async Task SaveMefStateAsync(CompositionConfiguration config)
{
string filename = GetCachedCompositionConfigurationFilename();
bool fileCreated = false;
bool deleteFile = true;
try {
using (var cachedStream = File.Create(filename)) {
fileCreated = true;
long resourceManagerTokensOffsetTmp;
new CachedMefInfo(mefAssemblies, cachedStream).WriteFile(resourceManagerTokenCacheImpl.GetTokens(mefAssemblies), out resourceManagerTokensOffsetTmp);
await new CachedComposition().SaveAsync(config, cachedStream);
resourceManagerTokensOffset = resourceManagerTokensOffsetTmp;
deleteFile = false;
}
}
catch (IOException) {
}
catch (UnauthorizedAccessException) {
}
catch (SecurityException) {
}
finally {
if (fileCreated && deleteFile)
{
try {
File.Delete(filename);
}
catch { }
}
}
}
public void UpdateResourceManagerTokens(long resourceManagerTokensOffset, ResourceManagerTokenCacheImpl resourceManagerTokenCacheImpl)
{
if (resourceManagerTokensOffset < 0)
{
return;
}
stream.Position = resourceManagerTokensOffset;
var writer = new BinaryWriter(stream);
var tokens = resourceManagerTokenCacheImpl.GetTokens(assemblies);
if (tokens.Length != assemblies.Length)
{
throw new InvalidOperationException();
}
foreach (var token in tokens)
{
writer.Write(token);
}
}