1 files changed, 164 insertions, 0 deletions
diff --git a/pkg/pipe/pipe_factory.go b/pkg/pipe/pipe_factory.go
new file mode 100755
index 00000000..c86d78c4
--- /dev/null
+++ b/pkg/pipe/pipe_factory.go
@@ -0,0 +1,164 @@
+package pipe
+
+import (
+	"context"
+	"os/exec"
+
+	"github.com/spiral/errors"
+	"github.com/spiral/goridge/v3"
+	"github.com/spiral/roadrunner/v2/interfaces/worker"
+	"github.com/spiral/roadrunner/v2/internal"
+	workerImpl "github.com/spiral/roadrunner/v2/pkg/worker"
+	"go.uber.org/multierr"
+)
+
+// Factory connects to stack using standard
+// streams (STDIN, STDOUT pipes).
+type Factory struct{}
+
+// NewPipeFactory returns new factory instance and starts
+// listening
+
+// todo: review tests
+func NewPipeFactory() worker.Factory {
+	return &Factory{}
+}
+
+type SpawnResult struct {
+	w   worker.BaseProcess
+	err error
+}
+
+// SpawnWorker creates new Process and connects it to goridge relay,
+// method Wait() must be handled on level above.
+func (f *Factory) SpawnWorkerWithContext(ctx context.Context, cmd *exec.Cmd) (worker.BaseProcess, error) {
+	c := make(chan SpawnResult)
+	const op = errors.Op("spawn worker with context")
+	go func() {
+		w, err := workerImpl.InitBaseWorker(cmd)
+		if err != nil {
+			c <- SpawnResult{
+				w:   nil,
+				err: errors.E(op, err),
+			}
+			return
+		}
+
+		// TODO why out is in?
+		in, err := cmd.StdoutPipe()
+		if err != nil {
+			c <- SpawnResult{
+				w:   nil,
+				err: errors.E(op, err),
+			}
+			return
+		}
+
+		// TODO why in is out?
+		out, err := cmd.StdinPipe()
+		if err != nil {
+			c <- SpawnResult{
+				w:   nil,
+				err: errors.E(op, err),
+			}
+			return
+		}
+
+		// Init new PIPE relay
+		relay := goridge.NewPipeRelay(in, out)
+		w.AttachRelay(relay)
+
+		// Start the worker
+		err = w.Start()
+		if err != nil {
+			c <- SpawnResult{
+				w:   nil,
+				err: errors.E(op, err),
+			}
+			return
+		}
+
+		// errors bundle
+		pid, err := internal.FetchPID(relay)
+		if pid != w.Pid() || err != nil {
+			err = multierr.Combine(
+				err,
+				w.Kill(),
+				w.Wait(),
+			)
+			c <- SpawnResult{
+				w:   nil,
+				err: errors.E(op, err),
+			}
+			return
+		}
+
+		// everything ok, set ready state
+		w.State().Set(internal.StateReady)
+
+		// return worker
+		c <- SpawnResult{
+			w:   w,
+			err: nil,
+		}
+	}()
+
+	select {
+	case <-ctx.Done():
+		return nil, ctx.Err()
+	case res := <-c:
+		if res.err != nil {
+			return nil, res.err
+		}
+		return res.w, nil
+	}
+}
+
+func (f *Factory) SpawnWorker(cmd *exec.Cmd) (worker.BaseProcess, error) {
+	const op = errors.Op("spawn worker")
+	w, err := workerImpl.InitBaseWorker(cmd)
+	if err != nil {
+		return nil, errors.E(op, err)
+	}
+
+	// TODO why out is in?
+	in, err := cmd.StdoutPipe()
+	if err != nil {
+		return nil, errors.E(op, err)
+	}
+
+	// TODO why in is out?
+	out, err := cmd.StdinPipe()
+	if err != nil {
+		return nil, errors.E(op, err)
+	}
+
+	// Init new PIPE relay
+	relay := goridge.NewPipeRelay(in, out)
+	w.AttachRelay(relay)
+
+	// Start the worker
+	err = w.Start()
+	if err != nil {
+		return nil, errors.E(op, err)
+	}
+
+	// errors bundle
+	if pid, err := internal.FetchPID(relay); pid != w.Pid() {
+		err = multierr.Combine(
+			err,
+			w.Kill(),
+			w.Wait(),
+		)
+		return nil, errors.E(op, err)
+	}
+
+	// everything ok, set ready state
+	w.State().Set(internal.StateReady)
+	return w, nil
+}
+
+// Close the factory.
+func (f *Factory) Close(ctx context.Context) error {
+	return nil
+}