153 lines
3.6 KiB
Go
153 lines
3.6 KiB
Go
/*
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Copyright 2021 The Dapr Authors
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package sqs
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import (
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"encoding/json"
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"time"
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"github.com/aws/aws-sdk-go/aws"
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"github.com/aws/aws-sdk-go/service/sqs"
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aws_auth "github.com/dapr/components-contrib/authentication/aws"
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"github.com/dapr/components-contrib/bindings"
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"github.com/dapr/kit/logger"
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)
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// AWSSQS allows receiving and sending data to/from AWS SQS.
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type AWSSQS struct {
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Client *sqs.SQS
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QueueURL *string
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logger logger.Logger
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}
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type sqsMetadata struct {
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QueueName string `json:"queueName"`
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Region string `json:"region"`
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Endpoint string `json:"endpoint"`
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AccessKey string `json:"accessKey"`
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SecretKey string `json:"secretKey"`
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SessionToken string `json:"sessionToken"`
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}
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// NewAWSSQS returns a new AWS SQS instance.
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func NewAWSSQS(logger logger.Logger) *AWSSQS {
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return &AWSSQS{logger: logger}
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}
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// Init does metadata parsing and connection creation.
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func (a *AWSSQS) Init(metadata bindings.Metadata) error {
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m, err := a.parseSQSMetadata(metadata)
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if err != nil {
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return err
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}
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client, err := a.getClient(m)
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if err != nil {
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return err
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}
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queueName := m.QueueName
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resultURL, err := client.GetQueueUrl(&sqs.GetQueueUrlInput{
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QueueName: aws.String(queueName),
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})
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if err != nil {
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return err
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}
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a.QueueURL = resultURL.QueueUrl
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a.Client = client
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return nil
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}
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func (a *AWSSQS) Operations() []bindings.OperationKind {
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return []bindings.OperationKind{bindings.CreateOperation}
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}
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func (a *AWSSQS) Invoke(req *bindings.InvokeRequest) (*bindings.InvokeResponse, error) {
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msgBody := string(req.Data)
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_, err := a.Client.SendMessage(&sqs.SendMessageInput{
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MessageBody: &msgBody,
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QueueUrl: a.QueueURL,
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})
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return nil, err
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}
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func (a *AWSSQS) Read(handler func(*bindings.ReadResponse) ([]byte, error)) error {
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for {
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result, err := a.Client.ReceiveMessage(&sqs.ReceiveMessageInput{
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QueueUrl: a.QueueURL,
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AttributeNames: aws.StringSlice([]string{
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"SentTimestamp",
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}),
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MaxNumberOfMessages: aws.Int64(1),
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MessageAttributeNames: aws.StringSlice([]string{
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"All",
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}),
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WaitTimeSeconds: aws.Int64(20),
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})
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if err != nil {
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a.logger.Errorf("Unable to receive message from queue %q, %v.", *a.QueueURL, err)
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}
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if len(result.Messages) > 0 {
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for _, m := range result.Messages {
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body := m.Body
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res := bindings.ReadResponse{
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Data: []byte(*body),
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}
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_, err := handler(&res)
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if err == nil {
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msgHandle := m.ReceiptHandle
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a.Client.DeleteMessage(&sqs.DeleteMessageInput{
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QueueUrl: a.QueueURL,
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ReceiptHandle: msgHandle,
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})
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}
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}
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}
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time.Sleep(time.Millisecond * 50)
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}
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}
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func (a *AWSSQS) parseSQSMetadata(metadata bindings.Metadata) (*sqsMetadata, error) {
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b, err := json.Marshal(metadata.Properties)
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if err != nil {
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return nil, err
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}
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var m sqsMetadata
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err = json.Unmarshal(b, &m)
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if err != nil {
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return nil, err
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}
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return &m, nil
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}
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func (a *AWSSQS) getClient(metadata *sqsMetadata) (*sqs.SQS, error) {
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sess, err := aws_auth.GetClient(metadata.AccessKey, metadata.SecretKey, metadata.SessionToken, metadata.Region, metadata.Endpoint)
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if err != nil {
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return nil, err
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}
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c := sqs.New(sess)
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return c, nil
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}
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