LogRecordSequence Sınıf

Tanım

İçinde depolanan bir kayıt dizisini temsil eder LogStore .Represents a record sequence stored in a LogStore.

public ref class LogRecordSequence sealed : IDisposable, System::IO::Log::IRecordSequence
public sealed class LogRecordSequence : IDisposable, System.IO.Log.IRecordSequence
type LogRecordSequence = class
    interface IRecordSequence
    interface IDisposable
Public NotInheritable Class LogRecordSequence
Implements IDisposable, IRecordSequence
Devralma
LogRecordSequence
Uygulamalar

Örnekler

Bu örnek, sınıfının nasıl kullanılacağını gösterir LogRecordSequence :This example shows how to use the LogRecordSequence class:

using System;
using System.IO;
using System.Collections.Generic;
using System.Text;
using System.IO.Log;

namespace MyLogRecordSequence
{
    public class MyLog
    {
        string logName = "test.log";
        string logContainer = "MyExtent0";
        int containerSize = 32 * 1024;
        LogRecordSequence sequence = null;
        bool delete = true;

        // These are used in the TailPinned event handler.
        public static LogRecordSequence MySequence = null;
        public static bool AdvanceBase = true;

        public MyLog()
        {
            // Create a LogRecordSequence.
            sequence = new LogRecordSequence(this.logName,
                                              FileMode.CreateNew,
                                              FileAccess.ReadWrite,
                                              FileShare.None);

            // At least one container/extent must be added for Log Record Sequence.
            sequence.LogStore.Extents.Add(this.logContainer, this.containerSize);

            MySequence = sequence;
        }

        public void AddExtents()
        {
            // Add two additional extents. The extents are
            // of the same size as the first extent.
            sequence.LogStore.Extents.Add("MyExtent1");
            sequence.LogStore.Extents.Add("MyExtent2");
        }

        public void EnumerateExtents()
        {
            LogStore store = sequence.LogStore;

            Console.WriteLine("Enumerating Log Extents...");
            Console.WriteLine("    Extent Count: {0} extents", store.Extents.Count);
            Console.WriteLine("    Extents Are...");
            foreach (LogExtent extent in store.Extents)
            {
                Console.WriteLine("      {0} ({1}, {2})",
                                  Path.GetFileName(extent.Path),
                                  extent.Size,
                                  extent.State);
            }
            Console.WriteLine("    Free Extents: {0} Free", store.Extents.FreeCount);
        }

        public void SetLogPolicy()
        {
            Console.WriteLine();
            Console.WriteLine("Setting current log policy...");

            // SET LOG POLICY

            LogPolicy policy = sequence.LogStore.Policy;

            // Set AutoGrow policy. This enables the log to automatically grow
            // when the existing extents are full. New extents are added until
            // we reach the MaximumExtentCount extents.
            // AutoGrow policy is supported only in Windows Vista and not available in R2.

            //policy.AutoGrow = true;

            // Set the Growth Rate in terms of extents. This policy specifies
            // "how much" the log should grow.
            policy.GrowthRate = new PolicyUnit(2, PolicyUnitType.Extents);

            // Set the AutoShrink policy. This enables the log to automatically
            // shrink if the available free space exceeds the shrink percentage.
            // AutoGrow/shrink policy is supported only in Windows Vista and not available in R2.

            //policy.AutoShrinkPercentage = new PolicyUnit(30, PolicyUnitType.Percentage);

            // Set the PinnedTailThreshold policy.
            // A tail pinned event is triggered when there is no
            // log space available and log space may be freed by advancing the base.
            // The user must handle the tail pinned event by advancing the base of the log.
            // If the user is not able to move the base of the log, the user should report with exception in
            // the tail pinned handler.
            // PinnedTailThreashold policy dictates the amount of space that the TailPinned event requests
            // for advancing the base of the log. The amount of space can be in percentage or in terms of bytes
            // which is rounded off to the nearest containers in CLFS. The default is 35 percent.

            policy.PinnedTailThreshold = new PolicyUnit(10, PolicyUnitType.Percentage);

            // Set the maximum extents the log can have.
            policy.MaximumExtentCount = 6;

            // Set the minimum extents the log can have.
            policy.MinimumExtentCount = 2;

            // Set the prefix for new containers that are added.
            // when AutoGrow is enabled.
            //policy.NewExtentPrefix = "MyLogPrefix";

            // Set the suffix number for new containers that are added.
            // when AutoGrow is enabled.
            policy.NextExtentSuffix = 3;

            // Commit the log policy.
            policy.Commit();

            // Refresh updates the IO.Log policy properties with current log policy
            // set in the log.
            policy.Refresh();

            // LOG POLICY END
            //

            //+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
            // Setting up IO.Log provided capabilities...
            //

            // SET RETRY APPEND

            // IO.Log provides a mechanism similar to AutoGrow.
            // If the existing log is full and an append fails, setting RetryAppend
            // invokes the CLFS policy engine to add new extents and re-tries
            // record appends. If MaximumExtent count has been reached,
            // a SequenceFullException is thrown.
            //

            sequence.RetryAppend = true;

