private IList <ValueTuple <Checksum, object> > ReadAssets(
Stream stream, int sessionId, ISet <Checksum> checksums, CancellationToken cancellationToken)
{
var results = new List <ValueTuple <Checksum, object> >();
using (var reader = StreamObjectReader.TryGetReader(stream))
{
Debug.Assert(reader != null,
@"We only ge a reader for data transmitted between live processes.
This data should always be correct as we're never persisting the data between sessions.");
var responseSessionId = reader.ReadInt32();
Contract.ThrowIfFalse(sessionId == responseSessionId);
var count = reader.ReadInt32();
Contract.ThrowIfFalse(count == checksums.Count);
for (var i = 0; i < count; i++)
{
var responseChecksum = new Checksum(reader.ReadArray <byte>());
Contract.ThrowIfFalse(checksums.Contains(responseChecksum));
var kind = reader.ReadString();
// in service hub, cancellation means simply closed stream
var @object = _owner.RoslynServices.AssetService.Deserialize <object>(kind, reader, cancellationToken);
results.Add(ValueTuple.Create(responseChecksum, @object));
}
return(results);
}
}
private static async Task <bool> PrecalculatedAsync(Document document, string persistenceName, string formatVersion, CancellationToken cancellationToken)
{
Contract.Requires(document.IsFromPrimaryBranch());
var persistentStorageService = document.Project.Solution.Workspace.Services.GetService <IPersistentStorageService>();
var syntaxVersion = await document.GetSyntaxVersionAsync(cancellationToken).ConfigureAwait(false);
// check whether we already have info for this document
try
{
using (var storage = persistentStorageService.GetStorage(document.Project.Solution))
using (var stream = await storage.ReadStreamAsync(document, persistenceName, cancellationToken).ConfigureAwait(false))
using (var reader = StreamObjectReader.TryGetReader(stream))
{
if (reader != null)
{
return(TryReadVersion(reader, formatVersion, out var persistVersion) &&
document.CanReusePersistedSyntaxTreeVersion(syntaxVersion, persistVersion));
}
}
}
catch (Exception e) when(IOUtilities.IsNormalIOException(e))
{
// Storage APIs can throw arbitrary exceptions.
}
return(false);
}
private static async Task VerifyOptionSetsAsync(Workspace workspace, string language)
{
var assetBuilder = new CustomAssetBuilder(workspace.CurrentSolution);
var serializer = new Serializer(workspace.Services);
var asset = assetBuilder.Build(workspace.Options, language, CancellationToken.None);
using (var stream = SerializableBytes.CreateWritableStream())
using (var writer = new StreamObjectWriter(stream))
{
await asset.WriteObjectToAsync(writer, CancellationToken.None).ConfigureAwait(false);
stream.Position = 0;
using (var reader = new StreamObjectReader(stream))
{
var recovered = serializer.Deserialize <OptionSet>(asset.Kind, reader, CancellationToken.None);
var assetFromStorage = assetBuilder.Build(recovered, language, CancellationToken.None);
Assert.Equal(asset.Checksum, assetFromStorage.Checksum);
// option should be exactly same
Assert.Equal(0, recovered.GetChangedOptions(workspace.Options).Count());
}
}
}
private IList<ValueTuple<Checksum, object>> ReadAssets(
Stream stream, int sessionId, ISet<Checksum> checksums, CancellationToken cancellationToken)
{
var results = new List<ValueTuple<Checksum, object>>();
using (var reader = new StreamObjectReader(stream))
{
var responseSessionId = reader.ReadInt32();
Contract.ThrowIfFalse(sessionId == responseSessionId);
var count = reader.ReadInt32();
Contract.ThrowIfFalse(count == checksums.Count);
for (var i = 0; i < count; i++)
{
var responseChecksum = new Checksum(reader.ReadArray<byte>());
Contract.ThrowIfFalse(checksums.Contains(responseChecksum));
var kind = reader.ReadString();
// in service hub, cancellation means simply closed stream
var @object = _owner.RoslynServices.AssetService.Deserialize<object>(kind, reader, cancellationToken);
