public void Test3()
{
string path = Path.Combine(Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location), "mdbx2");
if (!Directory.Exists(path))
{
Directory.CreateDirectory(path);
}
using (MdbxEnvironment env = new MdbxEnvironment())
{
EnvironmentFlag flags = EnvironmentFlag.NoTLS |
EnvironmentFlag.NoMetaSync |
EnvironmentFlag.Coalesce |
EnvironmentFlag.LifoReclaim;
env.SetMaxDatabases(20)
.SetMaxReaders(128)
.SetMapSize(10485760 * 10)
.Open(path, flags, Convert.ToInt32("666", 8));
DatabaseOption option = DatabaseOption.Create | DatabaseOption.IntegerKey;
// add some values
using (MdbxTransaction tran = env.BeginTransaction())
{
MdbxDatabase db = tran.OpenDatabase("cursor_test3", option);
for (long i = 0; i < 1000000; i++)
{
db.Put(i, Guid.NewGuid().ToByteArray());
}
tran.Commit();
}
using (MdbxTransaction tran = env.BeginTransaction(TransactionOption.ReadOnly))
{
MdbxDatabase db = tran.OpenDatabase("cursor_test3", option);
using (MdbxCursor cursor = db.OpenCursor())
{
long key = 0;
byte[] value = null;
cursor.Get(ref key, ref value, CursorOp.First);
long index = 0;
Assert.Equal(index, key);
key = 0;
value = null;
while (cursor.Get(ref key, ref value, CursorOp.Next))
{
index++;
Assert.Equal(index, key);
}
}
}
env.Close();
}
}
public void Test2()
{
string path = Path.Combine(Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location), "mdbx");
if (!Directory.Exists(path))
{
Directory.CreateDirectory(path);
}
using (MdbxEnvironment env = new MdbxEnvironment())
{
env.SetMaxDatabases(20)
.SetMaxReaders(128)
.Open(path, EnvironmentFlag.NoTLS, Convert.ToInt32("666", 8));
using (MdbxTransaction tran = env.BeginTransaction())
{
MdbxDatabase db = tran.OpenDatabase("cursor_test2", DatabaseOption.Create
| DatabaseOption.IntegerKey /*opitimized for fixed size int or long key*/
);
db.Empty(); // clean this data table for test
// add some keys
for (int i = 0; i < 5; i++)
{
db.Put(i + 1, (i + 1).ToString());
}
tran.Commit();
}
using (MdbxTransaction tran = env.BeginTransaction())
{
MdbxDatabase db = tran.OpenDatabase("cursor_test2");
using (MdbxCursor cursor = db.OpenCursor())
{
cursor.Put(2, "2a"); // update by key
int key = 0;
string value = null;
cursor.Get(ref key, ref value, CursorOp.Next); // move to next
Assert.Equal(3, key);
cursor.Del(); // delete current one
key = 0;
value = null;
cursor.Get(ref key, ref value, CursorOp.GetCurrent);
Assert.Equal(4, key);
key = 0;
value = null;
cursor.Get(ref key, ref value, CursorOp.Prev);
Assert.Equal(2, key);
Assert.Equal("2a", value);
}
tran.Commit();
}
env.Close();
}
}
public void Test1()
{
string path = Path.Combine(Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location), "mdbx");
if (!Directory.Exists(path))
{
Directory.CreateDirectory(path);
}
using (MdbxEnvironment env = new MdbxEnvironment())
{
env.SetMaxDatabases(20)
.SetMaxReaders(128)
.Open(path, EnvironmentFlag.NoTLS, Convert.ToInt32("666", 8));
using (MdbxTransaction tran = env.BeginTransaction())
{
MdbxDatabase db = tran.OpenDatabase("cursor_test1", DatabaseOption.Create);
db.Empty(); // clean this data table for test
string[] keys = new string[]
{
"Q", "W", "E", "R", "T", "Y", "U", "I", "O", "P",
"A", "S", "D", "F", "G", "H", "J", "K", "L",
"Z", "X", "C", "V", "B", "N", "M"
};
// add some keys
foreach (string key in keys)
{
db.Put(key, key);
}
tran.Commit();
}
using (MdbxTransaction tran = env.BeginTransaction(TransactionOption.ReadOnly))
{
MdbxDatabase db = tran.OpenDatabase("cursor_test1");
using (MdbxCursor cursor = db.OpenCursor())
{
string key = null, value = null;
cursor.Get(ref key, ref value, CursorOp.First);
char c = 'A';
Assert.Equal(c.ToString(), key);
Assert.Equal(c.ToString(), value);
while (cursor.Get(ref key, ref value, CursorOp.Next))
{
c = (char)((int)c + 1);
Assert.Equal(c.ToString(), key);
Assert.Equal(c.ToString(), value);
}
}
}
env.Close();
}
}