@Produces and @IOCProvider Fail Injection

[crinaldi]

I'm developing with Errai 2.2.0.Final and I need to make a few providers.

I made the example of the theory:

1) ---- Provider -----

public interface TimeService {
  public String getTime();
}
@IOCProvider
@Singleton
public class TimeServiceProvider implements Provider<TimeService> {
  @Override
  public TimeService get() {
    return new TimeService() {
      public String getTime() {
        return "It's midnight somewhere!";
      }
    };
  }
}
Then inject it as follows in my application:
@EntryPoint
public class App {
    @Inject
    private Instance<TimeService> time;
   @PostConstruct
    public void init() {
         TimeService a = Preconditions.checkNotNull(time.get(), "TimeService is Null");
         GWT.log(a.getTime());
    }
}
This gives the following error in Development Mode:
java.lang.RuntimeException: critical error in IOC container bootstrap
 at org.jboss.errai.ioc.client.Container.bootstrapContainer(Container.java:69)
 at org.jboss.errai.ioc.client.Container.onModuleLoad(Container.java:34)
 at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
 at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
 at java.lang.reflect.Method.invoke(Method.java:601)
 at com.google.gwt.dev.shell.ModuleSpace.onLoad(ModuleSpace.java:396)
 at com.google.gwt.dev.shell.OophmSessionHandler.loadModule(OophmSessionHandler.java:200)
 at com.google.gwt.dev.shell.BrowserChannelServer.processConnection(BrowserChannelServer.java:525)
 at com.google.gwt.dev.shell.BrowserChannelServer.run(BrowserChannelServer.java:363)
 at java.lang.Thread.run(Thread.java:722)
Caused by: org.jboss.errai.ioc.client.container.IOCResolutionException: no matching bean instances for: com.logikas.samples.errai.client.presenter.configure.TimeService
 at org.jboss.errai.ioc.client.container.IOCBeanManager.lookupBean(IOCBeanManager.java:475)
 at org.jboss.errai.enterprise.client.cdi.InstanceProvider$InstanceImpl.get(InstanceProvider.java:86)
 at com.logikas.samples.errai.client.local.App.init(App.java:32)
2) -- @Produces ------
I also tried with @ Produces as follows:
 @Produces
 @Singleton
 public EventBus getEventBus(){
      return new SimpleEventBus();
 }
 But when the EventBus injected, can not find the reference.
....
.....
   @Inject
   private Provider<EventBus> bus;
   @PostConstruct
   private void init(){
        EventBus b = Preconditions.checkNotNull(bus.get(), "Event Buss is Null");
   }
java.lang.RuntimeException: critical error in IOC container bootstrap
 at org.jboss.errai.ioc.client.Container.bootstrapContainer(Container.java:69)
 at org.jboss.errai.ioc.client.Container.onModuleLoad(Container.java:34)
 at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
 at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
 at java.lang.reflect.Method.invoke(Method.java:601)
 at com.google.gwt.dev.shell.ModuleSpace.onLoad(ModuleSpace.java:396)
 at com.google.gwt.dev.shell.OophmSessionHandler.loadModule(OophmSessionHandler.java:200)
 at com.google.gwt.dev.shell.BrowserChannelServer.processConnection(BrowserChannelServer.java:525)
 at com.google.gwt.dev.shell.BrowserChannelServer.run(BrowserChannelServer.java:363)
 at java.lang.Thread.run(Thread.java:722)
Caused by: org.jboss.errai.ioc.client.container.IOCResolutionException: no matching bean instances for: com.google.gwt.event.shared.EventBus
 at org.jboss.errai.ioc.client.container.IOCBeanManager.lookupBean(IOCBeanManager.java:475)
Thanks for advance!!!!

[cbrock]

Can you show a complete paste of the entire TimeServiceProvider by any chance? 

[crinaldi]

Mike, thank for answering..

Here the complete code:

//Interface TimeService

public interface TimeService {

    public String getTime();

}

------------------------------------------

import com.logikas.samples.errai.client.presenter.configure.TimeService;

import javax.inject.Provider;

import javax.inject.Singleton;

import org.jboss.errai.ioc.client.api.IOCProvider;

/**

* Description of TimeServiceProvider

*

* @see TimeService

* @author Cristian Rinaldi <[e-mail]>

*/

@IOCProvider

@Singleton

public class TimeServiceProvider implements Provider<TimeService> {

    @Override

    public TimeService get() {

       return new TimeService() {

            public String getTime() {

               return "Is time!!!!!!!!";

           }

        };