            // RETRY APPEND END

            // REGISTER FOR TAILPINNED EVENT NOTIFICATIONS

            // Register for TailPinned Event by passing in an event handler.
            // An event is raised when the log full condition is reached.
            // The user should either advance the base sequence number to the
            // nearest valid sequence number recommended in the tail pinned event or
            // report a failure that it is not able to advance the base sequence
            // number.
            //

            sequence.TailPinned += new EventHandler<TailPinnedEventArgs>(HandleTailPinned);

            Console.WriteLine("Done...");
        }

        public void ShowLogPolicy()
        {
            Console.WriteLine();
            Console.WriteLine("Showing current log policy...");

            LogPolicy policy = sequence.LogStore.Policy;

            Console.WriteLine("    Minimum extent count:  {0}", policy.MinimumExtentCount);
            Console.WriteLine("    Maximum extent count:  {0}", policy.MaximumExtentCount);
            Console.WriteLine("    Growth rate:           {0}", policy.GrowthRate);
            Console.WriteLine("    Pinned tail threshold: {0}", policy.PinnedTailThreshold);
            Console.WriteLine("    Auto shrink percent:   {0}", policy.AutoShrinkPercentage);
            Console.WriteLine("    Auto grow enabled:     {0}", policy.AutoGrow);
            Console.WriteLine("    New extent prefix:     {0}", policy.NewExtentPrefix);
            Console.WriteLine("    Next extent suffix:    {0}", policy.NextExtentSuffix);
    }

        // Append records. Appending three records.
        public void AppendRecords()
        {
            Console.WriteLine("Appending Log Records...");
            SequenceNumber previous = SequenceNumber.Invalid;

            previous = sequence.Append(CreateData("Hello World!"), SequenceNumber.Invalid, SequenceNumber.Invalid, RecordAppendOptions.ForceFlush);
            previous = sequence.Append(CreateData("This is my first Logging App"), SequenceNumber.Invalid, SequenceNumber.Invalid, RecordAppendOptions.ForceFlush);
            previous = sequence.Append(CreateData("Using LogRecordSequence..."), SequenceNumber.Invalid, SequenceNumber.Invalid, RecordAppendOptions.ForceFlush);
    
            Console.WriteLine("Done...");
        }

        // Read the records added to the log.
        public void ReadRecords()
        {
            Encoding enc = Encoding.Unicode;

            Console.WriteLine();

            Console.WriteLine("Reading Log Records...");
            try
            {
                foreach (LogRecord record in this.sequence.ReadLogRecords(this.sequence.BaseSequenceNumber, LogRecordEnumeratorType.Next))
                {
                    byte[] data = new byte[record.Data.Length];
                    record.Data.Read(data, 0, (int)record.Data.Length);
                    string mystr = enc.GetString(data);
                    Console.WriteLine("    {0}", mystr);
                }
            }
            catch (Exception e)
            {
                Console.WriteLine("Exception {0} {1}", e.GetType(), e.Message);
            }

            Console.WriteLine();
        }

        public void FillLog()
        {
            bool append = true;

            while (append)
            {
                try
                {
                    sequence.Append(CreateData(16 * 1024), SequenceNumber.Invalid, SequenceNumber.Invalid, RecordAppendOptions.ForceFlush);
                }

                catch (SequenceFullException)
                {
                    Console.WriteLine("Log is Full...");
                    append = false;
                }
            }
        }

        // Dispose the record sequence and delete the log file.
        public void Cleanup()
        {
            // Dispose the sequence
            sequence.Dispose();

            // Delete the log file.
            if (delete)
            {
                try
                {
                    // This deletes the base log file and all the extents associated with the log.
                    LogStore.Delete(this.logName);
                }
                catch (Exception e)
                {
                    Console.WriteLine("Exception {0} {1}", e.GetType(), e.Message);
                }
            }
        }

        // Converts the given data to an Array of ArraySegment<byte>
        public static IList<ArraySegment<byte>> CreateData(string str)
        {
            Encoding enc = Encoding.Unicode;

            byte[] array = enc.GetBytes(str);

            ArraySegment<byte>[] segments = new ArraySegment<byte>[1];
            segments[0] = new ArraySegment<byte>(array);

            return Array.AsReadOnly<ArraySegment<byte>>(segments);
        }

        public static IList<ArraySegment<byte>> CreateData(int size)
        {
            byte[] array = new byte[size];

            Random rnd = new Random();
            rnd.NextBytes(array);

            ArraySegment<byte>[] segments = new ArraySegment<byte>[1];
            segments[0] = new ArraySegment<byte>(array);

            return Array.AsReadOnly<ArraySegment<byte>>(segments);
        }

        public static SequenceNumber GetAdvanceBaseSeqNumber(SequenceNumber recTargetSeqNum)
        {
            SequenceNumber targetSequenceNumber = SequenceNumber.Invalid;

            Console.WriteLine("Getting actual target sequence number...");

