/// <summary>
/// Releases resources associated with the task
/// </summary>
public override void Dispose()
{
base.Dispose();
if (this.backup != null)
this.backup.Dispose();
this.backup = null;
}
/// <summary>
/// Task execution override
/// </summary>
protected override void DoExecute()
{
// prepare the backup plugin for the session
// and mark it as in-progress
this.backup = this.Archive.PrepareBackup(this.Session);
if (this.Session.State == SkyFloe.Backup.SessionState.Pending)
{
this.Session.State = SkyFloe.Backup.SessionState.InProgress;
this.Archive.BackupIndex.UpdateSession(this.Session);
Checkpoint();
}
try
{
this.limiter = new IO.RateLimiter(this.Session.RateLimit);
var checkpointSize = 0L;
for (; ; )
{
this.Canceler.ThrowIfCancellationRequested();
// fetch the next pending backup entry and
// send it to the archive
var entry = this.Archive.BackupIndex.LookupNextEntry(this.Session);
if (entry == null)
break;
BackupEntry(entry);
// if we have reached the configured checkpoint
// size, then force a checkpoint
checkpointSize += entry.Length;
if (checkpointSize > this.Session.CheckpointLength)
{
checkpointSize = 0;
Checkpoint();
}
}
// there are no more pending backup entries, so complete the session
this.Session.State = SkyFloe.Backup.SessionState.Completed;
this.Archive.BackupIndex.UpdateSession(this.Session);
Checkpoint();
}
catch (OperationCanceledException)
{
// if the client requested cancellation, attempt to
// checkpoint the backup to save our progress
Checkpoint();
throw;
}
}