IRecordSequence.BeginReserveAndAppend Method
Definition
Important
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When overridden in a derived class, begins an asynchronous reserve and append operation.
Overloads
| BeginReserveAndAppend(ArraySegment<Byte>, SequenceNumber, SequenceNumber, RecordAppendOptions, ReservationCollection, Int64[], AsyncCallback, Object) |
When overridden in a derived class, begins an asynchronous reserve and append operation. |
| BeginReserveAndAppend(IList<ArraySegment<Byte>>, SequenceNumber, SequenceNumber, RecordAppendOptions, ReservationCollection, Int64[], AsyncCallback, Object) |
When overridden in a derived class, begins an asynchronous reserve and append operation. |
BeginReserveAndAppend(ArraySegment<Byte>, SequenceNumber, SequenceNumber, RecordAppendOptions, ReservationCollection, Int64[], AsyncCallback, Object)
When overridden in a derived class, begins an asynchronous reserve and append operation.
public:
IAsyncResult ^ BeginReserveAndAppend(ArraySegment<System::Byte> data, System::IO::Log::SequenceNumber nextUndoRecord, System::IO::Log::SequenceNumber previousRecord, System::IO::Log::RecordAppendOptions recordAppendOptions, System::IO::Log::ReservationCollection ^ reservationCollection, cli::array <long> ^ reservations, AsyncCallback ^ callback, System::Object ^ state);public IAsyncResult BeginReserveAndAppend (ArraySegment<byte> data, System.IO.Log.SequenceNumber nextUndoRecord, System.IO.Log.SequenceNumber previousRecord, System.IO.Log.RecordAppendOptions recordAppendOptions, System.IO.Log.ReservationCollection reservationCollection, long[] reservations, AsyncCallback callback, object state);abstract member BeginReserveAndAppend : ArraySegment<byte> * System.IO.Log.SequenceNumber * System.IO.Log.SequenceNumber * System.IO.Log.RecordAppendOptions * System.IO.Log.ReservationCollection * int64[] * AsyncCallback * obj -> IAsyncResultPublic Function BeginReserveAndAppend (data As ArraySegment(Of Byte), nextUndoRecord As SequenceNumber, previousRecord As SequenceNumber, recordAppendOptions As RecordAppendOptions, reservationCollection As ReservationCollection, reservations As Long(), callback As AsyncCallback, state As Object) As IAsyncResultParameters
- data
- ArraySegment<Byte>
A list of byte array segments that will be concatenated and appended as the record.
- nextUndoRecord
- SequenceNumber
The sequence number of the next record in the user-specified order.
- previousRecord
- SequenceNumber
The sequence number of the next record in Previous order.
- recordAppendOptions
- RecordAppendOptions
A valid value of RecordAppendOptions that specifies how the data should be written.
- reservationCollection
- ReservationCollection
The reservation collection to make reservations in.
- reservations
- Int64[]
The reservations to make, in bytes.
- callback
- AsyncCallback
An optional asynchronous callback, to be called when the append is complete.
- state
- Object
A user-provided object that distinguishes this particular asynchronous append request from other requests.
Returns
An IAsyncResult that represents this asynchronous operation, which could still be pending.
Exceptions
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.
Remarks
You should pass the IAsyncResult returned by this method to the EndReserveAndAppend method to ensure that the append operation has completed and resources can be freed appropriately. If an error has occurred during an asynchronous append, an exception is not thrown until the EndReserveAndAppend method is called with the IAsyncResult returned by this method.
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.
If a record sequence has been disposed of, or if you pass an invalid argument, exceptions are thrown immediately within this operation. Errors that occurred during an asynchronous append request, for example, a disk failure during the I/O request, will result in exceptions being thrown when the EndReserveAndAppend method is called.
Applies to
BeginReserveAndAppend(IList<ArraySegment<Byte>>, SequenceNumber, SequenceNumber, RecordAppendOptions, ReservationCollection, Int64[], AsyncCallback, Object)
When overridden in a derived class, begins an asynchronous reserve and append operation.
public:
IAsyncResult ^ BeginReserveAndAppend(System::Collections::Generic::IList<ArraySegment<System::Byte>> ^ data, System::IO::Log::SequenceNumber nextUndoRecord, System::IO::Log::SequenceNumber previousRecord, System::IO::Log::RecordAppendOptions recordAppendOptions, System::IO::Log::ReservationCollection ^ reservationCollection, cli::array <long> ^ reservations, AsyncCallback ^ callback, System::Object ^ state);public IAsyncResult BeginReserveAndAppend (System.Collections.Generic.IList<ArraySegment<byte>> data, System.IO.Log.SequenceNumber nextUndoRecord, System.IO.Log.SequenceNumber previousRecord, System.IO.Log.RecordAppendOptions recordAppendOptions, System.IO.Log.ReservationCollection reservationCollection, long[] reservations, AsyncCallback callback, object state);abstract member BeginReserveAndAppend : System.Collections.Generic.IList<ArraySegment<byte>> * System.IO.Log.SequenceNumber * System.IO.Log.SequenceNumber * System.IO.Log.RecordAppendOptions * System.IO.Log.ReservationCollection * int64[] * AsyncCallback * obj -> IAsyncResultPublic Function BeginReserveAndAppend (data As IList(Of ArraySegment(Of Byte)), nextUndoRecord As SequenceNumber, previousRecord As SequenceNumber, recordAppendOptions As RecordAppendOptions, reservationCollection As ReservationCollection, reservations As Long(), callback As AsyncCallback, state As Object) As IAsyncResultParameters
- data
- IList<ArraySegment<Byte>>
A list of byte array segments that will be concatenated and appended as the record.
- nextUndoRecord
- SequenceNumber
The sequence number of the next record in the user-specified order.
- previousRecord
- SequenceNumber
The sequence number of the next record in Previous order.
- recordAppendOptions
- RecordAppendOptions
A valid value of RecordAppendOptions that specifies how the data should be written.
- reservationCollection
- ReservationCollection
The reservation collection to make reservations in.
- reservations
- Int64[]
The reservations to make, in bytes.
- callback
- AsyncCallback
An optional asynchronous callback, to be called when the append is complete.
- state
- Object
A user-provided object that distinguishes this particular asynchronous append request from other requests.
Returns
An IAsyncResult that represents this asynchronous operation, which could still be pending.
Exceptions
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.
Remarks
You should pass the IAsyncResult returned by this method to the EndReserveAndAppend method to ensure that the append operation has completed and resources can be freed appropriately. If an error has occurred during an asynchronous append, an exception is not thrown until the EndReserveAndAppend method is called with the IAsyncResult returned by this method.
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.
If a record sequence has been disposed of, or if you pass an invalid argument, exceptions are thrown immediately within this operation. Errors that occurred during an asynchronous append request, for example, a disk failure during the I/O request, will result in exceptions being thrown when the EndReserveAndAppend method is called.