            //
            // Implement the logic for returning a valid sequence number closer to
            // recommended target sequence number.
            //

            return targetSequenceNumber;
        }

        public static void HandleTailPinned(object arg, TailPinnedEventArgs tailPinnedEventArgs)
        {
            Console.WriteLine("TailPinned has fired");

            // Based on the implementation of a logging application, the log base can be moved
            // to free up more log space and if it is not possible to move the
            // base, the application should report by throwing an exception.

            if(MyLog.AdvanceBase)
            {
                try
                {
                    // TailPnnedEventArgs has the recommended sequence number and its generated
                    // based on PinnedTailThreshold policy.
                    // This does not map to an actual sequence number in the record sequence
                    // but an approximation and potentially frees up the threshold % log space
                    // when the log base is advanced to a valid sequence number closer to the
                    // recommended sequence number.
                    // The user should use this sequence number to locate a closest valid sequence
                    // number to advance the base of the log.

                    SequenceNumber recommendedTargetSeqNum = tailPinnedEventArgs.TargetSequenceNumber;

                    // Get the actual Target sequence number.
                    SequenceNumber actualTargetSeqNum = MyLog.GetAdvanceBaseSeqNumber(recommendedTargetSeqNum);

                    MySequence.AdvanceBaseSequenceNumber(actualTargetSeqNum);
                }
                catch (Exception e)
                {
                    Console.WriteLine("Exception thrown {0} {1}", e.GetType(), e.Message);
                }
            }
            else
            {
                // Report back Error if under some conditions the log cannot
                // advance the base sequence number.

                Console.WriteLine("Reporting Error! Unable to move the base sequence number!");
                throw new IOException();
            }
        }
    }

    class LogSample
    {
        static void Main(string[] args)
        {
            // Create log record sequence.
            MyLog log = new MyLog();

            // Add additional extents.
            log.AddExtents();

            // Enumerate the current log extents.
            log.EnumerateExtents();

            // Set log policies and register for TailPinned event notifications.
            log.SetLogPolicy();

            log.ShowLogPolicy();

            // Append a few records and read the appended records.
            log.AppendRecords();
            log.ReadRecords();

            // Fill the Log to trigger log growth...and subsequent TailPinned notifications.
            log.FillLog();

            log.EnumerateExtents();

            log.Cleanup();
        }
    }
}


Imports System.IO
Imports System.Collections.Generic
Imports System.Text
Imports System.IO.Log

Namespace MyLogRecordSequence
    Public Class MyLog
        Private logName As String = "test.log"
        Private logContainer As String = "MyExtent0"
        Private containerSize As Integer = 32 * 1024
        Private sequence As LogRecordSequence = Nothing
        Private delete As Boolean = True

        ' These are used in the TailPinned event handler.
        Public Shared MySequence As LogRecordSequence = Nothing
        Public Shared AdvanceBase As Boolean = True

        Public Sub New()
            ' Create a LogRecordSequence.
            sequence = New LogRecordSequence(Me.logName, FileMode.CreateNew, FileAccess.ReadWrite, FileShare.None)

            ' At least one container/extent must be added for Log Record Sequence.
            sequence.LogStore.Extents.Add(Me.logContainer, Me.containerSize)

            MySequence = sequence

        End Sub

        Public Sub AddExtents()
            ' Add two additional extents. The extents are 
            ' of the same size as the first extent.
            sequence.LogStore.Extents.Add("MyExtent1")
            sequence.LogStore.Extents.Add("MyExtent2")
        End Sub

        Public Sub EnumerateExtents()
            Dim store As LogStore = sequence.LogStore

            Console.WriteLine("Enumerating Log Extents...")
            Console.WriteLine("    Extent Count: {0} extents", store.Extents.Count)
            Console.WriteLine("    Extents Are...")
            For Each extent In store.Extents
                Console.WriteLine("      {0} ({1}, {2})", Path.GetFileName(extent.Path), extent.Size, extent.State)
            Next extent
            Console.WriteLine("    Free Extents: {0} Free", store.Extents.FreeCount)
        End Sub

        Public Sub SetLogPolicy()
            Console.WriteLine()
            Console.WriteLine("Setting current log policy...")

            ' SET LOG POLICY

            Dim policy As LogPolicy = sequence.LogStore.Policy

            ' Set AutoGrow policy. This enables the log to automatically grow
            ' when the existing extents are full. New extents are added until
            ' we reach the MaximumExtentCount extents.
            ' AutoGrow policy is supported only in Windows Vista and not available in R2.

            'policy.AutoGrow = true;

            ' Set the Growth Rate in terms of extents. This policy specifies
            ' "how much" the log should grow. 
            policy.GrowthRate = New PolicyUnit(2, PolicyUnitType.Extents)

            ' Set the AutoShrink policy. This enables the log to automatically
            ' shrink if the available free space exceeds the shrink percentage. 
            ' AutoGrow/shrink policy is supported only in Windows Vista and not available in R2.

