/// <summary>
/// Read a single state provider metadata from the stream.
/// </summary>
/// <param name="reader">Stream to read from.</param>
/// <param name="traceType">Tracing type information.</param>
/// <param name="deserializeTypes">Should the types be deserialized.</param>
/// <returns>The read state provider metadata.</returns>
private static SerializableMetadata ReadMetadata(InMemoryBinaryReader reader, string traceType, bool deserializeTypes = true)
{
var startPosition = reader.BaseStream.Position;
var recordSize = reader.ReadInt32();
var name = reader.ReadUri();
Utility.Assert(name != null, "{0}: Name for the State Provider cannot be null.", traceType);
string typeName = null;
var type = reader.ReadType(out typeName);
Utility.Assert(type != null, SR.Assert_SM_TypeNotFound, traceType, typeName, name.ToString());
var createLsn = reader.ReadInt64();
var deleteLsn = reader.ReadInt64();
var initializationParameters = reader.ReadNullableBytes();
var metadataMode = (MetadataMode)reader.ReadInt32();
var stateProviderId = reader.ReadInt64();
var parentStateProviderId = reader.ReadInt64();
var endPosition = reader.BaseStream.Position;
var readRecordSize = checked ((int)(endPosition - startPosition));
if (readRecordSize != recordSize)
{
throw new InvalidDataException(string.Format(CultureInfo.CurrentCulture, SR.Error_SMFile_Corrupt_RecordSize));
}
if (deserializeTypes)
{
// Re-create the state provider metadata.
return(new SerializableMetadata(
name,
type,
initializationParameters,
stateProviderId,
parentStateProviderId,
metadataMode,
createLsn,
deleteLsn));
}
// Test only.
return(new SerializableMetadata(
name,
typeName,
initializationParameters,
stateProviderId,
parentStateProviderId,
metadataMode,
createLsn,
deleteLsn));
}
/// <summary>
/// Reads the state provider metadata from the next chunk of copy data.
/// </summary>
/// <param name="operationData">The next chunk of copy data.</param>
/// <param name="traceType">Tracing type information.</param>
/// <returns>The copied set of state providers' metadata.</returns>
internal static IEnumerable <SerializableMetadata> ReadCopyData(OperationData operationData, string traceType)
{
if (operationData == null)
{
throw new ArgumentNullException("operationData");
}
if (operationData.Count <= 0)
{
throw new ArgumentException("OperationData contains zero data.", "operationData");
}
// The state manager currently sends a single array segment per operation data.
var itemData = operationData[0];
var operationType =
(StateManagerCopyOperation)itemData.Array[itemData.Offset + itemData.Count - 1];
using (var itemStream = new MemoryStream(itemData.Array, itemData.Offset, itemData.Count - 1))
using (var itemReader = new InMemoryBinaryReader(itemStream))
{
if (operationType == StateManagerCopyOperation.Version)
{
// Verify the copy protocol version is known.
var copyProtocolVersion = itemReader.ReadInt32();
if (copyProtocolVersion != CopyProtocolVersion)
{
throw new InvalidDataException(
string.Format(CultureInfo.CurrentCulture, SR.Error_SMFile_UnknownCopyProtocol_OneArg, copyProtocolVersion));
}
}
else if (operationType == StateManagerCopyOperation.StateProviderMetadata)
{
// Read the chunk of state provider metadata.
while (itemStream.Position < itemStream.Length)
{
yield return(ReadMetadata(itemReader, traceType, true));
}
}
else
{
throw new InvalidDataException(
string.Format(CultureInfo.CurrentCulture, SR.Error_SMFile_UnknownSMCopyOperation_OneArg, operationType));
}
}
}
/// <summary>
/// Deserialize the header for the OperationData
/// </summary>
internal void DeserializeContext(
OperationData operationData,
int version,
string traceType)
{
Utility.Assert(
operationData != null,
"{0}: DeserializeContext: Null named operation data during create",
this.TraceType);
Utility.Assert(
operationData.Count > 0,
"{0}:DeserializeContext: Named operation data should have atleast one buffer during create",
this.TraceType);
var headerBufferSPtr = operationData[operationData.Count - 1];
bool isStateProviderDataNull;
using (InMemoryBinaryReader reader = new InMemoryBinaryReader(new MemoryStream(
headerBufferSPtr.Array,
headerBufferSPtr.Offset,
headerBufferSPtr.Count)))
{
this.Version = reader.ReadInt32();
if (this.Version != version)
{
FabricEvents.Events.OnApplyVersionError(traceType, this.Version, version);
throw new NotSupportedException(
string.Format(
CultureInfo.InvariantCulture,
"Unsupported version {0} on deserialization, current version is {1}",
this.Version,
version));
}
this.StateProviderId = reader.ReadInt64();
isStateProviderDataNull = reader.ReadBoolean();
}
// Remove state manager metadata from data.