results.Add(ValueTuple.Create(responseChecksum, @object));
}
return results;
}
}
public async Task TestSymbolTreeInfoSerialization()
{
var solution = GetSolution(WorkspaceKind.SingleClass);
var compilation = await solution.Projects.First().GetCompilationAsync();
var assembly = compilation.GetSpecialType(SpecialType.System_Byte).ContainingAssembly;
////var assembly = compilation.Assembly;
// create symbol tree info from assembly
var version = VersionStamp.Create();
var info = SymbolTreeInfo.CreateSourceSymbolTreeInfo(
solution, version, assembly, "", cancellationToken: CancellationToken.None);
using (var writerStream = new MemoryStream())
{
using (var writer = new StreamObjectWriter(writerStream))
{
info.WriteTo(writer);
}
using (var readerStream = new MemoryStream(writerStream.ToArray()))
using (var reader = new StreamObjectReader(readerStream))
{
var readInfo = SymbolTreeInfo.ReadSymbolTreeInfo_ForTestingPurposesOnly(reader);
info.AssertEquivalentTo(readInfo);
}
}
}
protected override Data TryGetExistingData(Stream stream, Document value, CancellationToken cancellationToken)
{
var list = SharedPools.Default <List <TodoItem> >().AllocateAndClear();
try
{
using (var reader = new StreamObjectReader(stream))
{
var format = reader.ReadString();
if (!string.Equals(format, FormatVersion))
{
return(null);
}
var textVersion = VersionStamp.ReadFrom(reader);
var dataVersion = VersionStamp.ReadFrom(reader);
AppendItems(reader, value, list, cancellationToken);
return(new Data(textVersion, dataVersion, list.ToImmutableArray <TodoItem>()));
}
}
catch (Exception)
{
return(null);
}
finally
{
SharedPools.Default <List <TodoItem> >().ClearAndFree(list);
}
}
protected static async Task <T> LoadAsync <T>(
Document document, string persistenceName, string formatVersion,
Func <ObjectReader, VersionStamp, T> readFrom, CancellationToken cancellationToken) where T : AbstractPersistableState
{
var persistentStorageService = document.Project.Solution.Workspace.Services.GetService <IPersistentStorageService>();
var syntaxVersion = await document.GetSyntaxVersionAsync(cancellationToken).ConfigureAwait(false);
// attempt to load from persisted state
using (var storage = persistentStorageService.GetStorage(document.Project.Solution))
using (var stream = await storage.ReadStreamAsync(document, persistenceName, cancellationToken).ConfigureAwait(false))
{
if (stream == null)
{
return(null);
}
using (var reader = new StreamObjectReader(stream))
{
VersionStamp persistVersion;
if (TryReadVersion(reader, formatVersion, out persistVersion) &&
document.CanReusePersistedSyntaxTreeVersion(syntaxVersion, persistVersion))
{
return(readFrom(reader, syntaxVersion));
}
}
}
return(null);
}
private static async Task <SyntaxTreeIndex> LoadAsync(
Document document, string persistenceName, string formatVersion,
Func <ObjectReader, VersionStamp, SyntaxTreeIndex> readFrom, CancellationToken cancellationToken)
{
var persistentStorageService = document.Project.Solution.Workspace.Services.GetService <IPersistentStorageService>();
var syntaxVersion = await document.GetSyntaxVersionAsync(cancellationToken).ConfigureAwait(false);
try
{
// attempt to load from persisted state
using (var storage = persistentStorageService.GetStorage(document.Project.Solution))
using (var stream = await storage.ReadStreamAsync(document, persistenceName, cancellationToken).ConfigureAwait(false))
using (var reader = StreamObjectReader.TryGetReader(stream))
{
if (reader != null)
{
if (TryReadVersion(reader, formatVersion, out var persistVersion) &&
document.CanReusePersistedSyntaxTreeVersion(syntaxVersion, persistVersion))
{
return(readFrom(reader, syntaxVersion));
}
}
}
}
catch (Exception e) when(IOUtilities.IsNormalIOException(e))
{
// Storage APIs can throw arbitrary exceptions.