            'policy.AutoShrinkPercentage = new PolicyUnit(30, PolicyUnitType.Percentage);

            ' Set the PinnedTailThreshold policy.
            ' A tail pinned event is triggered when there is no
            ' log space available and log space may be freed by advancing the base.
            ' The user must handle the tail pinned event by advancing the base of the log. 
            ' If the user is not able to move the base of the log, the user should report with exception in
            ' the tail pinned handler.
            ' PinnedTailThreashold policy dictates the amount of space that the TailPinned event requests 
            ' for advancing the base of the log. The amount of space can be in percentage or in terms of bytes 
            ' which is rounded off to the nearest containers in CLFS. The default is 35 percent.


            policy.PinnedTailThreshold = New PolicyUnit(10, PolicyUnitType.Percentage)

            ' Set the maximum extents the log can have.
            policy.MaximumExtentCount = 6

            ' Set the minimum extents the log can have.
            policy.MinimumExtentCount = 2

            ' Set the prefix for new containers that are added. 
            ' when AutoGrow is enabled.
            'policy.NewExtentPrefix = "MyLogPrefix";

            ' Set the suffix number for new containers that are added.
            ' when AutoGrow is enabled. 
            policy.NextExtentSuffix = 3

            ' Commit the log policy.
            policy.Commit()

            ' Refresh updates the IO.Log policy properties with current log policy 
            ' set in the log. 
            policy.Refresh()

            ' LOG POLICY END
            ' 

            '+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
            ' Setting up IO.Log provided capabilities...
            ' 

            ' SET RETRY APPEND

            ' IO.Log provides a mechanism similar to AutoGrow.
            ' If the existing log is full and an append fails, setting RetryAppend
            ' invokes the CLFS policy engine to add new extents and re-tries
            ' record appends. If MaximumExtent count has been reached, 
            ' a SequenceFullException is thrown. 
            ' 

            sequence.RetryAppend = True

            ' RETRY APPEND END

            ' REGISTER FOR TAILPINNED EVENT NOTIFICATIONS

            ' Register for TailPinned Event by passing in an event handler.
            ' An event is raised when the log full condition is reached.
            ' The user should either advance the base sequence number to the 
            ' nearest valid sequence number recommended in the tail pinned event or
            ' report a failure that it is not able to advance the base sequence 
            ' number. 
            '

            AddHandler sequence.TailPinned, AddressOf HandleTailPinned

            Console.WriteLine("Done...")
        End Sub

        Public Sub ShowLogPolicy()
            Console.WriteLine()
            Console.WriteLine("Showing current log policy...")

            Dim policy As LogPolicy = sequence.LogStore.Policy

            Console.WriteLine("    Minimum extent count:  {0}", policy.MinimumExtentCount)
            Console.WriteLine("    Maximum extent count:  {0}", policy.MaximumExtentCount)
            Console.WriteLine("    Growth rate:           {0}", policy.GrowthRate)
            Console.WriteLine("    Pinned tail threshold: {0}", policy.PinnedTailThreshold)
            Console.WriteLine("    Auto shrink percent:   {0}", policy.AutoShrinkPercentage)
            Console.WriteLine("    Auto grow enabled:     {0}", policy.AutoGrow)
            Console.WriteLine("    New extent prefix:     {0}", policy.NewExtentPrefix)
            Console.WriteLine("    Next extent suffix:    {0}", policy.NextExtentSuffix)

        End Sub

        ' Append records. Appending three records.  
        Public Sub AppendRecords()
            Console.WriteLine("Appending Log Records...")
            Dim previous As SequenceNumber = SequenceNumber.Invalid

            previous = sequence.Append(CreateData("Hello World!"), SequenceNumber.Invalid, SequenceNumber.Invalid, RecordAppendOptions.ForceFlush)
            previous = sequence.Append(CreateData("This is my first Logging App"), SequenceNumber.Invalid, SequenceNumber.Invalid, RecordAppendOptions.ForceFlush)
            previous = sequence.Append(CreateData("Using LogRecordSequence..."), SequenceNumber.Invalid, SequenceNumber.Invalid, RecordAppendOptions.ForceFlush)

            Console.WriteLine("Done...")
        End Sub


        ' Read the records added to the log. 
        Public Sub ReadRecords()
            Dim enc As Encoding = Encoding.Unicode

            Console.WriteLine()

            Console.WriteLine("Reading Log Records...")
            Try
                For Each record As LogRecord In Me.sequence.ReadLogRecords(Me.sequence.BaseSequenceNumber, LogRecordEnumeratorType.Next)
                    Dim data(record.Data.Length - 1) As Byte
                    record.Data.Read(data, 0, CInt(Fix(record.Data.Length)))
                    Dim mystr As String = enc.GetString(data)
                    Console.WriteLine("    {0}", mystr)
                Next record
            Catch e As Exception
                Console.WriteLine("Exception {0} {1}", e.GetType(), e.Message)
            End Try

            Console.WriteLine()
        End Sub

        Public Sub FillLog()
            Dim append As Boolean = True

            Do While append
                Try
                    sequence.Append(CreateData(16 * 1024), SequenceNumber.Invalid, SequenceNumber.Invalid, RecordAppendOptions.ForceFlush)

