Refactor commands.

command/command.go

@@ -0,0 +1,19 @@
+package command
+
+import (
+	"github.com/coreos/go-raft"
+)
+
+// A command represents an action to be taken on the replicated state machine.
+type Command interface {
+	CommandName() string
+	Apply(server *raft.Server) (interface{}, error)
+}
+
+// Registers commands to the Raft library.
+func Register() {
+	raft.RegisterCommand(&DeleteCommand{})
+	raft.RegisterCommand(&TestAndSetCommand{})
+	raft.RegisterCommand(&CreateCommand{})
+	raft.RegisterCommand(&UpdateCommand{})
+}