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func_createtopic.go
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func_createtopic.go
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// Copyright 2020 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
//
// http://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 gps
import (
"context"
"fmt"
"log"
"regexp"
"strings"
pubsub "cloud.google.com/go/pubsub/apiv1"
"github.com/BrunoReboul/ram/utilities/ram"
pubsubpb "google.golang.org/genproto/googleapis/pubsub/v1"
)
// CreateTopic check if a topic already exist, if not create it
func CreateTopic(ctx context.Context, pubSubPulisherClient *pubsub.PublisherClient, topicListPointer *[]string, topicName string, projectID string) error {
if ram.Find(*topicListPointer, topicName) {
return nil
}
// refresh topic list
err := GetTopicList(ctx, pubSubPulisherClient, projectID, topicListPointer)
if err != nil {
return fmt.Errorf("getTopicList: %v", err)
}
if ram.Find(*topicListPointer, topicName) {
return nil
}
var topicRequested pubsubpb.Topic
topicRequested.Name = fmt.Sprintf("projects/%s/topics/%s", projectID, topicName)
topicRequested.Labels = map[string]string{"name": strings.ToLower(topicName)}
log.Printf("topicRequested %v", topicRequested)
topic, err := pubSubPulisherClient.CreateTopic(ctx, &topicRequested)
if err != nil {
matched, _ := regexp.Match(`.*AlreadyExists.*`, []byte(err.Error()))
if !matched {
return fmt.Errorf("pubSubPulisherClient.CreateTopic: %v", err)
}
log.Println("Try to create but already exist:", topicName)
} else {
log.Println("Created topic:", topic.Name)
}
// refresh topic list
err = GetTopicList(ctx, pubSubPulisherClient, projectID, topicListPointer)
if err != nil {
return fmt.Errorf("getTopicList: %v", err)
}
return nil
}