   }

}

--------------------------------------------------------------------

import com.google.common.base.Preconditions;

import com.google.gwt.core.client.GWT;

import com.logikas.samples.errai.client.presenter.configure.TimeService;

import javax.annotation.PostConstruct;

import javax.inject.Inject;

import javax.inject.Provider;

import org.jboss.errai.ioc.client.api.EntryPoint;

/**

* Description of App

*

* @author Cristian Rinaldi <[e-mail]>

*/

@EntryPoint

public class App {

    @Inject

    private Provider<TimeService> timeService;

    @PostConstruct

    public void init() {

        TimeService tm = Preconditions.checkNotNull(timeService.get(), "Time Service is null");

        GWT.log(tm.getTime());

    }

}

This is the error in compilation time:

Generating Extensions Bootstrapper...

generating IOC bootstrapping class...

reachability analysis disabled. errai may generate unnecessary code.

enable reachability analysis with -Derrai.compile.perf.perform_reachability_analysis=true

               Checking ErraiApp.properties for configured types ...

org.jboss.errai.ioc.rebind.ioc.exception.UnsatisfiedDependenciesException:  @> com.logikas.samples.errai.client.local.App

- field org.jboss.errai.codegen.meta.MetaField:com.logikas.samples.errai.client.local.App.timeService could not be satisfied for type: javax.inject.Provider

  Message: ambiguous injection type (multiple injectors resolved): javax.inject.Provider  @Any  @Default :

     matching> org.jboss.errai.ioc.rebind.ioc.injector.TypeInjector:com.logikas.samples.errai.client.provider.TimeServiceProvider  @Any  @Default

     matching> org.jboss.errai.ioc.rebind.ioc.injector.ContextualProviderInjector:javax.enterprise.inject.Instance  @Any  @Default

  Note: configure an alternative to take precedence or remove all but one matching bean.

          at org.jboss.errai.ioc.rebind.ioc.exception.UnsatisfiedDependenciesException.createWithSingleFieldFailure(UnsatisfiedDependenciesException.java:39)

          at org.jboss.errai.ioc.rebind.ioc.injector.api.InjectionTask.doTask(InjectionTask.java:119)

          at org.jboss.errai.ioc.rebind.ioc.injector.InjectUtil.handleInjectionTasks(InjectUtil.java:160)

          at org.jboss.errai.ioc.rebind.ioc.injector.InjectUtil.access$000(InjectUtil.java:70)

          at org.jboss.errai.ioc.rebind.ioc.injector.InjectUtil$2.generateConstructor(InjectUtil.java:148)

          at org.jboss.errai.ioc.rebind.ioc.injector.TypeInjector._getType(TypeInjector.java:160)

          at org.jboss.errai.ioc.rebind.ioc.injector.TypeInjector.getBeanInstance(TypeInjector.java:109)

          at org.jboss.errai.ioc.rebind.ioc.bootstrapper.IOCProcessorFactory$4.handle(IOCProcessorFactory.java:377)

          at org.jboss.errai.ioc.rebind.ioc.bootstrapper.IOCProcessorFactory$6.process(IOCProcessorFactory.java:593)

          at org.jboss.errai.ioc.rebind.ioc.bootstrapper.IOCProcessorFactory.process(IOCProcessorFactory.java:543)

          at org.jboss.errai.ioc.rebind.ioc.bootstrapper.IOCBootstrapGenerator.generateExtensions(IOCBootstrapGenerator.java:354)

          at org.jboss.errai.ioc.rebind.ioc.bootstrapper.IOCBootstrapGenerator._generate(IOCBootstrapGenerator.java:328)

          at org.jboss.errai.ioc.rebind.ioc.bootstrapper.IOCBootstrapGenerator.generate(IOCBootstrapGenerator.java:157)

          at org.jboss.errai.ioc.rebind.ioc.bootstrapper.IOCGenerator.generateIOCBootstrapClass(IOCGenerator.java:96)

          at org.jboss.errai.ioc.rebind.ioc.bootstrapper.IOCGenerator.generate(IOCGenerator.java:65)

          at com.google.gwt.core.ext.GeneratorExtWrapper.generate(GeneratorExtWrapper.java:48)

          at com.google.gwt.core.ext.GeneratorExtWrapper.generateIncrementally(GeneratorExtWrapper.java:60)

          at com.google.gwt.dev.javac.StandardGeneratorContext.runGeneratorIncrementally(StandardGeneratorContext.java:647)

          at com.google.gwt.dev.cfg.RuleGenerateWith.realize(RuleGenerateWith.java:41)

          at com.google.gwt.dev.shell.StandardRebindOracle$Rebinder.rebind(StandardRebindOracle.java:78)

