Hey All!
I am trying to use an embedded Derby database in my platform
application, but cannot get it to work. I have worked through the CRUD
tutorial <https://platform.netbeans.org/tutorials/nbm-crud.html> using
the sample Derby database and it works flawlessly. However, when I try
to do this with my embedded database, it blows up.
After I add my viewer window, run the application, and the window shows
up as expected. Then, when I start adding in the persistence/database
access code, I get the following error:
A java.lang.IllegalStateException exception has occurred.
Click Show Details or see the messages.log file located in your
/home/sean/NetBeansProjects/TestDBApp/build/testuserdir/var/log folder.
This is accompanied by this stacktrace:
java.lang.IllegalStateException: Cannot find TopComponent with
preferredID CustomerViewerTopComponent, see IDE log for more details.
at
org.openide.windows.OpenComponentAction.actionPerformed(OpenComponentAction.java:69)
at
org.openide.awt.AlwaysEnabledAction$1.run(AlwaysEnabledAction.java:174)
at org.openide.util.actions.ActionInvoker$1.run(ActionInvoker.java:70)
at
org.openide.util.actions.ActionInvoker.doPerformAction(ActionInvoker.java:91)
at
org.openide.util.actions.ActionInvoker.invokeAction(ActionInvoker.java:74)
at
org.openide.awt.AlwaysEnabledAction.actionPerformed(AlwaysEnabledAction.java:177)
at
javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2022)
at
javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2348)
at
javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:402)
at
javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:259)
at javax.swing.AbstractButton.doClick(AbstractButton.java:376)
at
javax.swing.plaf.basic.BasicMenuItemUI.doClick(BasicMenuItemUI.java:842)
at
javax.swing.plaf.basic.BasicMenuItemUI$Handler.mouseReleased(BasicMenuItemUI.java:886)
at java.awt.Component.processMouseEvent(Component.java:6539)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3324)
at java.awt.Component.processEvent(Component.java:6304)
at java.awt.Container.processEvent(Container.java:2239)
at java.awt.Component.dispatchEventImpl(Component.java:4889)
at java.awt.Container.dispatchEventImpl(Container.java:2297)
at java.awt.Component.dispatchEvent(Component.java:4711)
at
java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4904)
at
java.awt.LightweightDispatcher.processMouseEvent(Container.java:4535)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4476)
at java.awt.Container.dispatchEventImpl(Container.java:2283)
at java.awt.Window.dispatchEventImpl(Window.java:2746)
at java.awt.Component.dispatchEvent(Component.java:4711)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:760)
at java.awt.EventQueue.access$500(EventQueue.java:97)
at java.awt.EventQueue$3.run(EventQueue.java:709)
at java.awt.EventQueue$3.run(EventQueue.java:703)
at java.security.AccessController.doPrivileged(Native Method)
at
java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:74)
at
java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:84)
at java.awt.EventQueue$4.run(EventQueue.java:733)
at java.awt.EventQueue$4.run(EventQueue.java:731)
at java.security.AccessController.doPrivileged(Native Method)
at
java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:74)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:730)
at
org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:136)
[catch] at
java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:205)
at
java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
at
java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
at
java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)
I commented out all of the code that I placed in the constructor of the
CustomerViewerTopComponent, then started adding back the code, one line
at a time. This exception is actually thrown at the very first line:
EntityManager entityManager =
Persistence.createEntityManagerFactory("CustomerLibraryPU").createEntityManager();
I have all appropriate imports, and my annotations are as follows:
@ConvertAsProperties(
dtd =
"-//com.pekinsoft.nwind.db.customer.viewer//CustomerViewer//EN",
autostore = false
)
@TopComponent.Description(
preferredID = "CustomerViewerTopComponent",
iconBase =
"com/pekinsoft/nwind/db/customer/viewer/customers16.png",
persistenceType = TopComponent.PERSISTENCE_ALWAYS
)
@TopComponent.Registration(mode = "explorer", openAtStartup = false)
@ActionID(category = "Window", id =
"com.pekinsoft.nwind.db.customer.viewer.CustomerViewerTopComponent")
@ActionReference(path = "Menu/Window/Administration" /*, position = 333 */)
@TopComponent.OpenActionRegistration(
displayName = "#CTL_CustomerViewerAction",
preferredID = "CustomerViewerTopComponent"
)
@Messages({
"CTL_CustomerViewerAction=CustomerViewer",
"CTL_CustomerViewerTopComponent=CustomerViewer Window",
"HINT_CustomerViewerTopComponent=This is a CustomerViewer window"
})
As can clearly be seen, the preferredID = "CustomerViewerTopComponent"
is present...twice, to be exact, as generated by the Window wizard.
My next step was, since I had only created the tables and they were
empty, was to add a test record into my CUSTOMERS table, thinking that
maybe this was due to there not being any data in the table. However, I
still received this exception.
My Persistence Unit is defined with the following connection string:
jdbc:derby:testdb;create=true;
I am using Oracle Java 8, NetBeans 12.0 (64-bit) for both. I am running
on MX Linux with a CORE i7 (7th Gen), 8GiB of RAM, 1TB HDD. All kernel
updates are in place and at version:
uname -a: Linux omen 4.19.0-12-amd64 #1 SMP Debian 4.19.152-1
(2020-10-18) x86_64 GNU/Linux
I am at a loss as to why this is not working and am wondering if it is
just that the embedded Derby database is not working with NB12.0 for
some reason. Any help anyone can provide is greatly appreciated. Thank
you all in advance.
Sean C.
