mirror of
https://github.com/nats-io/nats.go.git
synced 2025-10-07 17:42:09 +08:00
80 lines
1.8 KiB
Go
80 lines
1.8 KiB
Go
// Copyright 2020-2022 The NATS 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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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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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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package main
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import (
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"context"
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"fmt"
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"log"
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"time"
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"github.com/nats-io/nats.go"
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"github.com/nats-io/nats.go/jetstream"
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)
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func main() {
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ctx, cancel := context.WithTimeout(context.Background(), 60*time.Minute)
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defer cancel()
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nc, err := nats.Connect("nats://127.0.0.1:4222")
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if err != nil {
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log.Fatal(err)
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}
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js, err := jetstream.New(nc)
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if err != nil {
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log.Fatal(err)
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}
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s, err := js.CreateStream(ctx, jetstream.StreamConfig{
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Name: "TEST_STREAM",
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Subjects: []string{"FOO.*"},
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})
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if err != nil {
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log.Fatal(err)
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}
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cons, err := s.CreateOrUpdateConsumer(ctx, jetstream.ConsumerConfig{
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Durable: "TestConsumerListener",
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AckPolicy: jetstream.AckExplicitPolicy,
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})
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if err != nil {
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log.Fatal(err)
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}
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go endlessPublish(ctx, nc, js)
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for {
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msg, err := cons.Next()
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if err != nil {
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fmt.Println(err)
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continue
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}
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fmt.Println(string(msg.Data()))
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msg.Ack()
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}
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}
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func endlessPublish(ctx context.Context, nc *nats.Conn, js jetstream.JetStream) {
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var i int
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for {
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time.Sleep(500 * time.Millisecond)
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if nc.Status() != nats.CONNECTED {
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continue
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}
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if _, err := js.Publish(ctx, "FOO.TEST1", []byte(fmt.Sprintf("msg %d", i))); err != nil {
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fmt.Println("pub error: ", err)
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}
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i++
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}
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}
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