98 lines
2.3 KiB
Go
98 lines
2.3 KiB
Go
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package queue
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import (
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"context"
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"encoding/base64"
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"fmt"
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"time"
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"github.com/wormhole-foundation/wormhole-explorer/fly/internal/sqs"
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"github.com/wormhole-foundation/wormhole/sdk/vaa"
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"go.uber.org/zap"
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)
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// SQSOption represents a VAA queue in SQS option function.
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type SQSOption func(*SQS)
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// SQS represents a VAA queue in SQS.
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type SQS struct {
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producer *sqs.Producer
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consumer *sqs.Consumer
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ch chan *Message
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chSize int
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logger *zap.Logger
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}
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// NewVAASQS creates a VAA queue in SQS instances.
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func NewVAASQS(producer *sqs.Producer, consumer *sqs.Consumer, logger *zap.Logger, opts ...SQSOption) *SQS {
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s := &SQS{
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producer: producer,
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consumer: consumer,
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chSize: 10,
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logger: logger}
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for _, opt := range opts {
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opt(s)
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}
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s.ch = make(chan *Message, s.chSize)
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return s
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}
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// WithChannelSize allows to specify an channel size when setting a value.
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func WithChannelSize(size int) SQSOption {
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return func(d *SQS) {
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d.chSize = size
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}
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}
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// Publish sends the message to a SQS queue.
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func (q *SQS) Publish(_ context.Context, v *vaa.VAA, data []byte) error {
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body := base64.StdEncoding.EncodeToString(data)
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groupID := fmt.Sprintf("%d/%s", v.EmitterChain, v.EmitterAddress)
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return q.producer.SendMessage(groupID, v.MessageID(), body)
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}
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// Consume returns the channel with the received messages from SQS queue.
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func (q *SQS) Consume(ctx context.Context) <-chan *Message {
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go func() {
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for {
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select {
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case <-ctx.Done():
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return
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default:
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messages, err := q.consumer.GetMessages()
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if err != nil {
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q.logger.Error("Error getting messages from SQS", zap.Error(err))
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continue
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}
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expiredAt := time.Now().Add(q.consumer.GetVisibilityTimeout())
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for _, msg := range messages {
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body, err := base64.StdEncoding.DecodeString(*msg.Body)
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if err != nil {
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q.logger.Error("Error decoding message from SQS", zap.Error(err))
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continue
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}
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//TODO check if callback is better than channel
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q.ch <- &Message{
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Data: body,
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Ack: func() {
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if err := q.consumer.DeleteMessage(msg); err != nil {
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q.logger.Error("Error deleting message from SQS", zap.Error(err))
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}
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},
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IsExpired: func() bool {
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return expiredAt.Before(time.Now())
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},
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}
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}
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}
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}
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}()
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return q.ch
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}
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// Close closes all consumer resources.
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func (q *SQS) Close() {
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close(q.ch)
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}
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