Questions Tagged With ivy

Subscribe when login ivy user ?

trungdv — Mon, 16 Apr 2018 00:31:50 -0400

Hi all

Normally we use Ivy.session().loginSessionUser(userName, password) to login. And we have common modules to do common stuff like this (wrap by Ivy component).

My question is: Does ivy support a mechanism that we can subscribe this event and we'll be notified when a ivy user is logged in?

Thanks

How to load ivy class to class loader on maven plugin

trungdv — Thu, 29 Mar 2018 11:01:23 -0400

Hi ivyteam

I'm building a maven plugin to scanning java class in ivy project to generate some business documentation (by reading the annotation in classes). It's seem to work well with java class.

There is only one problem with some classes which belong to ivy, for example a java class that extends from ch.ivyteam.ivy.scripting.objects.CompositeObject or a class that references from another class from other ivy project, in maven plugin it could not load those classes like that then throw NoClassDefFoundException, I guess that because CompositeObject does not available on current class loader yet.

My question is: How could i resolve those ivy dependencies to load those class? how project-build-plugin can compile them or is there any solutions?

Thanks

Can we hide Webservice startlink from index page?

trungdv — Thu, 01 Feb 2018 06:12:49 -0500

Hi all

I have the webservice in my project and by default i will see it on index page like this

Is there any way to hide it from this page like startlink?

How to verify username/password of user without logging in?

trungdv — Thu, 01 Feb 2018 06:00:58 -0500

Hi all

Normally when we want to check whether user is authenticated ivy user or not, we use this api:

Ivy.session().loginSessionUser(userName, password)

But this api will also change the current login user to new one.

Is there any other api to verify user/pass without logout current user?

Because my process is an ivy webservice then it's run with system permission, if i use above api to verify another user it will throw exception that i can't logout of system user.

Thanks

Can i turn on/off webservice authentication programmatically

trungdv — Thu, 01 Feb 2018 03:06:57 -0500

Hi all

We have a webservice which implemented on ivy. This service serve for many customer. As default it required basic-auth. Now some of customers dont want to be authenticated when calling it, so we intend to introduce the global var where admin can allow to turn on/off this feature.

Can we go with that way and how to turn off/on this authentication type programmatically?

Thanks

Zombie task is created after finishing callable subprocess. How to avoid it?

trungdv — Fri, 27 Oct 2017 01:55:45 -0400

Hi all

We're using ivy 6.3, and have face the problem that we implement a restfulAPI by java code, when we trigger the callable subprocess from it. After callablesub is finished, it will remain a zombie task. Why i need to call ivy subprocess from api? Answer: i need to call ivy.repo() to persist my data then response the id. This api can't be called in restful.

Here is my callable subprocess:

and it's the code of api:

@Path("{applicationName}/individualch")
@Produces(MediaType.APPLICATION_JSON)
public class IndividualchApi  {

    /**
     * This API is used by third party application when it want to call
     * to create dossier Response message is cobId
     * @param provider
     * @param externalId
     * @param sobDossier
     * @return
     */
    @POST
    @Path("/dossiers")
    @Consumes(MediaType.APPLICATION_JSON)
    @Produces(MediaType.APPLICATION_JSON)
            public Response createIndividualCHDossier(@NotNull  String provider,  @NotNull String externalId, SobDossier sobDossier) {
        if (StringUtils.isBlank(provider) || StringUtils.isBlank(externalId) || sobDossier == null) {
          return Response.status(Status.BAD_REQUEST).entity(new ResponseExceptionMessage()
                .errorCode(DossierCreationServiceExceptionType.BAD_REQUEST.getUniqueCode().toString())
                .message("Invalid params")).build();
      }
        return new CreateDossierHandlerService().createIndividualCHDossier(provider, externalId, sobDossier);
    }
}

And here is the way we trigger subprocess from service:

SubProcessCallResult callResult = SubProcessCall.withPath(CREATE_DOSSIER_HANDLER_PROCESS_NAME)
                    .withStartSignature("createDossier(String,String,SobDossier)")
                    .withParam(PARAM_PROVIDER, provider).withParam(PARAM_EXTERNAL_ID, externalId)
                    .withParam(PARAM_SOB_DOSSIER, sobDossier)
                    .call();

My Question:

Is it a good solution to go? I actually can't call ivy.repo() inside my service. How can we prevent this kind of zomebie task?
If we can't prevent zombie task, how ivy handle this kind of task? Does ivy clean it up automatically?

