I wanted to create a hangout for this, but running a bit out of time,so a quick reply here:
2014-09-24 19:35 GMT+02:00 Liwei Peng <[email protected]>: > Hi, > > I am creating a new output plugin. I am using message batching and multiple > worker queue instances. I have a question on how rsyslog handles > multi-threading. > > Question: will rsyslog design make sure the 'BeginTransaction/DoAction n > times/EndTransaction' is thread safe? so that for each worker instance, > doAction, beginTransaction, endTransaction will never be called at the same > time? Thanks. > Exactly. The need to be reentrant-safe, though. Because they may get called concurrently for *different* worker instances. For new code, it is preferable to use commitTransaction -- see ./tools/omfile.c for an example. > The following is the related doc. I am not sure what the 'entry point' > means, is it at function level, or at > beginTransaction/doAction/EndTransaction level? > > > From this link: > http://www.rsyslog.com/doc/master/development/dev_oplugins.html, about > threading: > That doc needs some upgrading for v8, but in essence it's right. HTH Rainer > > However, a plugin’s entry points are guaranteed to be never called > concurrently *for the same action*. That means your plugin must be able to > be called concurrently by two or more threads, but you can be sure that for > the same instance no concurrent calls happen. _______________________________________________ > rsyslog mailing list > http://lists.adiscon.net/mailman/listinfo/rsyslog > http://www.rsyslog.com/professional-services/ > What's up with rsyslog? Follow https://twitter.com/rgerhards > NOTE WELL: This is a PUBLIC mailing list, posts are ARCHIVED by a myriad > of sites beyond our control. PLEASE UNSUBSCRIBE and DO NOT POST if you > DON'T LIKE THAT. _______________________________________________ rsyslog mailing list http://lists.adiscon.net/mailman/listinfo/rsyslog http://www.rsyslog.com/professional-services/ What's up with rsyslog? Follow https://twitter.com/rgerhards NOTE WELL: This is a PUBLIC mailing list, posts are ARCHIVED by a myriad of sites beyond our control. PLEASE UNSUBSCRIBE and DO NOT POST if you DON'T LIKE THAT.
