The map::at method does not always exist, so instead use map::find.

[cumulus.git] / localdb.h

diff --git a/localdb.h b/localdb.h
index bdf3b7c..b2a90fd 100644 (file)
--- a/localdb.h
+++ b/localdb.h
@@ -1,7 +1,24 @@
-/* LBS: An LFS-inspired filesystem backup system
- * Copyright (C) 2007  Michael Vrable
+/* Cumulus: Smart Filesystem Backup to Dumb Servers
  *
- * When creating backup snapshots, maintain a local database of data blocks and
+ * Copyright (C) 2007-2008  The Regents of the University of California
+ * Written by Michael Vrable <mvrable@cs.ucsd.edu>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+/* When creating backup snapshots, maintain a local database of data blocks and
  * checksums, in addition to the data contents (which may be stored remotely).
  * This database is consulted when attempting to build incremental snapshots,
  * as it says which objects can be reused.
@@ -21,18 +38,35 @@
 
 class LocalDb {
 public:
-    void Open(const char *path, const char *snapshot_name);
+    void Open(const char *path, const char *snapshot_name,
+              const char *snapshot_scheme, double intent);
     void Close();
     void StoreObject(const ObjectReference& ref,
-                     const std::string &checksum, int64_t size);
+                     const std::string &checksum, int64_t size, double age);
     ObjectReference FindObject(const std::string &checksum, int64_t size);
-    bool IsOldObject(const std::string &checksum, int64_t size);
+    bool IsOldObject(const std::string &checksum, int64_t size, double *age,
+                     int *group);
+    bool IsAvailable(const ObjectReference &ref);
     void UseObject(const ObjectReference& ref);
+    void UseSegment(const std::string &segment, double utilization);
+
+    void SetSegmentChecksum(const std::string &segment, const std::string &path,
+                            const std::string &checksum, int size);
+    bool GetSegmentChecksum(const std::string &segment,
+                            std::string *seg_path, std::string *seg_checksum);
+
+    bool LoadChunkSignatures(ObjectReference ref,
+                             void **buf, size_t *len,
+                             std::string *algorithm);
+    void StoreChunkSignatures(ObjectReference ref,
+                              const void *buf, size_t len,
+                              const std::string &algorithm);
 private:
     sqlite3 *db;
     int64_t snapshotid;
 
     sqlite3_stmt *Prepare(const char *sql);
+    void ReportError(int rc);
     int64_t SegmentToId(const std::string &segment);
     std::string IdToSegment(int64_t segmentid);
 };