some work on cache_restore

caching/restore_emitter.cc

@@ -0,0 +1,61 @@
+#include "caching/restore_emitter.h"
+#include "caching/superblock.h"
+
+using namespace std;
+using namespace caching;
+
+//----------------------------------------------------------------
+
+namespace {
+	using namespace superblock_detail;
+
+	class restorer : public emitter {
+	public:
+		restorer(metadata::ptr md)
+			: md_(md) {
+		}
+
+		virtual void begin_superblock(std::string const &uuid,
+					      pd::block_address block_size,
+					      pd::block_address nr_cache_blocks,
+					      std::string const &policy) {
+		}
+
+		virtual void end_superblock() {
+		}
+
+		virtual void begin_mappings() {
+		}
+
+		virtual void end_mappings() {
+		}
+
+		virtual void mapping(pd::block_address cblock,
+				     pd::block_address oblock,
+				     bool dirty) {
+		}
+
+		virtual void begin_hints() {
+		}
+
+		virtual void end_hints() {
+		}
+
+		virtual void hint(pd::block_address cblock,
+				  std::string const &data) {
+		}
+
+	private:
+		metadata::ptr md_;
+	};
+}
+
+//----------------------------------------------------------------
+
+emitter::ptr
+caching::create_restore_emitter(metadata::ptr md)
+{
+	return emitter::ptr(new restorer(md));
+}
+
+//----------------------------------------------------------------