Continued scaffolding and interface definitions

services/data_service/internal/node/exit/session.go

@@ -1,2 +0,0 @@
-// Package exit
-package exit

services/data_service/internal/node/io.go

@@ -5,10 +5,10 @@ import (
 	"gitlab.michelsen.id/phillmichelsen/tessera/services/data_service/internal/domain"
 )
 
-type In interface {
+type Receiver interface {
 	Receive() (port string, message domain.Message, ok bool)
 }
 
-type Out interface {
+type Sender interface {
 	Send(port string, message domain.Message) error
 }

services/data_service/internal/node/node.go

@@ -0,0 +1,16 @@
+package node
+
+type Type string
+
+const (
+	Source    Type = "source"
+	Processor Type = "processor"
+	Sink      Type = "sink"
+)
+
+type Template struct {
+	Kind    Type
+	Type    string
+	Version string
+	Config  string
+}

services/data_service/internal/node/processor/processor.go

@@ -1,2 +1,18 @@
 // Package processor
 package processor
+
+import (
+	"context"
+
+	"gitlab.michelsen.id/phillmichelsen/tessera/services/data_service/internal/node"
+)
+
+type Processor interface {
+	Start(ctx context.Context, cfg string, io IO) error
+	Stop()
+}
+
+type IO interface {
+	node.Receiver
+	node.Sender
+}

services/data_service/internal/node/processor/registry.go

@@ -0,0 +1,11 @@
+package processor
+
+type Registry struct{}
+
+type Factory interface {
+	New() Processor
+	Type() string
+	Version() string
+
+	TemplateFingerprint(cfg string) (string, error)
+}

services/data_service/internal/node/sink/sink.go

@@ -0,0 +1,17 @@
+// Package sink
+package sink
+
+import (
+	"context"
+
+	"gitlab.michelsen.id/phillmichelsen/tessera/services/data_service/internal/node"
+)
+
+type Sink interface {
+	Start(ctx context.Context, io IO) error
+	Stop()
+}
+
+type IO interface {
+	node.Sender
+}

services/data_service/internal/node/source/registry.go

@@ -0,0 +1 @@
+package source

services/data_service/internal/node/source/source.go

@@ -1,2 +1,20 @@
 // Package source
 package source
+
+import (
+	"context"
+
+	"gitlab.michelsen.id/phillmichelsen/tessera/services/data_service/internal/node"
+)
+
+type Source interface {
+	Start(ctx context.Context, cfg string, io IO) error
+	Stop()
+
+	Serve(key string) error
+	Unserve(key string) error
+}
+
+type IO interface {
+	node.Sender
+}