The documentation link you supplied: I'm not sure what I am looking for in it. That's what I meant to say.
To cut this down is there a demonstration project where this is already correctly configured? May be simpler than explaining the changes to me :) On 2 July 2013 12:14, Romain Manni-Bucau <[email protected]> wrote: > didnt get the first sentence > > about the "make it worse" it is what i explained in my previous answer: if > you start without a db and openjpa uses automatically the wrong dictionnary > then even if the db is back and the pool well configured, the jpa layer > will generate wrong SQL so it will not work, so your app is broken whatever > the db state is. > > *Romain Manni-Bucau* > *Twitter: @rmannibucau <https://twitter.com/rmannibucau>* > *Blog: **http://rmannibucau.wordpress.com/*< > http://rmannibucau.wordpress.com/> > *LinkedIn: **http://fr.linkedin.com/in/rmannibucau* > *Github: https://github.com/rmannibucau* > > > > 2013/7/2 James Green <[email protected]> > > > Am I looking for something letting me list the classes I want mapped? The > > error I see shows an empty list, hence this particular question. > > > > You say it doesn't solve our issue and can actually make it worse? Care > to > > elaborate? > > > > > > On 2 July 2013 09:17, Romain Manni-Bucau <[email protected]> wrote: > > > > > the dict doc is here > > > > > > > > > http://openjpa.apache.org/builds/2.2.2/apache-openjpa/docs/ref_guide_dbsetup_dbsupport.html > > > > > > it is important to set it if the database can be down at startup > > otherwise > > > you can end up with a wrong dict (generally the generic one) and then > > when > > > the database is up again SQL stuff will not work > > > > > > it doesn't solve your issue but it can make it worse > > > > > > *Romain Manni-Bucau* > > > *Twitter: @rmannibucau <https://twitter.com/rmannibucau>* > > > *Blog: **http://rmannibucau.wordpress.com/*< > > > http://rmannibucau.wordpress.com/> > > > *LinkedIn: **http://fr.linkedin.com/in/rmannibucau* > > > *Github: https://github.com/rmannibucau* > > > > > > > > > > > > 2013/7/2 James Green <[email protected]> > > > > > > > That's exactly what I want. All I have are EJBs with entity managers > > > > injected via @PersistenceContext (exactly as we are taught in the > > > > "Beginning Java EE 6 Platform with Glassfish 3" book which is how > this > > > > application began life. > > > > > > > > So what's the difference I wonder? Romain talks about adding a > > dictionary > > > > but I didn't spot anything spectacularly obvious in a browse of the > > > OpenJPA > > > > user guide yesterday (indeed on the subject of injection it told me > to > > > > refer to my application server documentation...). > > > > > > > > > > > > > > > > On 1 July 2013 18:05, José Luis Cetina <[email protected]> wrote: > > > > > > > > > I did this test: > > > > > > > > > > 1. Stop TomEE > > > > > 2. Shutdown my database server > > > > > 3. Start TomEE > > > > > 4. Try to access to my app, i could access but when i hit my login > > > button > > > > > for example then i get this error: > > > > > > com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: > > > > > Could not create connection to database server. Attempted > reconnect 3 > > > > > times. Giving up. > > > > > 5. Start up my database server > > > > > 6. Wait for my database to be ready, i refresh the page then hit > > again > > > at > > > > > the login button, then my app run without problem (in this point i > > DONT > > > > > stop/start TomEE again). > > > > > > > > > > Is this the behavior that you need/want it?? > > > > > > > > > > > > > > > *Remeber that i have tomee and database in separate server's > > > > > > > > > > > > > > > 2013/7/1 Howard W. Smith, Jr. <[email protected]> > > > > > > > > > > > Will you be trying the magic that Romain recommended? > > > > > > On Jul 1, 2013 10:34 AM, "James Green" < > [email protected]> > > > > > wrote: > > > > > > > > > > > > > I was asking about cold boot, specifically. It is when the > > > > application > > > > > > > server begins that the JPA implementation performs the Entity > > > > mapping, > > > > > so > > > > > > > if the database is not available presumably it remains dead > until > > > the > > > > > > > application server