private void RetrieveData()
{
QueryMessage query = new QueryMessage();
query.FullCollectionName = this.FullCollectionName;
query.Query = BuildSpec();
query.NumberToReturn = this.limit;
query.NumberToSkip = this.skip;
query.Options = options;
if(this.fields != null){
query.ReturnFieldSelector = this.fields;
}
try{
this.reply = connection.SendTwoWayMessage(query);
this.id = this.reply.CursorID;
if(this.limit < 0)this.limit = this.limit * -1;
}catch(IOException ioe){
throw new MongoCommException("Could not read data, communication failure", this.connection,ioe);
}
}
private void RetrieveMoreData()
{
GetMoreMessage gmm = new GetMoreMessage(this.fullCollectionName, this.Id, this.limit);
try{
this.reply = connection.SendTwoWayMessage(gmm);
this.id = this.reply.CursorID;
}catch(IOException ioe){
this.id = 0;
throw new MongoCommException("Could not read data, communication failure", this.connection,ioe);
}
}
/// <summary>
/// Used for sending a message that gets a reply such as a query.
/// </summary>
/// <param name="msg"></param>
/// <returns></returns>
/// <exception cref="IOException">A reconnect will be issued but it is up to the caller to handle the error.</exception>
public ReplyMessage SendTwoWayMessage(IRequestMessage msg)
{
if (this.State != ConnectionState.Opened) {
throw new MongoCommException ("Operation cannot be performed on a closed connection.", this);
}
try {
ReplyMessage reply = new ReplyMessage ();
lock (_connection) {
msg.Write (_connection.GetStream ());
reply.Read (_connection.GetStream ());
}
return reply;
} catch (IOException) {
ReplaceInvalidConnection ();
throw;
}
}
