general

TransactionManager Debug and Trace events

While working on a project, from time to time, we might request the TransactionManager ‘Debug’ and ‘Trace’ events.

The Debug event is the one created by the org.jpos.transaction.Debug participant and looks like this:

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JCARD
  100.55
  org.jpos.iso.channel.CSChannel@71e13a2c
  open \[0.6/0.6\]
     prepare-response \[6.0/6.6\]
     close \[1.0/7.6\]
     end \[15.3/15.3\] 
  Sun Feb 12 22:47:39 UYST 2012
  txnmgr
  org.jpos.ee.DB@7a315068
  100.55 (notsupported prepareresponse close sendresponse)
  invalid.request
  Unsupported transaction
  ...
  ...

It basically dumps the Context. On the other hand, the Trace event usually comes after the Debug
(provided the TransactionManager’s trace property is set to true) and looks like this:

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txnmgr-1:2
           prepare: org.jpos.jcard.PrepareContext NO_JOIN
           prepare: org.jpos.jcard.CheckVersion READONLY NO_JOIN
           prepare: org.jpos.transaction.Open READONLY NO_JOIN
           prepare: org.jpos.jcard.Switch READONLY NO_JOIN
     groupSelector: notsupported prepareresponse close sendresponse
           prepare: org.jpos.jcard.NotSupported NO_JOIN
           prepare: org.jpos.jcard.PrepareResponse NO_JOIN
           prepare: org.jpos.transaction.Close READONLY
           prepare: org.jpos.jcard.SendResponse READONLY
           prepare: org.jpos.jcard.ProtectDebugInfo READONLY
           prepare: org.jpos.transaction.Debug READONLY
            commit: org.jpos.transaction.Close
            commit: org.jpos.jcard.SendResponse
            commit: org.jpos.jcard.ProtectDebugInfo
            commit: org.jpos.transaction.Debug
   head=3, tail=3, outstanding=0, active-sessions=2/2, tps=0, peak=0, avg=0.00, elapsed=22ms
   prepare: org.jpos.jcard.PrepareContext \[0.0/0.0\]
     prepare: org.jpos.jcard.CheckVersion \[0.0/0.0\]
     prepare: org.jpos.transaction.Open \[0.5/0.6\]
     prepare: org.jpos.jcard.Switch \[0.0/0.6\]
     prepare: org.jpos.jcard.NotSupported \[0.1/0.7\]
     prepare: org.jpos.jcard.PrepareResponse \[5.8/6.6\]
     prepare: org.jpos.transaction.Close \[0.0/6.6\]
     prepare: org.jpos.jcard.SendResponse \[0.0/6.6\]
     prepare: org.jpos.jcard.ProtectDebugInfo \[0.0/6.7\]
     prepare: org.jpos.transaction.Debug \[0.0/6.7\]
      commit: org.jpos.transaction.Close \[1.0/7.7\]
      commit: org.jpos.jcard.SendResponse \[4.3/12.0\]
      commit: org.jpos.jcard.ProtectDebugInfo \[0.2/12.3\]
      commit: org.jpos.transaction.Debug \[9.3/21.7\]
     end \[22.8/22.8\]

UPDATE - in recent versions of jPOS, the Debug and Trace events are placed together by the TransactionManager.