               [ERROR] Error generating extensions

org.jboss.errai.ioc.rebind.ioc.exception.UnsatisfiedDependenciesException:  @> com.logikas.samples.errai.client.local.App

- field org.jboss.errai.codegen.meta.MetaField:com.logikas.samples.errai.client.local.App.timeService could not be satisfied for type: javax.inject.Provider

  Message: ambiguous injection type (multiple injectors resolved): javax.inject.Provider  @Any  @Default :

     matching> org.jboss.errai.ioc.rebind.ioc.injector.TypeInjector:com.logikas.samples.errai.client.provider.TimeServiceProvider  @Any  @Default

     matching> org.jboss.errai.ioc.rebind.ioc.injector.ContextualProviderInjector:javax.enterprise.inject.Instance  @Any  @Default

  Note: configure an alternative to take precedence or remove all but one matching bean.

----------------------------------------------------------------------------------------------------------------------------

Other problem is with injection of EventBus. But for this, I did not make a Provider, only anotate the method with @Produces, but in the moment of injection, no find of implementation. The build process finishes successfully, the error occurs in Development Mode when the application loads. EventBus is not a Interface is a concrete class.

Below there some source code, the exemplifies  what I mean:

import com.google.gwt.event.shared.EventBus;

import com.google.gwt.event.shared.SimpleEventBus;

import javax.annotation.PostConstruct;

import javax.enterprise.inject.Produces;

import javax.inject.Singleton;

/**

* Description of MVPInitializer

* @author Cristian Rinaldi <[e-mail]>

*/

@Singleton

public class MVPInitializer {

    @Produces

    @Singleton

    public EventBus getEventBus(){

        return new SimpleEventBus();

    }

    @PostConstruct

    private void init(){

      //TODO       

    }

}

-------------------------------------

import com.google.common.base.Preconditions;

import com.google.gwt.core.client.GWT;

import com.google.gwt.event.shared.EventBus;

import javax.annotation.PostConstruct;

import javax.inject.Inject;

import javax.inject.Provider;

import org.jboss.errai.ioc.client.api.EntryPoint;

/**

* Description of App

*

* @author Cristian Rinaldi <[e-mail]>

*/

@EntryPoint

public class App {

    @Inject

    private Provider<EventBus> eventBus;

    @PostConstruct

    public void init() {

        EventBus eb = Preconditions.checkNotNull(eventBus.get(), "EventBus is null");

        GWT.log(eb.toString());

   }

}

The Error:

java.lang.RuntimeException: critical error in IOC container bootstrap

at org.jboss.errai.ioc.client.Container.bootstrapContainer(Container.java:69)

at org.jboss.errai.ioc.client.Container.onModuleLoad(Container.java:34)

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

at java.lang.reflect.Method.invoke(Method.java:601)

at com.google.gwt.dev.shell.ModuleSpace.onLoad(ModuleSpace.java:396)

at com.google.gwt.dev.shell.OophmSessionHandler.loadModule(OophmSessionHandler.java:200)

at com.google.gwt.dev.shell.BrowserChannelServer.processConnection(BrowserChannelServer.java:525)

at com.google.gwt.dev.shell.BrowserChannelServer.run(BrowserChannelServer.java:363)

at java.lang.Thread.run(Thread.java:722)

Caused by: org.jboss.errai.ioc.client.container.IOCResolutionException: no matching bean instances for: com.google.gwt.event.shared.EventBus

at org.jboss.errai.ioc.client.container.IOCBeanManager.lookupBean(IOCBeanManager.java:475)

at org.jboss.errai.enterprise.client.cdi.InstanceProvider$InstanceImpl.get(InstanceProvider.java:86)

at com.logikas.samples.errai.client.local.App.init(App.java:27)

Thanks a lot!!

[cbrock]

The problem as I see it is you're trying to inject the Provider directly. While a top-level provider is wired like a regular bean, it's outside of the regular creational context. Have you tried just directly injecting EventBus?

ie. @Inject EventBus eventBus; into your App class? The bean manager will take care of calling provide() for you.

[crinaldi]

Mike, thanks for response....!!

I try with @Inject EventBus and work!!!!!

But my question is:

   It is conceptually wrong to inject a Provider of the way I did?  or this is a bug and will be covered?

Mike, I take this to say:

  The Framework that are developing is AWESOME!

Congratulations!!! and Thanks!!!