/// <summary>
/// Opens a <see cref="ValueCheckpointFile"/> from the given file.
/// The file stream will be disposed when the checkpoint file is disposed.
/// </summary>
/// <param name="filename">The file to open that contains an existing checkpoint file.</param>
/// <param name="traceType">Tracing information.</param>
public static async Task <ValueCheckpointFile> OpenAsync(string filename, string traceType)
{
FabricEvents.Events.ValueCheckpointFileAsyncOpen(traceType, DiskConstants.state_opening, filename);
Diagnostics.Assert(FabricFile.Exists(filename), traceType, "File name {0} does not exist", filename);
ValueCheckpointFile checkpointFile = null;
try
{
checkpointFile = new ValueCheckpointFile(filename);
await checkpointFile.ReadMetadataAsync().ConfigureAwait(false);
}
catch (Exception)
{
// Ensure the checkpoint file get disposed quickly if we get an exception.
if (checkpointFile != null)
{
checkpointFile.Dispose();
}
throw;
}
FabricEvents.Events.ValueCheckpointFileAsyncOpen(traceType, DiskConstants.state_complete, filename);
return(checkpointFile);
}
/// <summary>
/// Opens a TStore checkpoint from the given file name.
/// </summary>
/// <param name="filename">The file to open that contains an existing checkpoint.</param>
/// <param name="traceType">Tracing information.</param>
/// <param name="isValueReferenceType"></param>
public static async Task <CheckpointFile> OpenAsync(string filename, string traceType, bool isValueReferenceType)
{
KeyCheckpointFile keyFile = null;
ValueCheckpointFile valueFile = null;
try
{
keyFile = await KeyCheckpointFile.OpenAsync(filename + KeyCheckpointFile.FileExtension, traceType, isValueReferenceType).ConfigureAwait(false);
valueFile = await ValueCheckpointFile.OpenAsync(filename + ValueCheckpointFile.FileExtension, traceType).ConfigureAwait(false);
return(new CheckpointFile(filename, keyFile, valueFile, traceType));
}
catch (Exception)
{
// Ensure the key and value files get disposed quickly if we get an exception.
// Normally the CheckpointFile would dispose them, but it may not get constructed.
if (keyFile != null)
{
keyFile.Dispose();
}
if (valueFile != null)
{
valueFile.Dispose();
}
throw;
}
}