itself is restarted? > > > > > > > > > > > > > > Unless you already have the magic installed that Romain refers > > to. > > > > > > > > > > > > > > > > > > > > > On 1 July 2013 15:24, José Luis Cetina <[email protected]> > > > wrote: > > > > > > > > > > > > > > > My entire app use database and of course the app doesnt work > if > > > the > > > > > > > > database is unavailable, but when the database server is > > > available > > > > > > again > > > > > > > > the webapp can use the database again without restarting > TomEE. > > > > > > > > > > > > > > > > I dont know if i response your question. > > > > > > > > > > > > > > > > > > > > > > > > 2013/7/1 James Green <[email protected]> > > > > > > > > > > > > > > > > > Are you saying your application starts from cold without > the > > > > > > database, > > > > > > > > the > > > > > > > > > operates fine without intervention once the database > becomes > > > > > > available? > > > > > > > > > > > > > > > > > > > > > > > > > > > On 1 July 2013 14:26, José Luis Cetina < > [email protected] > > > > > > > > wrote: > > > > > > > > > > > > > > > > > > > I have also differents server, 1 one database and 2 for > > TomEE > > > > > > (using > > > > > > > > > > memcached + cluster) and with autoReconnect=true i dont > > have > > > > any > > > > > > > issue > > > > > > > > > when > > > > > > > > > > the database server reboot, i set this attribute > > > > (autoReconnect) > > > > > > > after > > > > > > > > i > > > > > > > > > > experiment your same problems, when the database server > > > > rebooted > > > > > my > > > > > > > > apps > > > > > > > > > > cant connect anymore to the database server, i had to > stop > > > and > > > > > > start > > > > > > > > > tomee > > > > > > > > > > again for work. But then, i add that option and now i > work > > > with > > > > > any > > > > > > > > > > problem. > > > > > > > > > > > > > > > > > > > > Here is a example of my Resource: > > > > > > > > > > > > > > > > > > > > <Resource id="ANY_NAME" type="DataSource"> > > > > > > > > > > JdbcDriver com.mysql.jdbc.Driver > > > > > > > > > > JdbcUrl > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > jdbc:mysql://any_ip:3306/any_database?zeroDateTimeBehavior=convertToNull&rewriteBatchedStatements=true&autoReconnect=true > > > > > > > > > > UserName any_user > > > > > > > > > > Password any_password > > > > > > > > > > JtaManaged true > > > > > > > > > > InitialSize=3 > > > > > > > > > > MaxActive=100 > > > > > > > > > > ValidationQuery=SELECT 1 > > > > > > > > > > TestOnBorrow=true > > > > > > > > > > </Resource> > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > 2013/7/1 James Green <[email protected]> > > > > > > > > > > > > > > > > > > > > > This now sounds substantially more complex than my > design > > > > > (which > > > > > > > uses > > > > > > > > > > > @PersistenceContext(unitName="accounts")) caters for. > Is > > > > there > > > > > an > > > > > > > > > example > > > > > > > > > > > of what you mean somewhere so I can scope the work out? > > > > > > > > > > > > > > > > > > > > > > Thanks > > > > > > > > > > > James > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > On 1 July 2013 12:44, Romain Manni-Bucau < > > > > > [email protected]> > > > > > > > > > wrote: > > > > > > > > > > > > > > > > > > > > > > > Hi > > > > > > > > > > > > > > > > > > > > > > > > it depends your config and that's probably more an > > > openjpa > > > > > > > question > > > > > > > > > but > > > > > > > > > > > > basically you'll need to provide the dictionnary to > use > > > > since > > > > > > > > openjpa > > > > > > > > > > > will > > > > > > > > > > > > not be able to read database metadata (at least). > > > > > > > > > > > > > > > > > > > > > > > > *Romain Manni-Bucau* > > > > > > > > > > > > *Twitter: @rmannibucau < > > https://twitter.com/rmannibucau > > > >* > > > > > > > > > > > > *Blog: **http://rmannibucau.wordpress.com/*< > > > > > > > > > > > > http://rmannibucau.wordpress.com/> > > > > > > > > > > > > *LinkedIn: **http://fr.linkedin.com/in/rmannibucau* > > > > > > > > > > > > *Github: https://github.com/rmannibucau* > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > 2013/7/1 James Green <[email protected]> > > > > > > > > > > > > > > > > > > > > > > > > > I've