| Re: [eclipselink-users] Listenening to Session/ UnitofWork Events from jpa/j2ee |
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this is looking ok so far - I'm assuming that a
given transaction is associated with one thread, however there may
be >1 transaction per thread - eg when calling ejb method that
is @REQUIRES_NEW - which I think is what is happening for thread
w: 21 below. so - the info I wish to accumulate per transaction needs to know which transaction it belongs to - eg info added at *a* and *d* below belong to the outer transaction and those from *c* & *d* belong to 2 different transactions - but I see no obvious way to find a 'current transaction id' so - the id below is just the hashcode of the Session as per the listener code below. I can keep track of which transaction I should associate info with by using a threadLocal to hold the current id changing it as postBegin and postCommit/Rollback events come into the listener. 3 questions : is the hashcode() of the session good enough to use as the transaction id for this? or am i better off just incrementing/decrementing depth as begin and commit/rollback events come in ? any other cunning ideas? 2011-10-24 13:09:38,006 TRACE biz.wss.jpa.eclipselink.SessionListener [p: thread-pool-1; w: 20] (SessionListener.java:34) - postCommitTransaction :1254684283 2011-10-24 13:09:38,012 TRACE biz.wss.jpa.eclipselink.SessionListener [p: thread-pool-1; w: 20] (SessionListener.java:47) - postBeginTransaction :1512523073 2011-10-24 13:09:38,016 TRACE biz.wss.jpa.eclipselink.SessionListener [p: thread-pool-1; w: 20] (SessionListener.java:34) - postCommitTransaction :1512523073 2011-10-24 13:09:38,023 TRACE biz.wss.jpa.eclipselink.SessionListener [p: thread-pool-1; w: 20] (SessionListener.java:47) - postBeginTransaction :787144669 2011-10-24 13:09:38,026 TRACE biz.wss.jpa.eclipselink.SessionListener [p: thread-pool-1; w: 20] (SessionListener.java:34) - postCommitTransaction :787144669 2011-10-24 13:09:38,214 TRACE biz.wss.jpa.eclipselink.SessionListener [p: thread-pool-1; w: 20] (SessionListener.java:34) - postCommitTransaction :1032168624 2011-10-24 13:09:38,475 TRACE biz.wss.jpa.eclipselink.SessionListener [p: thread-pool-1; w: 17] (SessionListener.java:47) - postBeginTransaction :1456358112 2011-10-24 13:09:38,482 TRACE biz.wss.jpa.eclipselink.SessionListener [p: thread-pool-1; w: 17] (SessionListener.java:34) - postCommitTransaction :1456358112 2011-10-24 13:09:38,716 TRACE biz.wss.jpa.eclipselink.SessionListener [p: thread-pool-1; w: 15] (SessionListener.java:47) - postBeginTransaction :1039139907 2011-10-24 13:09:38,729 TRACE biz.wss.jpa.eclipselink.SessionListener [p: thread-pool-1; w: 15] (SessionListener.java:34) - postCommitTransaction :1039139907 2011-10-24 13:09:38,764 TRACE biz.wss.jpa.eclipselink.SessionListener [p: thread-pool-1; w: 21] (SessionListener.java:47) - postBeginTransaction :1028020992 *a* 2011-10-24 13:09:38,784 TRACE biz.wss.jpa.eclipselink.SessionListener [p: thread-pool-1; w: 21] (SessionListener.java:47) - postBeginTransaction :54512809 *b* 2011-10-24 13:09:38,788 TRACE biz.wss.jpa.eclipselink.SessionListener [p: thread-pool-1; w: 21] (SessionListener.java:34) - postCommitTransaction :54512809 *c* 2011-10-24 13:09:38,820 TRACE biz.wss.jpa.eclipselink.SessionListener [p: thread-pool-1; w: 21] (SessionListener.java:47) - postBeginTransaction :1001893012 *d* 2011-10-24 13:09:38,827 TRACE biz.wss.jpa.eclipselink.SessionListener [p: thread-pool-1; w: 21] (SessionListener.java:34) - postCommitTransaction :1001893012 2011-10-24 13:09:38,840 TRACE biz.wss.jpa.eclipselink.SessionListener [p: thread-pool-1; w: 21] (SessionListener.java:34) - postCommitTransaction :1028020992 2011-10-24 13:09:38,852 TRACE biz.wss.jpa.eclipselink.SessionListener [p: thread-pool-1; w: 21] (SessionListener.java:47) - postBeginTransaction :376508753 2011-10-24 13:09:38,856 TRACE biz.wss.jpa.eclipselink.SessionListener [p: thread-pool-1; w: 21] (SessionListener.java:34) - postCommitTransaction :376508753 public class SessionListener extends SessionEventAdapter { private static final Log log = LogFactory.getLog(SessionListener.class); @Override public void postCommitTransaction(SessionEvent event) { log.trace("postCommitTransaction :" + event.getSession().hashCode() ); super.postCommitTransaction(event); } @Override public void postRollbackTransaction(SessionEvent event) { log.trace("postRollbackTransaction :" + event.getSession().hashCode() ); super.postRollbackTransaction(event); } @Override public void postBeginTransaction(SessionEvent event) { log.trace("postBeginTransaction :" + event.getSession().hashCode() ); super.postBeginTransaction(event); } public class SessionCustomizer implements org.eclipse.persistence.config.SessionCustomizer { private static final Log log = LogFactory.getLog(SessionCustomizer.class); public SessionCustomizer(){} public void customize(Session paramSession) throws Exception { paramSession.getEventManager().addListener(new SessionEventAdapter() { @Override public void postLogin(SessionEvent event) { event.getSession().getPlatform().setShouldBindLiterals(false); log.debug("Registering listener"); event.getSession().getEventManager().addListener(new SessionListener()); } }); } On 20/10/2011 14:29, Tom Ware wrote: The best way to configure a SessionEventListener, is in a SessionCustomizer by using EclipseLink specific code. |