/// <summary>
/// Constructor used for cloning
/// </summary>
/// <param name="cloneInput"></param>
public SyncIndexInput(SyncIndexInput cloneInput)
{
_name = cloneInput._name;
_syncDirectory = cloneInput._syncDirectory;
if (string.IsNullOrWhiteSpace(_name))
{
throw new ArgumentNullException(nameof(cloneInput._name));
}
if (_syncDirectory == null)
{
throw new ArgumentNullException(nameof(cloneInput._syncDirectory));
}
_fileMutex = SyncMutexManager.GrabMutex(cloneInput._syncDirectory, cloneInput._name);
_fileMutex.WaitOne();
try
{
#if FULLDEBUG
Trace.WriteLine($"Creating clone for {cloneInput._name}");
#endif
_cacheDirIndexInput = (IndexInput)cloneInput._cacheDirIndexInput.Clone();
}
catch (Exception)
{
// sometimes we get access denied on the 2nd stream...but not always. I haven't tracked it down yet
// but this covers our tail until I do
Trace.TraceError($"Dagnabbit, falling back to memory clone for {cloneInput._name}");
}
finally
{
_fileMutex.ReleaseMutex();
}
}
public override void Close()
{
_fileMutex.WaitOne();
try
{
#if FULLDEBUG
Trace.WriteLine($"CLOSED READSTREAM local {_name}");
#endif
_cacheDirIndexInput.Close();
_cacheDirIndexInput = null;
_syncDirectory = null;
GC.SuppressFinalize(this);
}
finally
{
_fileMutex.ReleaseMutex();
}
}
protected override void Dispose(bool disposing)
{
_fileMutex.WaitOne();
try
{
#if FULLDEBUG
_loggingService.Log(new LogEntry(LogLevel.Info, null, $"CLOSED READSTREAM local {_name}"));
#endif
_cacheDirIndexInput.Dispose();
_cacheDirIndexInput = null;
_syncDirectory = null;
GC.SuppressFinalize(this);
}
finally
{
_fileMutex.ReleaseMutex();
}
}
public SyncIndexOutput(SyncDirectory syncDirectory, string name)
{
if (syncDirectory == null)
{
throw new ArgumentNullException(nameof(syncDirectory));
}
//NOTE: _name was null here https://github.com/azure-contrib/AzureDirectory/issues/19
// I have changed this to be correct now
_name = name;
_syncDirectory = syncDirectory;
_fileMutex = SyncMutexManager.GrabMutex(_syncDirectory, _name);
_fileMutex.WaitOne();
try
{
// create the local cache one we will operate against...
_cacheDirIndexOutput = CacheDirectory.CreateOutput(_name);
}
finally
{
_fileMutex.ReleaseMutex();
}
}
public SyncIndexInput(SyncIndexInput cloneInput)
{
_fileMutex = SyncMutexManager.GrabMutex(cloneInput._syncDirectory, cloneInput._name);
_fileMutex.WaitOne();
try
{
#if FULLDEBUG
Debug.WriteLine($"Creating clone for {cloneInput._name}");
#endif
_syncDirectory = cloneInput._syncDirectory;
_indexInput = cloneInput._indexInput.Clone() as IndexInput;
}
catch (Exception)
{
// sometimes we get access denied on the 2nd stream...but not always. I haven't tracked it down yet
// but this covers our tail until I do
Trace.Fail($"Dagnabbit, falling back to memory clone for {cloneInput._name}");
}
finally
{
_fileMutex.ReleaseMutex();
}
}
/// <summary>
/// Constructor to create Lucene IndexInput for reading index files
/// </summary>
/// <param name="directory"></param>
/// <param name="name"></param>
/// <remarks>
/// This will not work for the segments.gen file because it doesn't compare to master and segments.gen is not write-once!
/// Therefore do not use this class from a Directory instance for that file, see SyncDirectory.OpenInput
/// </remarks>
public SyncIndexInput(SyncDirectory directory, string name)
{
if (directory == null)
{
throw new ArgumentNullException(nameof(directory));
}
_name = name;
_syncDirectory = directory;
#if FULLDEBUG
Trace.WriteLine($"opening {_name} ");
#endif
_fileMutex = SyncMutexManager.GrabMutex(_syncDirectory, _name);
_fileMutex.WaitOne();
try
{
var fileName = _name;
var fileNeeded = false;
bool fileExists;
//Check the cache folder for the file existing, it doesn't exist then the file is needed
if (!CacheDirectory.FileExists(fileName))
{
fileNeeded = true;
fileExists = false;
}
else
{
//Hrm, if the file already exists I think we're already in trouble but here's some logic to deal with that anyways.
fileExists = true;
//Normally we'd compare the file attributes to see if we need to override it but Lucene has write-once semantics so
//this is unecessary. If the file already exists locally then we will have to assume it is the correct file!