}
return(null);
}
private IList <ValueTuple <Checksum, object> > ReadAssets(
Stream stream, int sessionId, ISet <Checksum> checksums, CancellationToken cancellationToken)
{
var results = new List <ValueTuple <Checksum, object> >();
using (var reader = new StreamObjectReader(stream))
{
var responseSessionId = reader.ReadInt32();
Contract.ThrowIfFalse(sessionId == responseSessionId);
var count = reader.ReadInt32();
Contract.ThrowIfFalse(count == checksums.Count);
for (var i = 0; i < count; i++)
{
var responseChecksum = new Checksum(reader.ReadArray <byte>());
Contract.ThrowIfFalse(checksums.Contains(responseChecksum));
var kind = reader.ReadString();
// in service hub, cancellation means simply closed stream
var @object = _owner.RoslynServices.AssetService.Deserialize <object>(kind, reader, cancellationToken);
results.Add(ValueTuple.Create(responseChecksum, @object));
}
return(results);
}
}
private async Task <DiagnosticAnalysisResultMap <DiagnosticAnalyzer, DiagnosticAnalysisResult> > GetCompilerAnalysisResultAsync(Stream stream, Dictionary <string, DiagnosticAnalyzer> analyzerMap, Project project, CancellationToken cancellationToken)
{
// handling of cancellation and exception
var version = await DiagnosticIncrementalAnalyzer.GetDiagnosticVersionAsync(project, cancellationToken).ConfigureAwait(false);
using (var reader = new StreamObjectReader(stream))
{
return(DiagnosticResultSerializer.Deserialize(reader, analyzerMap, project, version, cancellationToken));
}
}
private async Task <DiagnosticAnalysisResultMap <DiagnosticAnalyzer, DiagnosticAnalysisResult> > GetCompilerAnalysisResultAsync(Stream stream, Dictionary <string, DiagnosticAnalyzer> analyzerMap, Project project, CancellationToken cancellationToken)
{
// handling of cancellation and exception
var version = await DiagnosticIncrementalAnalyzer.GetDiagnosticVersionAsync(project, cancellationToken).ConfigureAwait(false);
using (var reader = StreamObjectReader.TryGetReader(stream))
{
Debug.Assert(reader != null,
@"We only ge a reader for data transmitted between live processes.
This data should always be correct as we're never persisting the data between sessions.");
return(DiagnosticResultSerializer.Deserialize(reader, analyzerMap, project, version, cancellationToken));
}
}
private void TestInvalidStreamVersion()
{
var stream = new MemoryStream();
stream.WriteByte(0);
stream.WriteByte(0);
stream.Position = 0;
var reader = StreamObjectReader.TryGetReader(stream);
Assert.Null(reader);
}
private T RoundTrip <T>(T value, Action <ObjectWriter, T> writeAction, Func <ObjectReader, T> readAction)
{
var stream = new MemoryStream();
var binder = new RecordingObjectBinder();
var writer = new StreamObjectWriter(stream, binder: binder);
writeAction(writer, value);
writer.Dispose();
stream.Position = 0;
using (var reader = new StreamObjectReader(stream, binder: binder))
{
return((T)readAction(reader));
}
}
private void TestRoundTrip(Action <ObjectWriter> writeAction, Action <ObjectReader> readAction)
{
var stream = new MemoryStream();
var binder = new RecordingObjectBinder();
var writer = new StreamObjectWriter(stream, binder: binder);
writeAction(writer);
writer.Dispose();
stream.Position = 0;
using (var reader = new StreamObjectReader(stream, binder: binder))
{
readAction(reader);
}
}
private VersionStamp GetIdentifierSetVersion(EsentStorage.Key key, int identifierId, object unused1, object unused2, CancellationToken cancellationToken)
{
using (var accessor = _esentStorage.GetIdentifierLocationTableAccessor())
using (var stream = accessor.GetReadStream(key, identifierId))
{
if (stream == null)
{
return(VersionStamp.Default);
}
using (var reader = new StreamObjectReader(stream))
{
return(VersionStamp.ReadFrom(reader));
}
}
}
public void VersionStamp_RoundTripText()
