public void TermReader()
{
//Stop reading and disable/close the reader
if (this.mReader != null)
{
try {
//Stop all the notifications and detach all the notification handler if the user has not done it already
StopRead();
DetachReadNotify();
DetachStatusNotify();
//Disable the reader, and free it up
this.mReader.Actions.Disable();
this.mReader.Dispose();
this.mReader = null;
}
catch (Symbol.Exceptions.OperationFailureException ex) { MessageBox.Show("TermReader" + "\n" + "OperationFailure" + "\n" + ex.Message + "\n" + "Result" + " = " + (Symbol.Results)((uint)ex.Result)); }
catch (Symbol.Exceptions.InvalidRequestException ex) { MessageBox.Show("TermReader" + "\n" + "InvalidRequest" + "\n" + ex.Message); }
catch (Symbol.Exceptions.InvalidIndexerException ex) { MessageBox.Show("TermReader" + "\n" + "InvalidIndexer" + "\n" + ex.Message); }
}
// After disposing the reader, dispose the reader data.
if (this.mReaderData != null)
{
try {
//Free it up.
this.mReaderData.Dispose();
this.mReaderData = null;
}
catch (Symbol.Exceptions.OperationFailureException ex) { MessageBox.Show("TermReader" + "\n" + "OperationFailure" + "\n" + ex.Message + "\n" + "Result" + " = " + (Symbol.Results)((uint)ex.Result)); }
catch (Symbol.Exceptions.InvalidRequestException ex) { MessageBox.Show("TermReader" + "\n" + "InvalidRequest" + "\n" + ex.Message); }
catch (Symbol.Exceptions.InvalidIndexerException ex) { MessageBox.Show("TermReader" + "\n" + "InvalidIndexer" + "\n" + ex.Message); }
}
}
/// <summary>
/// Open the scanner device
/// </summary>
public void Open()
{
if (scannerStatus == ScannerStatus.Opened)
{
return;
}
try
{
reader = new Reader();
readerData = new ReaderData(ReaderDataTypes.Text, ReaderDataLengths.MaximumLabel);
reader.Actions.Enable();
// SuperGros ProductNumber
reader.Decoders.I2OF5.MinimumLength = 6;
reader.Decoders.I2OF5.MaximumLength = 14;
StartRead();
scannerStatus = ScannerStatus.Opened;
}
catch
{
Close();
throw;
}
}
public override bool Initialize()
{
// If the scanner is already present, fail to initialize
if (symbolReader != null)
{
return(false);
}
// Create a new scanner; use the first available scanner
symbolReader = new Reader();
// Create the scanner data
symbolReaderData = new ReaderData(ReaderDataTypes.Text,
ReaderDataLengths.MaximumLabel);
// Create the event handler delegate
symbolReader.ReadNotify += new EventHandler(symbolReader_ReadNotify);
// Enable the scanner with a wait cursor
symbolReader.Actions.Enable();
// Set up the scanner
//symbolReader.Parameters.Feedback.Success.BeepTime = 0;
//symbolReader.Parameters.Feedback.Success.WaveFile =Application2.StartupPath + "\\beep.wav";
return(true);
}
/// <summary>
/// Funckja pozawlająca na modyfiikowanie danych czytelnika.
/// </summary>
/// <param name="readerID">Identyfikator czytelnika</param>
/// <param name="newData">Nowe dane</param>
/// <param name="dataType">Modyfikowany parametr</param>
public void ModifyReaderData(int readerID, string newData, ReaderData dataType)
{
if (IsReaderIDExists(readerID))
{
if (newData.Trim() != "")
{
switch (dataType)
{
case ReaderData.Name:
readers.Find(r => r.ID.Equals(readerID)).Name = newData;
break;
case ReaderData.PhoneNumber:
readers.Find(r => r.ID.Equals(readerID)).PhoneNumber = newData;
break;
case ReaderData.EmailAddress:
readers.Find(r => r.ID.Equals(readerID)).EmailAddress = newData;
break;
}
}
else
{
throw new ArgumentException("Nowe dane nie mogą być puste");
}
}
else
{
throw new ArgumentException("Czytelnik o podanym identyfikatorze nie istnieje");
}
}
/// <summary>
/// Initiates the Symbol scanner.