                Catch e1 As SequenceFullException
                    Console.WriteLine("Log is Full...")
                    append = False
                End Try
            Loop
        End Sub

        ' Dispose the record sequence and delete the log file. 
        Public Sub Cleanup()
            ' Dispose the sequence
            sequence.Dispose()

            ' Delete the log file.
            If delete Then
                Try
                    ' This deletes the base log file and all the extents associated with the log.
                    LogStore.Delete(Me.logName)
                Catch e As Exception
                    Console.WriteLine("Exception {0} {1}", e.GetType(), e.Message)
                End Try
            End If
        End Sub

        ' Converts the given data to an Array of ArraySegment<byte> 
        Public Shared Function CreateData(ByVal str As String) As IList(Of ArraySegment(Of Byte))
            Dim enc As Encoding = Encoding.Unicode

            Dim array() As Byte = enc.GetBytes(str)

            Dim segments(0) As ArraySegment(Of Byte)
            segments(0) = New ArraySegment(Of Byte)(array)

            Return System.Array.AsReadOnly(Of ArraySegment(Of Byte))(segments)
        End Function

        Public Shared Function CreateData(ByVal size As Integer) As IList(Of ArraySegment(Of Byte))
            Dim array(size - 1) As Byte

            Dim rand As New Random()
            rand.NextBytes(array)

            Dim segments(0) As ArraySegment(Of Byte)
            segments(0) = New ArraySegment(Of Byte)(array)

            Return System.Array.AsReadOnly(Of ArraySegment(Of Byte))(segments)
        End Function

        Public Shared Function GetAdvanceBaseSeqNumber(ByVal recTargetSeqNum As SequenceNumber) As SequenceNumber
            Dim targetSequenceNumber As SequenceNumber = SequenceNumber.Invalid

            Console.WriteLine("Getting actual target sequence number...")

            ' 
            ' Implement the logic for returning a valid sequence number closer to
            ' recommended target sequence number. 
            '

            Return targetSequenceNumber
        End Function

        Public Shared Sub HandleTailPinned(ByVal arg As Object, ByVal tailPinnedEventArgs As TailPinnedEventArgs)
            Console.WriteLine("TailPinned has fired")

            ' Based on the implementation of a logging application, the log base can be moved
            ' to free up more log space and if it is not possible to move the 
            ' base, the application should report by throwing an exception.

            If MyLog.AdvanceBase Then
                Try
                    ' TailPnnedEventArgs has the recommended sequence number and its generated 
                    ' based on PinnedTailThreshold policy. 
                    ' This does not map to an actual sequence number in the record sequence
                    ' but an approximation and potentially frees up the threshold % log space
                    ' when the log base is advanced to a valid sequence number closer to the 
                    ' recommended sequence number. 
                    ' The user should use this sequence number to locate a closest valid sequence
                    ' number to advance the base of the log.

                    Dim recommendedTargetSeqNum As SequenceNumber = tailPinnedEventArgs.TargetSequenceNumber

                    ' Get the actual Target sequence number.
                    Dim actualTargetSeqNum As SequenceNumber = MyLog.GetAdvanceBaseSeqNumber(recommendedTargetSeqNum)

                    MySequence.AdvanceBaseSequenceNumber(actualTargetSeqNum)
                Catch e As Exception
                    Console.WriteLine("Exception thrown {0} {1}", e.GetType(), e.Message)
                End Try
            Else
                ' Report back Error if under some conditions the log cannot
                ' advance the base sequence number.

                Console.WriteLine("Reporting Error! Unable to move the base sequence number!")
                Throw New IOException()
            End If
        End Sub
    End Class

    Friend Class LogSample
        Shared Sub Main(ByVal args() As String)
            ' Create log record sequence.
            Dim log As New MyLog()

            ' Add additional extents.
            log.AddExtents()

            ' Enumerate the current log extents.
            log.EnumerateExtents()

            ' Set log policies and register for TailPinned event notifications. 
            log.SetLogPolicy()

            log.ShowLogPolicy()

            ' Append a few records and read the appended records. 
            log.AppendRecords()
            log.ReadRecords()

            ' Fill the Log to trigger log growth...and subsequent TailPinned notifications.
            log.FillLog()

            log.EnumerateExtents()

