Did you make any progress on this issue?
On 04.12.2017 17:43, Diogo Luzzardi de Carvalho wrote:
humm, at moment I call the appLifeCycle.init() the PersistFilter is
already configured in the application because it is configured at the
MainModule class configure method. There is any other way to make the
persistService to start?
On Monday, December 4, 2017 at 2:04:00 PM UTC-2, scl wrote:
This is what I mentioned before.
You cannot use any of the JPA stuff until PersistService.start()
has been called.
This will be called by the PersistFilter.init().
So you have to wait with the appLifeCycle.init() until after the
init() method of PersistFilter
On 04.12.2017 16:58, Diogo Luzzardi de Carvalho wrote:
Unfortunately it is not. I notice that when I change my code to
do the following:
|
injector = Guice.createInjector(new
MainModule(String.format("%s/WEB-INF/app",
getServletContext().getRealPath("/")), getServletContext()));
UnitOfWork unitOfWork = injector.getInstance(UnitOfWork.class);
System.out.println(unitOfWork);
unitOfWork.begin();
try {
appLifeCycle = injector.getInstance(AppLifeCycle.class);
appLifeCycle.init(getServletContext());
} finally {
unitOfWork.end();
}
return injector;
|
The injector was able to inject the UnitOfWork but when I call
the method unitOfWork.begin() the exception occurs at line 77 of
the JpaPersistService.
On Monday, December 4, 2017 at 1:24:10 PM UTC-2, scl wrote:
Is this an open source project?
If sou you could point me to the repo and I can have a look.
On 04.12.2017 16:22, Diogo Luzzardi de Carvalho wrote:
Hi,
I tried both of your solutions, and the nullpointer keeps
happen. Also I debug the application and I installed the
JpaPersistModule before I try to run the code when the
exception happens.
regards
Diogo
On Friday, December 1, 2017 at 8:42:53 PM UTC-2, scl wrote:
A second cause could be that the PersistenceService has
not been started yet.
The persistence service is started by the
PersistFiler.init() method.
Unfortunately there is no way of checking if the
PersistanceService is already started. And trying to
start it twice will cause an exception the be thrown.
So my advice:
Make sure to delay the accessing of the DB until after
the PersistFiler.init() method and wrap your code in a
UnitOfWork.
The simplest trick is to register another ServletFilter
after the PersistFilter and place your code in the
init() method of this filter...
You may also have a look at Onami Persist which is an
alternative implementation (but without @Finder)
On 01.12.2017 23:25, Diogo Luzzardi de Carvalho wrote:
On Friday, December 1, 2017 at 8:18:46 PM UTC-2, Diogo
Luzzardi de Carvalho wrote:
|
java.lang.NullPointerException
at
com.google.inject.persist.jpa.JpaPersistService.begin(JpaPersistService.java:77)
at
com.google.inject.persist.jpa.JpaLocalTxnInterceptor.invoke(JpaLocalTxnInterceptor.java:53)
at
com.app.guice.AppGuiceServletContextListener.contextInitialized(AppGuiceServletContextListener.java:60)
at
org.mortbay.jetty.handler.ContextHandler.startContext(ContextHandler.java:548)
at
org.mortbay.jetty.servlet.Context.startContext(Context.java:136)
at
org.mortbay.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1234)
at
org.mortbay.jetty.handler.ContextHandler.doStart(ContextHandler.java:517)
at
org.mortbay.jetty.webapp.WebAppContext.doStart(WebAppContext.java:460)
at
org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50)
at
org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:130)
at org.mortbay.jetty.Server.doStart(Server.java:222)
at
org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50)
at com.app.Start.start(Start.java:126)
at com.app.Start.main(Start.java:194)
|
Follows my servlet context listener:
|
package com.app.guice;
import javax.servlet.ServletContext;
import javax.servlet.ServletContextEvent;
import org.mortbay.jetty.Server;
import com.app.setup.AppLifeCycle;
import com.google.inject.Guice;
import com.google.inject.Injector;
import com.google.inject.Provides;
import com.google.inject.Singleton;
import
com.google.inject.servlet.GuiceServletContextListener;
public class AppGuiceServletContextListener extends
GuiceServletContextListener {
private AppLifeCycle appLifeCycle;
private Server server;
private ServletContext servletContext;
private Injector injector;
public AppGuiceServletContextListener(Server server) {
super();
this.server = server;
}
@Override
public void contextDestroyed(ServletContextEvent ctx) {
super.contextDestroyed(ctx);
if(appLifeCycle!= null) {
appLifeCycle.destroy();
}
}
@Override
public void contextInitialized(ServletContextEvent
servletContextEvent) {
servletContext =
servletContextEvent.getServletContext();
super.contextInitialized(servletContextEvent);
appLifeCycle =
injector.getInstance(AppLifeCycle.class);
appLifeCycle.init(servletContext);
}
@Provides
@Singleton
Server provideServer(Injector injector) {
final Server server = this.server;
injector.injectMembers(server);
returnserver;
}
@Override
protected Injector getInjector() {
System.out.println(servletContext);
if (injector == null)
injector = Guice.createInjector(new
MainModule(String.format("%s/WEB-INF/app",
servletContext.getRealPath("/")), servletContext));
returninjector;
}
}
|
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