//fileNeeded = CompareExistingFileAttributes(fileName);
fileNeeded = false;
}
// if the file does not exist
// or if it exists and it is older then the lastmodified time in the blobproperties (which always comes from the blob storage)
if (fileNeeded)
{
SyncLocally(fileName);
_cacheDirIndexInput = CacheDirectory.OpenInput(fileName);
}
else
{
#if FULLDEBUG
Trace.WriteLine($"Using cached file for {_name}");
#endif
_cacheDirIndexInput = CacheDirectory.OpenInput(fileName);
}
}
finally
{
_fileMutex.ReleaseMutex();
}
}
/// <summary>
/// Constructor to create Lucene IndexInput for reading index files
/// </summary>
/// <param name="directory"></param>
/// <param name="name"></param>
/// <remarks>
/// This will not work for the segments.gen file because it doesn't compare to master and segments.gen is not write-once!
/// Therefore do not use this class from a Directory instance for that file, see SyncDirectory.OpenInput
/// </remarks>
public SyncIndexInput(SyncDirectory directory, string name) : this(directory, name, new TraceLoggingService())
{
}
public SyncIndexInput(SyncDirectory directory, string name)
{
if (directory == null)
{
throw new ArgumentNullException(nameof(directory));
}
_name = name;
_syncDirectory = directory;
#if FULLDEBUG
Trace.WriteLine($"opening {_name} ");
#endif
_fileMutex = SyncMutexManager.GrabMutex(_syncDirectory, _name);
_fileMutex.WaitOne();
try
{
var fileName = _name;
var fFileNeeded = false;
if (!CacheDirectory.FileExists(fileName))
{
fFileNeeded = true;
}
else
{
long cachedLength = CacheDirectory.FileLength(fileName);
long masterLength = MasterDirectory.FileLength(fileName);
if (cachedLength != masterLength)
{
fFileNeeded = true;
}
else
{
long cacheDate = CacheDirectory.FileModified(fileName);
long masterDate = MasterDirectory.FileModified(fileName);
//we need to compare to the second instead of by ticks because when we call
//TouchFile in SyncIndexOutput this won't set the files to be identical
DateTime start = new DateTime(1970, 1, 1, 0, 0, 0, DateTimeKind.Utc);
var cachedLastModifiedUTC = start.AddMilliseconds(cacheDate).ToUniversalTime();
var masterLastModifiedUTC = start.AddMilliseconds(masterDate).ToUniversalTime();
if (cachedLastModifiedUTC != masterLastModifiedUTC)
{
var timeSpan = masterLastModifiedUTC.Subtract(cachedLastModifiedUTC);
//NOTE: This heavily depends on TouchFile in SyncIndexOutput which sets both the
//master and slave files to be 'Now', in theory this operation shouldn't
//make the file times any bigger than 1 second
if (timeSpan.TotalSeconds > 2)
{
fFileNeeded = true;
}
else
{
#if FULLDEBUG
Debug.WriteLine(timeSpan.TotalSeconds);
#endif
// file not needed
}
}
}
}
// if the file does not exist
// or if it exists and it is older then the lastmodified time in the blobproperties (which always comes from the blob storage)
if (fFileNeeded)
{
//get the master file stream
using (var masterStream = new StreamInput(MasterDirectory.OpenInput(fileName)))
using (var cacheStream = _syncDirectory.CreateCachedOutputAsStream(fileName))
{
//copy this to the cached file stream
masterStream.CopyTo(cacheStream);
cacheStream.Flush();
Debug.WriteLine($"GET {_name} RETREIVED {cacheStream.Length} bytes");
}
// and open it as an input
_indexInput = CacheDirectory.OpenInput(fileName);
}
else
{
#if FULLDEBUG
Debug.WriteLine($"Using cached file for {_name}");
#endif
// open the file in read only mode
_indexInput = CacheDirectory.OpenInput(fileName);
}
}
finally
{
_fileMutex.ReleaseMutex();
}
}
public SyncIndexOutput(SyncDirectory syncDirectory, string name) : this(syncDirectory, name, new TraceLoggingService())
{
}