Thanks all

Different mechanism of loading rule between Designer and Engine

trungdv — Mon, 10 Jul 2017 06:32:38 -0400

Hi all

I have a project that using api ivy.rules.engine to execute Drool rule, i just found a difference between Designer and Engine about the way it load rule package.

Here is folder rule i have:

I have two main folders: salaryReference and salaryCalculation, each of them has a child package called demo.

Here is the code that i load those rule bases:

//salaryRuleBase and basicSalaryRuleBase are IRuleBase type

in.salaryRuleBase = ivy.rules.engine.createRuleBase();
in.salaryRuleBase.loadRulesFromNamespace("salaryCalculation");

in.basicSalaryRuleBase = ivy.rules.engine.createRuleBase();
in.basicSalaryRuleBase.loadRulesFromNamespace("salaryReference");

Those two rule base only need to load main package (not childs). To be sure that it load correct package, i put two test rules on child packages, ex:

import ch.ivyteam.ivy.environment.Ivy;

rule "SalaryCal.demo"
when
then
    Ivy.log().info("=========Rule SalaryCal.demo");
end

and

import ch.ivyteam.ivy.environment.Ivy;

rule "SalaryRef.demo"
when
then
    Ivy.log().info("=========Rule SalaryRef.demo");
end

When executing this code on Designer (Axon ivy 6.3.0.52421), it work exactly as i want. only rules from salaryCalculation/basic.drl and salaryReference/default.drl are loaded and executed. I don't see any logs from test rules.

But when i deploy this project to server(same version with Designer) , i saw this line:

That a big trouble in our real project because we separate rule by packages and somehow expect rule engine will only load package that we set to them, non recursively.

Do you know why do we have this difference? it's quite confused and strange to us

Here is demo project if you want to try it out

Thanks

What is different among ways to execute as system ?

trungdv — Tue, 02 May 2017 22:55:53 -0400

Hi all

During the time i've worked with ivy, i see there is some ways to execute code with system permission:

 - ServerFactory.getServer().getSecurityManager().executeAsSystem(callable) 
 - ServerFactory.getServer().getSecurityManager().executeAsSystem2(callable) 
 - Ivy.wf().getSecurityContext().executeAsSystemUser(callable)
 - SecurityManagerFactory.getSecurityManager().executeAsSystem(callable)

It make me confused, so can anyone explain the differences?

Can ivy dataclass extends from other class

trungdv — Thu, 09 Feb 2017 02:44:57 -0500

Hi ivyteam For the moment, ivy data class always extend from CompositeObject and we have no way to change it. But there is a need to have that feature. Does ivyteam have plan to support it?

How to check environment is ivy?

trungdv — Thu, 09 Feb 2017 02:34:48 -0500

Hi all, Is there any official API to know whether we're running on Ivy environment or not? for checking 'server' or 'designer', we can use this API:

 ivy.wf.getApplication().getName().equalsIgnoreCase("designer")

but what if i want to check is it ivy env or not?

For the moment, i just have a temporary solution where i try to invoke some ivy command in try catch block then see if it throw exception of not. but i need a better solution. :)

Thanks

Prevent multiple submit when asking question

trungdv — Tue, 10 Jan 2017 10:49:22 -0500

hi ivyteam

Once i created a question in this forum and accidentally i double click on button Ask Your Question, a several duplicated questions were created. I think we should prevent this case.

