Don't reuse failed connections

If MySQL API returns an error indicating the connection is no longer
usable, mark it as failed. In connection_pool_factory free failed
connections instead of returning them to the pool.

1 files changed, 14 insertions, 0 deletions

diff --git a/odb/mysql/connection.hxx b/odb/mysql/connection.hxx
index 0310ee6..6704f23 100644
--- a/odb/mysql/connection.hxx
+++ b/odb/mysql/connection.hxx
@@ -46,6 +46,19 @@ namespace odb
       }
 
     public:
+      bool
+      failed () const
+      {
+        return failed_;
+      }
+
+      void
+      mark_failed ()
+      {
+        failed_ = true;
+      }
+
+    public:
       MYSQL*
       handle ()
       {
@@ -91,6 +104,7 @@ namespace odb
 
     private:
       database_type& db_;
+      bool failed_;
 
       MYSQL mysql_;
       MYSQL* handle_;