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Posted to dev@synapse.apache.org by "Andreas Veithen (JIRA)" <ji...@apache.org> on 2008/09/14 02:28:44 UTC
[jira] Assigned: (SYNAPSE-434) Concurrency level provided by the
mail and VFS transports listeners is insufficient
[ https://issues.apache.org/jira/browse/SYNAPSE-434?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Andreas Veithen reassigned SYNAPSE-434:
---------------------------------------
Assignee: Andreas Veithen
> Concurrency level provided by the mail and VFS transports listeners is insufficient
> -----------------------------------------------------------------------------------
>
> Key: SYNAPSE-434
> URL: https://issues.apache.org/jira/browse/SYNAPSE-434
> Project: Synapse
> Issue Type: Bug
> Components: Transports
> Affects Versions: 1.2
> Reporter: Andreas Veithen
> Assignee: Andreas Veithen
> Priority: Minor
>
> Scenario:
> * Two services are configured to use the (mail or VFS) transport.
> * Two messages are sent two each of these services.
> In this case, one would expect that the transport listener will be able to process at least 2 (better 4) messages concurrently. However the listener currently only processes one message at a time, i.e. the listener behaves as if it was single-threaded.
> There are two reasons for this:
> 1. AbstractPollingTransportListener contains the following code:
> workerPool.execute(new Runnable() {
> public void run() {
> synchronized (pollLock) {
> pollInProgress = true;
> try {
> onPoll();
> } finally {
> pollInProgress = false;
> }
> }
> }
> });
> Since pollLock is a member of AbstractPollingTransportListener, there can only be one poll in progress at a time, even if several services are configured to use the transport (in which case nothing would prevent the transport from executing the polls for the different services in parallel).
> 2. Both MailTransportListener and VFSTransportListener process incoming messages sequentially. Here again, the transport could process several messages in parallel during the execution of the onPoll method.
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