Partially read messages
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Key: DIRMINA-263
URL: http://issues.apache.org/jira/browse/DIRMINA-263
Project: Directory MINA
Issue Type: Wish
Affects Versions: 0.9.5
Environment: win xp
Reporter: Hooman Valibeigi
assume we have a client that sends its requests consecutively ()
I tested it using MINA and I found that MINA only notifies the server side
IoHandler one time for a sequence of requests
I mean when the client sends 3 consecutive requests the server's
messageReceived method will be invoked only once
(a Request in my opinion is a package containing a request ID and data related
to the request)
so my question is how should we handle the ByteBuffer that contains more than
one requests ?
the other IoSessions should not wait while the server is processing the
interminable requests of a client
in other word the server becomes busy while processing all sent and incoming
requests of one client and may never finish
even If it responds to the first buffered request in ByteBuffer and leave the
remaining requests in hope that they will remain intact for the next
messageReceived invocation from the same IoSession, it is wrong, since any
remaining byte in ByteBuffer will be released after the messageReceived method
is finished, whether we read them or not
so we should read all the incoming bytes or we will lose them
I ask you what is the correct solution to handle these kind of requests ?
in short, I want to process one request per messageReceived invocation and I
expect that IoHandler will notify me again if I have unread data from previous
messageReceived calls
this question may be translated in other way as below
when is messageReceived invoked ?
- when the selecetor selects a socket which is readable ?
- so what happens if I dont process all the available data (all requests)
within the ByteBuffer in one shot ?
- also another question arise. is there any chance that the ByteBuffer
parameter from messageReceived, does not have the full request data ? I mean is
it possible that a request arives in several messageReceived calls ? I ask this
because a ByteBuffer has a limit so It brings in mind that we may encounter
several problems
such that
- a ByteBuffer containing one partial request
- a ByteBuffer containing more than one request (all complete)
- a ByteBuffer containing more than one request (but the last one is partial)
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