/// </summary>
/// <returns>Whether initialization was successful</returns>
public override bool Initialize()
{
// If scanner is already present then fail initialize
if (symbolReader != null)
{
return(false);
}
// Create new scanner, first available scanner will be used.
symbolReader = new Reader();
// Create scanner data
symbolReaderData = new ReaderData(ReaderDataTypes.Text,ReaderDataLengths.DefaultText);
// Create event handler delegate
symbolReader.ReadNotify += new EventHandler(symbolReader_ReadNotify);
// Enable scanner, with wait cursor
symbolReader.Actions.Enable();
symbolReader.Actions.GetParameters();
// Setup scanner
symbolReader.Parameters.Feedback.Success.BeepTime = 0;
symbolReader.Parameters.Feedback.Success.WaveFile = "\\windows\\alarm3.wav";
// Для чтения кодов плохого качества
symbolReader.Decoders.CODE128.Enabled = true;
symbolReader.Decoders.CODE128.EAN128 = true;
symbolReader.Decoders.CODE128.SecurityLevel = CODE128.SECURITYLEVEL.LEVEL_3;
symbolReader.Decoders.CODE128.Redundancy = false;
symbolReader.Decoders.CODE128.Other128 = true;
symbolReader.Decoders.CODE128.MaximumLength = 55;
symbolReader.Decoders.I2OF5.Enabled = true;
symbolReader.Decoders.I2OF5.MaximumLength = 30;
symbolReader.Decoders.RSS14.Enabled =
symbolReader.Decoders.RSSEXP.Enabled =
symbolReader.Decoders.RSSLIM.Enabled = true;
symbolReader.Decoders.RSSEXP.MaximumLength = 76;
symbolReader.Actions.SetParameters();
// Настройка WiFi отображения
try
{
xWLan = new WLAN(FusionAccessType.STATISTICS_MODE);
base.WiFi = new SymWiFi(xWLan);
}
catch (Exception e)
{
//xRadio = new Radio();
//base.WiFi = new SymWiFi(xRadio);
}
return(true);
}
public Form1()
{
InitializeComponent();
Reader = new ReaderData();
bikes = Reader.Bikesarr;
FillGrid();
}
internal bool isBackground = false; //The flag used to track whether the application is in background or not (in foreground).
/// <summary>
/// Initialize the reader.
/// </summary>
public bool InitReader()
{
// If the reader is already initialized then fail the initialization.
if (myReader != null)
{
return(false);
}
else // Else initialize the reader.
{
try
{
// Get the device selected by the user.
for (int i = 0; i < Symbol.Barcode.Device.AvailableDevices.Count(); i++)
{
if (Device.AvailableDevices[i].DeviceName == "SCN1:")
{
MyDevice = Device.AvailableDevices[i];
}
}
if (MyDevice == null)
{
return(false);
}
// Create the reader, based on selected device.
myReader = new Reader(MyDevice);
// Create the reader data.
myReaderData = new ReaderData(
ReaderDataTypes.Text,
ReaderDataLengths.MaximumLabel);
// Enable the Reader.
myReader.Actions.Enable();
// In this sample, we are setting the aim type to trigger.
switch (myReader.ReaderParameters.ReaderType)
{
case Symbol.Barcode.READER_TYPE.READER_TYPE_IMAGER:
myReader.ReaderParameters.ReaderSpecific.ImagerSpecific.AimType = Symbol.Barcode.AIM_TYPE.AIM_TYPE_TRIGGER;
break;
case Symbol.Barcode.READER_TYPE.READER_TYPE_LASER:
myReader.ReaderParameters.ReaderSpecific.LaserSpecific.AimType = Symbol.Barcode.AIM_TYPE.AIM_TYPE_TRIGGER;
break;
case Symbol.Barcode.READER_TYPE.READER_TYPE_CONTACT:
// AimType is not supported by the contact readers.
break;
}
myReader.Actions.SetParameters();
}
catch
{
return(false);
}
return(true);
}
}
/// <summary>
/// Stop reading and disable/close reader.