suppressed the RuntimeExceptions encountered > as > > > EJBs > > > > > > fire > > > > > > > > and > > > > > > > > > > > access > > > > > > > > > > > > > JPA, however I have a new problem now: > > > > > > > > > > > > > > > > > > > > > > > > > > Caused by: <openjpa-2.2.0-r422266:1244990 nonfatal > > user > > > > > > error> > > > > > > > > > > > > > org.apache.openjpa.persistence.ArgumentException: > An > > > > error > > > > > > > > occurred > > > > > > > > > > > while > > > > > > > > > > > > > parsing the query filter "SELECT a FROM Account a". > > > Error > > > > > > > > message: > > > > > > > > > > The > > > > > > > > > > > > name > > > > > > > > > > > > > "Account" is not a recognized entity or identifier. > > > Known > > > > > > > entity > > > > > > > > > > names: > > > > > > > > > > > > [] > > > > > > > > > > > > > > > > > > > > > > > > > > It seems the JPA component was unable to map my > > @Entity > > > > > > classes > > > > > > > > > > because > > > > > > > > > > > > the > > > > > > > > > > > > > connection did not exist at startup. What do I need > > to > > > do > > > > > to > > > > > > > work > > > > > > > > > > > around > > > > > > > > > > > > > this? > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > On 1 July 2013 12:07, Romain Manni-Bucau < > > > > > > > [email protected]> > > > > > > > > > > > wrote: > > > > > > > > > > > > > > > > > > > > > > > > > > > yep > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > basically get injected the timerservice ( > > > > > > > > > > > > > > > > > > > > > > > > http://docs.oracle.com/javaee/6/api/javax/ejb/TimerService.html > > > > > > > > > ), > > > > > > > > > > in > > > > > > > > > > > > > your > > > > > > > > > > > > > > init method you try to get your data, if not > > trigger > > > a > > > > > > later > > > > > > > > > > > > > > invocation ( > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > http://docs.oracle.com/javaee/6/api/javax/ejb/TimerService.html#createSingleActionTimer(java.util.Date > > > > > > > > > > > > > > , > > > > > > > > > > > > > > javax.ejb.TimerConfig)). While it fails trigger > > > another > > > > > one > > > > > > > > when > > > > > > > > > > > > invoked. > > > > > > > > > > > > > > When it succeeds you are done. > > > > > > > > > > > > > > > > > > > > > > > > > > > > *Romain Manni-Bucau* > > > > > > > > > > > > > > *Twitter: @rmannibucau < > > > > https://twitter.com/rmannibucau > > > > > >* > > > > > > > > > > > > > > *Blog: **http://rmannibucau.wordpress.com/*< > > > > > > > > > > > > > > http://rmannibucau.wordpress.com/> > > > > > > > > > > > > > > *LinkedIn: ** > > http://fr.linkedin.com/in/rmannibucau* > > > > > > > > > > > > > > *Github: https://github.com/rmannibucau* > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > 2013/7/1 James Green <[email protected]> > > > > > > > > > > > > > > > > > > > > > > > > > > > > > In our case we have two EJBs, both @Singleton > and > > > > > > @Startup, > > > > > > > > one > > > > > > > > > > > > depends > > > > > > > > > > > > > > on > > > > > > > > > > > > > > > the other. One is a cache façade and the other > > > loads > > > > > data > > > > > > > via > > > > > > > > > JPA > > > > > > > > > > > and > > > > > > > > > > > > > > feeds > > > > > > > > > > > > > > > it into the cache. An external schedule fires a > > > > servlet > > > > > > > that > > > > > > > > > > > reloads > > > > > > > > > > > > > the > > > > > > > > > > > > > > > cache from the database. > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > What's happening is that without MySQL we see > EJB > > > > > > > exceptions > > > > > > > > > that > > > > > > > > > > > > they > > > > > > > > > > > > > > > cannot be created and thus we are dead. > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > I've just tried adding autoReconnect=true > inside > > a > > > > > > > <Resource> > > > > > > > > > but > > > > > > > > > > > > that > > > > > > > > > > > > > > made > > > > > > > > > > > > > > > no difference. I also tried adding > > > > ,autoReconnect=true > > > > > to > > > > > > > > > > > > > > > ConnectionProperties and > > > ConnectionFactoryProperties > > > > > > > without > > > > > > > > > any > > > > > > > > > > > > change > > > > > > > > > > > > > > but > > > > > > > > > > > > > > > I'm not convinced that would have fixed the > > problem > > > > > here. > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > Is it instead the case that within the EJB I > > should > > > > be > > > > > > > > trapping > > > > > > > > > > > > > > > connectivity problems such as > > PersistenceException > > > > and > > > > > > > > allowing > > > > > > > > > > the > > > > > > > > > > > > > > > containing to gracefully start up and naturally > > > keep > > > > > > trying > > > > > > > > > > anyway? > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > James > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > On 28 June 2013 17:10, José Luis Cetina < > > > > > > > > [email protected]> > > > > > > > > > > > > wrote: > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > I had a similar problem and what i did was > set > > > the > > > > > > > > > > autoReconnect > > > > > > > > > > > > > > > attribute > > > > > > > > > > > > > > > > to true en my tomee.xml datasource. > > > > > > > > > > > > > > > > What do you mean with retry until the > > connection > > > > > > springs > > > > > > > to > > > > > > > > > > life? > > > > > > > > > > > > do > > > > > > > > > > > > > > you > > > > > > > > > > > > > > > > have some schedules or jobs running and want > to > > > > retry > > > > > > > again > > > > > > > > > > when > > > > > > > > > > > > the > > > > > > > > > > > > > > > > connection is available again? or just want > > when > > > > > > somebody > > > > > > > > > click > > > > > > > > > > > any > > > > > > > > > > > > > > > button > > > > > > > > > > > > > > > > the app can connect again (this was my > case)?? > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > 2013/6/28 Romain Manni-Bucau < > > > > [email protected]> > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > With an ejb timer? > > > > > > > > > > > > > > > > > Le 28 juin 2013 17:46, "James Green" < > > > > > > > > > > [email protected] > > > > > > > > > > > > > > > > > > > > > > > > a > > > > > > > > > > > > > > > écrit > > > > > > > > > > > > > > > > : > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > Hopefully a quick one. > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > On boot our application attempts to read > > data > > > > > > > through a > > > > > > > > > JPA > > > > > > > > > > > > > > > > > EntityManager. > > > > > > > > > > > > > > > > > > If the database connection fails at this > > > point > > > > > the > > > > > > > > entire > > > > > > > > > > > > > > application > > > > > > > > > > > > > > > > is > > > > > > > > > > > > > > > > > > effectively dead. > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > Is there a way to essentially ask the > > > database > > > > > > layer > > > > > > > to > > > > > > > > > > retry > > > > > > > > > > > > > until > > > > > > > > > > > > > > > the > > > > > > > > > > > > > > > > > > connection springs to life? > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > Thanks, > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > James > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > -- > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > ------------------------------------------------------------------- > > > > > > > > > > > > > > > > *SCJA. José Luis Cetina* > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > ------------------------------------------------------------------- > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > -- > > > > > > > > > > > > > > > ------------------------------------------------------------------- > > > > > > > > > > *SCJA. José Luis Cetina* > > > > > > > > > > > > > > > ------------------------------------------------------------------- > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > -- > > > > > > > > > > > ------------------------------------------------------------------- > > > > > > > > *SCJA. José Luis Cetina* > > > > > > > > > > > ------------------------------------------------------------------- > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > -- > > > > > ------------------------------------------------------------------- > > > > > *SCJA. José Luis Cetina* > > > > > ------------------------------------------------------------------- > > > > > > > > > > > > > > >
