mirror of https://github.com/tidwall/tile38.git
89 lines
1.4 KiB
Go
89 lines
1.4 KiB
Go
package endpoint
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import (
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"errors"
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"fmt"
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"sync"
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"time"
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"github.com/Shopify/sarama"
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)
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const (
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kafkaExpiresAfter = time.Second * 30
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)
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type KafkaEndpointConn struct {
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mu sync.Mutex
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ep Endpoint
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conn sarama.SyncProducer
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ex bool
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t time.Time
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}
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func (conn *KafkaEndpointConn) Expired() bool {
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conn.mu.Lock()
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defer conn.mu.Unlock()
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if !conn.ex {
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if time.Now().Sub(conn.t) > kafkaExpiresAfter {
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if conn.conn != nil {
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conn.close()
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}
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conn.ex = true
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}
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}
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return conn.ex
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}
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func (conn *KafkaEndpointConn) close() {
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if conn.conn != nil {
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conn.conn.Close()
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conn.conn = nil
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}
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}
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func (conn *KafkaEndpointConn) Send(msg string) error {
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conn.mu.Lock()
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defer conn.mu.Unlock()
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if conn.ex {
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return errExpired
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}
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conn.t = time.Now()
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uri := fmt.Sprintf("%s:%d", conn.ep.Kafka.Host, conn.ep.Kafka.Port)
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if conn.conn == nil {
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c, err := sarama.NewSyncProducer([]string{uri}, nil)
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if err != nil {
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return err
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}
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conn.conn = c
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}
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message := &sarama.ProducerMessage{
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Topic: conn.ep.Kafka.QueueName,
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Value: sarama.StringEncoder(msg),
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}
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_, offset, err := conn.conn.SendMessage(message)
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if err != nil {
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conn.close()
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return err
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}
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if offset < 0 {
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conn.close()
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return errors.New("invalid kafka reply")
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}
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return nil
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}
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func newKafkaEndpointConn(ep Endpoint) *KafkaEndpointConn {
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return &KafkaEndpointConn{
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ep: ep,
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t: time.Now(),
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}
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}
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