JsonDb::Transaction::Transaction(std::string const &filename, ValuePointer const &_null_element)
{
/* The null element */
null_element = _null_element;
/* open the database */
db = StorageDbPointer(vlopen(filename.c_str(), VL_OWRITER | VL_OCREAT, VL_CMPINT), CloseDatabase);
/* Start the transaction */
vltranbegin(db.get());
if(db.get() == NULL)
throw std::runtime_error((boost::format("Failed to open database: %s") % dperrmsg(dpecode)).str().c_str());
ValuePointer root = Retrieve(root_key);
if(root.get() == NULL)
{
root = ValuePointer(new ValueObject(root_key));
Store(root->GetKey(), root);
}
ValuePointer next_id_value = Retrieve(next_id_key);
if(next_id_value.get() == NULL)
{
// Initialize values
next_id = initial_next_id;
start_next_id = next_id;
} else
{
// Retrieve values from database
next_id = next_id_value->GetValueInt();
start_next_id = next_id;
}
// std::cout << "Start transaction, next id: " << next_id << std::endl;
}
int main(void)
{
VILLA *villa;
int size;
char *s;
printf("compareFunc(\"a\", \"b\") = %i\n", compareFunc("a", 1, "b", 1));
printf("compareFunc(\"b\", \"a\") = %i\n", compareFunc("b", 1, "a", 1));
printf("compareFunc(\"a\", \"a\") = %i\n", compareFunc("a", 1, "a", 1));
printf("compareFunc(\"b\", \"b\") = %i\n", compareFunc("b", 1, "b", 1));
remove("test.qdbm");
if(!(villa = vlopen("test.qdbm", VL_OWRITER | VL_OCREAT, compareFunc)))
{
printf("vlopen failed %s\n", dperrmsg(dpecode));
return 1;
}
if(!vltranbegin(villa))
{
printf("vltranbegin failed %s\n", dperrmsg(dpecode));
return 1;
}
if(!vlput(villa, "a", 1, "1", 1, DP_DOVER))
{
printf("vlput failed %s\n", dperrmsg(dpecode));
return 1;
}
if(!vlput(villa, "b", 1, "2", 1, DP_DOVER))
{
printf("vlput failed %s\n", dperrmsg(dpecode));
return 1;
}
if(!vltrancommit(villa))
{
printf("vltrancommit failed %s\n", dperrmsg(dpecode));
return 1;
}
if(!vlclose(villa))
{
printf("vlclose failed %s\n", dperrmsg(dpecode));
return 1;
}
if(!(villa = vlopen("test.qdbm", VL_OWRITER | VL_OCREAT, compareFunc)))
{
printf("vlopen failed %s\n", dperrmsg(dpecode));
return 1;
}
s = vlget(villa, "a", 1, &size);
printf("a = '%s'\n", s ? s : "NULL");
s = vlget(villa, "b", 1, &size);
printf("b = '%s'\n", s ? s : "NULL");
if(!vlclose(villa))
{
printf("vlclose failed %s\n", dperrmsg(dpecode));
return 1;
}
return 0;
}