Thanks

About errorId on log file

trungdv — Tue, 10 Jan 2017 10:46:00 -0500

hi all

Normally i see ivy log the error like this

Problem while processing request 'http://192.168.80.22:8090/ivy/rd/System/Administration'
    [errorId=15987B47A0255A4D, request=Ulc over HTTP POST , session=1702, application=0, requestId=132190, executionContext=SYSTEM, pmv=System$Administration$1, client=192.168.72.39]

What can we understand about this message? Can i use errorId to trace something?

P/S: Once i saw someone can change color of log in ivy designer (red, green, blue). How to do it?

Thanks

Synchronization of global variable on ivy engine

trungdv — Fri, 06 Jan 2017 02:52:39 -0500

Hi ivyteam

This is a problem (IMO) that i have faced very long time ago. When i create some global variable then deploy to server, after that i remove/rename them, then on the next deployment they're still available on engine. i have no official way to remove all redundant global variables. (have to come to DB then remove it)

Do you have plan to enhance it?

Thanks

Understanding about ivy processes category

trungdv — Wed, 04 Jan 2017 07:44:18 -0500

Hi ivyteam

For a long time ago i see those categories in ivy but never heard why ivy project create them as default (just Start Process is easy to know) Does anyone understand clearly about their purpose? in order to use it in good way. I checked on ivy documentation but can't find

Thanks

Listening when engine/designer stop ?

trungdv — Fri, 16 Dec 2016 02:12:08 -0500

Hi all

I want to know when engine/designer stop working, then i do some clean up for my business. Is there any way to listen that event?

How to use ResultTable of cms

trungdv — Thu, 01 Dec 2016 06:02:38 -0500

Hi all

I have used cms of ivy and now i want to have a table in my page, that table will populate data from other datasources (list or from DB). So i use the Result Table in ivy cms (multilingual), here is configuration of that cms: Here is define a attribute dummyData on process data (will be filled in on runtime)

I have some questions:

How to configure row/column will be render (this guideline is not good enough for me to do that)
When will i initialize data for my list dummydata on process data, because when i get this cms, i just use api: ivy.cms.co(uri) without any relationship with my process data
Can i change process data type to another one, or just can use Data as below:

Thanks in advance

Can not create task inside overriding sub process because of IllegalStateException on TaskSwitch

trungdv — Fri, 15 Jul 2016 10:58:56 -0400

Hi ivy team

In my current project, we have structure like this picture:

I can explain structure in some more words: - We have three module: Standard, Wir and Wir Test. Wir depend on Standard and Wir Test depend on Wir

In Standard we have one CallableSub Document Entry Process and it call another callablesub Handler Document Entry
In wir, we override the Handler Document Entry to create Ivy Task (use Task Switch/UserTask) then open the HtmlUserDialog of Wir project. We use the overriding function from Ivy.
Now we have the start link from Wir Test (actually no matter where we put the startlink, could be on Wir),and it call Document Entry Process from standard, then run the Overriding Process of Handler Document Entry on Wir.

But when the process hit to Task Element, it throw this exception:

