From 4583e43120ddcfc63108b01e644b88e7f546be53 Mon Sep 17 00:00:00 2001
From: Sage Weil <sage@redhat.com>
Date: Thu, 11 Jan 2018 09:42:55 -0600
Subject: [PATCH] common/config_obs: NoopConfigObserver

Signed-off-by: Sage Weil <sage@redhat.com>
---
 src/common/config_obs.h | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)

diff --git a/src/common/config_obs.h b/src/common/config_obs.h
index 723f7391ea5..ddc7823ac5d 100644
--- a/src/common/config_obs.h
+++ b/src/common/config_obs.h
@@ -17,6 +17,7 @@
 
 #include <set>
 #include <string>
+#include <list>
 
 struct md_config_t;
 
@@ -42,4 +43,29 @@ public:
 				    const std::set<int>& changed) { }
 };
 
+class NoopConfigObserver : public md_config_obs_t {
+  std::list<std::string> options;
+  const char **ptrs = 0;
+
+public:
+  NoopConfigObserver(std::list<std::string> l) : options(l) {
+    ptrs = new const char*[options.size() + 1];
+    unsigned j = 0;
+    for (auto& i : options) {
+      ptrs[j++] = i.c_str();
+    }
+    ptrs[j] = 0;
+  }
+  ~NoopConfigObserver() {
+    delete[] ptrs;
+  }
+
+  const char** get_tracked_conf_keys() const override {
+    return ptrs;
+  }
+  void handle_conf_change(const struct md_config_t *conf,
+			  const std::set <std::string> &changed) override {
+  }
+};
+
 #endif
-- 
2.39.5