{
using (var writerStream = new MemoryStream())
using (var writer = new StreamObjectWriter(writerStream))
{
var versionStamp = VersionStamp.Create();
versionStamp.WriteTo(writer);
using (var readerStream = new MemoryStream(writerStream.ToArray()))
using (var reader = new StreamObjectReader(readerStream))
{
var deserializedVersionStamp = VersionStamp.ReadFrom(reader);
Assert.Equal(versionStamp, deserializedVersionStamp);
}
}
}
public void VersionStamp_RoundTripText()
{
using (var writerStream = new MemoryStream())
using (var writer = new StreamObjectWriter(writerStream))
{
var versionStamp = VersionStamp.Create();
versionStamp.WriteTo(writer);
using (var readerStream = new MemoryStream(writerStream.ToArray()))
using (var reader = new StreamObjectReader(readerStream))
{
var deserializedVersionStamp = VersionStamp.ReadFrom(reader);
Assert.Equal(versionStamp, deserializedVersionStamp);
}
}
}
/// <summary>
/// Deserialize a syntax node from the byte stream.
/// </summary>
public static SyntaxNode DeserializeFrom(Stream stream, CancellationToken cancellationToken = default(CancellationToken))
{
if (stream == null)
{
throw new ArgumentNullException(nameof(stream));
}
if (!stream.CanRead)
{
throw new InvalidOperationException(CSharpResources.TheStreamCannotBeReadFrom);
}
using (var reader = new StreamObjectReader(stream, knownObjects: GetDeserializationObjectData(), binder: s_defaultBinder, cancellationToken: cancellationToken))
{
var root = (Syntax.InternalSyntax.CSharpSyntaxNode)reader.ReadValue();
return(root.CreateRed());
}
}
private static async Task <RemotableData> CloneAssetAsync(Serializer serializer, RemotableData asset)
{
using (var stream = SerializableBytes.CreateWritableStream())
using (var writer = new StreamObjectWriter(stream))
{
await asset.WriteObjectToAsync(writer, CancellationToken.None).ConfigureAwait(false);
stream.Position = 0;
using (var reader = new StreamObjectReader(stream))
{
var recovered = serializer.Deserialize <object>(asset.Kind, reader, CancellationToken.None);
var assetFromStorage = SolutionAsset.Create(serializer.CreateChecksum(recovered, CancellationToken.None), recovered, serializer);
Assert.Equal(asset.Checksum, assetFromStorage.Checksum);
return(assetFromStorage);
}
}
}
public void TestSerialization()
{
var stream = new MemoryStream();
var bloomFilter = new BloomFilter(0.001, false, new[] { "Hello, World" });
using (var writer = new StreamObjectWriter(stream))
{
bloomFilter.WriteTo(writer);
}
stream.Position = 0;
using (var reader = new StreamObjectReader(stream))
{
var rehydratedFilter = BloomFilter.ReadFrom(reader);
Assert.True(bloomFilter.IsEquivalent(rehydratedFilter));
}
}
private T RoundTrip <T>(T value, Action <ObjectWriter, T> writeAction, Func <ObjectReader, T> readAction, bool recursive)
{
var stream = new MemoryStream();
var binder = new RecordingObjectBinder();
var writer = new StreamObjectWriter(stream, binder: binder, recursive: recursive);
writeAction(writer, value);
writer.Dispose();
stream.Position = 2;
Assert.Equal(recursive, StreamObjectReader.IsRecursive(stream));
stream.Position = 0;
using (var reader = StreamObjectReader.TryGetReader(stream, binder: binder))
{
return((T)readAction(reader));
}
}
private void RoundTrip(Action <ObjectWriter> writeAction, Action <ObjectReader> readAction, bool recursive)
{
var stream = new MemoryStream();
var binder = new RecordingObjectBinder();
var writer = new StreamObjectWriter(stream, binder: binder, recursive: recursive);
writeAction(writer);
writer.Dispose();
stream.Position = 0;
Assert.Equal(recursive, StreamObjectReader.IsRecursive(stream));
stream.Position = 0;
using (var reader = new StreamObjectReader(stream, binder: binder))
{
readAction(reader);
}
}
