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// Copyright 2019-2025 The Wait4X Authors
//
// 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 is the main package for the TCP Basic example.
package main
import (
"context"
"fmt"
"log"
"time"
"wait4x.dev/v3/checker/tcp"
"wait4x.dev/v3/waiter"
)
// main is the main function for the TCP Basic example
func main() {
// Create a context with a 30-second timeout
ctx, cancel := context.WithTimeout(context.Background(), 30*time.Second)
defer cancel()
// Create a TCP checker for localhost:6379 with a 5-second connection timeout
tcpChecker := tcp.New("localhost:6379", tcp.WithTimeout(5*time.Second))
// Specify waiter options
options := []waiter.Option{
waiter.WithTimeout(time.Minute), // Total wait timeout
waiter.WithInterval(2 * time.Second), // Time between retry attempts
waiter.WithBackoffPolicy("exponential"), // Use exponential backoff
waiter.WithBackoffCoefficient(2.0), // Double the wait time each retry
waiter.WithBackoffExponentialMaxInterval(10 * time.Second), // Max 10s between retries
}
// Wait for the TCP port to be available
fmt.Println("Waiting for Redis to be available on port 6379...")
err := waiter.WaitContext(ctx, tcpChecker, options...)
if err != nil {
log.Fatalf("Failed waiting for Redis: %v", err)
}
fmt.Println("Redis is available!")
}
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