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create_task.go
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create_task.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.
// [START cloud_tasks_appengine_create_task]
// Command create_task constructs and adds a task to an App Engine Queue.
package main
import (
"context"
"fmt"
cloudtasks "cloud.google.com/go/cloudtasks/apiv2"
taskspb "google.golang.org/genproto/googleapis/cloud/tasks/v2"
)
// createTask creates a new task in your App Engine queue.
func createTask(projectID, locationID, queueID, message string) (*taskspb.Task, error) {
// Create a new Cloud Tasks client instance.
// See https://godoc.org/cloud.google.com/go/cloudtasks/apiv2
ctx := context.Background()
client, err := cloudtasks.NewClient(ctx)
if err != nil {
return nil, fmt.Errorf("NewClient: %v", err)
}
// Build the Task queue path.
queuePath := fmt.Sprintf("projects/%s/locations/%s/queues/%s", projectID, locationID, queueID)
// Build the Task payload.
// https://godoc.org/google.golang.org/genproto/googleapis/cloud/tasks/v2#CreateTaskRequest
req := &taskspb.CreateTaskRequest{
Parent: queuePath,
Task: &taskspb.Task{
// https://godoc.org/google.golang.org/genproto/googleapis/cloud/tasks/v2#AppEngineHttpRequest
MessageType: &taskspb.Task_AppEngineHttpRequest{
AppEngineHttpRequest: &taskspb.AppEngineHttpRequest{
HttpMethod: taskspb.HttpMethod_POST,
RelativeUri: "/task_handler",
},
},
},
}
// Add a payload message if one is present.
req.Task.GetAppEngineHttpRequest().Body = []byte(message)
createdTask, err := client.CreateTask(ctx, req)
if err != nil {
return nil, fmt.Errorf("cloudtasks.CreateTask: %v", err)
}
return createdTask, nil
}
// [END cloud_tasks_appengine_create_task]