/
main.go
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/
main.go
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/*
* Copyright (c) 2008-2021, Hazelcast, Inc. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License")
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package main
import (
"context"
"fmt"
"log"
"math/rand"
"time"
"github.com/hazelcast/hazelcast-go-client"
)
// messageListener handles incoming messages to the topic
func messageListener(event *hazelcast.MessagePublished) {
fmt.Println("Received message: ", event.Value)
}
func main() {
messageCount := 10
// Start the client with defaults
ctx := context.TODO()
client, err := hazelcast.StartNewClient(ctx)
if err != nil {
log.Fatal(err)
}
// Get a random topic
rand.Seed(time.Now().Unix())
topicName := fmt.Sprintf("sample-%d", rand.Int())
topic, err := client.GetTopic(ctx, topicName)
if err != nil {
log.Fatal(err)
}
// Add a message listener to the topic
_, err = topic.AddMessageListener(ctx, messageListener)
if err != nil {
log.Fatal(err)
}
// Publish messages to topic
for i := 0; i < messageCount; i++ {
err := topic.Publish(ctx, fmt.Sprintf("Message %d", i))
if err != nil {
log.Fatal(err)
}
}
// Shutdown client
client.Shutdown(ctx)
}