Unable to setup Kundera for MongoDB

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Ratesh Bansal

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May 2, 2014, 2:56:14 AM5/2/14
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Hi,

I am trying to set up a simple service to use Kundera with MongoDB. I keep getting NullPointerException for the AppMetaModel.

Attached is a sample code. It looks like Kundera is unable to read my persistence.xml. But I not sure what am I missing in the configuration.

Can you have a look?

Regards,
babybook.rar

Vivek Mishra

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May 2, 2014, 2:59:10 AM5/2/14
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Possible to share error trace?

 

-Vivek

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Ratesh Bansal

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May 2, 2014, 3:00:02 AM5/2/14
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Stacktraces

java.lang.NullPointerException
    com.impetus.kundera.configure.SchemaConfiguration.getEntityMetadataCol(SchemaConfiguration.java:438)
    com.impetus.kundera.configure.SchemaConfiguration.configure(SchemaConfiguration.java:107)
    com.impetus.kundera.configure.ClientMetadataBuilder.buildClientFactoryMetadata(ClientMetadataBuilder.java:45)
    com.impetus.kundera.persistence.EntityManagerFactoryImpl.configureClientFactories(EntityManagerFactoryImpl.java:352)
    com.impetus.kundera.persistence.EntityManagerFactoryImpl.(EntityManagerFactoryImpl.java:116)
    com.babybook.signup.service.SignUpService.signup(SignUpService.java:23)
    com.babybook.signup.action.SignUpAction.add(SignUpAction.java:46)
    sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    java.lang.reflect.Method.invoke(Method.java:606)
    com.opensymphony.xwork2.DefaultActionInvocation.invokeAction(DefaultActionInvocation.java:450)
    com.opensymphony.xwork2.DefaultActionInvocation.invokeActionOnly(DefaultActionInvocation.java:289)
    com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:252)
    org.apache.struts2.interceptor.debugging.DebuggingInterceptor.intercept(DebuggingInterceptor.java:256)
    com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
    com.opensymphony.xwork2.interceptor.DefaultWorkflowInterceptor.doIntercept(DefaultWorkflowInterceptor.java:176)
    com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)
    com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
    com.opensymphony.xwork2.validator.ValidationInterceptor.doIntercept(ValidationInterceptor.java:265)
    org.apache.struts2.interceptor.validation.AnnotationValidationInterceptor.doIntercept(AnnotationValidationInterceptor.java:68)
    com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)
    com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
    com.opensymphony.xwork2.interceptor.ConversionErrorInterceptor.intercept(ConversionErrorInterceptor.java:138)
    com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
    com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:249)
    com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)
    com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
    com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:249)
    com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)
    com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
    com.opensymphony.xwork2.interceptor.StaticParametersInterceptor.intercept(StaticParametersInterceptor.java:191)
    com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
    org.apache.struts2.interceptor.MultiselectInterceptor.intercept(MultiselectInterceptor.java:73)
    com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
    org.apache.struts2.interceptor.CheckboxInterceptor.intercept(CheckboxInterceptor.java:91)
    com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
    org.apache.struts2.interceptor.FileUploadInterceptor.intercept(FileUploadInterceptor.java:252)
    com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
    com.opensymphony.xwork2.interceptor.ModelDrivenInterceptor.intercept(ModelDrivenInterceptor.java:100)
    com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
    com.opensymphony.xwork2.interceptor.ScopedModelDrivenInterceptor.intercept(ScopedModelDrivenInterceptor.java:141)
    com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
    com.opensymphony.xwork2.interceptor.ChainingInterceptor.intercept(ChainingInterceptor.java:145)
    com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
    com.opensymphony.xwork2.interceptor.PrepareInterceptor.doIntercept(PrepareInterceptor.java:171)
    com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)
    com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
    com.opensymphony.xwork2.interceptor.I18nInterceptor.intercept(I18nInterceptor.java:176)
    com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
    org.apache.struts2.interceptor.ServletConfigInterceptor.intercept(ServletConfigInterceptor.java:164)
    com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
    com.opensymphony.xwork2.interceptor.AliasInterceptor.intercept(AliasInterceptor.java:193)
    com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
    com.opensymphony.xwork2.interceptor.ExceptionMappingInterceptor.intercept(ExceptionMappingInterceptor.java:187)
    com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
    org.apache.struts2.impl.StrutsActionProxy.execute(StrutsActionProxy.java:54)
    org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:546)
    org.apache.struts2.dispatcher.ng.ExecuteOperations.executeAction(ExecuteOperations.java:77)
    org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.doFilter(StrutsPrepareAndExecuteFilter.java:91)
    org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1212)
    org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:399)
    org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
    org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182)

Vivek Mishra

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May 2, 2014, 3:09:10 AM5/2/14
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Placing META-INF/persistence.xml under domain/src/main/resources should work for you.

