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// file : common/transaction/callback/driver.cxx
// license : GNU GPL v2; see accompanying LICENSE file
// Test transaction callbacks.
//
#include <memory> // std::unique_ptr
#include <cstddef> // std::size_t
#include <iostream>
#include <odb/database.hxx>
#include <odb/transaction.hxx>
#include <libcommon/common.hxx>
#undef NDEBUG
#include <cassert>
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.callback_register (&func, this, transaction::event_all, v_, &t_);
}
void
unregister ()
{
cout << " unregister callback " << v_ << endl;
t_->callback_unregister (this);
t_ = 0;
}
void
update (unsigned short v)
{
v_ = v;
t_->callback_update (this, transaction::event_all, v_, &t_);
}
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.callback_register (&dummy_func,
reinterpret_cast<void*> (i),
transaction::event_all,
i);
}
int
main (int argc, char* argv[])
{
try
{
unique_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.callback_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.callback_register (&throw_func, 0);
callback c2 (2, t);
t.commit ();
}
catch (const failed&)
{
}
// Test callback_update().
//
{
transaction t (db->begin ());
if (i == 2) fill (t);
callback c (1, t);
c.update (2);
t.commit ();
}
}
}
catch (const odb::exception& e)
{
cerr << e.what () << endl;
return 1;
}
}
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