[jboss-dev-forums] [Design of Messaging on JBoss (Messaging/JBoss)] - Re: Some thoughts on large messages and message chunking

[clebert.suconic@jboss.com]

"Tim Fox" wrote : When sending a message, we simply check if message size is greater than ml. If false then message sending and delivery proceeds exactly as normal. If true, then we send a standard SendMessage packet, followed by n MessageContinuation packets which contains the rest of the message split into each packet.
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I'm doing this with a slightly variant.

SessionSendMessage creates the ServerMessageImpl, and decode/encodes directly from the Buffer to avoid copy and get some performance. 

As SessionSendMessage is the class responsible for creating the MessageImpl, I was have a little difficult on instantiating the ServerMessage that will store the body on a file. 

Because of that, when using LargeMessages I'm using another PacketType to deal with Large Messages. With that the regular use case would be optimized avoiding extra non necessary copies.

I will commit it tomorrow (on trunk or another branch) and it will be easier to talk about this later when I have some code to show the differences.

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