private static bool TryReadFrom(Project project, string keyName, out Versions versions)
{
versions = default(Versions);
var service = project.Solution.Workspace.Services.GetService <IPersistentStorageService>();
if (service == null)
{
return(false);
}
using (var storage = service.GetStorage(project.Solution))
using (var stream = storage.ReadStreamAsync(keyName, CancellationToken.None).WaitAndGetResult(CancellationToken.None))
{
if (stream == null)
{
return(false);
}
try
{
using (var reader = new StreamObjectReader(stream))
{
var formatVersion = reader.ReadInt32();
if (formatVersion != SerializationFormat)
{
return(false);
}
var persistedProjectVersion = VersionStamp.ReadFrom(reader);
var persistedSemanticVersion = VersionStamp.ReadFrom(reader);
versions = new Versions(persistedProjectVersion, persistedSemanticVersion);
return(true);
}
}
catch (Exception)
{
return(false);
}
}
}
protected override Data TryGetExistingData(Stream stream, Document value, CancellationToken cancellationToken)
{
using (var reader = StreamObjectReader.TryGetReader(stream))
{
if (reader != null)
{
var format = reader.ReadString();
if (string.Equals(format, FormatVersion, StringComparison.InvariantCulture))
{
var textVersion = VersionStamp.ReadFrom(reader);
var dataVersion = VersionStamp.ReadFrom(reader);
var designerAttributeArgument = reader.ReadString();
return(new Data(textVersion, dataVersion, designerAttributeArgument));
}
}
}
return(null);
}
public async Task <StrongBox <ImmutableArray <DiagnosticData> > > DeserializeAsync(object documentOrProject, string key, CancellationToken cancellationToken)
{
// we have persisted data
var solution = GetSolution(documentOrProject);
var persistService = solution.Workspace.Services.GetService <IPersistentStorageService>();
using (var storage = persistService.GetStorage(solution))
using (var stream = await ReadStreamAsync(storage, key, documentOrProject, cancellationToken).ConfigureAwait(false))
using (var reader = StreamObjectReader.TryGetReader(stream))
{
if (reader == null)
{
return(null);
}
// we return StrongBox rather than ImmutableArray due to task lib's issue with allocations
// when returning default(value type)
return(ReadFrom(reader, documentOrProject, cancellationToken));
}
}
public static async Task <T> GetValueAsync <T>(this ISolutionSynchronizationService service, Checksum checksum)
{
var syncService = (SolutionSynchronizationServiceFactory.Service)service;
var syncObject = service.GetRemotableData(checksum, CancellationToken.None);
using (var stream = SerializableBytes.CreateWritableStream())
using (var writer = new StreamObjectWriter(stream))
{
// serialize asset to bits
await syncObject.WriteObjectToAsync(writer, CancellationToken.None).ConfigureAwait(false);
stream.Position = 0;
using (var reader = new StreamObjectReader(stream))
{
// deserialize bits to object
var serializer = syncService.Serializer_TestOnly;
return(serializer.Deserialize <T>(syncObject.Kind, reader, CancellationToken.None));
}
}
}
public void TestObjectMapLimits()
{
using (var stream = new MemoryStream())
{
var instances = new List <TypeWithTwoMembers <int, string> >();
// We need enough items to exercise all sizes of ObjectRef
for (int i = 0; i < ushort.MaxValue + 1; i++)
{
instances.Add(new TypeWithTwoMembers <int, string>(i, i.ToString()));
}
var binder = new RecordingObjectBinder();
var writer = new StreamObjectWriter(stream, binder: binder);
// Write each instance twice. The second time around, they'll become ObjectRefs
for (int pass = 0; pass < 2; pass++)
{
foreach (var instance in instances)
{
writer.WriteValue(instance);
}
}
writer.Dispose();
stream.Position = 0;
using (var reader = new StreamObjectReader(stream, binder: binder))
{
for (int pass = 0; pass < 2; pass++)
{
foreach (var instance in instances)
{
