LogRecordSequence Třída

Definice

Obor názvů:

System.IO.Log

Sestavení:

System.IO.Log.dll

Představuje sekvenci záznamů uloženou v objektu 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

Dědičnost

Object

LogRecordSequence

Implementuje

IDisposable IRecordSequence

Příklady

Tento příklad ukazuje, jak používat LogRecordSequence třídu :

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

Poznámky

Třída LogRecordSequence poskytuje implementaci rozhraní pořadí záznamů nad protokolem CLFS (Common Log File System). Kromě standardních funkcí orientovaných na záznamy poskytuje model zásad pro zabránění podmínkám plného protokolování a multiplexování klientů ve stejném fyzickém souboru. Funguje s LogStore třídou , která poskytuje rozhraní pro přímou manipulaci se souborem protokolu CLFS a jeho správu. Relace mezi LogStore třídou a LogRecordSequence třídou je podobná relaci mezi diskovým souborem a objektem FileStream . Soubor disku poskytuje konkrétní úložiště a má atributy, jako je délka a čas posledního přístupu; FileStream zatímco objekt poskytuje pohled na soubor, který lze použít ke čtení a zápisu do něj. Podobně má třída atributy, LogStore jako je zásada a kolekce diskových rozsahů; a LogRecordSequence třída poskytuje mechanismus orientovaný na záznamy pro čtení a zápis dat.

Konstruktory

LogRecordSequence(LogStore)	Inicializuje novou instanci LogRecordSequence třídy se zadaným úložištěm protokolů.
LogRecordSequence(LogStore, Int32, Int32)	Inicializuje novou instanci LogRecordSequence třídy se zadaným úložištěm protokolů, velikostí vyrovnávací paměti pro každý záznam a číslem vyrovnávací paměti.
LogRecordSequence(String, FileMode)	Inicializuje novou instanci LogRecordSequence třídy se zadanou cestou k úložišti protokolů a režimu přístupu.
LogRecordSequence(String, FileMode, FileAccess)	Inicializuje novou instanci LogRecordSequence třídy se zadanou cestou k úložišti protokolů a režimy přístupu a sdílení.
LogRecordSequence(String, FileMode, FileAccess, FileShare)	Inicializuje novou instanci LogRecordSequence třídy se zadanou cestou k úložišti protokolů a režimu přístupu.
LogRecordSequence(String, FileMode, FileAccess, FileShare, Int32, Int32)	Inicializuje novou instanci LogRecordSequence třídy se zadanou cestou k úložišti protokolů, oprávnění k souboru, režimy přístupu a sdílení a velikost vyrovnávací paměti a počet záznamů.
LogRecordSequence(String, FileMode, FileAccess, FileShare, Int32, Int32, FileSecurity)	Inicializuje novou instanci LogRecordSequence třídy .

Vlastnosti

BaseSequenceNumber	Získá pořadové číslo prvního platného záznamu v aktuálním LogRecordSequence.
LastSequenceNumber	Získá pořadové číslo, které je větší než poslední připojený záznam.
LogStore	Získá , LogStore který obsahuje data pro tuto posloupnost záznamů. Tuto metodu nelze dědit.
MaximumRecordLength	Získá maximální velikost záznamu, který lze přidat do této sekvence záznamů.
ReservedBytes	Získá celkový počet bajtů, které byly rezervovány.
RestartSequenceNumber	Získá pořadové číslo oblasti restartování nejblíže ke konci protokolu.
RetryAppend	Získá nebo nastaví hodnotu označující, zda jsou připojení automaticky opakovat, pokud je protokol plný.