    ch.ivyteam.ivy.request.RequestException: ivy:error:system
    at ch.ivyteam.ivy.request.RequestException$RequestExceptionBuilder.build(RequestException.java:161)
    at ch.ivyteam.ivy.bpm.engine.internal.BpmEngine.handleNormalRequest(BpmEngine.java:195)
    at ch.ivyteam.ivy.bpm.engine.internal.BpmEngine.handleRequestWithinContext(BpmEngine.java:140)
    at ch.ivyteam.ivy.request.impl.ContextAwareRequestHandler.handleRequest(ContextAwareRequestHandler.java:32)
    at ch.ivyteam.ivy.system.task.internal.SystemTaskJob.executeProcess(SystemTaskJob.java:127)
    at ch.ivyteam.ivy.system.task.internal.SystemTaskJob.executeAsSystem(SystemTaskJob.java:92)
    at ch.ivyteam.ivy.system.task.internal.SystemTaskJob$1.call(SystemTaskJob.java:56)
    at ch.ivyteam.ivy.security.internal.SecurityManager.executeAsSystem(SecurityManager.java:1467)
    at ch.ivyteam.ivy.system.task.internal.SystemTaskJob.execute(SystemTaskJob.java:52)
    at ch.ivyteam.ivy.job.internal.JobManager$1.call(JobManager.java:267)
    at ch.ivyteam.ivy.job.internal.JobManager$1.call(JobManager.java:1)
    at ch.ivyteam.util.callable.ExecutionContextContainer$ContainerExecutionContext.call(ExecutionContextContainer.java:92)
    at ch.ivyteam.ivy.security.internal.SecurityManager.executeInContext_aroundBody0(SecurityManager.java:1519)
    at ch.ivyteam.ivy.security.internal.SecurityManager.executeInContext_aroundBody1$advice(SecurityManager.java:41)
    at ch.ivyteam.ivy.security.internal.SecurityManager.executeInContext(SecurityManager.java:1)
    at ch.ivyteam.util.callable.ExecutionContextContainer$ContainerExecutionContext.call(ExecutionContextContainer.java:88)
    at ch.ivyteam.util.callable.ExecutionContextContainer.executeInContext(ExecutionContextContainer.java:27)
    at ch.ivyteam.ivy.job.internal.JobManager.execute(JobManager.java:261)
    at ch.ivyteam.ivy.job.internal.Job.run(Job.java:83)
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
    at java.util.concurrent.FutureTask.run(FutureTask.java:266)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at java.lang.Thread.run(Thread.java:745) Caused by: BpmError ivy:error:system
Unique ID: 155EDB7F283297EF
     Process Element: create task for Document entry <155C371802ADDD14-f62>
     Process Call Stack:
      DocumentEntryProcess <154380E2AD199B4E-f1>
      BaseDocumentProcess <1559F2D43EBE9F5C-f3>
        at ch.ivyteam.ivy.bpm.error.BpmErrorBuilder.build(BpmErrorBuilder.java:204)
        at ch.ivyteam.ivy.bpm.engine.restricted.error.BpmErrorHandler.getBpmErrorFor(BpmErrorHandler.java:90)
        at ch.ivyteam.ivy.bpm.engine.restricted.error.BpmErrorHandler.handleException(BpmErrorHandler.java:45)
        at ch.ivyteam.ivy.bpm.engine.internal.core.ProcessElementExecution.execute(ProcessElementExecution.java:42)
        at ch.ivyteam.ivy.bpm.engine.internal.core.RequestProcessor.handleExecution(RequestProcessor.java:140)
        at ch.ivyteam.ivy.bpm.engine.internal.core.RequestProcessor.processRequest(RequestProcessor.java:130)
        at ch.ivyteam.ivy.bpm.engine.internal.core.RequestProcessor.handleRequest(RequestProcessor.java:95)
        at ch.ivyteam.ivy.bpm.engine.internal.core.RequestProcessor.handleCallRequest(RequestProcessor.java:86)
        at ch.ivyteam.ivy.bpm.engine.internal.BpmEngine.handleCallRequest(BpmEngine.java:243)
        at ch.ivyteam.ivy.bpm.engine.internal.BpmEngine.handleCallRequest(BpmEngine.java:227)
