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list_topics.go
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/
list_topics.go
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// Copyright 2019 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package topics
// [START pubsub_list_topics]
import (
"context"
"fmt"
"cloud.google.com/go/pubsub"
"google.golang.org/api/iterator"
)
func list(projectID string) ([]*pubsub.Topic, error) {
// projectID := "my-project-id"
ctx := context.Background()
client, err := pubsub.NewClient(ctx, projectID)
if err != nil {
return nil, fmt.Errorf("pubsub.NewClient: %v", err)
}
var topics []*pubsub.Topic
it := client.Topics(ctx)
for {
topic, err := it.Next()
if err == iterator.Done {
break
}
if err != nil {
return nil, fmt.Errorf("Next: %v", err)
}
topics = append(topics, topic)
}
return topics, nil
}
// [END pubsub_list_topics]