Hello, I switched my model from FrontBase to PostgreSQL and it works great.
Does someone use Cayenne 4.1 with FrontbaseSQL successfully ? Is there something specific to know ? Thank’s for any tip, Jérémy > Le 14 avr. 2021 à 23:05, Jérémy DE ROYER <jeremy.dero...@ingencys.net> a > écrit : > > Hi all, > > I’m trying to find a solution for the (temporary ?) lack of horizontal > inheritance so I did model vertical inheritance following : > > https://cayenne.apache.org/docs/3.0/modeling-vertical-inheritance.html > > using a Frontbase database. > > I did : > - create the model, > - generate the database, > - fix lack of jars and other things like username, password, jdbc driver > > The demo code below starts well and connects to database... > > try { > ServerRuntime cayenneRuntime = ServerRuntime.builder() > .addConfig("cayenne-CayenneTest.xml") > .build(); > > ObjectContext context = cayenneRuntime.newContext(); > > Book _newBook = context.newObject(Book.class); > _newBook.setTitle("Nouveau Book"); > _newBook.setCreated(new Date()); > > context.commitChanges(); > > EBook _newEBook = context.newObject(EBook.class); > _newEBook.setTitle("Nouveau EBook"); > _newEBook.setCreated(new Date()); > _newEBook.setDownloadUrl("https://www.google.fr/";); > > context.commitChanges(); > > PaperBook _newPaperBook = context.newObject(PaperBook.class); > _newPaperBook.setTitle("Nouveau PaperBook"); > _newPaperBook.setCreated(new Date()); > _newPaperBook.setShippingWeight(1000); > > context.commitChanges(); > > List<Book> _books = ObjectSelect.query(Book.class).select(context); > > System.out.println("** ALL **"); > > for (Book currentBook : _books) > { > System.out.println(currentBook.getTitle() + " created on " + > currentBook.getCreated()); > } > } > catch (Exception e) { > System.out.println("An error occured : " + e.getMessage()); > e.printStackTrace(); > } > > …but throws this exception > > An error occured : [v.4.1 Jul 14 2020 10:40:45] Commit Exception > org.apache.cayenne.CayenneRuntimeException: [v.4.1 Jul 14 2020 10:40:45] > Commit Exception > at org.apache.cayenne.access.DataContext.flushToParent(DataContext.java:774) > at org.apache.cayenne.access.DataContext.commitChanges(DataContext.java:691) > at your.app.Application.<init>(Application.java:50) > at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) > at > sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) > at > sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) > at java.lang.reflect.Constructor.newInstance(Constructor.java:423) > at java.lang.Class.newInstance(Class.java:442) > at com.webobjects.appserver.WOApplication.main(WOApplication.java:547) > at your.app.Application.main(Application.java:25) > Caused by: java.lang.NullPointerException > at > org.apache.cayenne.access.jdbc.SQLTemplateAction.execute(SQLTemplateAction.java:242) > at > org.apache.cayenne.access.jdbc.SQLTemplateAction.runWithNamedParametersBatch(SQLTemplateAction.java:179) > at > org.apache.cayenne.access.jdbc.SQLTemplateAction.performAction(SQLTemplateAction.java:111) > at > org.apache.cayenne.access.DataNodeQueryAction.runQuery(DataNodeQueryAction.java:97) > at org.apache.cayenne.access.DataNode.performQueries(DataNode.java:273) > at > org.apache.cayenne.dba.frontbase.FrontBasePkGenerator.longPkFromDatabase(FrontBasePkGenerator.java:143) > at org.apache.cayenne.dba.JdbcPkGenerator.generatePk(JdbcPkGenerator.java:220) > at > org.apache.cayenne.access.DataDomainInsertBucket.createPermIds(DataDomainInsertBucket.java:168) > at > org.apache.cayenne.access.DataDomainInsertBucket.appendQueriesInternal(DataDomainInsertBucket.java:76) > at > org.apache.cayenne.access.DataDomainSyncBucket.appendQueries(DataDomainSyncBucket.java:78) > at > org.apache.cayenne.access.DataDomainFlushAction.preprocess(DataDomainFlushAction.java:185) > at > org.apache.cayenne.access.DataDomainFlushAction.flush(DataDomainFlushAction.java:143) > at org.apache.cayenne.access.DataDomain.onSyncFlush(DataDomain.java:624) > at org.apache.cayenne.access.DataDomain.onSyncNoFilters(DataDomain.java:594) > at > org.apache.cayenne.access.DataDomain$DataDomainSyncFilterChain.onSync(DataDomain.java:822) > at > org.apache.cayenne.tx.TransactionFilter.lambda$onSync$0(TransactionFilter.java:61) > at > org.apache.cayenne.tx.DefaultTransactionManager$BaseTransactionHandler.performInTransaction(DefaultTransactionManager.java:183) > at > org.apache.cayenne.tx.DefaultTransactionManager$BaseTransactionHandler.performInNewTransaction(DefaultTransactionManager.java:155) > at > org.apache.cayenne.tx.DefaultTransactionManager$NestedTransactionHandler.handle(DefaultTransactionManager.java:98) > at > org.apache.cayenne.tx.DefaultTransactionManager.performInTransaction(DefaultTransactionManager.java:65) > at > org.apache.cayenne.tx.DefaultTransactionManager.performInTransaction(DefaultTransactionManager.java:43) > at org.apache.cayenne.tx.TransactionFilter.onSync(TransactionFilter.java:61) > at > org.apache.cayenne.access.DataDomain$DataDomainSyncFilterChain.onSync(DataDomain.java:821) > at org.apache.cayenne.access.DataDomain.onSync(DataDomain.java:581) > at org.apache.cayenne.access.DataContext.flushToParent(DataContext.java:742) > ... 9 more > > It seem’s to be related to pk generation so I try a select unqiue from Book > in FrontBase and it worked lije a charm. > > Any idea ? > > Many thank’s, > > Jérémy