        at ch.ivyteam.ivy.bpm.engine.internal.BpmEngine.handleRequestWithinContext(BpmEngine.java:132)
        at ch.ivyteam.ivy.request.impl.ContextAwareRequestHandler.handleRequest(ContextAwareRequestHandler.java:32)
        at ch.ivyteam.ivy.bpm.engine.internal.CallService.handleRequest(CallService.java:101)
        at ch.ivyteam.ivy.bpm.engine.internal.CallService.callTarget(CallService.java:93)
        at ch.ivyteam.ivy.bpm.engine.internal.CallService.call(CallService.java:59)
        at ch.ivyteam.ivy.bpm.engine.internal.core.ProcessCallExecution.execute(ProcessCallExecution.java:25)
        at ch.ivyteam.ivy.bpm.engine.internal.core.RequestProcessor.handleExecution(RequestProcessor.java:140)
        at ch.ivyteam.ivy.bpm.engine.internal.core.RequestProcessor.processRequest(RequestProcessor.java:130)
        at ch.ivyteam.ivy.bpm.engine.internal.core.RequestProcessor.handleRequest(RequestProcessor.java:95)
        at ch.ivyteam.ivy.bpm.engine.internal.core.RequestProcessor.handleCallRequest(RequestProcessor.java:86)
        at ch.ivyteam.ivy.bpm.engine.internal.BpmEngine.handleCallRequest(BpmEngine.java:243)
        at ch.ivyteam.ivy.bpm.engine.internal.BpmEngine.handleCallRequest(BpmEngine.java:227)
        at ch.ivyteam.ivy.bpm.engine.internal.BpmEngine.handleRequestWithinContext(BpmEngine.java:132)
        at ch.ivyteam.ivy.request.impl.ContextAwareRequestHandler.handleRequest(ContextAwareRequestHandler.java:32)
        at ch.ivyteam.ivy.bpm.engine.internal.CallService.handleRequest(CallService.java:101)
        at ch.ivyteam.ivy.bpm.engine.internal.CallService.callTarget(CallService.java:93)
        at ch.ivyteam.ivy.bpm.engine.internal.CallService.call(CallService.java:59)
        at ch.ivyteam.ivy.bpm.engine.internal.core.ProcessCallExecution.execute(ProcessCallExecution.java:25)
        at ch.ivyteam.ivy.bpm.engine.internal.core.RequestProcessor.handleExecution(RequestProcessor.java:140)
        at ch.ivyteam.ivy.bpm.engine.internal.core.RequestProcessor.processRequest(RequestProcessor.java:130)
        at ch.ivyteam.ivy.bpm.engine.internal.core.RequestProcessor.handleRequest(RequestProcessor.java:95)
        at ch.ivyteam.ivy.bpm.engine.internal.core.RequestProcessor.handleRequest(RequestProcessor.java:77)
        at ch.ivyteam.ivy.bpm.engine.internal.BpmEngine.handleNormalRequest(BpmEngine.java:191)
        ... 22 more
    Caused by: java.lang.IllegalStateException: TaskSwitch element (TaskSwitchElement [id=155C371802ADDD14-f62, name=create task for Document entry, type=UserTask]) is not permitted inside a sub process of a required project.
        at ch.ivyteam.ivy.bpm.engine.internal.model.bpmn.TaskSwitchElementExecutorAdapter.checkIllegalTaskSwitchUsage(TaskSwitchElementExecutorAdapter.java:111)
        at ch.ivyteam.ivy.bpm.engine.internal.model.bpmn.TaskSwitchElementExecutorAdapter.execute(TaskSwitchElementExecutorAdapter.java:81)
        at ch.ivyteam.ivy.bpm.engine.internal.model.ProcessElement.lambda$0(ProcessElement.java:215)
        at ch.ivyteam.ivy.bpm.engine.internal.model.ProcessElement.executeInElementContext(ProcessElement.java:286)
        at ch.ivyteam.ivy.bpm.engine.internal.model.ProcessElement.execute(ProcessElement.java:215)
        at ch.ivyteam.ivy.bpm.engine.internal.core.ProcessElementExecution.execute(ProcessElementExecution.java:37)
        ... 51 more