Metody

AdvanceBaseSequenceNumber(SequenceNumber)	Přesune základní pořadové číslo protokolu dopředu. Tuto metodu nelze dědit.
Append(ArraySegment<Byte>, SequenceNumber, SequenceNumber, RecordAppendOptions)	Zapíše záznam protokolu do .LogRecordSequence Tuto metodu nelze dědit.
Append(ArraySegment<Byte>, SequenceNumber, SequenceNumber, RecordAppendOptions, ReservationCollection)	Připojí záznam protokolu k objektu IRecordSequences použitím mezery, které byly dříve v sekvenci vyhrazeny. Tuto metodu nelze dědit.
Append(IList<ArraySegment<Byte>>, SequenceNumber, SequenceNumber, RecordAppendOptions)	Připojí záznam protokolu k objektu IRecordSequence. Tuto metodu nelze dědit.
Append(IList<ArraySegment<Byte>>, SequenceNumber, SequenceNumber, RecordAppendOptions, ReservationCollection)	Připojí záznam protokolu k objektu IRecordSequences použitím mezery, které byly dříve v sekvenci vyhrazeny. Tuto metodu nelze dědit.
BeginAppend(ArraySegment<Byte>, SequenceNumber, SequenceNumber, RecordAppendOptions, AsyncCallback, Object)	Zahájí asynchronní operaci připojení. Tuto metodu nelze dědit.
BeginAppend(ArraySegment<Byte>, SequenceNumber, SequenceNumber, RecordAppendOptions, ReservationCollection, AsyncCallback, Object)	Zahájí asynchronní operaci připojení. Tuto metodu nelze dědit.
BeginAppend(IList<ArraySegment<Byte>>, SequenceNumber, SequenceNumber, RecordAppendOptions, AsyncCallback, Object)	Zahájí asynchronní operaci připojení. Tuto metodu nelze dědit.
BeginAppend(IList<ArraySegment<Byte>>, SequenceNumber, SequenceNumber, RecordAppendOptions, ReservationCollection, AsyncCallback, Object)	Zahájí asynchronní operaci připojení. Tuto metodu nelze dědit.
BeginFlush(SequenceNumber, AsyncCallback, Object)	Zahájí asynchronní operaci vyprázdnění s použitím místa, které bylo dříve v pořadí vyhrazeno. Tuto metodu nelze dědit.
BeginReserveAndAppend(ArraySegment<Byte>, SequenceNumber, SequenceNumber, RecordAppendOptions, ReservationCollection, Int64[], AsyncCallback, Object)	Zahájí asynchronní operaci rezervace a připojení. Tuto metodu nelze dědit.
BeginReserveAndAppend(IList<ArraySegment<Byte>>, SequenceNumber, SequenceNumber, RecordAppendOptions, ReservationCollection, Int64[], AsyncCallback, Object)	Zahájí asynchronní operaci rezervace a připojení. Tuto metodu nelze dědit.
BeginWriteRestartArea(ArraySegment<Byte>, SequenceNumber, ReservationCollection, AsyncCallback, Object)	Zahájí asynchronní operaci zápisu do oblasti restartování s využitím místa, které bylo dříve rezervováno v sekvenci. Tuto metodu nelze dědit.
BeginWriteRestartArea(IList<ArraySegment<Byte>>, SequenceNumber, ReservationCollection, AsyncCallback, Object)	Zahájí asynchronní operaci zápisu do oblasti restartování s využitím místa, které bylo dříve rezervováno v sekvenci. Tuto metodu nelze dědit.
CreateReservationCollection()	Vytvoří nový objekt ReservationCollection. Tuto metodu nelze dědit.
Dispose()	Uvolní prostředky používané komponentou.
EndAppend(IAsyncResult)	Ukončí asynchronní operaci připojení. Tuto metodu nelze dědit.
EndFlush(IAsyncResult)	Ukončí operaci asynchronního vyprázdnění. Tuto metodu nelze dědit.
EndReserveAndAppend(IAsyncResult)	Ukončí asynchronní operaci rezervace a připojení. Tuto metodu nelze dědit.
EndWriteRestartArea(IAsyncResult)	Ukončí asynchronní operaci restartování oblasti zápisu. Tuto metodu nelze dědit.
Equals(Object)	Určí, zda se zadaný objekt rovná aktuálnímu objektu. (Zděděno od Object)
Flush()	Zajišťuje, aby byly zapsány všechny připojené záznamy. Tuto metodu nelze dědit.
Flush(SequenceNumber)	Zajišťuje, že všechny připojené záznamy až do záznamu se zadaným pořadovým číslem a včetně záznamu byly trvale zapsány. Tuto metodu nelze dědit.
GetHashCode()	Slouží jako výchozí hashovací funkce. (Zděděno od Object)
GetType()	Type Získá z aktuální instance. (Zděděno od Object)
MemberwiseClone()	Vytvoří mělkou kopii aktuálního Objectsouboru . (Zděděno od Object)
ReadLogRecords(SequenceNumber, LogRecordEnumeratorType)	Vrátí výčtovou kolekci záznamů v sekvenci. Tuto metodu nelze dědit.
ReadRestartAreas()	Vrátí výčtovou kolekci oblastí restartování v sekvenci. Tuto metodu nelze dědit.
ReserveAndAppend(ArraySegment<Byte>, SequenceNumber, SequenceNumber, RecordAppendOptions, ReservationCollection, Int64[])	Automaticky vytvoří jednu rezervaci a připojí k sekvenci záznam. Tuto metodu nelze dědit.
ReserveAndAppend(IList<ArraySegment<Byte>>, SequenceNumber, SequenceNumber, RecordAppendOptions, ReservationCollection, Int64[])	Automaticky vytvoří jednu rezervaci a připojí k sekvenci záznam. Tuto metodu nelze dědit.
SetLastRecord(SequenceNumber)	Nastaví poslední záznam v .LogRecordSequence
ToString()	Vrátí řetězec, který představuje aktuální objekt. (Zděděno od Object)
WriteRestartArea(ArraySegment<Byte>)	Zapíše oblast restartování do .LogRecordSequence Tuto metodu nelze dědit.
WriteRestartArea(ArraySegment<Byte>, SequenceNumber)	Zapíše oblast restartování do LogRecordSequence a aktualizuje základní pořadové číslo. Tuto metodu nelze dědit.
WriteRestartArea(ArraySegment<Byte>, SequenceNumber, ReservationCollection)	Zapíše oblast restartování do LogRecordSequence služby pomocí rezervace a aktualizuje základní pořadové číslo. Tuto metodu nelze dědit.
WriteRestartArea(IList<ArraySegment<Byte>>)	Zapíše oblast restartování do .LogRecordSequence Tuto metodu nelze dědit.
WriteRestartArea(IList<ArraySegment<Byte>>, SequenceNumber)	Zapíše oblast restartování do LogRecordSequence a aktualizuje základní pořadové číslo. Tuto metodu nelze dědit.
WriteRestartArea(IList<ArraySegment<Byte>>, SequenceNumber, ReservationCollection)	Zapíše oblast restartování do LogRecordSequence služby pomocí rezervace a aktualizuje základní pořadové číslo. Tuto metodu nelze dědit.

Událost

TailPinned

Signalizuje potřebu pohybu chvostem sekvence.