/// </summary>
private void TermReader()
{
// If we have a reader
if (this.MyReader != null)
{
// Disable the reader
this.MyReader.Actions.Disable();
// Free it up
this.MyReader.Dispose();
// Indicate we no longer have one
this.MyReader = null;
}
// If we have a reader data
if (this.MyReaderData != null)
{
// Free it up
this.MyReaderData.Dispose();
// Indicate we no longer have one
this.MyReaderData = null;
}
}
public void Disable()
{
_suspendedFlag = true;
_reader.Actions.Flush();
_reader.Actions.Disable();
_readerData.Dispose();
_reader.Dispose();
_readerData = null;
_reader = null;
}
public bool InitReader()
{
//Initialize the reader
if (this.mReader != null)
{
return(false);
}
else
{
try {
//Get the device selected by the user
Symbol.Generic.Device device = Symbol.StandardForms.SelectDevice.Select(Symbol.Barcode.Device.Title, Symbol.Barcode.Device.AvailableDevices);
if (device == null)
{
MessageBox.Show("No Device Selected", "SelectDevice");
return(false);
}
//Create the reader based on selected device, and the reader data
this.mReader = new Symbol.Barcode.Reader(device);
this.mReaderData = new Symbol.Barcode.ReaderData(Symbol.Barcode.ReaderDataTypes.Text, Symbol.Barcode.ReaderDataLengths.MaximumLabel);
//Enable the Reader, and set the aim type to trigger.
this.mReader.Actions.Enable();
switch (this.mReader.ReaderParameters.ReaderType)
{
case Symbol.Barcode.READER_TYPE.READER_TYPE_IMAGER:
this.mReader.ReaderParameters.ReaderSpecific.ImagerSpecific.AimType = Symbol.Barcode.AIM_TYPE.AIM_TYPE_TRIGGER;
break;
case Symbol.Barcode.READER_TYPE.READER_TYPE_LASER:
this.mReader.ReaderParameters.ReaderSpecific.LaserSpecific.AimType = Symbol.Barcode.AIM_TYPE.AIM_TYPE_TRIGGER;
break;
case Symbol.Barcode.READER_TYPE.READER_TYPE_CONTACT:
// AimType is not supported by the contact readers.
break;
}
this.mReader.Actions.SetParameters();
}
catch (Symbol.Exceptions.OperationFailureException ex) {
MessageBox.Show("InitReader" + "\n" + "OperationFailure" + "\n" + ex.Message + "\n" + "Result" + " = " + (Symbol.Results)((uint)ex.Result));
return(false);
}
catch (Symbol.Exceptions.InvalidRequestException ex) { MessageBox.Show("InitReader" + "\n" + "InvalidRequest" + "\n" + ex.Message);
return(false); }
catch (Symbol.Exceptions.InvalidIndexerException ex) {
MessageBox.Show("InitReader" + "\n" + "InvalidIndexer" + "\n" + ex.Message);
return(false);
}
return(true);
}
}
private void ScannedDataEvent(object sender, EventArgs e)
{
ReaderData data = reader.GetNextReaderData();
if (data != null)
{
if (data.Result == Results.SUCCESS)
{
HandleData(data);
StartRead();
}
}
}
private void HandleData(ReaderData reader)
{
List <string> list = new List <string>();
list.Add(reader.Text);
if (Scanned != null)
{
Scanned.Invoke(this, new ScannedDataEventArgs(list.ToArray()));
}
scannerStatus = ScannerStatus.Opened;
}
//# __________ PROTOCOL :: PRIVATE __________ #//
public void IntializeReader()
{
_reader = new Reader();
_readerData = new ReaderData(
ReaderDataTypes.Text,
ReaderDataLengths.MaximumLabel);
_reader.ReadNotify += new EventHandler(r_ReadNotify);
_reader.Actions.Enable();
if( _shouldAllowCode93 ) _reader.Decoders.SetEnabled(DecoderTypes.CODE93, true);
// this.MyReader.Parameters.Feedback.Success.BeepTime = 0;
// this.MyReader.Parameters.Feedback.Success.WaveFile = "\\windows\\alarm3.wav";
}
private void HandleData(ReaderData data)
{
if (Scanned != null)
{
var barcodeData = new BarcodeData
{
Text = data.Text,
BarcodeType = (BarcodeTypes)data.Type
};
Scanned.Invoke(this, new ScannedDataEventArgs(new[] { barcodeData }));
}
scannerStatus = ScannerStatus.Opened;
}
private void symbolReader_ReadNotify(object sender, EventArgs e)
{
if (symbolReader != null)
{
ReaderData readerData = symbolReader.GetNextReaderData();
// If successful, scan
if (readerData.Result == Results.SUCCESS)
{
// Raise the scan event to the caller (with data)
OnBarcodeScan(new BarcodeScannerEventArgs(readerData.Text));
// Start the next scan
Start();
}
}
}
/// <summary>
/// Initialize the reader.
