73 lines
1.8 KiB
Go
73 lines
1.8 KiB
Go
package natsio
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import (
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"errors"
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"fmt"
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"github.com/nats-io/nats.go"
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)
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func generateStreamConfig(stream string, subjects []string) *nats.StreamConfig {
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cfg := nats.StreamConfig{
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Name: stream,
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Subjects: subjects,
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Retention: nats.WorkQueuePolicy,
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MaxConsumers: -1,
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MaxMsgSize: -1,
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MaxMsgs: -1,
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NoAck: false,
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}
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return &cfg
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}
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// GetStreamInfo ...
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func (js JetStream) GetStreamInfo() (*nats.StreamInfo, error) {
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return js.instance.StreamInfo(js.streamName)
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}
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// addStream add new stream, with default config
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func (js JetStream) addStream() {
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// get info about the stream
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stream, _ := js.GetStreamInfo()
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// if stream not found, create new
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if stream == nil {
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_, err := js.instance.AddStream(generateStreamConfig(js.streamName, []string{}))
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if err != nil {
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fmt.Printf("[natsio.JetStream] add stream %s error: %s \n", js.streamName, err.Error())
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}
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}
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}
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// DeleteStream ...
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func (js JetStream) DeleteStream() error {
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if err := js.instance.DeleteStream(js.streamName); err != nil {
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msg := fmt.Sprintf("[natsio.JetStream] delete stream %s error: %s", js.streamName, err.Error())
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return errors.New(msg)
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}
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return nil
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}
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// AddSubjects ...
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func (js JetStream) AddSubjects(subjects []string) error {
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// get stream info
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stream, _ := js.GetStreamInfo()
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if stream == nil {
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msg := fmt.Sprintf("[natsio.JetStream] error when adding stream #%s subjects: stream not found", js.streamName)
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return errors.New(msg)
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}
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// merge current and new subjects
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newSubjects := mergeAndUniqueArrayStrings(subjects, stream.Config.Subjects)
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// update
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_, err := js.instance.UpdateStream(generateStreamConfig(js.streamName, newSubjects))
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if err != nil {
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msg := fmt.Sprintf("[natsio.JetStream] add subject to stream #%s error: %s", js.streamName, err.Error())
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return errors.New(msg)
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}
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return nil
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}
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