/// <summary>
/// Calculates the size of the body.
/// </summary>
/// <param name="writer">The writer.</param>
/// <returns></returns>
protected override int CalculateBodySize(BsonWriter writer){
var size = 4; //first int32
size += writer.CalculateSize(FullCollectionName, false);
size += 4; //flags
size += writer.CalculateSizeObject(Selector);
size += writer.CalculateSizeObject(Document);
return size;
}
private string WriteAndReadLenString(string val){
var ms = new MemoryStream();
var bs = new BsonWriter(ms, new BsonDocumentDescriptor());
var w = new BinaryWriter(ms);
var byteCount = bs.CalculateSize(val, false);
w.Write(byteCount);
bs.Write(val, false);
ms.Seek(0, SeekOrigin.Begin);
var reader = new BsonReader(ms, new BsonDocumentBuilder());
return reader.ReadLengthString();
}
/// <summary>
/// Breaks down an insert message that may be too large into managable sizes.
/// When inserting only one document there will be only one chunk. However chances
/// are that when inserting thousands of documents at once there will be many.
/// </summary>
protected void ChunkMessage(BsonWriter writer){
var baseSize = CalculateBaseSize(writer);
var chunk = new MessageChunk{Size = baseSize, Documents = new List<object>()};
foreach(var document in Documents){
var documentSize = writer.CalculateSize(document);
if(documentSize + baseSize >= MaximumMessageSize)
throw new MongoException("Document is too big to fit in a message.");
if(documentSize + chunk.Size > MaximumMessageSize){
_chunks.Add(chunk);
chunk = new MessageChunk{Size = baseSize, Documents = new List<object>()};
}
chunk.Documents.Add(document);
chunk.Size += documentSize;
}
_chunks.Add(chunk);
}
/// <summary>
/// Calculates the size of the body.
/// </summary>
/// <param name="writer">The writer.</param>
/// <returns></returns>
protected override int CalculateBodySize(BsonWriter writer){
var size = 12; //options, numbertoskip, numbertoreturn
size += writer.CalculateSize(FullCollectionName, false);
size += writer.CalculateSizeObject(Query);
if(ReturnFieldSelector != null)
size += writer.CalculateSizeObject(ReturnFieldSelector);
return size;
}
/// <summary>
/// Calculates the size of the body.
/// </summary>
/// <param name="writer">The writer.</param>
/// <returns></returns>
protected override int CalculateBodySize(BsonWriter writer){
return writer.CalculateSize(Message, false);
}
/// <summary>
/// The base size that all chunks will have.
/// </summary>
protected int CalculateBaseSize(BsonWriter writer){
var size = 4; //first int32
size += writer.CalculateSize(FullCollectionName, false);
size += Header.MessageLength;
return size;
}
/// <summary>
/// Calculates the size of the body.
/// </summary>
/// <param name="writer">The writer.</param>
/// <returns></returns>
protected override int CalculateBodySize(BsonWriter writer){
var size = 4; //first int32
size += writer.CalculateSize(FullCollectionName, false);
size += 12; //number to return + cursorid
return size;
}