            log.Cleanup()
        End Sub
    End Class
End Namespace

Açıklamalar

LogRecordSequenceSınıfı, ortak günlük dosya sistemi (CLFS) günlüğünün üstünde kayıt sırası arabiriminin bir uygulamasını sağlar.The LogRecordSequence class provides an implementation of the record sequence interface on top of a Common Log File System (CLFS) log. Standart kayıt yönelimli özelliklere ek olarak, günlük tam koşulların ve istemcilerin aynı fiziksel dosya üzerinde çoğullama özelliğini önlemenin bir ilke modeli sağlar.In addition to the standard record-oriented features, it provides a policy model for avoiding log-full conditions, and multiplexing of clients on the same physical file. LogStoreBIR CLFS günlük dosyasını doğrudan işlemek ve yönetmek için bir arabirim sağlayan sınıfıyla birlikte kullanılır.It works with the LogStore class, which provides an interface for directly manipulating and managing a CLFS log file. LogStoreSınıfı ve sınıfı arasındaki ilişki, LogRecordSequence bir disk dosyası ile nesne arasındaki ilişkiye benzer FileStream .The relationship between the LogStore class and the LogRecordSequence class is similar to the relationship between a disk file and a FileStream object. Disk dosyası somut depolama alanını sağlar ve uzunluğu ve son erişim zamanı gibi özniteliklere sahiptir; nesne, FileStream dosya üzerinde okuma ve yazma için kullanılabilecek bir görünüm sağlar.The disk file provides the concrete storage, and has attributes such as length and last access time; while the FileStream object provides a view on the file that can be used to read from it and write to it. Benzer şekilde, LogStore sınıfın bir ilke ve disk kapsamları koleksiyonu gibi öznitelikleri vardır ve LogRecordSequence sınıfı, verileri okumak ve yazmak için kayda dayalı bir mekanizma sağlar.Similarly, the LogStore class has attributes like a policy and a collection of disk extents; and the LogRecordSequence class provides a record-oriented mechanism for reading and writing data.

Oluşturucular

LogRecordSequence(LogStore)

LogRecordSequenceBelirtilen günlük deposuyla sınıfının yeni bir örneğini başlatır.Initializes a new instance of the LogRecordSequence class with the specified log store.

LogRecordSequence(LogStore, Int32, Int32)

LogRecordSequenceBelirtilen günlük deposu, her bir kayıt için arabellek boyutu ve arabellek numarası ile sınıfın yeni bir örneğini başlatır.Initializes a new instance of the LogRecordSequence class with the specified log store, buffer size for each record, and buffer number.

LogRecordSequence(String, FileMode)

Bir sınıfın yeni bir örneğini LogRecordSequence Günlük deposu ve erişim modu için belirtilen bir yol ile başlatır.Initializes a new instance of the LogRecordSequence class with a specified path to the log store and the access mode.

LogRecordSequence(String, FileMode, FileAccess)

LogRecordSequenceGünlük depolama ve erişim ve paylaşma modlarında belirtilen bir yol ile sınıfın yeni bir örneğini başlatır.Initializes a new instance of the LogRecordSequence class with a specified path to the log store and the access and share modes.

LogRecordSequence(String, FileMode, FileAccess, FileShare)

Bir sınıfın yeni bir örneğini LogRecordSequence Günlük deposu ve erişim modu için belirtilen bir yol ile başlatır.Initializes a new instance of the LogRecordSequence class with a specified path to the log store and the access mode.

LogRecordSequence(String, FileMode, FileAccess, FileShare, Int32, Int32)

LogRecordSequenceGünlük depolama, dosya izni, erişim ve paylaşma modları ve kayıt için arabellek boyutu ve sayım için belirtilen bir yol ile sınıfın yeni bir örneğini başlatır.Initializes a new instance of the LogRecordSequence class with a specified path to the log store, file permission, access and share modes, and the buffer size and count for records.

LogRecordSequence(String, FileMode, FileAccess, FileShare, Int32, Int32, FileSecurity)

LogRecordSequence sınıfının yeni bir örneğini başlatır.Initializes a new instance of the LogRecordSequence class.

Özellikler

BaseSequenceNumber

Geçerli olan ilk geçerli kaydın sıra numarasını alır LogRecordSequence .Gets the sequence number of the first valid record in the current LogRecordSequence.

LastSequenceNumber

Eklenen son kayıttan daha büyük olan sıra numarasını alır.Gets the sequence number which is greater than the last record appended.

LogStore

LogStoreBu kayıt sırası için verileri içeren öğesini alır.Gets the LogStore that contains the data for this record sequence. Bu yöntem devralınamaz.This method cannot be inherited.

MaximumRecordLength

Bu kayıt dizisine eklenebilecek en büyük bir kayıt boyutunu alır.Gets the maximum size of a record that can be added to this record sequence.

ReservedBytes

Ayrılan toplam bayt sayısını alır.Gets the total number of bytes that have been reserved.

RestartSequenceNumber

Günlüğün sonuna en yakın yeniden başlatma alanının sıra numarasını alır.Gets the sequence number of the restart area closest to the end of the log.

RetryAppend

Günlük dolduğunda ekleme işleminin otomatik olarak yeniden denenip denenmediğini gösteren bir değer alır veya ayarlar.Gets or sets a value indicating whether or not appends are automatically retried if the log is full.

Yöntemler

AdvanceBaseSequenceNumber(SequenceNumber)

Günlüğün taban sıra numarasını ileri kaydırır.Moves the base sequence number of the log forward. Bu yöntem devralınamaz.This method cannot be inherited.

Append(ArraySegment<Byte>, SequenceNumber, SequenceNumber, RecordAppendOptions)

Bir günlük kaydını öğesine yazar LogRecordSequence .Writes a log record to the LogRecordSequence. Bu yöntem devralınamaz.This method cannot be inherited.

