/// <summary>
/// Locks the item in the remote storage. The item must implement <see cref="IVirtualLock"/> interface.
/// </summary>
/// <param name="lockSync">Sync lock.</param>
/// <param name="lockMode">Indicates automatic or manual lock.</param>
private async Task <ServerLockInfo> LockAsync(LockSync lockSync, LockMode lockMode)
{
ServerLockInfo lockInfo = null;
try
{
logger.LogMessage("Locking in remote storage", userFileSystemPath);
// Set lock-pending icon.
await userFileSystemRawItem.SetLockPendingIconAsync(true);
// Lock file in remote storage.
IVirtualLock userLock = await GetItemAsync(userFileSystemPath) as IVirtualLock;
lockInfo = await userLock.LockAsync();
// Save lock-token and lock-mode.
await lockManager.SetLockInfoAsync(lockInfo);
await lockManager.SetLockModeAsync(lockMode);
logger.LogMessage("Locked in remote storage succesefully.", userFileSystemPath);
}
catch (Exception ex)
{
logger.LogError("Locking in remote storage failed.", userFileSystemPath, null, ex);
// Delete lock-token and lock-mode files.
await lockManager.DeleteLockAsync();
// Clear lock icon.
await userFileSystemRawItem.SetLockInfoAsync(null);
// Rethrow the exception preserving stack trace of the original exception.
System.Runtime.ExceptionServices.ExceptionDispatchInfo.Capture(ex).Throw();
}
// Set locked icon and all lock properties.
await userFileSystemRawItem.SetLockInfoAsync(lockInfo);
return(lockInfo);
}
/// <summary>
/// Unlocks the file in the remote storage using existing <see cref="LockSync"/>.
/// </summary>
/// <param name="lockSync">Sync lock.</param>
private async Task UnlockAsync(LockSync lockSync)
{
logger.LogMessage("Unlocking in remote storage", userFileSystemPath);
// Set pending icon.
await userFileSystemRawItem.SetLockPendingIconAsync(true);
// Read lock-token from lock-info file.
string lockToken = (await lockManager.GetLockInfoAsync()).LockToken;
// Unlock file in remote storage.
IVirtualLock userLock = await GetItemAsync(userFileSystemPath) as IVirtualLock;
await userLock.UnlockAsync(lockToken);
// Delete lock-mode and lock-token files.
await lockManager.DeleteLockAsync();
// Remove lock icon.
await userFileSystemRawItem.SetLockInfoAsync(null);
logger.LogMessage("Unlocked in remote storage succesefully", userFileSystemPath);
}