operationData.RemoveAt(operationData.Count - 1);
this.OperationData = isStateProviderDataNull ? null : operationData;
}
/// <summary>
/// Deserializes replication metadata.
/// </summary>
public static void DeserializeMetadataForUndoOperation(
InMemoryBinaryReader metaDataReader,
string traceType,
int currentVersion,
out long stateProviderId,
out Uri stateProviderName,
out StateManagerApplyType applyType)
{
try
{
// Read meta data.
int version;
DeserializeMetadata(
metaDataReader,
traceType,
currentVersion,
out stateProviderId,
out stateProviderName,
out applyType,
out version);
Utility.Assert(applyType != StateManagerApplyType.Invalid, "Invalid apply type");
if (applyType == StateManagerApplyType.Delete)
{
applyType = StateManagerApplyType.Insert;
}
else
{
applyType = StateManagerApplyType.Delete;
}
}
catch (Exception e)
{
StateManagerStructuredEvents.TraceException(
traceType,
"ReplicationMetadata.Deserialize",
string.Empty,
e);
throw;
}
}
/// <summary>
/// Deserializes replication metadata.
/// </summary>
private static void DeserializeMetadata(
InMemoryBinaryReader metaDataReader,
string traceType,
int currentVersion,
out long stateProviderId,
out Uri stateProviderName,
out StateManagerApplyType applyType,
out int version)
{
try
{
version = metaDataReader.ReadInt32();
if (version != currentVersion)
{
var errorMessage = string.Format(
CultureInfo.InvariantCulture,
SR.Error_Unsupported_Version_Deserialization,
version,
currentVersion);
FabricEvents.Events.ReplicationMetadataDeserializeError(traceType, errorMessage);
throw new NotSupportedException(errorMessage);
}
stateProviderId = metaDataReader.ReadInt64();
stateProviderName = metaDataReader.ReadUri();
applyType = (StateManagerApplyType)metaDataReader.ReadByte();
Utility.Assert(applyType != StateManagerApplyType.Invalid, "Invalid apply type");
}
catch (Exception e)
{
StateManagerStructuredEvents.TraceException(
traceType,
"ReplicationMetadata.Deserialize",
string.Empty,
e);
throw;
}
}
/// <summary>
/// Read the list of state providers' metadata from the <see cref="StateManagerFile"/>.
/// </summary>
/// <param name="stream">Stream to read from.</param>
/// <param name="traceType">Tracing type information.</param>
/// <param name="deserializeTypes">Should the types be deserialized.</param>
/// <param name="cancellationToken">Token used to signal cancellation.</param>
/// <returns>The list of state providers' metadata read.</returns>
private async Task <List <SerializableMetadata> > ReadMetadataAsync(
Stream stream,
string traceType,
bool deserializeTypes,
CancellationToken cancellationToken)
{
var metadataList = new List <SerializableMetadata>((int)this.properties.StateProviderCount);
// Read the blocks, to improve sequential reads.
var blocks = await FileBlock.ReadBlockAsync(
stream,
this.properties.BlocksHandle,
(sectionReader, sectionHandle) => StateManagerFileBlocks.Read(sectionReader, sectionHandle)).ConfigureAwait(false);
// Currently, we expect the block sizes to always be present.
if (blocks == null || blocks.RecordBlockSizes == null)
{
throw new InvalidDataException(string.Format(CultureInfo.CurrentCulture, SR.Error_SMFile_Corrupt_BlockSizesMissing));
}
var recordBlockSizes = blocks.RecordBlockSizes;
// Read blocks from the file. Each state provider metadata is checksummed individually.
using (var itemStream = new MemoryStream(DesiredBlockSize * 2))
using (var itemReader = new InMemoryBinaryReader(itemStream))
{
stream.Position = this.properties.MetadataHandle.Offset;
var endOffset = this.properties.MetadataHandle.EndOffset;
// Each block has one or more state provider metadata records.
