1 files changed, 16 insertions, 2 deletions
diff --git a/server/src/session.h b/server/src/session.h
index a4d93f4..12c831a 100644
--- a/server/src/session.h
+++ b/server/src/session.h
@@ -31,6 +31,8 @@
 #include <string>
 #include <map>
 
+#include "mutex.h"
+
 class JournalWriter;
 
 class Session {
@@ -38,10 +40,18 @@ public:
   Session(std::string sessionid);
 
   std::string id();
+  
+  void lock();
+  void unlock();
+
+  void commit();
+
+  JournalWriter *journal();
 
 private:
-  JournalWriter *journal;
+  JournalWriter *_journal;
   std::string _id;
+  Mutex mutex;
 };
 
 class Sessions {
@@ -71,9 +81,13 @@ public:
    */
   void deleteSession(std::string sessionid);
 
+  /**
+   * Return number of active sessions.
+   */
+  size_t size();
+
 private:
   std::map<std::string, Session *> sessions;
-
 };