/// </summary>
private void InitReader()
{
// If reader is already present, fail.
if (MyReader != null)
{
return;
}
MyReader = new Symbol.Barcode.Reader();
if (MyReader == null)
{
throw new SymbolRFGunException("Unable to initialize reader");
}
// Create reader data.
// MyReaderData = new Symbol.Barcode.ReaderData(
// Symbol.Barcode.ReaderDataTypes.Text,
// Symbol.Barcode.ReaderDataLengths.DefaultText);
//8-18-2010 Changed to allow greater length for 2D barcodes 254 characters
MyReaderData = new Symbol.Barcode.ReaderData(
Symbol.Barcode.ReaderDataTypes.Text,
254);
if (MyReaderData == null)
{
throw new SymbolRFGunException("Unable to initialize reader data");
}
// Create event handler delegate.
MyEventHandler = new EventHandler(MyReader_ReadNotify);
if (MyEventHandler == null)
{
throw new SymbolRFGunException("Unable to initialize event handler for reader");
}
// Enable reader.
MyReader.Actions.Enable();
MyReader.Decoders.CODE39.FullAscii = true;
// Handle success and failure sounds manually.
MyReader.Parameters.Feedback.Success.BeepTime = 0;
// Start reader.
StartRead();
}
public static void SetDrawerActive(int drawerId)
{
if (CurrentActiveRfidDrawer == drawerId)
{
return;
}
if ((Device != null) && (Device.IsConnected))
{
_CurrentActiveRfidDrawer = drawerId;
if (DrawerInventoryData[_CurrentActiveRfidDrawer] == null)
{
DrawerInventoryData[_CurrentActiveRfidDrawer] = new ReaderData();
}
Device.ReaderData = DrawerInventoryData[_CurrentActiveRfidDrawer];
Device.StopField();
Device.SendSwitchCommand(true, (byte)_CurrentActiveRfidDrawer, false);
}
}
/// <summary>
/// Close the scanner device
/// </summary>
public void Close()
{
if (reader == null)
{
scannerStatus = ScannerStatus.Closed;
return;
}
StopRead();
reader.Actions.Disable();
reader.Dispose();
reader = null;
readerData.Dispose();
readerData = null;
scannerStatus = ScannerStatus.Closed;
}
public bool AddReader(ReaderData readerData)
{
try
{
using (IRepositoryTransactionContext ctx = ObjectContainer.Instance.GetService <IRepositoryTransactionContext>())
{
IRepository <Reader> readerRepository = ctx.GetRepository <Reader>();
Reader reader = readerData.ToEntity();
readerRepository.Add(reader);
ctx.Commit();
}
return(true);
}
catch
{
return(false);
}
}
//
//public List<T> ReaderFile<T>()
public List <T> ReaderFile <T>(ReaderData <T> readerData)
{
FileStream file = null;
StreamReader reader = null;
List <T> list = new List <T>();
try
{
var path = HttpContext.Current.Server.MapPath(ConfigurationManager.AppSettings["path"].ToString());
file = new FileStream(path, FileMode.Open);
reader = new StreamReader(file);
string line;
while ((line = reader.ReadLine()) != null)
{
var item = readerData(line);
if (null != item)
{
list.Add(readerData(line));
}
Console.WriteLine(line); // Write to console.
}
}
catch (Exception ex)
{
}
finally
{
if (null != reader)
{
reader.Close();
reader.Dispose();
}
if (null != file)
{
file.Close();
file.Dispose();
}
}
return(list);
}
/// <summary>
/// Stop reading and disable/close the reader.
/// </summary>
public void TermReader()
{
// If we have a reader
if (myReader != null)
{
try
{
// stop all the notifications.