foreach (var recordBlockSize in recordBlockSizes)
{
if (stream.Position + recordBlockSize > endOffset)
{
throw new InvalidDataException(
string.Format(CultureInfo.CurrentCulture, SR.Error_SMFile_Corrupt_BlockExtendPastFile));
}
// Read the block into memory.
itemStream.Position = 0;
itemStream.SetLength(recordBlockSize);
await stream.ReadAsync(itemStream.GetBuffer(), 0, recordBlockSize, cancellationToken).ConfigureAwait(false);
// Read to the end of the metadata section.
var endBlockOffset = itemStream.Length;
while (itemStream.Position < endBlockOffset)
{
var position = itemStream.Position;
// Read the record size and validate it is not obviously corrupted.
if (position + sizeof(int) > endBlockOffset)
{
throw new InvalidDataException(
string.Format(CultureInfo.CurrentCulture, SR.Error_SMFile_Corrupt_MissingRecordSize));
}
var recordSize = itemReader.ReadInt32();
var recordSizeWithChecksum = recordSize + sizeof(ulong);
// We need to do extra validation on the recordSize, because we haven't validated the bits
// against the checksum and we need the recordSize to locate the checksum.
if (recordSize < 0)
{
throw new InvalidDataException(
string.Format(CultureInfo.CurrentCulture, SR.Error_SMFile_Corrupt_NegativeRecordSize));
}
if (position + recordSize > endBlockOffset)
{
throw new InvalidDataException(
string.Format(CultureInfo.CurrentCulture, SR.Error_SMFile_Corrupt_RecordExtendsPastFile));
}
if (position + recordSizeWithChecksum > endBlockOffset)
{
throw new InvalidDataException(
string.Format(CultureInfo.CurrentCulture, SR.Error_SMFile_Corrupt_MissingChecksum));
}
// Compute the checksum.
var computedChecksum = CRC64.ToCRC64(
itemStream.GetBuffer(),
checked ((int)position),
recordSize);
// Read the checksum (checksum is after the record bytes).
itemStream.Position = position + recordSize;
var checksum = itemReader.ReadUInt64();
// Verify the checksum.
if (checksum != computedChecksum)
{
throw new InvalidDataException(
string.Format(CultureInfo.CurrentCulture, SR.Error_SMFile_Corrupt_MismatchedChecksum));
}
// Read and re-create the state provider metadata, now that the checksum is validated.
itemStream.Position = position;
var metadata = ReadMetadata(itemReader, traceType, deserializeTypes);
metadataList.Add(metadata);
itemStream.Position = position + recordSizeWithChecksum;
}
}
}
// Post-validation.
if (metadataList.Count != (int)this.Properties.StateProviderCount)
{
throw new InvalidDataException(
string.Format(CultureInfo.CurrentCulture, SR.Error_SMFile_Corrupt_MetadataCountMismatch));
}
return(metadataList);
}
/// <summary>
/// Deserializes replication metadata and the redodata.
/// </summary>
public static ReplicationMetadata Deserialize(
InMemoryBinaryReader metaDataReader,
InMemoryBinaryReader redoDataReader,
string traceType,
int currentVersion)
{
try
{
// Read meta data first
long stateProviderId;
Uri name;
StateManagerApplyType operationType;
int version;
DeserializeMetadata(
metaDataReader,
traceType,
currentVersion,
out stateProviderId,
out name,
out operationType,
out version);
if (redoDataReader == null)
{
return(new ReplicationMetadata(
name,
stateProviderId,
DynamicStateManager.StateManagerId,
version,
operationType));
}
// Read Data Next
string typeName;
Type type = redoDataReader.ReadType(out typeName);
Utility.Assert(type != null, SR.Assert_SM_TypeNotFound, traceType, typeName, name.ToString());
byte[] initializationParameters = redoDataReader.ReadNullableBytes();
long parentStateProviderId = redoDataReader.ReadInt64();
// Since this is used in redo only scenarios, it is safe to assuem apply type is same as the original opeartion type.
ReplicationMetadata replicationMetadata = new ReplicationMetadata(
name,
type,
initializationParameters,
stateProviderId,
parentStateProviderId,
version,
operationType);
return(replicationMetadata);
}
catch (Exception e)
{
StateManagerStructuredEvents.TraceException(
traceType,
"ReplicationMetadata.Deserialize",
string.Empty,
e);
throw;
}
}