var obj = reader.ReadValue();
Assert.NotNull(obj);
Assert.True(Equalish(obj, instance));
}
}
}
}
}
public async Task<StrongBox<ImmutableArray<DiagnosticData>>> DeserializeAsync(object documentOrProject, string key, CancellationToken cancellationToken)
{
// we have persisted data
var solution = GetSolution(documentOrProject);
var persistService = solution.Workspace.Services.GetService<IPersistentStorageService>();
using (var storage = persistService.GetStorage(solution))
using (var stream = await ReadStreamAsync(storage, key, documentOrProject, cancellationToken).ConfigureAwait(false))
{
if (stream == null)
{
return null;
}
using (var reader = new StreamObjectReader(stream))
{
// we return StrongBox rather than ImmutableArray due to task lib's issue with allocations
// when returning default(value type)
return ReadFrom(reader, documentOrProject, cancellationToken);
}
}
}
private TimeSpan TestReaderPerf(int iterations, bool recursive)
{
int id = 0;
var graph = ConstructGraph(ref id, 5, 3);
var stream = new MemoryStream();
var binder = new RecordingObjectBinder();
var writer = new StreamObjectWriter(stream, binder: binder, recursive: recursive);
writer.WriteValue(graph);
writer.Dispose();
var start = DateTime.Now;
for (int i = 0; i < iterations; i++)
{
stream.Position = 0;
var reader = new StreamObjectReader(stream, binder: binder);
var item = reader.ReadValue();
}
return(DateTime.Now - start);
}
protected override Data TryGetExistingData(Stream stream, Document value, CancellationToken cancellationToken)
{
using (var reader = StreamObjectReader.TryGetReader(stream))
{
if (reader != null)
{
var format = reader.ReadString();
if (string.Equals(format, FormatVersion))
{
var textVersion = VersionStamp.ReadFrom(reader);
var dataVersion = VersionStamp.ReadFrom(reader);
var list = ArrayBuilder <TodoItem> .GetInstance();
AppendItems(reader, value, list, cancellationToken);
return(new Data(textVersion, dataVersion, list.ToImmutableAndFree()));
}
}
}
return(null);
}
private bool ReadIdentifierPositions(EsentStorage.Key key, int identifierId, List <int> positions, object unused, CancellationToken cancellationToken)
{
using (var accessor = _esentStorage.GetIdentifierLocationTableAccessor())
using (var stream = accessor.GetReadStream(key, identifierId))
{
if (stream == null)
{
// no such identifier exist.
return(true);
}
using (var reader = new StreamObjectReader(stream))
{
var formatVersion = reader.ReadString();
if (formatVersion != IdentifierSetSerializationVersion)
{
return(false);
}
return(ReadFrom(reader, positions, cancellationToken));
}
}
}
protected static async Task <bool> PrecalculatedAsync(Document document, string persistenceName, string formatVersion, CancellationToken cancellationToken)
{
Contract.Requires(document.IsFromPrimaryBranch());
var persistentStorageService = document.Project.Solution.Workspace.Services.GetService <IPersistentStorageService>();
var syntaxVersion = await document.GetSyntaxVersionAsync(cancellationToken).ConfigureAwait(false);
// check whether we already have info for this document
using (var storage = persistentStorageService.GetStorage(document.Project.Solution))
using (var stream = await storage.ReadStreamAsync(document, persistenceName, cancellationToken).ConfigureAwait(false))
{
if (stream != null)
{
using (var reader = new StreamObjectReader(stream))
{
return(TryReadVersion(reader, formatVersion, out var persistVersion) &&
document.CanReusePersistedSyntaxTreeVersion(syntaxVersion, persistVersion));
}
}
}
return(false);
}
private async Task<DiagnosticAnalysisResultMap<DiagnosticAnalyzer, DiagnosticAnalysisResult>> GetCompilerAnalysisResultAsync(Stream stream, Dictionary<string, DiagnosticAnalyzer> analyzerMap, Project project, CancellationToken cancellationToken)
