From 2a0f39b29c1bea6a4497c0f1826052ffa453af9e Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Thu, 21 Apr 2016 16:05:13 +0200
Subject: Move module implementation from brep/ to mod/

---
 mod/database-module | 55 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 55 insertions(+)
 create mode 100644 mod/database-module

(limited to 'mod/database-module')

diff --git a/mod/database-module b/mod/database-module
new file mode 100644
index 0000000..0933794
--- /dev/null
+++ b/mod/database-module
@@ -0,0 +1,55 @@
+// file      : mod/database-module -*- C++ -*-
+// copyright : Copyright (c) 2014-2016 Code Synthesis Ltd
+// license   : MIT; see accompanying LICENSE file
+
+#ifndef MOD_DATABASE_MODULE
+#define MOD_DATABASE_MODULE
+
+#include <odb/forward.hxx> // database
+
+#include <brep/types>
+#include <brep/utility>
+
+#include <mod/module>
+#include <mod/options>
+
+namespace brep
+{
+  // A module that utilises the database. Specifically, it will retry the
+  // request in the face of recoverable database failures (deadlock, loss of
+  // connection, etc) up to a certain number of times.
+  //
+  class database_module: public module
+  {
+  protected:
+    database_module () = default;
+
+    // Create a shallow copy (handling instance) if initialized and a deep
+    // copy (context exemplar) otherwise.
+    //
+    explicit
+    database_module (const database_module&);
+
+    // Required to avoid getting warning from clang that
+    // database_module::init() hides module::init() virtual functions. This
+    // way all functions get to the same scope and become overloaded set.
+    //
+    using module::init;
+
+    void
+    init (const options::db&);
+
+    virtual bool
+    handle (request&, response&) = 0;
+
+  protected:
+    size_t retry_;
+    shared_ptr<odb::core::database> db_;
+
+  private:
+    virtual bool
+    handle (request&, response&, log&);
+  };
+}
+
+#endif // MOD_DATABASE_MODULE
-- 
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