Does anyone know about this issue? Why it happen and how to solve it

Exception when using ch.ivyteam.ivy.scripting.objects.List on Primefaces

trungdv — Wed, 03 Jun 2015 06:50:29 -0400

Hi all

I'm using primefaces 5 with HtmlUserDialog, in my page i'm using <p:selectmanycheckbox> that binding with a instance of ch.ivyteam.ivy.scripting.objects.List, for example:

p:selectManyCheckbox value="#{data.selectedWeeklyDayList}" layout="pageDirection">                                                   f:selectItems value="#{data.listWeekDay}" var="weekDay" 
    itemValue="#{weekDay}"
    itemLabel="#{weekDay.value}"/>  
/p:selectManyCheckbox>

And selectedWeeklyDayList and listWeekDay are instances of ch.ivyteam.ivy.scripting.objects.List. When i submit this page, after several times, i got this exception:

IllegalAccessException: Class javax.faces.component.UIComponentBase can not access a member of class ch.ivyteam.ivy.scripting.objects.List with modifiers "private"
 RuntimeException: java.lang.IllegalAccessException: Class javax.faces.component.UIComponentBase can not access a member of class ch.ivyteam.ivy.scripting.objects.List with modifiers "private"
 IllegalStateException: Error restoring component: addNewEditForm_5649:selectedWeeklyDayList

Now i just have temporary solution to avoid this exception is i change from ch.ivyteam.ivy.scripting.objects.List to java.util.List

Why do i face this issue? and is there any solutions to avoid it but i still can use ch.ivyteam.ivy.scripting.objects.List? because i need to use some features of this class (for ex: clone() method)

Thanks all.

Overwrite process logic of ivy

trungdv — Fri, 12 Sep 2014 08:56:03 -0400

Hi all I have this situation, i have a project A and it can be used in portal B, can i overwrite some method/process of A from B? Thanks in advance

How to change default port in ivy designer/server?

trungdv — Tue, 19 Aug 2014 10:59:44 -0400

Hi all I'm using ivy designer 5 with htmlUserDialog. When i start an apllication, it can be access by browser with default port is 8081 (for ex: http://localhost:8081/ivy/info/index.jsp). Now i want to change it to another port because 8081 is being used by another application. How can i change it. Please help me for designer and server Thanks in advance

How can i register a custom taglib in ivy 5?

trungdv — Tue, 10 Jun 2014 11:07:07 -0400

Hello everybody.

Now i'm using ivy 5 with HTML dialog(jsf) and i have a trouble with registering that taglib. Because of our requirement i have to create new custom taglib (put it in jar file) then i want to register it to use. But i can't do that in Ivy (don't have web.xml for each project). So i have to copy it to <ivy folder="">\webapps\ivy\WEB-INF\lib\ everytime i make a new deployment/make some changes it that jar. My customer really now happy with that. What is alternative way to register it directly in our project?

Anyone has ever met that problem and give me any suggestions? Thanks in advance!

How can Junit access to Ivy environment without EnvironmentNotAvailableException

trungdv — Mon, 07 Apr 2014 09:34:02 -0400

Hello everybody I have two projects, one is A and one is A_Test. And i try to run JUnit Test case from project A_Test to test some functionalities of A. Here is a portion of code Project A

public CalendarEventRequest(){
    this.organizer = **Ivy.var().get("xabs_calendarEvent_organizer").toString();**
    Calendar c = new GregorianCalendar(Ivy.session().getContentLocale());
    this.timezone= c.getTimeZone();
}

Test case

@Test
public void testCreateCalendarEvent002() throws Exception {
    CalendarEventRequest request = new CalendarEventRequest();
    CalendarEventResult result = CalendarUtil.createCalendarEvent(request);
    assertNotNull(result);
}

And JUnit threw this exception:

    ch.ivyteam.ivy.environment.EnvironmentNotAvailableException: Access to ivy environment outside a process request thread is not possible.
Current thread: Thread[main,5,main]
    at ch.ivyteam.ivy.environment.Ivy.getEnvironmentData(Ivy.java:455)
    at ch.ivyteam.ivy.environment.Ivy.var(Ivy.java:272)
    at ch.soreco.customers.xabs.bean.CalendarEventRequest.<init>(CalendarEventRequest.java:26)
    at ch.soreco.customers.xabs.bean.CalendarUtilTest.createRequestForOneDay(CalendarUtilTest.java:75)
    at ch.soreco.customers.xabs.bean.CalendarUtilTest.testCreateCalendarEvent002(CalendarUtilTest.java:52)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:45)
    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
    at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:42)
    at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)
    at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:263)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:68)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:47)
    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:231)
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:60)
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:229)
    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:50)
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:222)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:300)
    at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)
    at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)

anyone can help me?