public void Update()
{
if (this.catalogReader == null)
{
return;
}
// since the cache is possibly shared by several store readers,
// we need to lock before making changes
lock (this.syncRoot)
{
if (this.catalogReader == null || !this.catalogReader.HasMoreData())
{
return;
}
byte[] buffer = new byte[1024]; // will resize as needed
var newMetadata = new List <Metadata>();
var newStreamDescriptors = new Dictionary <string, PsiStreamMetadata>(this.streamDescriptors);
var newStreamDescriptorsById = new Dictionary <int, PsiStreamMetadata>(this.streamDescriptorsById);
while (this.catalogReader.MoveNext())
{
var count = this.catalogReader.ReadBlock(ref buffer);
var br = new BufferReader(buffer, count);
var meta = Metadata.Deserialize(br);
if (meta.Kind == MetadataKind.RuntimeInfo)
{
// we expect this to be first in the file (or completely missing in v0 files)
this.runtimeVersion = meta as RuntimeInfo;
// Need to review this with Mihai. The issue was that the RemoteExporter is not writing
// out the RuntimeInfo to the stream. This causes the RemoteImporter side of things to
// never see a RuntimeInfo metadata object and thus it assumes that the stream is using
// version 0.0 of serialization (i.e. non-data-contract version) which causes a mismatch
// in the serialization resulting in throw from TypeSchema.ValidateCompatibleWith. This
// change fixes the issue.
newMetadata.Add(meta);
}
else
{
newMetadata.Add(meta);
if (meta.Kind == MetadataKind.StreamMetadata)
{
var sm = meta as PsiStreamMetadata;
sm.PartitionName = this.name;
sm.PartitionPath = this.path;
// the same meta entry will appear multiple times (written on open and on close).
// The last one wins.
newStreamDescriptors[sm.Name] = sm;
newStreamDescriptorsById[sm.Id] = sm;
}
}
}
// compute the time ranges
this.activeTimeRange = GetTimeRange(newStreamDescriptors.Values, meta => meta.ActiveLifetime);
this.originatingTimeRange = GetTimeRange(newStreamDescriptors.Values, meta => meta.OriginatingLifetime);
// clean up if the catalog is closed and we really reached the end
if (!this.catalogReader.IsMoreDataExpected() && !this.catalogReader.HasMoreData())
{
this.catalogReader.Dispose();
this.catalogReader = null;
}
// swap the caches
this.streamDescriptors = newStreamDescriptors;
this.streamDescriptorsById = newStreamDescriptorsById;
// let the registered delegates know about the change
if (newMetadata.Count > 0 && this.entriesAdded != null)
{
this.entriesAdded(newMetadata, this.runtimeVersion);
}
}
}
public void Dispose()
{
this.fileReader?.Dispose();
this.fileReader = null;
}
public PageIndexCache(string name, string path)
{
this.indexReader = new InfiniteFileReader(path, PsiStoreCommon.GetIndexFileName(name));
}