StopRead();
//Detach all the notification handler if the user has not done it already.
DetachReadNotify();
DetachStatusNotify();
// Disable the reader.
myReader.Actions.Disable();
// Free it up.
myReader.Dispose();
// Make the reference null.
myReader = null;
}
catch {}
}
// After disposing the reader, dispose the reader data.
if (myReaderData != null)
{
try
{
// Free it up.
myReaderData.Dispose();
// Make the reference null.
myReaderData = null;
}
catch {}
}
}
/// <summary>
/// Initialize the reader.
/// </summary>
private void InitReader()
{
// If reader is already present, fail.
if (MyReader != null)
{
return;
}
MyReader = new Symbol.Barcode.Reader();
if (MyReader == null)
{
throw new SymbolRFGunException("Unable to initialize reader");
}
// Create reader data.
MyReaderData = new Symbol.Barcode.ReaderData(
Symbol.Barcode.ReaderDataTypes.Text,
Symbol.Barcode.ReaderDataLengths.DefaultText);
if (MyReaderData == null)
{
throw new SymbolRFGunException("Unable to initialize reader data");
}
// Create event handler delegate.
MyEventHandler = new EventHandler(MyReader_ReadNotify);
if (MyEventHandler == null)
{
throw new SymbolRFGunException("Unable to initialize event handler for reader");
}
// Enable reader.
MyReader.Actions.Enable();
// Handle success and failure sounds manually.
MyReader.Parameters.Feedback.Success.BeepTime = 0;
// Start reader.
StartRead();
}
private void barcode1_OnRead(object sender, ReaderData readerData)
{
string s;
if (readerData.Text.Length == 12)
{
s = "0" + readerData.Text;
}
else if (readerData.Text.Length == 14)
{
s = readerData.Text.Substring(1);
}
else if (readerData.Text.Length == 13)
{
s = readerData.Text;
}
else
{
s = "";
}
OnReadBarCode(s, readerData.Text);
}
/// <summary>
/// Open the scanner device
/// </summary>
public void Open()
{
if (scannerStatus == ScannerStatus.Opened)
{
return;
}
try
{
reader = new Reader();
readerData = new ReaderData(ReaderDataTypes.Text, ReaderDataLengths.MaximumLabel);
reader.Actions.Enable();
StartRead();
scannerStatus = ScannerStatus.Opened;
}
catch
{
Close();
throw;
}
}
/// <summary>
/// Terminates the Symbol scanner.
/// </summary>
public override void Terminate()
{
// If we have a scanner
if (symbolReader != null)
{
// Disable the scanner
symbolReader.Actions.Disable();
// Free it up
symbolReader.Dispose();
// Indicate we no longer have one
symbolReader = null;
}
// If we have a scanner data object
if (symbolReaderData != null)
{
// Free it up
symbolReaderData.Dispose();
// Indicate we no longer have one
symbolReaderData = null;
}
if (xSymKeyPad != null)
{
xSymKeyPad.AlphaNotify -= ALPNotify;
xSymKeyPad.KeyStateNotify -= Sym48_KeyStateNotify;
xSymKeyPad.Dispose();
}
if (xWLan != null)
{
xWLan.Dispose();
}
//if (xRadio != null)
// xRadio.Dispose();
}
private IndexReader ReplaceActiveReader(IndexReader outOfDateReader, object directoryProviderLock,
IDirectoryProvider directoryProvider, IndexReader[] readers)
{
bool trace = log.IsInfoEnabled;
IndexReader oldReader;
bool closeOldReader = false;
bool closeOutOfDateReader = false;
IndexReader reader;
/**
* Since out of lock protection, can have multiple readers created in //
* not worse than NotShared and limit the locking time, hence scalability
*/
try
{
reader = IndexReader.Open(directoryProvider.Directory);
}
catch (IOException e)
{
throw new SearchException("Unable to open Lucene IndexReader", e);
}
lock (directoryProviderLock)
{
// Since not protected by a lock, other ones can have been added
oldReader = activeSearchIndexReaders[directoryProvider] = reader;
lock (semaphoreIndexReaderLock)
{
searchIndexReaderSemaphores[reader] = new ReaderData(1, directoryProvider);
if (trace) log.Info("Semaphore: 1 for " + reader);
if (outOfDateReader != null)
{
ReaderData readerData;
searchIndexReaderSemaphores.TryGetValue(outOfDateReader, out readerData);
if (readerData == null)
{
closeOutOfDateReader = false; //already removed by another prevous thread
}
else if (readerData.Semaphore == 0)
{
searchIndexReaderSemaphores.Remove(outOfDateReader);
closeOutOfDateReader = true;
}
else
{
closeOutOfDateReader = false;
}
}
if (oldReader != null && oldReader != outOfDateReader)
{
ReaderData readerData = searchIndexReaderSemaphores[oldReader];
if (readerData == null)
{
log.Warn("Semaphore should not be null");
closeOldReader = true; //TODO should be true or false?
