public void TransactionShouldSupportCustomComparer()
{
Func <int, int, int> comparison = (l, r) => - Math.Sign(l - r);
var txn = _env.BeginTransaction();
var options = new DatabaseConfiguration {
Flags = DatabaseOpenFlags.Create
};
Func <byte[], byte[], int> compareWith = (l, r) => comparison(BitConverter.ToInt32(l, 0), BitConverter.ToInt32(r, 0));
options.CompareWith(Comparer <byte[]> .Create(new Comparison <byte[]>(compareWith)));
var db = txn.OpenDatabase(configuration: options);
var keysUnsorted = new [] { 2, 10, 5 };
var keysSorted = keysUnsorted.ToArray();
Array.Sort(keysSorted, new Comparison <int>(comparison));
for (var i = 0; i < keysUnsorted.Length; i++)
{
txn.Put(db, BitConverter.GetBytes(keysUnsorted[i]), BitConverter.GetBytes(i));
}
using (var c = txn.CreateCursor(db))
{
int order = 0;
while (c.MoveNext())
{
Assert.Equal(keysSorted[order++], BitConverter.ToInt32(c.Current.Key, 0));
}
}
}
public void TransactionShouldSupportCustomComparer()
{
Func <int, int, int> comparison = (l, r) => l.CompareTo(r);
var options = new DatabaseConfiguration {
Flags = DatabaseOpenFlags.Create
};
Func <MDBValue, MDBValue, int> compareWith =
(l, r) => comparison(BitConverter.ToInt32(l.CopyToNewArray(), 0), BitConverter.ToInt32(r.CopyToNewArray(), 0));
options.CompareWith(Comparer <MDBValue> .Create(new Comparison <MDBValue>(compareWith)));
using (var txnT = _env.BeginTransaction())
using (var db1 = txnT.OpenDatabase(configuration: options))
{
txnT.DropDatabase(db1);
txnT.Commit();
}
var txn = _env.BeginTransaction();
var db = txn.OpenDatabase(configuration: options);
var keysUnsorted = Enumerable.Range(1, 10000).OrderBy(x => Guid.NewGuid()).ToList();
var keysSorted = keysUnsorted.ToArray();
Array.Sort(keysSorted, new Comparison <int>(comparison));
GC.Collect();
for (var i = 0; i < keysUnsorted.Count; i++)
{
txn.Put(db, BitConverter.GetBytes(keysUnsorted[i]), BitConverter.GetBytes(i));
}
using (var c = txn.CreateCursor(db))
{
int order = 0;
while (c.Next() == MDBResultCode.Success)
{
Assert.Equal(keysSorted[order++], BitConverter.ToInt32(c.GetCurrent().key.CopyToNewArray(), 0));
}
}
}
public void TransactionShouldSupportCustomComparer()
{
Func<int, int, int> comparison = (l, r) => -Math.Sign(l - r);
var txn = _env.BeginTransaction();
var options = new DatabaseConfiguration {Flags = DatabaseOpenFlags.Create};
Func<byte[], byte[], int> compareWith = (l, r) => comparison(BitConverter.ToInt32(l, 0), BitConverter.ToInt32(r, 0));
options.CompareWith(Comparer<byte[]>.Create(new Comparison<byte[]>(compareWith)));
var db = txn.OpenDatabase(configuration: options);
var keysUnsorted = new [] { 2, 10, 5 };
var keysSorted = keysUnsorted.ToArray();
Array.Sort(keysSorted, new Comparison<int>(comparison));
for (var i = 0; i < keysUnsorted.Length; i++)
txn.Put(db, BitConverter.GetBytes(keysUnsorted[i]), BitConverter.GetBytes(i));
using (var c = txn.CreateCursor(db))
{
int order = 0;
while (c.MoveNext())
Assert.Equal(keysSorted[order++], BitConverter.ToInt32(c.Current.Key, 0));
}
}
public void TransactionShouldSupportCustomComparer()
{
Func<int, int, int> comparison = (l, r) => l.CompareTo(r);
var options = new DatabaseConfiguration {Flags = DatabaseOpenFlags.Create};
Func<byte[], byte[], int> compareWith =
(l, r) => comparison(BitConverter.ToInt32(l, 0), BitConverter.ToInt32(r, 0));
options.CompareWith(Comparer<byte[]>.Create(new Comparison<byte[]>(compareWith)));
using (var txnT = _env.BeginTransaction())
using (var db1 = txnT.OpenDatabase(configuration: options))
{
txnT.DropDatabase(db1);
txnT.Commit();
}
var txn = _env.BeginTransaction();
var db = txn.OpenDatabase(configuration: options);
var keysUnsorted = Enumerable.Range(1, 10000).OrderBy(x => Guid.NewGuid()).ToList();
var keysSorted = keysUnsorted.ToArray();
Array.Sort(keysSorted, new Comparison<int>(comparison));
GC.Collect();
for (var i = 0; i < keysUnsorted.Count; i++)
txn.Put(db, BitConverter.GetBytes(keysUnsorted[i]), BitConverter.GetBytes(i));
using (var c = txn.CreateCursor(db))
{
int order = 0;
while (c.MoveNext())
Assert.Equal(keysSorted[order++], BitConverter.ToInt32(c.Current.Key, 0));
}
}
