From d304a4b2b19dca115954f209d6a37a6958e73ab9 Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Fri, 18 Jan 2013 10:23:39 +0200
Subject: Add support for post-commit/rollback callbacks

New test: common/transaction/callback.
---
 common/transaction/callback/driver.cxx | 212 +++++++++++++++++++++++++++++++++
 1 file changed, 212 insertions(+)
 create mode 100644 common/transaction/callback/driver.cxx

(limited to 'common/transaction/callback/driver.cxx')

diff --git a/common/transaction/callback/driver.cxx b/common/transaction/callback/driver.cxx
new file mode 100644
index 0000000..b74df4c
--- /dev/null
+++ b/common/transaction/callback/driver.cxx
@@ -0,0 +1,212 @@
+// file      : common/transaction/callback/driver.cxx
+// copyright : Copyright (c) 2009-2012 Code Synthesis Tools CC
+// license   : GNU GPL v2; see accompanying LICENSE file
+
+// Test transaction callbacks.
+//
+
+#include <cstddef> // std::size_t
+#include <cassert>
+#include <iostream>
+
+#include <odb/database.hxx>
+#include <odb/transaction.hxx>
+
+#include <common/common.hxx>
+
+using namespace std;
+using namespace odb::core;
+
+struct callback
+{
+  callback (unsigned short v): v_ (v), t_ (0) {}
+  callback (unsigned short v, transaction& t): v_ (v), t_ (0) {register_ (t);}
+  ~callback () {if (t_ != 0) unregister ();}
+
+  void
+  register_ (transaction& t)
+  {
+    t_ = &t;
+    t.register_ (&func, this, transaction::event_all, v_, &t_);
+  }
+
+  void
+  unregister ()
+  {
+    cout << "  unregister callback " << v_ << endl;
+    t_->unregister (this);
+    t_ = 0;
+  }
+
+private:
+  static void
+  func (unsigned short event, void* key, unsigned long long data)
+  {
+    callback& c (*static_cast<callback*> (key));
+
+    const char* en;
+    switch (event)
+    {
+    case transaction::event_commit:
+      en = "commit";
+      break;
+    case transaction::event_rollback:
+      en = "rollback";
+      break;
+    default:
+      en = "unknown";
+    }
+
+    cout << "  callback " << c.v_ << " " << en << endl;
+
+    assert (data == c.v_);
+    assert (c.t_ == 0);
+  }
+
+  unsigned short v_;
+  transaction* t_;
+};
+
+struct failed {};
+
+static void
+throw_func (unsigned short, void*, unsigned long long)
+{
+  throw failed ();
+}
+
+static void
+dummy_func (unsigned short, void* key, unsigned long long data)
+{
+  assert (reinterpret_cast<unsigned long long> (key) == data);
+}
+
+static void
+fill (transaction& t)
+{
+  // 20 is from odb/transaction.hxx.
+  //
+  for (size_t i (0); i < 20; ++i)
+    t.register_ (&dummy_func,
+                 reinterpret_cast<void*> (i),
+                 transaction::event_all,
+                 i);
+}
+
+int
+main (int argc, char* argv[])
+{
+  try
+  {
+    auto_ptr<database> db (create_database (argc, argv, false));
+
+    // We want to test both stack and dynamic slots.
+    //
+    for (unsigned short i (1); i < 3; ++i)
+    {
+      // Test basic logic.
+      //
+      cout << "test " << i << "/001" << endl;
+
+      // Commit callback.
+      //
+      {
+        transaction t (db->begin ());
+        if (i == 2) fill (t);
+        callback c1 (1, t);
+        t.commit ();
+      }
+
+      // Rollback callback.
+      //
+      {
+        transaction t (db->begin ());
+        if (i == 2) fill (t);
+        callback c1 (1, t);
+        t.rollback ();
+      }
+
+      // Rollback via exception callback.
+      //
+      {
+        callback c1 (1);
+
+        try
+        {
+          transaction t (db->begin ());
+          if (i == 2) fill (t);
+          c1.register_ (t);
+          throw failed ();
+        }
+        catch (const failed&)
+        {
+        }
+      }
+
+      // Unregister callback at the end.
+      //
+      {
+        transaction t (db->begin ());
+        if (i == 2) fill (t);
+        callback c1 (1, t);
+        c1.unregister ();
+        t.unregister (&c1); // Test unregistering non-registered key.
+        t.commit ();
+      }
+
+      {
+        transaction t (db->begin ());
+        if (i == 2) fill (t);
+        callback c1 (1, t);
+        c1.unregister ();
+        callback c2 (2, t);
+        t.commit ();
+      }
+
+      // Unregister callback in the middle.
+      //
+      cout << "test " << i << "/002" << endl;
+      {
+        transaction t (db->begin ());
+        if (i == 2) fill (t);
+        callback c1 (1, t);
+        callback c2 (2, t);
+        callback c3 (3, t);
+        c2.unregister ();
+        t.commit ();
+      }
+
+      {
+        transaction t (db->begin ());
+        if (i == 2) fill (t);
+        callback c1 (1, t);
+        callback c2 (2, t);
+        callback c3 (3, t);
+        c2.unregister ();
+        callback c4 (4, t); // Using the free slot.
+        t.commit ();
+      }
+
+      // Test a callback in the middle that throws.
+      //
+      cout << "test " << i << "/003" << endl;
+      try
+      {
+        transaction t (db->begin ());
+        if (i == 2) fill (t);
+        callback c1 (1, t);
+        t.register_ (&throw_func, 0);
+        callback c2 (2, t);
+        t.commit ();
+      }
+      catch (const failed&)
+      {
+      }
+    }
+  }
+  catch (const odb::exception& e)
+  {
+    cerr << e.what () << endl;
+    return 1;
+  }
+}
-- 
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