google.cloud.pubsublite.CloudZone.html;\n import com.google.cloud.pubsublite.https://cloud.google.com/java/docs/reference/google-cloud-pubsublite/latest/com.google.cloud.pubsublite.LocationPath.html;\n import com.google.cloud.pubsublite.https://cloud.google.com/java/docs/reference/google-cloud-pubsublite/latest/com.google.cloud.pubsublite.ProjectNumber.html;\n import com.google.cloud.pubsublite.proto.https://cloud.google.com/java/docs/reference/google-cloud-pubsublite/latest/com.google.cloud.pubsublite.proto.Topic.html;\n import java.util.List;\n\n public class ListTopicsExample {\n\n public static void main(String... args) throws Exception {\n // TODO(developer): Replace these variables before running the sample.\n String cloudRegion = \"your-cloud-region\";\n char zoneId = 'b';\n long projectNumber = Long.parseLong(\"123456789\");\n // True if using a regional location. False if using a zonal location.\n // https://cloud.google.com/pubsub/lite/docs/topics\n boolean regional = true;\n\n listTopicsExample(cloudRegion, zoneId, projectNumber, regional);\n }\n\n public static void listTopicsExample(\n String cloudRegion, char zoneId, long projectNumber, boolean regional) throws Exception {\n\n https://cloud.google.com/java/docs/reference/google-cloud-pubsublite/latest/com.google.cloud.pubsublite.AdminClientSettings.html adminClientSettings =\n https://cloud.google.com/java/docs/reference/google-cloud-pubsublite/latest/com.google.cloud.pubsublite.AdminClientSettings.html.newBuilder().setRegion(https://cloud.google.com/java/docs/reference/google-cloud-pubsublite/latest/com.google.cloud.pubsublite.CloudRegion.html.of(cloudRegion)).build();\n\n https://cloud.google.com/java/docs/reference/google-cloud-pubsublite/latest/com.google.cloud.pubsublite.CloudRegionOrZone.html location;\n if (regional) {\n location = https://cloud.google.com/java/docs/reference/google-cloud-pubsublite/latest/com.google.cloud.pubsublite.CloudRegionOrZone.html.of(https://cloud.google.com/java/docs/reference/google-cloud-pubsublite/latest/com.google.cloud.pubsublite.CloudRegion.html.of(cloudRegion));\n } else {\n location = https://cloud.google.com/java/docs/reference/google-cloud-pubsublite/latest/com.google.cloud.pubsublite.CloudRegionOrZone.html.of(https://cloud.google.com/java/docs/reference/google-cloud-pubsublite/latest/com.google.cloud.pubsublite.CloudZone.html.of(https://cloud.google.com/java/docs/reference/google-cloud-pubsublite/latest/com.google.cloud.pubsublite.CloudRegion.html.of(cloudRegion), zoneId));\n }\n\n https://cloud.google.com/java/docs/reference/google-cloud-pubsublite/latest/com.google.cloud.pubsublite.LocationPath.html locationPath =\n https://cloud.google.com/java/docs/reference/google-cloud-pubsublite/latest/com.google.cloud.pubsublite.LocationPath.html.newBuilder()\n .setProject(https://cloud.google.com/java/docs/reference/google-cloud-pubsublite/latest/com.google.cloud.pubsublite.ProjectNumber.html.of(projectNumber))\n .setLocation(location)\n .build();\n\n try (https://cloud.google.com/java/docs/reference/google-cloud-pubsublite/latest/com.google.cloud.pubsublite.AdminClient.html adminClient = https://cloud.google.com/java/docs/reference/google-cloud-pubsublite/latest/com.google.cloud.pubsublite.AdminClient.html.create(adminClientSettings)) {\n List\u003cTopic\u003e topics = adminClient.listTopics(locationPath).get();\n for (https://cloud.google.com/java/docs/reference/google-cloud-pubsublite/latest/com.google.cloud.pubsublite.proto.Topic.html topic : topics) {\n System.out.println(topic.getAllFields());\n }\n System.out.println(topics.size() + \" topic(s) listed.\");\n }\n }\n }\n\n### Python\n\n\nTo authenticate to Pub/Sub Lite, set up Application Default Credentials.\nFor more information, see\n\n[Set up authentication for a local development environment](/docs/authentication/set-up-adc-local-dev-environment).\n\n from google.cloud.pubsublite import https://cloud.google.com/python/docs/reference/pubsublite/latest/google.cloud.pubsublite.admin_client.AdminClient.html\n from google.cloud.pubsublite.types import https://cloud.google.com/python/docs/reference/pubsublite/latest/google.cloud.pubsublite.types.CloudRegion.html, https://cloud.google.com/python/docs/reference/pubsublite/latest/google.cloud.pubsublite.types.CloudZone.html, https://cloud.google.com/python/docs/reference/pubsublite/latest/google.cloud.pubsublite.types.LocationPath.html\n\n # TODO(developer):\n # project_number = 1122334455\n # cloud_region = \"us-central1\"\n # zone_id = \"a\"\n # regional = True\n\n location = None\n if regional:\n # A region.\n location = CloudRegion(cloud_region)\n else:\n # A zone.\n location = CloudZone(CloudRegion(cloud_region), zone_id)\n\n location_path = LocationPath(project_number, location)\n\n client = AdminClient(cloud_region)\n response = client.https://cloud.google.com/python/docs/reference/pubsublite/latest/google.cloud.pubsublite.admin_client.AdminClient.html#google_cloud_pubsublite_admin_client_AdminClient_list_topics(location_path)\n\n for topic in response:\n print(topic)\n\n print(f\"{len(response)} topic(s) listed in your project and location.\")\n\nWhat's next\n-----------\n\n\nTo search and filter code samples for other Google Cloud products, see the\n[Google Cloud sample browser](/docs/samples?product=pubsublite)."]]