1 files changed, 30 insertions, 0 deletions
diff --git a/internal/source/source.go b/internal/source/source.go
new file mode 100644
index 0000000..4bb0784
--- /dev/null
+++ b/internal/source/source.go
@@ -0,0 +1,30 @@
+package source
+
+// Source specifies the origin of either the current process (dtail is a client
+// process, dserver is a server process) or the source code package (e.g.
+// dserver server side code or dtail client side code). Notice that dtail client
+// may also executes server code directly (e.g. via serverless mode) and that
+// the dserver may also executes client code (e.g. via scheduled server side
+// mapreduce queries).
+type Source int
+
+const (
+	// Client process or source code package.
+	Client Source = iota
+	// Server process or source code package.
+	Server Source = iota
+	// HealthCheck process or client source code package.
+	HealthCheck Source = iota
+)
+
+func (s Source) String() string {
+	switch s {
+	case Client:
+		return "CLIENT"
+	case Server:
+		return "SERVER"
+	case HealthCheck:
+		return "HEALTHCHECK"
+	}
+	panic("Unknown source type")
+}