public async Task<MainIndexRow> AppendObject(string id, byte[] data)
{
return await Task.Run(() =>
{
this.objectLock.EnterWriteLock();
try
{
this.objectStore.Add(data);
var index = this.objectStore.IndexOf(data);
var result = new MainIndexRow(id, index, data.Length, null);
return result;
}
finally
{
this.objectLock.ExitWriteLock();
}
});
}
public async Task AppendMainIndex(MainIndexRow item)
{
if (item == null)
throw new ArgumentNullException("item");
await Task.Run(() =>
{
this.mainIndexLock.EnterWriteLock();
try
{
var data = item.ToSekvap(this.lang);
this.mainIndex.Add(data);
}
finally
{
this.mainIndexLock.ExitWriteLock();
}
});
}
public async Task<MainIndexRow> SeekLatestMainIndex(string id)
{
if (string.IsNullOrEmpty(id))
throw new ArgumentException("The value cannot be empty", "id");
return await Task.Run(() =>
{
this.mainIndexLock.EnterReadLock();
try
{
for (int i = 0; i < this.mainIndex.Count; i++)
{
var itemAsString = this.mainIndex[this.mainIndex.Count - i - 1];
var itemData = this.lang.Parse(itemAsString);
var row = new MainIndexRow(itemData);
if (row.Id.Equals(id, StringComparison.OrdinalIgnoreCase))
{
return row;
}
}
return null;
}
finally
{
this.mainIndexLock.ExitReadLock();
}
});
}
public async Task<byte[]> GetObject(MainIndexRow row)
{
var result = this.store.ReadObjectStore(row.ObjectStoreBeginIndex.Value, row.ObjectStoreLength.Value);
return result;
}
public async Task<byte[][]> GetObjects(MainIndexRow[] rows)
{
if (rows == null)
throw new ArgumentNullException("rows");
return await Task.Run(() =>
{
this.objectLock.EnterReadLock();
try
{
var result = new byte[rows.Length][];
for (int i = 0; i < rows.Length; i++)
{
var row = rows[i];
if (row != null)
{
var bytes = this.objectStore[checked((int)row.ObjectStoreBeginIndex)];
Debug.Assert(bytes.Length == row.ObjectStoreLength, "MemoryStore.GetObject: bytes.Length != row.ObjectStoreLength");
result[i] = bytes;
}
}
return result;
}
finally
{
this.objectLock.ExitReadLock();
}
});
}
internal MainIndexRow ReadMainIndex(int index)
{
if (index >= this.mainIndex.Count)
return null;
var itemAsString = this.mainIndex[this.mainIndex.Count - index - 1];
var itemData = this.lang.Parse(itemAsString);
var row = new MainIndexRow(itemData);
return row;
}
public async Task<byte[]> GetObject(MainIndexRow row)
{
if (row == null)
throw new ArgumentNullException("row");
return await Task.Run(() =>
{
this.objectLock.EnterReadLock();
try
{
var bytes = this.objectStore[checked((int)row.ObjectStoreBeginIndex)];
Debug.Assert(bytes.Length == row.ObjectStoreLength, "MemoryStore.GetObject: bytes.Length != row.ObjectStoreLength");
return bytes;
}
finally
{
this.objectLock.ExitReadLock();
}
});
}
public async Task<MainIndexRow[]> SeekLatestMainIndex(string[] ids)
{
if (ids == null)
throw new ArgumentNullException("ids");
return await Task.Run(() =>
{
this.mainIndexLock.EnterReadLock();
try
{
var result = new MainIndexRow[ids.Length];
for (int i = 0; i < this.mainIndex.Count; i++)
{
var itemAsString = this.mainIndex[this.mainIndex.Count - i - 1];
var itemData = this.lang.Parse(itemAsString);
var row = new MainIndexRow(itemData);
for (int j = 0; j < ids.Length; j++)
{
var id = ids[j];
if (id != null && row.Id.Equals(id, StringComparison.OrdinalIgnoreCase))
{
if (result[j] == null)
{
result[j] = row;
if (result.All(r => r != null))
{
return result;
}
}
}
}
}
return result;
}
finally
{
this.mainIndexLock.ExitReadLock();
}
});
}
public Task<byte[][]> GetObjects(MainIndexRow[] rows)
{
throw new NotImplementedException();
}
public async Task<byte[]> GetObject(MainIndexRow row)
{
this.GetObjectCount += 1;
return await this.GetObjectDelegate(row);
}
public async Task AppendMainIndex(MainIndexRow row)
{
this.AppendMainIndexCount += 1;
await this.AppendMainIndexDelegate(row);
}