1 files changed, 244 insertions, 0 deletions
diff --git a/pkg/worker/sync_worker.go b/pkg/worker/sync_worker.go
new file mode 100755
index 00000000..1a0393fb
--- /dev/null
+++ b/pkg/worker/sync_worker.go
@@ -0,0 +1,244 @@
+package worker
+
+import (
+	"bytes"
+	"context"
+	"time"
+
+	"github.com/spiral/errors"
+	"github.com/spiral/goridge/v3/interfaces/relay"
+	"github.com/spiral/goridge/v3/pkg/frame"
+	"github.com/spiral/roadrunner/v2/internal"
+	"github.com/spiral/roadrunner/v2/pkg/payload"
+	"go.uber.org/multierr"
+)
+
+// Allocator is responsible for worker allocation in the pool
+type Allocator func() (*SyncWorkerImpl, error)
+
+type SyncWorkerImpl struct {
+	process *Process
+}
+
+// From creates SyncWorker from BaseProcess
+func From(process *Process) *SyncWorkerImpl {
+	return &SyncWorkerImpl{
+		process: process,
+	}
+}
+
+// FromSync creates BaseProcess from SyncWorkerImpl
+func FromSync(w *SyncWorkerImpl) BaseProcess {
+	return &Process{
+		created:  w.process.created,
+		events:   w.process.events,
+		state:    w.process.state,
+		cmd:      w.process.cmd,
+		pid:      w.process.pid,
+		stderr:   w.process.stderr,
+		endState: w.process.endState,
+		relay:    w.process.relay,
+		rd:       w.process.rd,
+	}
+}
+
+// Exec payload without TTL timeout.
+func (tw *SyncWorkerImpl) Exec(p payload.Payload) (payload.Payload, error) {
+	const op = errors.Op("sync_worker_exec")
+	if len(p.Body) == 0 && len(p.Context) == 0 {
+		return payload.Payload{}, errors.E(op, errors.Str("payload can not be empty"))
+	}
+
+	if tw.process.State().Value() != internal.StateReady {
+		return payload.Payload{}, errors.E(op, errors.Errorf("Process is not ready (%s)", tw.process.State().String()))
+	}
+
+	// set last used time
+	tw.process.State().SetLastUsed(uint64(time.Now().UnixNano()))
+	tw.process.State().Set(internal.StateWorking)
+
+	rsp, err := tw.execPayload(p)
+	if err != nil {
+		// just to be more verbose
+		if errors.Is(errors.SoftJob, err) == false {
+			tw.process.State().Set(internal.StateErrored)
+			tw.process.State().RegisterExec()
+		}
+		return payload.Payload{}, err
+	}
+
+	tw.process.State().Set(internal.StateReady)
+	tw.process.State().RegisterExec()
+
+	return rsp, nil
+}
+
+type wexec struct {
+	payload payload.Payload
+	err     error
+}
+
+// Exec payload without TTL timeout.