Append(ArraySegment<Byte>, SequenceNumber, SequenceNumber, RecordAppendOptions, ReservationCollection)

IRecordSequenceDizide daha önce ayrılmış alanı kullanarak bir günlük kaydı ekler.Appends a log record to the IRecordSequence, using space previously reserved in the sequence. Bu yöntem devralınamaz.This method cannot be inherited.

Append(IList<ArraySegment<Byte>>, SequenceNumber, SequenceNumber, RecordAppendOptions)

Bir günlük kaydını öğesine ekler IRecordSequence .Appends a log record to the IRecordSequence. Bu yöntem devralınamaz.This method cannot be inherited.

Append(IList<ArraySegment<Byte>>, SequenceNumber, SequenceNumber, RecordAppendOptions, ReservationCollection)

IRecordSequenceDizide daha önce ayrılmış alanı kullanarak bir günlük kaydı ekler.Appends a log record to the IRecordSequence, using space previously reserved in the sequence. Bu yöntem devralınamaz.This method cannot be inherited.

BeginAppend(ArraySegment<Byte>, SequenceNumber, SequenceNumber, RecordAppendOptions, AsyncCallback, Object)

Zaman uyumsuz bir ekleme işlemi başlatır.Begins an asynchronous append operation. Bu yöntem devralınamaz.This method cannot be inherited.

BeginAppend(ArraySegment<Byte>, SequenceNumber, SequenceNumber, RecordAppendOptions, ReservationCollection, AsyncCallback, Object)

Zaman uyumsuz bir ekleme işlemi başlatır.Begins an asynchronous append operation. Bu yöntem devralınamaz.This method cannot be inherited.

BeginAppend(IList<ArraySegment<Byte>>, SequenceNumber, SequenceNumber, RecordAppendOptions, AsyncCallback, Object)

Zaman uyumsuz bir ekleme işlemi başlatır.Begins an asynchronous append operation. Bu yöntem devralınamaz.This method cannot be inherited.

BeginAppend(IList<ArraySegment<Byte>>, SequenceNumber, SequenceNumber, RecordAppendOptions, ReservationCollection, AsyncCallback, Object)

Zaman uyumsuz bir ekleme işlemi başlatır.Begins an asynchronous append operation. Bu yöntem devralınamaz.This method cannot be inherited.

BeginFlush(SequenceNumber, AsyncCallback, Object)

Dizide daha önce ayrılmış alanı kullanarak zaman uyumsuz temizleme işlemi başlatır.Begins an asynchronous flush operation, using space previously reserved in the sequence. Bu yöntem devralınamaz.This method cannot be inherited.

BeginReserveAndAppend(ArraySegment<Byte>, SequenceNumber, SequenceNumber, RecordAppendOptions, ReservationCollection, Int64[], AsyncCallback, Object)

Zaman uyumsuz bir Reserve ve ekleme işlemi başlatır.Begins an asynchronous reserve and append operation. Bu yöntem devralınamaz.This method cannot be inherited.

BeginReserveAndAppend(IList<ArraySegment<Byte>>, SequenceNumber, SequenceNumber, RecordAppendOptions, ReservationCollection, Int64[], AsyncCallback, Object)

Zaman uyumsuz bir Reserve ve ekleme işlemi başlatır.Begins an asynchronous reserve and append operation. Bu yöntem devralınamaz.This method cannot be inherited.

BeginWriteRestartArea(ArraySegment<Byte>, SequenceNumber, ReservationCollection, AsyncCallback, Object)

Dizide daha önce ayrılmış alanı kullanan zaman uyumsuz yeniden başlatma alanı yazma işlemini başlatır.Begins an asynchronous restart area write operation, using space previously reserved in the sequence. Bu yöntem devralınamaz.This method cannot be inherited.

BeginWriteRestartArea(IList<ArraySegment<Byte>>, SequenceNumber, ReservationCollection, AsyncCallback, Object)

Dizide daha önce ayrılmış alanı kullanan zaman uyumsuz yeniden başlatma alanı yazma işlemini başlatır.Begins an asynchronous restart area write operation, using space previously reserved in the sequence. Bu yöntem devralınamaz.This method cannot be inherited.

CreateReservationCollection()

Yeni bir ReservationCollection oluşturur.Creates a new ReservationCollection. Bu yöntem devralınamaz.This method cannot be inherited.

Dispose()

Bileşen tarafından kullanılan kaynakları serbest bırakır.Releases the resources used by the component.

EndAppend(IAsyncResult)

Zaman uyumsuz bir ekleme işlemini sonlandırır.Ends an asynchronous append operation. Bu yöntem devralınamaz.This method cannot be inherited.

EndFlush(IAsyncResult)

Zaman uyumsuz temizleme işlemini sonlandırır.Ends an asynchronous flush operation. Bu yöntem devralınamaz.This method cannot be inherited.

EndReserveAndAppend(IAsyncResult)

Zaman uyumsuz bir Reserve ve ekleme işlemini sonlandırır.Ends an asynchronous reserve and append operation. Bu yöntem devralınamaz.This method cannot be inherited.

