private IEnumerable<LightningKeyValuePair> GetAll(string database)
{
var list = new List<LightningKeyValuePair>();
var txn = GetReadonlyTransaction();
var db = OpenDatabase(database);
using (var cursor = txn.CreateCursor(db))
{
foreach (var item in cursor)
{
var kv = new LightningKeyValuePair { Key = item.Key, Value = item.Value };
list.Add(kv);
}
}
if (txn.State == LightningTransactionState.Active)
txn.Reset();
return list;
}
/// <summary>
/// Gets the key-value pair identified by the specified key, from the specified database.
/// </summary>
/// <param name="database">The database.</param>
/// <param name="key">The key.</param>
/// <returns></returns>
private LightningKeyValuePair Get(string database, byte[] key)
{
var txn = GetReadonlyTransaction();
var db = OpenDatabase(database);
var kv = new LightningKeyValuePair { Key = key };
kv.Value = txn.Get(db, key);
if (txn.State == LightningTransactionState.Active)
txn.Reset();
return kv;
}
private IEnumerable<LightningKeyValuePair> Get(string database, IEnumerable<byte[]> keys)
{
var list = new List<LightningKeyValuePair>();
var txn = GetReadonlyTransaction();
var db = OpenDatabase(database);
using (var cur = txn.CreateCursor(db))
{
foreach (var key in keys)
{
if (cur.MoveTo(key))
{
var kv = new LightningKeyValuePair
{
Key = key,
Value = cur.GetCurrent().Value
};
list.Add(kv);
}
}
}
if (txn.State == LightningTransactionState.Active)
txn.Reset();
return list;
}
/// <summary>
/// Updates the specified Lightning key-value pair, in the specified database.
/// </summary>
/// <param name="database">The database.</param>
/// <param name="kv">The key-value pair.</param>
/// <returns></returns>
public async Task<int> UpdateAsync(string database, LightningKeyValuePair kv)
{
return await UpdateAsync(database, new[] { kv }).ConfigureAwait(false);
}