}
else if (readerData.Semaphore == 0)
{
searchIndexReaderSemaphores.Remove(oldReader);
closeOldReader = true;
}
else
{
closeOldReader = false;
}
}
}
}
if (closeOutOfDateReader)
{
if (trace) log.Info("Closing out of date IndexReader " + outOfDateReader);
try
{
outOfDateReader.Close();
}
catch (IOException e)
{
ReaderProviderHelper.Clean(readers);
throw new SearchException("Unable to close Lucene IndexReader", e);
}
}
if (closeOldReader)
{
if (trace) log.Info("Closing old IndexReader " + oldReader);
try
{
oldReader.Close();
}
catch (IOException e)
{
ReaderProviderHelper.Clean(readers);
throw new SearchException("Unable to close Lucene IndexReader", e);
}
}
return reader;
}
public override void Terminate()
{
symbolReader = null;
symbolReaderData = null;
}
public static ReaderData CloneObject(ReaderData rd)
{
var jss = new JavaScriptSerializer();
return(jss.Deserialize <ReaderData>(jss.Serialize(rd)));
}
/// <summary>
/// Event that fires when a Symbol scanner has performed a scan.
/// </summary>
private void symbolReader_ReadNotify(object sender,EventArgs e)
{
ReaderData readerData = symbolReader.GetNextReaderData();
// If it is a successful scan (as opposed to a failed one)
if (readerData.Result == Results.SUCCESS)
{
BCId nType = BCId.NoData;
// Преобразовать Symbol-тип штрихкода к моему
switch (readerData.Type)
{
case DecoderTypes.EAN128:
case DecoderTypes.CODE128:
nType = BCId.Code128;
break;
case DecoderTypes.EAN13:
nType = BCId.EAN13;
break;
case DecoderTypes.EAN8:
nType = BCId.EAN8;
break;
case DecoderTypes.I2OF5:
case DecoderTypes.D2OF5:
case DecoderTypes.IATA2OF5:
case DecoderTypes.CHINESE_2OF5:
nType = BCId.Interleaved25;
break;
case DecoderTypes.IMAGE:
nType = BCId.Image;
break;
case DecoderTypes.CODE11:
nType = BCId.Code11;
break;
case DecoderTypes.CODE39:
nType = BCId.Code39;
break;
case DecoderTypes.RSS14:
case DecoderTypes.RSSEXP:
case DecoderTypes.RSSLIM:
nType = BCId.GS1DataBar;
break;
default:
nType = BCId.Unknown;
break;
}
// Raise scan event to caller (with data)
BarcodeScannerEventArgs xBCA = new BarcodeScannerEventArgs(nType,readerData.Text);
OnBarcodeScan(xBCA);
// Start the next scan
Start();
}
}
public IndexReader OpenReader(IDirectoryProvider[] directoryProviders)
{
bool trace = log.IsInfoEnabled;
int length = directoryProviders.Length;
IndexReader[] readers = new IndexReader[length];
if (trace)
{
log.Info("Opening IndexReader for directoryProviders: " + length);
}
for (int index = 0; index < length; index++)
{
IDirectoryProvider directoryProvider = directoryProviders[index];
IndexReader reader;
object directoryProviderLock = perDirectoryProviderManipulationLocks[directoryProvider];
if (trace)
{
log.Info("Opening IndexReader from " + directoryProvider.Directory);
}
lock (directoryProviderLock)
{
activeSearchIndexReaders.TryGetValue(directoryProvider, out reader);
}
if (reader == null)
{
if (trace)
{
log.Info("No shared IndexReader, opening a new one: " + directoryProvider.Directory);
}
reader = ReplaceActiveReader(null, directoryProviderLock, directoryProvider, readers);
}
else
{
bool isCurrent;
try
{
isCurrent = reader.IsCurrent();
}
catch (IOException e)
{
throw new SearchException("Unable to read current status of Lucene IndexReader", e);
}
if (!isCurrent)
{
if (trace)
{
