1 files changed, 18 insertions, 0 deletions
diff --git a/pkg/workflowpattern/trace_writer.go b/pkg/workflowpattern/trace_writer.go
new file mode 100644
index 0000000..d5d990f
--- /dev/null
+++ b/pkg/workflowpattern/trace_writer.go
@@ -0,0 +1,18 @@
+package workflowpattern
+
+import "fmt"
+
+type TraceWriter interface {
+	Info(string, ...interface{})
+}
+
+type EmptyTraceWriter struct{}
+
+func (*EmptyTraceWriter) Info(string, ...interface{}) {
+}
+
+type StdOutTraceWriter struct{}
+
+func (*StdOutTraceWriter) Info(format string, args ...interface{}) {
+	fmt.Printf(format+"\n", args...)
+}