{
// handling of cancellation and exception
var version = await DiagnosticIncrementalAnalyzer.GetDiagnosticVersionAsync(project, cancellationToken).ConfigureAwait(false);
using (var reader = new StreamObjectReader(stream))
{
return DiagnosticResultSerializer.Deserialize(reader, analyzerMap, project, version, cancellationToken);
}
}
public async Task TestSymbolTreeInfoSerialization()
{
var solution = GetSolution(WorkspaceKind.SingleClass);
var compilation = await solution.Projects.First().GetCompilationAsync();
var assembly = compilation.GetSpecialType(SpecialType.System_Byte).ContainingAssembly;
////var assembly = compilation.Assembly;
// create symbol tree info from assembly
var version = VersionStamp.Create();
var info = SymbolTreeInfo.CreateSourceSymbolTreeInfo(
solution, version, assembly, "", cancellationToken: CancellationToken.None);
using (var writerStream = new MemoryStream())
{
using (var writer = new StreamObjectWriter(writerStream))
{
info.WriteTo(writer);
}
using (var readerStream = new MemoryStream(writerStream.ToArray()))
using (var reader = new StreamObjectReader(readerStream))
{
var readInfo = SymbolTreeInfo.ReadSymbolTreeInfo_ForTestingPurposesOnly(reader);
info.AssertEquivalentTo(readInfo);
}
}
}
public void TestSerialization()
{
var stream = new MemoryStream();
var bloomFilter = new BloomFilter(0.001, false, new[] { "Hello, World" });
using (var writer = new StreamObjectWriter(stream))
{
bloomFilter.WriteTo(writer);
}
stream.Position = 0;
using (var reader = new StreamObjectReader(stream))
{
var rehydratedFilter = BloomFilter.ReadFrom(reader);
Assert.True(bloomFilter.IsEquivalent(rehydratedFilter));
}
}
private static bool TryReadFrom(Project project, string keyName, out Versions versions)
{
versions = default(Versions);
var service = project.Solution.Workspace.Services.GetService<IPersistentStorageService>();
if (service == null)
{
return false;
}
using (var storage = service.GetStorage(project.Solution))
using (var stream = storage.ReadStreamAsync(keyName, CancellationToken.None).WaitAndGetResult(CancellationToken.None))
{
if (stream == null)
{
return false;
}
try
{
using (var reader = new StreamObjectReader(stream))
{
var formatVersion = reader.ReadInt32();
if (formatVersion != SerializationFormat)
{
return false;
}
var persistedProjectVersion = VersionStamp.ReadFrom(reader);
var persistedSemanticVersion = VersionStamp.ReadFrom(reader);
versions = new Versions(persistedProjectVersion, persistedSemanticVersion);
return true;
}
}
catch (Exception)
{
return false;
}
}
}
private static async Task VerifyOptionSetsAsync(Workspace workspace, string language)
{
var assetBuilder = new CustomAssetBuilder(workspace.CurrentSolution);
var serializer = new Serializer(workspace.Services);
var asset = assetBuilder.Build(workspace.Options, language, CancellationToken.None);
using (var stream = SerializableBytes.CreateWritableStream())
using (var writer = new StreamObjectWriter(stream))
{
await asset.WriteObjectToAsync(writer, CancellationToken.None).ConfigureAwait(false);
stream.Position = 0;
using (var reader = new StreamObjectReader(stream))
{
var recovered = serializer.Deserialize<OptionSet>(asset.Kind, reader, CancellationToken.None);
var assetFromStorage = assetBuilder.Build(recovered, language, CancellationToken.None);
Assert.Equal(asset.Checksum, assetFromStorage.Checksum);
// option should be exactly same
Assert.Equal(0, recovered.GetChangedOptions(workspace.Options).Count());
}
}
}
private static async Task<RemotableData> CloneAssetAsync(Serializer serializer, RemotableData asset)
{
using (var stream = SerializableBytes.CreateWritableStream())
using (var writer = new StreamObjectWriter(stream))
{
await asset.WriteObjectToAsync(writer, CancellationToken.None).ConfigureAwait(false);