log.Info("Out of date shared IndexReader found, opening a new one: " +
directoryProvider.Directory);
}
IndexReader outOfDateReader = reader;
reader = ReplaceActiveReader(outOfDateReader, directoryProviderLock, directoryProvider, readers);
}
else
{
if (trace)
{
log.Info("Valid shared IndexReader: " + directoryProvider.Directory);
}
lock (directoryProviderLock)
{
//read the latest active one, the current one could be out of date and closed already
//the latest active is guaranteed to be active because it's protected by the dp lock
reader = activeSearchIndexReaders[directoryProvider];
lock (semaphoreIndexReaderLock)
{
ReaderData readerData = searchIndexReaderSemaphores[reader];
//TODO if readerData is null????
readerData.Semaphore++;
searchIndexReaderSemaphores[reader] = readerData; //not necessary
if (trace)
{
log.Info("Semaphore increased: " + readerData.Semaphore + " for " + reader);
}
}
}
}
}
readers[index] = reader;
}
return(ReaderProviderHelper.BuildMultiReader(length, readers));
}
private IndexReader ReplaceActiveReader(IndexReader outOfDateReader, object directoryProviderLock,
IDirectoryProvider directoryProvider, IndexReader[] readers)
{
bool trace = log.IsInfoEnabled;
IndexReader oldReader;
bool closeOldReader = false;
bool closeOutOfDateReader = false;
IndexReader reader;
/**
* Since out of lock protection, can have multiple readers created in //
* not worse than NotShared and limit the locking time, hence scalability
*/
try
{
reader = IndexReader.Open(directoryProvider.Directory);
}
catch (IOException e)
{
throw new SearchException("Unable to open Lucene IndexReader", e);
}
lock (directoryProviderLock)
{
// Since not protected by a lock, other ones can have been added
oldReader = activeSearchIndexReaders[directoryProvider] = reader;
lock (semaphoreIndexReaderLock)
{
searchIndexReaderSemaphores[reader] = new ReaderData(1, directoryProvider);
if (trace)
{
log.Info("Semaphore: 1 for " + reader);
}
if (outOfDateReader != null)
{
ReaderData readerData;
searchIndexReaderSemaphores.TryGetValue(outOfDateReader, out readerData);
if (readerData == null)
{
closeOutOfDateReader = false; //already removed by another prevous thread
}
else if (readerData.Semaphore == 0)
{
searchIndexReaderSemaphores.Remove(outOfDateReader);
closeOutOfDateReader = true;
}
else
{
closeOutOfDateReader = false;
}
}
if (oldReader != null && oldReader != outOfDateReader)
{
ReaderData readerData = searchIndexReaderSemaphores[oldReader];
if (readerData == null)
{
log.Warn("Semaphore should not be null");
closeOldReader = true; //TODO should be true or false?
}
else if (readerData.Semaphore == 0)
{
searchIndexReaderSemaphores.Remove(oldReader);
closeOldReader = true;
}
else
{
closeOldReader = false;
}
}
}
}
if (closeOutOfDateReader)
{
if (trace)
{
log.Info("Closing out of date IndexReader " + outOfDateReader);
}
try
{
outOfDateReader.Close();
}
catch (IOException e)
{
ReaderProviderHelper.Clean(readers);
throw new SearchException("Unable to close Lucene IndexReader", e);
}
}
if (closeOldReader)
{
if (trace)
{
log.Info("Closing old IndexReader " + oldReader);
}
try
{
oldReader.Close();
}
catch (IOException e)
{
ReaderProviderHelper.Clean(readers);
throw new SearchException("Unable to close Lucene IndexReader", e);
}
}
return(reader);
}
