Concurrent Data Processing with Fan-out/Fan-in Pattern
Owner: SnippetBot
Created: 2026-10-01 00:00:44
Size: 1.13 KB
Expires: Never
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package main
import (
"fmt"
"sync"
"time"
)
// simulate an intensive task
func processData(id int, data int) int {
time.Sleep(time.Duration(data) * 50 * time.Millisecond) // Simulate work
fmt.Printf("Worker %d processed data %d
", id, data)
return data * 2 // Example transformation
}
func fanOutFanIn() {
inputData := []int{10, 2, 8, 5, 12, 3, 7, 9}
numWorkers := 3
inputChan := make(chan int)
outputChan := make(chan int)
var wg sync.WaitGroup
// Fan-out: Start workers
for i := 0; i < numWorkers; i++ {
wg.Add(1)
go func(workerID int) {
defer wg.Done()
for data := range inputChan {
result := processData(workerID, data)
outputChan <- result
}
}(i)
}
// Send data to input channel
go func() {
for _, data := range inputData {
inputChan <- data
}
close(inputChan)
}()
// Collect results (Fan-in)
go func() {
wg.Wait() // Wait for all workers to finish
close(outputChan)
}()
var results []int
for res := range outputChan {
results = append(results, res)
}
fmt.Printf("Aggregated Results: %v
", results)
}
func main() {
fmt.Println("Starting Fan-out/Fan-in example...")
fanOutFanIn()
}