/// <nodoc />
public void SaveFrontEndSnapshot(IWorkspaceBindingSnapshot snapshot)
{
try
{
ExceptionUtilities.HandleRecoverableIOException(
() => DoSaveFrontEndSnapshot(),
e => throw new BuildXLException(string.Empty, e));
}
catch (BuildXLException e)
{
m_logger.SaveFrontEndSnapshotError(m_loggingContext, m_cacheFileName, e.InnerException.ToString());
}
void DoSaveFrontEndSnapshot()
{
var sw = Stopwatch.StartNew();
using (var file = FileUtilities.CreateFileStream(m_cacheFileName, FileMode.Create, FileAccess.ReadWrite, FileShare.Delete))
{
var writer = new BuildXLWriter(debug: false, stream: file, leaveOpen: true, logStats: false);
writer.WriteCompact(Version);
FrontEndSnapshotSerializer.SerializeWorkspaceBindingSnapshot(snapshot, writer, m_pathTable);
}
m_frontEndStatistics.FrontEndSnapshotSavingDuration = sw.Elapsed;
m_logger.SaveFrontEndSnapshot(m_loggingContext, m_cacheFileName, (int)sw.ElapsedMilliseconds);
}
}
public WorkspaceBindingSnapshot TryLoadFrontEndSnapshot(int expectedSpecCount)
{
try
{
return(ExceptionUtilities.HandleRecoverableIOException(
() => DoLoadFrontEndSnapshot(),
e => throw new BuildXLException(string.Empty, e)));
}
catch (BuildXLException e)
{
// Recoverable exceptions should not break BuildXL.
m_logger.FailToReuseFrontEndSnapshot(m_loggingContext, I($"IO exception occurred: {e.InnerException}"));
return(null);
}
WorkspaceBindingSnapshot DoLoadFrontEndSnapshot()
{
if (!File.Exists(m_cacheFileName))
{
// Can't reuse the snapshot because the file does not exist.
m_logger.FailToReuseFrontEndSnapshot(m_loggingContext, I($"File '{m_cacheFileName}' does not exist"));
return(null);
}
var sw = Stopwatch.StartNew();
using (var file = FileUtilities.CreateFileStream(m_cacheFileName, FileMode.Open, FileAccess.ReadWrite, FileShare.Delete))
{
var reader = new BuildXLReader(debug: false, stream: file, leaveOpen: true);
var version = reader.ReadInt32Compact();
if (version != Version)
{
// Version mismatch. Can't reuse the file.
m_logger.FailToReuseFrontEndSnapshot(
m_loggingContext,
I($"Cache version '{version}' does not match an expected version '{Version}'"));
return(null);
}
var specCount = reader.ReadInt32Compact();
if (expectedSpecCount != specCount)
{
// Can't use the cache, because it has different amount of specs in there.
m_logger.FailToReuseFrontEndSnapshot(
m_loggingContext,
I($"Cache contains the data for '{specCount}' specs but current execution requires '{expectedSpecCount}' specs"));
return(null);
}
var specs = FrontEndSnapshotSerializer.DeserializeSpecStates(reader, m_pathTable, specCount);
m_frontEndStatistics.FrontEndSnapshotLoadingDuration = sw.Elapsed;
m_logger.LoadFrontEndSnapshot(m_loggingContext, specs.Length, (int)sw.ElapsedMilliseconds);
return(new WorkspaceBindingSnapshot(specs, m_pathTable));
}
}
}