stream.Position = 0;
using (var reader = new StreamObjectReader(stream))
{
var recovered = serializer.Deserialize<object>(asset.Kind, reader, CancellationToken.None);
var assetFromStorage = SolutionAsset.Create(serializer.CreateChecksum(recovered, CancellationToken.None), recovered, serializer);
Assert.Equal(asset.Checksum, assetFromStorage.Checksum);
return assetFromStorage;
}
}
}
private VersionStamp GetIdentifierSetVersion(EsentStorage.Key key, int identifierId, object unused1, object unused2, CancellationToken cancellationToken)
{
using (var accessor = _esentStorage.GetIdentifierLocationTableAccessor())
using (var stream = accessor.GetReadStream(key, identifierId))
{
if (stream == null)
{
return VersionStamp.Default;
}
using (var reader = new StreamObjectReader(stream))
{
return VersionStamp.ReadFrom(reader);
}
}
}
/// <summary>
/// Generalized function for loading/creating/persisting data. Used as the common core
/// code for serialization of SymbolTreeInfos and SpellCheckers.
/// </summary>
private static async Task <T> LoadOrCreateAsync <T>(
Solution solution,
string filePath,
bool loadOnly,
Func <VersionStamp, T> create,
string keySuffix,
Func <T, VersionStamp> getVersion,
Func <ObjectReader, T> readObject,
Action <ObjectWriter, T> writeObject,
CancellationToken cancellationToken) where T : class
{
// See if we can even use serialization. If not, we'll just have to make the value
// from scratch.
if (ShouldCreateFromScratch(solution, filePath, out var prefix, out var version, cancellationToken))
{
return(loadOnly ? null : create(VersionStamp.Default));
}
// Ok, we can use persistence. First try to load from the persistence service.
var persistentStorageService = solution.Workspace.Services.GetService <IPersistentStorageService>();
T result;
using (var storage = persistentStorageService.GetStorage(solution))
{
// Get the unique key to identify our data.
var key = PrefixMetadataSymbolTreeInfo + prefix + keySuffix;
using (var stream = await storage.ReadStreamAsync(key, cancellationToken).ConfigureAwait(false))
{
if (stream != null)
{
using (var reader = new StreamObjectReader(stream))
{
// We have some previously persisted data. Attempt to read it back.
// If we're able to, and the version of the persisted data matches
// our version, then we can reuse this instance.
result = readObject(reader);
if (result != null && VersionStamp.CanReusePersistedVersion(version, getVersion(result)))
{
return(result);
}
}
}
}
cancellationToken.ThrowIfCancellationRequested();
// Couldn't read from the persistence service. If we've been asked to only load
// data and not create new instances in their absense, then there's nothing left
// to do at this point.
if (loadOnly)
{
return(null);
}
// Now, try to create a new instance and write it to the persistence service.
result = create(version);
if (result != null)
{
using (var stream = SerializableBytes.CreateWritableStream())
using (var writer = new StreamObjectWriter(stream, cancellationToken: cancellationToken))
{
writeObject(writer, result);
stream.Position = 0;
await storage.WriteStreamAsync(key, stream, cancellationToken).ConfigureAwait(false);
}
}
}
return(result);
}
private bool ReadIdentifierPositions(EsentStorage.Key key, int identifierId, List<int> positions, object unused, CancellationToken cancellationToken)
{
using (var accessor = _esentStorage.GetIdentifierLocationTableAccessor())
using (var stream = accessor.GetReadStream(key, identifierId))
{
if (stream == null)
{
// no such identifier exist.
return true;
}
using (var reader = new StreamObjectReader(stream))
{
var formatVersion = reader.ReadString();
if (formatVersion != IdentifierSetSerializationVersion)
{
return false;
}
return ReadFrom(reader, positions, cancellationToken);
}
}
}
