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


Automatically makes a single reservation and appends a record to the sequence. This method cannot be inherited.

Namespace:   System.IO.Log
Assembly:  System.IO.Log (in System.IO.Log.dll)

public SequenceNumber ReserveAndAppend(
	IList<ArraySegment<byte>> data,
	SequenceNumber userRecord,
	SequenceNumber previousRecord,
	RecordAppendOptions recordAppendOptions,
	ReservationCollection reservationCollection,
	params long[] reservations


Type: System.Collections.Generic.IList<ArraySegment<Byte>>

A list of byte array segments that will be concatenated and appended as the record.

Type: System.IO.Log.SequenceNumber

The sequence number of the next record in the user-specified order.

Type: System.IO.Log.SequenceNumber

The sequence number of the next record in Previous order.

Type: System.IO.Log.RecordAppendOptions

A valid value of RecordAppendOptions that specifies how the data should be written.

Type: System.IO.Log.ReservationCollection

The reservation collection to make reservations in.

Type: System.Int64[]

The reservations to make, in bytes.

Return Value

Type: System.IO.Log.SequenceNumber

The sequence number of the appended log record.

Exception Condition

One or more of the arguments is invalid.


An I/O error occurred while appending the record.


The record sequence could not make enough free space to contain the new record, or to make the reservation.


The method was called after the sequence has been disposed of.


One or more of the arguments are null.


userRecord or previousRecord is not between the base and last sequence numbers of this sequence.


The operation cannot be performed because the record sequence was opened with read-only access.


There is not enough memory to continue the execution of the program.


Access for the specified log sequence is denied by the operating system.


No reservation large enough to fit data can be found in reservations.

Data contained in the data parameter will be concatenated into a single byte array for appending as the record. However, no provision is made for splitting data back into array segments when the record is read.

The specified reservations are added to the provided reservation collection in an atomic operation with a record append operation. If the append fails, no space is reserved.

Normally, this method may complete before the record has been written. To ensure that a record has been written, either specify the ForceFlush flag using the recordAppendOptions parameter, or call the Flush method.

.NET Framework
Available since 3.0
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