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https://issues.apache.org/jira/browse/DIRMINA-1172?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17757914#comment-17757914
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Emmanuel Lécharny commented on DIRMINA-1172:
--------------------------------------------
The idea is to build a key that contains the remote address and the local port.
All in all, there is no reason to create a session that is shared between two
ports.
> Multiple DatagramAcceptors and the creation of a session object
> ---------------------------------------------------------------
>
> Key: DIRMINA-1172
> URL: https://issues.apache.org/jira/browse/DIRMINA-1172
> Project: MINA
> Issue Type: Bug
> Components: Core
> Affects Versions: 2.1.5
> Reporter: Alexander B
> Priority: Major
> Attachments: DIRMINA1172.java, UDPTest4.java
>
>
> Hello,
> I am using two independently created NioDatagramAcceptors, which are created
> by the following code :
> {code:java}
> AbstractIoService inputSource = new NioDatagramAcceptor();
> ((NioDatagramAcceptor) inputSource).getSessionConfig().setReuseAddress(true);
> DefaultIoFilterChainBuilder filterChainBuilderUDP =
> ((NioDatagramAcceptor)inputSource).getFilterChain();
> filterChainBuilderUDP.addLast("logger", new LoggingFilter());
> ((NioDatagramAcceptor)
> inputSource).getSessionConfig().setIdleTime(IdleStatus.READER_IDLE,
> getIdleTimeout());
> ((NioDatagramAcceptor) inputSource).setHandler(this);
> try {
> ((NioDatagramAcceptor)inputSource).bind(new InetSocketAddress(port));
> } catch (IOException e) {
> log.error("Failed to connect {}", e);
> }
> {code}
> One Acceptor is listening on port 9800, the other one on 9801. If I now send
> UDP packages (from a external application) to both ports (independently). It
> seems, that both UDP port are "connected" to the same session.
> Information: The external app is sending:
> Message "TEST_1 <timestamp>" just to port 9800
> Message "TEST_2 <timestamp>" just to port 9801
> The overwritten method messageReceived will give the following output:
> {code:java}
> public void messageReceived(IoSession session, Object message) throws
> Exception {
> String msgStr = message.toString();
> log.info("SessionId:" + session.getId() + " " + msgStr);
> }
> {code}
> 2023-04-19_11:47:35.035 [NioDatagramAcceptor-2] INFO - SessionId:1 TEST_1
> 1681904855701
> 2023-04-19_11:47:35.035 [NioDatagramAcceptor-3] INFO - SessionId:1 TEST_2
> 1681904855701
> So, both messages (for port 9800 and port 9801) are received by SessionId1.
> If I do exactly the same with `NioSocketConnector`, I can see two different
> sessions, such that both messages are handled independently:
> 2023-04-19_11:44:35.725 [NioProcessor-11] INFO - SessionId:1 TEST_1
> 1681904875701
> 2023-04-19_11:44:37.754 [NioProcessor-15] INFO - SessionId:2 TEST_2
> 1681904875701
> Is there anything I did not mention in the context of UDP/DatagramAcceptor?
> Or is there any setting, such that DatagramAcceptors can create/handle their
> own session objects?
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