[Quickfix-developers] QuickFIX/J updates and new features

[Steve B. <sb...@sm...>]

I've updated the QuickFIX/J CSV HEAD with most of the features in the
1.11.0 version. I'm not currently planning to port the MSSQL and
PostgreSQL-specific classes but those databases can be accessed using
the existing JdbcLog and JdbcStore classes.
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I've also added some new features to the QuickFIX/J CVS head.
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I've added simple failover support for QF/J acceptors. When using a
MessageStore that supports shared data (FileStore, JdbcStore,
SleepycatStore) and implements the new RefreshableMessageStore
interface, the Session can be configured to refresh the store
information upon logon. You would typically run two acceptor processes
using a shared message store. One process would be the active acceptor
and the other would be the standby for any specific session. If one
acceptor process dies, the client (assuming they have been configured
with failover addresses) will attempt to logon to the other acceptor.
When they do, the message store for that session will be refreshed and
the session should continue normally. I've tried this with Banzai and
two Order Executors and it appears to work well. Note that this approach
doesn''t require that each acceptor is globally in an active or standby
role. Since that role is session-specific, both acceptors could be be
actively supporting sessions and when one node dies all the sessions on
that node will be automatically switched to the other node. This is
implemented simply by specifying the order of the failover addresses in
the QF settings file so that some clients initially connect to one node
and others connect to the other node. One weakness with this scenario is
that there's no way to redistribute the sessions to the two nodes once
the dead node is restarted. That can be added as future capability. I'll
provide more documentation and configuration scenarios in the
documentation (possibly after the beta 3 release).
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I've also created a first implementation of QF message component
classes. They still need more work, but you can try them by generating
the classes using the code generator in the CVS HEAD. The components are
in the quickfix.fix43.component and quickfix.fix44.component packages.
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Steve Bate
Smart Trade Technologies
Phone: +33 4 42 90 03 97
http://www.smart-trade.net/
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