Pool context option & stop with timeout

examples/pool_context/go.mod

@@ -0,0 +1,7 @@
+module github.com/alitto/pond/examples/pool_context
+
+go 1.17
+
+require github.com/alitto/pond v1.6.1
+
+replace github.com/alitto/pond => ../../

examples/pool_context/pool_context.go

@@ -0,0 +1,35 @@
+package main
+
+import (
+	"context"
+	"fmt"
+	"os"
+	"os/signal"
+	"time"
+
+	"github.com/alitto/pond"
+)
+
+// Pressing Ctrl+C while this program is running will cause the program to terminate gracefully.
+// Tasks being processed will continue until they finish, but queued tasks are cancelled.
+func main() {
+
+	// Create a context that will be cancelled when the user presses Ctrl+C (process receives termination signal).
+	ctx, stop := signal.NotifyContext(context.Background(), os.Interrupt)
+	defer stop()
+
+	// Create a pool and pass the context to it.
+	pool := pond.New(1, 1000, pond.Context(ctx))
+	defer pool.StopAndWait()
+
+	// Submit several long runnning tasks
+	var count int = 100
+	for i := 0; i < count; i++ {
+		n := i
+		pool.Submit(func() {
+			fmt.Printf("Task #%d started\n", n)
+			time.Sleep(1 * time.Second)
+			fmt.Printf("Task #%d finished\n", n)
+		})
+	}
+}