/// <summary>
/// Initializes a new instance of the <see cref="Metadata"/> class.
/// </summary>
internal Metadata(
Uri name,
Type type,
IStateProvider2 stateProvider,
byte[] initializationParameters,
long stateProviderId,
long parentId,
long createLsn,
long deleteLsn,
MetadataMode metadataMode,
bool transientCreate)
{
Utility.Assert(name != null, "Name cannot be empty in metadata.");
Utility.Assert(type != null, "type cannot be null.");
Utility.Assert(stateProvider != null, "state provider cannot be null.");
Utility.Assert(
stateProviderId != DynamicStateManager.EmptyStateProviderId,
"state provider id cannot be empty.");
// Parent Id can be empty so do not assert on it.
this.Initialize(
name,
type,
stateProvider,
initializationParameters,
stateProviderId,
parentId,
createLsn,
deleteLsn,
metadataMode,
transientCreate);
}
/// <summary>
/// Initializes metadata.
/// </summary>
private void Initialize(
Uri name,
Type type,
IStateProvider2 stateProvider,
byte[] initializationParameters,
long stateProviderId,
long parentId,
long createLsn,
long deleteLsn,
MetadataMode metadataMode,
bool transientCreate)
{
this.Name = name;
this.Type = type;
this.StateProvider = stateProvider;
this.StateProviderId = stateProviderId;
this.InitializationContext = initializationParameters;
this.CreateLsn = createLsn;
this.DeleteLsn = deleteLsn;
this.TransientCreate = transientCreate;
this.TransientDelete = false;
this.checkpointFlag = 1;
this.MetadataMode = metadataMode;
this.TransactionId = 0;
this.ParentStateProviderId = parentId;
}
private CompressionLevelInferrer PickEncoder(MetadataMode metadataMode)
{
switch (metadataMode)
{
case MetadataMode.Preserve:
return(metadataPreservedService);
case MetadataMode.Discard:
return(metadataDiscardedService);
default: throw new NotSupportedException("The mode is supported");
}
}
/// <summary>
/// Initializes a new instance of the <see cref="SerializableMetadata"/> class.
/// </summary>
public SerializableMetadata(
Uri name,
string type,
byte[] initializationParameters,
long stateProviderId,
long parentStateProviderId,
MetadataMode metadataMode,
long createLsn,
long deleteLsn) : this(name, initializationParameters, stateProviderId, parentStateProviderId, metadataMode, createLsn, deleteLsn)
{
Utility.Assert(type != null, "type cannot be null.");
this.TypeString = type;
this.Type = null;
}
/// <summary>
/// Deletes state provider key from the dictionary. This is called as a part of a transaction only. Hence lock has already been acquired and no lock is needed.
/// </summary>
public void SoftDelete(Uri key, MetadataMode metadataMode)
{
var lockContext = this.keylocks[key];
Metadata metadata = null;
this.inMemoryState.TryGetValue(key, out metadata);
Utility.Assert(
metadata != null,
"{0}: SoftDelete: Metadata cannot be null for state provider: {1}",
this.traceType,
key.OriginalString);
Utility.Assert(
metadata.StateProvider != null,
"{0}: SoftDelete: State provider cannot be null for {1}",
this.traceType,
key.OriginalString);
// close the state provider. not closing for now, to avoid race conditions with copy.
// await metadata.StateProvider.CloseAsync().ConfigureAwait(false);
metadata.MetadataMode = metadataMode;
var addMetadataToDeleteList = this.DeletedStateProviders.TryAdd(metadata.StateProviderId, metadata);
Utility.Assert(
addMetadataToDeleteList,
"{0}: SoftDelete: failed to add state provider {1} to delete list",
this.traceType,
key.OriginalString);
// only data is removed here, lock should not be removed here as unlock of this transaction needs the lock.
Metadata metadataToBeRemoved = null;
var isRemoved = this.inMemoryState.TryRemove(key, out metadataToBeRemoved);
Utility.Assert(
isRemoved,
"{0}: SoftDelete: failed to remove data for key {1}",
this.traceType,
key.OriginalString);
// Remove from id-stateprovider provider map.
Metadata outMetadata = null;
isRemoved = this.stateProviderIdMap.TryRemove(metadata.StateProviderId, out outMetadata);
Utility.Assert(
isRemoved,
"{0}: SoftDelete: failed to remove data for key {1} from stateprovider id map",
this.traceType,
metadata.StateProviderId);
}
/// <summary>
/// Initializes a new instance of the <see cref="SerializableMetadata"/> class.
/// </summary>
internal SerializableMetadata(
Uri name,
byte[] initializationParameters,
long stateProviderId,
long parentStateProviderId,
MetadataMode metadataMode,
long createLsn,
long deleteLsn)
{
Utility.Assert(name != null, "Name cannot be empty in replication metadata.");
Utility.Assert(stateProviderId != DynamicStateManager.EmptyStateProviderId, "state provider id cannot be empty.");
this.Name = name;
this.CreateLsn = createLsn;
this.DeleteLsn = deleteLsn;
this.InitializationContext = initializationParameters;
this.StateProviderId = stateProviderId;
this.ParentStateProviderId = parentStateProviderId;
this.MetadataMode = metadataMode;
}
public Range <int> InferCompressionLevel(FileInfo sourceFile, int targetCompressionLevel, MetadataMode metadataMode)
{
CompressionLevelInferrer service = PickEncoder(metadataMode);
return(service.InferCompressionLevel(sourceFile, targetCompressionLevel));
}
internal void Start(bool resume)
{
ClientEngine.MainLoop.QueueWait(delegate
{
CheckRegisteredAndDisposed();
this.Engine.Start();
// If the torrent was "paused", then just update the state to Downloading and forcefully
// make sure the peers begin sending/receiving again
if (this.State == TorrentState.Paused)
{
Mode = new DownloadMode(this);
return;
}
if (!HasMetadata)
{
if (TrackerManager.CurrentTracker != null)
{
this.TrackerManager.Announce(TorrentEvent.Started);
}
Mode = new MetadataMode(this, _torrentSaveFolder);
#if !DISABLE_DHT
StartDht();
#endif
return;
}
VerifyHashState();
// If the torrent has not been hashed, we start the hashing process then we wait for it to finish
// before attempting to start again
if (!HashChecked)
{
if (State != TorrentState.Hashing)
{
HashCheck(true);
}
return;
}
if (State == TorrentState.Seeding || State == TorrentState.Downloading)
{
return;
}
if (TrackerManager.CurrentTracker != null && !resume)
{
if (this.TrackerManager.CurrentTracker.CanScrape)
{
this.TrackerManager.Scrape();
}
this.TrackerManager.Announce(TorrentEvent.Started); // Tell server we're starting
}
if (this.Complete && this.Settings.InitialSeedingEnabled && ClientEngine.SupportsInitialSeed)
{
Mode = new InitialSeedingMode(this);
}
else
{
Mode = new DownloadMode(this);
}
Engine.Broadcast(this);
#if !DISABLE_DHT
StartDht();
#endif
this.StartTime = DateTime.Now;
this.PieceManager.Reset();
ClientEngine.MainLoop.QueueTimeout(TimeSpan.FromSeconds(2), delegate
{
if (State != TorrentState.Downloading && State != TorrentState.Seeding)
{
return(false);
}
PieceManager.Picker.CancelTimedOutRequests();
return(true);
});
});
}