+func (tw *SyncWorkerImpl) ExecWithTimeout(ctx context.Context, p payload.Payload) (payload.Payload, error) {
+	const op = errors.Op("sync_worker_exec_worker_with_timeout")
+	c := make(chan wexec, 1)
+
+	go func() {
+		if len(p.Body) == 0 && len(p.Context) == 0 {
+			c <- wexec{
+				payload: payload.Payload{},
+				err:     errors.E(op, errors.Str("payload can not be empty")),
+			}
+			return
+		}
+
+		if tw.process.State().Value() != internal.StateReady {
+			c <- wexec{
+				payload: payload.Payload{},
+				err:     errors.E(op, errors.Errorf("Process is not ready (%s)", tw.process.State().String())),
+			}
+			return
+		}
+
+		// set last used time
+		tw.process.State().SetLastUsed(uint64(time.Now().UnixNano()))
+		tw.process.State().Set(internal.StateWorking)
+
+		rsp, err := tw.execPayload(p)
+		if err != nil {
+			// just to be more verbose
+			if errors.Is(errors.SoftJob, err) == false {
+				tw.process.State().Set(internal.StateErrored)
+				tw.process.State().RegisterExec()
+			}
+			c <- wexec{
+				payload: payload.Payload{},
+				err:     errors.E(op, err),
+			}
+			return
+		}
+
+		tw.process.State().Set(internal.StateReady)
+		tw.process.State().RegisterExec()
+
+		c <- wexec{
+			payload: rsp,
+			err:     nil,
+		}
+	}()
+
+	select {
+	// exec TTL reached
+	case <-ctx.Done():
+		err := multierr.Combine(tw.Kill())
+		if err != nil {
+			// append timeout error
+			err = multierr.Append(err, errors.E(op, errors.ExecTTL))
+			return payload.Payload{}, multierr.Append(err, ctx.Err())
+		}
+		return payload.Payload{}, errors.E(op, errors.ExecTTL, ctx.Err())
+	case res := <-c:
+		if res.err != nil {
+			return payload.Payload{}, res.err
+		}
+		return res.payload, nil
+	}
+}
+
+func (tw *SyncWorkerImpl) execPayload(p payload.Payload) (payload.Payload, error) {
+	const op = errors.Op("sync_worker_exec_payload")
+
+	fr := frame.NewFrame()
+	fr.WriteVersion(frame.VERSION_1)
+	// can be 0 here
+
+	buf := new(bytes.Buffer)
+	buf.Write(p.Context)
+	buf.Write(p.Body)
+
+	// Context offset
+	fr.WriteOptions(uint32(len(p.Context)))
+	fr.WritePayloadLen(uint32(buf.Len()))
+	fr.WritePayload(buf.Bytes())
+
+	fr.WriteCRC()
+
+	// empty and free the buffer
+	buf.Truncate(0)
+
+	err := tw.Relay().Send(fr)
+	if err != nil {
+		return payload.Payload{}, err
+	}
+
+	frameR := frame.NewFrame()
+
+	err = tw.process.Relay().Receive(frameR)
+	if err != nil {
+		return payload.Payload{}, errors.E(op, err)
+	}
+	if frameR == nil {
+		return payload.Payload{}, errors.E(op, errors.Str("nil fr received"))
+	}
+
+	if !frameR.VerifyCRC() {
+		return payload.Payload{}, errors.E(op, errors.Str("failed to verify CRC"))
+	}
+
+	flags := frameR.ReadFlags()
+
+	if flags&byte(frame.ERROR) != byte(0) {
+		return payload.Payload{}, errors.E(op, errors.SoftJob, errors.Str(string(frameR.Payload())))
+	}
+
+	options := frameR.ReadOptions()
+	if len(options) != 1 {
+		return payload.Payload{}, errors.E(op, errors.Str("options length should be equal 1 (body offset)"))
+	}
+
+	pl := payload.Payload{}
+	pl.Context = frameR.Payload()[:options[0]]
+	pl.Body = frameR.Payload()[options[0]:]
+
+	return pl, nil
+}
+
+func (tw *SyncWorkerImpl) String() string {
+	return tw.process.String()
+}
+
+func (tw *SyncWorkerImpl) Pid() int64 {
+	return tw.process.Pid()
+}
+
+func (tw *SyncWorkerImpl) Created() time.Time {
+	return tw.process.Created()
+}
+
+func (tw *SyncWorkerImpl) State() internal.State {
+	return tw.process.State()
+}
+
+func (tw *SyncWorkerImpl) Start() error {
+	return tw.process.Start()
+}
+
+func (tw *SyncWorkerImpl) Wait() error {
+	return tw.process.Wait()
+}
+
+func (tw *SyncWorkerImpl) Stop() error {
+	return tw.process.Stop()
+}
+
+func (tw *SyncWorkerImpl) Kill() error {
+	return tw.process.Kill()
+}
+
+func (tw *SyncWorkerImpl) Relay() relay.Relay {
+	return tw.process.Relay()
+}
+
+func (tw *SyncWorkerImpl) AttachRelay(rl relay.Relay) {
+	tw.process.AttachRelay(rl)
+}