Function BuildRunAndConnect

core/java/jdwp/test/test.go:97–133

BuildRunAndConnect builds all the source files with javac, executes them with java, attaches to it via JDWP, then calls onConnect with the connection.

(ctx context.Context, source JavaSource, onConnect func(ctx context.Context, conn *jdwp.Connection) int)

// BuildRunAndConnect builds all the source files with javac, executes them with
// java, attaches to it via JDWP, then calls onConnect with the connection.
func BuildRunAndConnect(ctx context.Context, source JavaSource, onConnect func(ctx context.Context, conn *jdwp.Connection) int) int {
	ctx, stop := task.WithTimeout(ctx, time.Second*30)

	port, err := findFreePort()
	if err != nil {
		log.E(ctx, "Failed to find a free port. Error: %v", err)
		return -1
	}

	done := runJavaServer(ctx, source, port)
	defer func() {
		stop()
		<-done
	}()

	var socket io.ReadWriteCloser
	for i := 0; i < 5; i++ {
		var err error
		if socket, err = net.Dial("tcp", fmt.Sprintf("localhost:%v", port)); err == nil {
			break
		}
		time.Sleep(time.Second)
	}

	if socket == nil {
		log.E(ctx, "Failed to connect to the socket. Error: %v", err)
		return -1
	}

	conn, err := jdwp.Open(ctx, socket)
	if err != nil {
		log.E(ctx, "Failed to open the JDWP connection. Error: %v", err)
		return -1
	}

	return onConnect(ctx, conn)
}