Hello everybody,
I am trying to implement a function with the ODMG API and Struts.
The model is a 1:n relationship between objects of two types, let's say a
class BankAccount that owns a collection of BankTransactions. In a first
page the user chooses an account to manage, then the application shows a
second page he inserts a Transaction.
To do that, I open an ODMG transaction at the beginning end store it in the
HTTP session. With this transaction I retrieve the BankAccount in the
Struts Action corresponding to the first page and I store it also in the
http session. In the second Struts action I create a new BankTransaction,
add it to my BankAccount and try to do a checkpoint() with the stored
transaction. This does not work every time.
I get a "org.odmg.TransactionNotInProgressException: Calling method needed
transaction, but no transaction found for current thread :-(". The whole
stack trace is at the end of this mail.
I looked a bit further and saw that LocalTxManager indexes the transactions
in a hashmap by the Thread that registered them. Since I am in a servlet I
have no warranty that two different http requests, as i have in my example,
are managed by the same thread and this explains why sometimes it does not
work (Actually, it works from time to time only because I am the only user
of my developement server ;-)).
I have serched the documentation and the users list, but did not find
anything about this problem. Is there anywhere a parameter that I did not
see right or is this a bug ?
Thank you
Stefano
org.odmg.TransactionNotInProgressException: Calling method needed
transaction, but no transaction found for current thread :-(
at
org.apache.ojb.odmg.LocalTxManager.getCurrentTransaction(LocalTxManager.java:50)
at
org.apache.ojb.odmg.locking.LockStrategyFactory.getIsolationLevel(LockStrategyFactory.java:83)
at
org.apache.ojb.odmg.locking.LockStrategyFactory.getStrategyFor(LockStrategyFactory.java:54)
at
org.apache.ojb.odmg.locking.LockManagerDefaultImpl.upgradeLock(LockManagerDefaultImpl.java:87)
at org.apache.ojb.odmg.TransactionImpl.lock(TransactionImpl.java:254)
at
org.apache.ojb.odmg.ObjectEnvelopeTable.upgradeImplicitLocksAndCheckIfCommitIsNeeded(ObjectEnvelopeTable.java:260)
at
org.apache.ojb.odmg.ObjectEnvelopeTable.commit(ObjectEnvelopeTable.java:152)
at
org.apache.ojb.odmg.TransactionImpl.doCommitOnObjects(TransactionImpl.java:306)
at
org.apache.ojb.odmg.TransactionImpl.checkpoint(TransactionImpl.java:441)
at
ch.admin.ofit.framework.persistence.ojb.odmg.PersistenceManagerOjbOdmgImpl.storeState(PersistenceManagerOjbOdmgImpl.java:83)
at
ch.admin.formation.controler.creation.ControleurCreation.valideDecision(ControleurCreation.java:129)
at
ch.admin.formation.controler.creation.DecisionCreationEtat.transitionSuivant(DecisionCreationEtat.java:49)
at
ch.admin.formation.controler.creation.MachineEtatsCreation.transmetTransition(MachineEtatsCreation.java:35)
at
ch.admin.formation.struts.BusinessAction.perform(BusinessAction.java:39)
at
org.apache.struts.action.ActionServlet.processActionPerform(ActionServlet.java:1787)
at
org.apache.struts.action.ActionServlet.process(ActionServlet.java:1586)
at
org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:510)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:760)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:247)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)
at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:256)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at
org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at
org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at
org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2415)
at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at
org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:171)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:172)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at
org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:174)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at
org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at
org.apache.coyote.tomcat4.CoyoteAdapter.service(CoyoteAdapter.java:223)
at
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:594)
at
org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:392)
at
org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:565)
at
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:619)
at java.lang.Thread.run(Thread.java:513)
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