EndWriteRestartArea(IAsyncResult)

Zaman uyumsuz yeniden başlatma alanı yazma işlemini sonlandırır.Ends an asynchronous restart area write operation. Bu yöntem devralınamaz.This method cannot be inherited.

Equals(Object)

Belirtilen nesnenin geçerli nesneye eşit olup olmadığını belirler.Determines whether the specified object is equal to the current object.

(Devralındığı yer: Object)
Flush()

Tüm eklenen kayıtların yazıldığından emin olmanızı sağlar.Ensures that all appended records have been written. Bu yöntem devralınamaz.This method cannot be inherited.

Flush(SequenceNumber)

Belirtilen sıra numarasına sahip olan ve kayıt dahil tüm eklenmiş kayıtların durarak yazıldığını sağlar.Ensures that all appended records up to and including the record with the specified sequence number have been durably written. Bu yöntem devralınamaz.This method cannot be inherited.

GetHashCode()

Varsayılan karma işlevi olarak işlev görür.Serves as the default hash function.

(Devralındığı yer: Object)
GetType()

TypeGeçerli örneği alır.Gets the Type of the current instance.

(Devralındığı yer: Object)
MemberwiseClone()

Geçerli bir basit kopyasını oluşturur Object .Creates a shallow copy of the current Object.

(Devralındığı yer: Object)
ReadLogRecords(SequenceNumber, LogRecordEnumeratorType)

Dizideki kayıtların sıralanabilir bir koleksiyonunu döndürür.Returns an enumerable collection of records in the sequence. Bu yöntem devralınamaz.This method cannot be inherited.

ReadRestartAreas()

Dizideki yeniden başlatma alanlarının sıralanabilir bir koleksiyonunu döndürür.Returns an enumerable collection of the restart areas in the sequence. Bu yöntem devralınamaz.This method cannot be inherited.

ReserveAndAppend(ArraySegment<Byte>, SequenceNumber, SequenceNumber, RecordAppendOptions, ReservationCollection, Int64[])

Otomatik olarak tek bir ayırma yapar ve diziye bir kayıt ekler.Automatically makes a single reservation and appends a record to the sequence. Bu yöntem devralınamaz.This method cannot be inherited.

ReserveAndAppend(IList<ArraySegment<Byte>>, SequenceNumber, SequenceNumber, RecordAppendOptions, ReservationCollection, Int64[])

Otomatik olarak tek bir ayırma yapar ve diziye bir kayıt ekler.Automatically makes a single reservation and appends a record to the sequence. Bu yöntem devralınamaz.This method cannot be inherited.

SetLastRecord(SequenceNumber)

İçindeki son kaydı ayarlar LogRecordSequence .Sets the last record in the LogRecordSequence.

ToString()

Geçerli nesneyi temsil eden dizeyi döndürür.Returns a string that represents the current object.

(Devralındığı yer: Object)
WriteRestartArea(ArraySegment<Byte>)

' A yeniden başlatma alanı Yazar LogRecordSequence .Writes a restart area to the LogRecordSequence. Bu yöntem devralınamaz.This method cannot be inherited.

WriteRestartArea(ArraySegment<Byte>, SequenceNumber)

' A bir yeniden başlatma alanı Yazar LogRecordSequence ve temel sıra numarasını güncelleştirir.Writes a restart area to the LogRecordSequence and updates the base sequence number. Bu yöntem devralınamaz.This method cannot be inherited.

WriteRestartArea(ArraySegment<Byte>, SequenceNumber, ReservationCollection)

Ayırmayı kullanarak bir yeniden başlatma alanı Yazar LogRecordSequence ve temel sıra numarasını güncelleştirir.Writes a restart area to the LogRecordSequence using a reservation, and updates the base sequence number. Bu yöntem devralınamaz.This method cannot be inherited.

WriteRestartArea(IList<ArraySegment<Byte>>)

' A yeniden başlatma alanı Yazar LogRecordSequence .Writes a restart area to the LogRecordSequence. Bu yöntem devralınamaz.This method cannot be inherited.

WriteRestartArea(IList<ArraySegment<Byte>>, SequenceNumber)

' A bir yeniden başlatma alanı Yazar LogRecordSequence ve temel sıra numarasını güncelleştirir.Writes a restart area to the LogRecordSequence and updates the base sequence number. Bu yöntem devralınamaz.This method cannot be inherited.

WriteRestartArea(IList<ArraySegment<Byte>>, SequenceNumber, ReservationCollection)

Ayırmayı kullanarak bir yeniden başlatma alanı Yazar LogRecordSequence ve temel sıra numarasını güncelleştirir.Writes a restart area to the LogRecordSequence using a reservation, and updates the base sequence number. Bu yöntem devralınamaz.This method cannot be inherited.

Ekinlikler

TailPinned

Dizinin kuyruğunu taşıma ihtiyacını bildirir.Signals the need to move the tail of the sequence.

Şunlara uygulanır