Also, List<Child> won’t work within Parent entity, unless  Child entity is an associated entity or embeddable entity.

 

https://github.com/impetus-opensource/Kundera/issues/543

 

https://github.com/impetus-opensource/Kundera/issues/237

Ratesh Bansal

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May 2, 2014, 3:13:33 AM5/2/14
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No it does not work.....

Struts Problem Report

Struts has detected an unhandled exception:

Messages:
File:com/impetus/kundera/configure/SchemaConfiguration.java
Line number:438

Stacktraces

java.lang.NullPointerException
    com.impetus.kundera.configure.SchemaConfiguration.getEntityMetadataCol(SchemaConfiguration.java:438)
    com.impetus.kundera.configure.SchemaConfiguration.configure(SchemaConfiguration.java:107)
    com.impetus.kundera.configure.ClientMetadataBuilder.buildClientFactoryMetadata(ClientMetadataBuilder.java:45)
    com.impetus.kundera.persistence.EntityManagerFactoryImpl.configureClientFactories(EntityManagerFactoryImpl.java:352)
    com.impetus.kundera.persistence.EntityManagerFactoryImpl.(EntityManagerFactoryImpl.java:116)
    com.babybook.signup.service.SignUpService.signup(SignUpService.java:23)
    com.babybook.signup.action.SignUpAction.add(SignUpAction.java:46)
    sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    java.lang.reflect.Method.invoke(Method.java:606)
    com.opensymphony.xwork2.DefaultActionInvocation.invokeAction(DefaultActionInvocation.java:45

I have tried keeping it in the service-manager as well. 

It seems Kundera is simply not able to find the persistence.xml


Ratesh Bansal

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May 2, 2014, 3:17:29 AM5/2/14
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oh I didnt see your comments on the Child Entity, It will be an associated Entity.


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Vivek Mishra

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May 2, 2014, 3:19:12 AM5/2/14
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2.6 is pretty old version of Kundera. Latest is 2.11.1.

Deploying at my end with latest version.

 

-Vivek

 

From: kundera...@googlegroups.com [mailto:kundera...@googlegroups.com] On Behalf Of Ratesh Bansal


Sent: Friday, May 02, 2014 12:44 PM
To: kundera...@googlegroups.com

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Ratesh Bansal

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May 2, 2014, 3:48:37 AM5/2/14
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I am able to resolve that error, Now I am getting following exception:

com.impetus.kundera.KunderaException: Entitymatadata should not be null
    com.impetus.kundera.persistence.PersistenceDelegator.getMetadata(PersistenceDelegator.java:720)
    com.impetus.kundera.persistence.PersistenceDelegator.persist(PersistenceDelegator.java:139)
    com.impetus.kundera.persistence.EntityManagerImpl.persist(EntityManagerImpl.java:168)


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Vivek Mishra

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May 2, 2014, 4:03:04 AM5/2/14
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Was looking in shared persistence.xml

You need to enable

 

<!-- <properties> <property name="kundera.nodes" value="localhost" /> <property name="kundera.port" value="27017" /> <property name="kundera.keyspace" value="babybook" /> <property name="kundera.dialect" value="mongodb" /> <property name="kundera.client" value="com.impetus.client.MongoDBClient" /> <property name="kundera.client.lookup.class" value="com.impetus.client.mongodb.MongoDBClientFactory" /> </properties> -->

 

EntityMetadata null error, possible reasons:

1.       Incorrect entity mapping

2.       Invalid pu provided while creating entity manager factory

 

You may also refer https://github.com/impetus-opensource/Kundera/issues/76

 

Please share CRUD and entity definitions and persistence.xml if it doesn’t work for you.

 

-Vivek

From: kundera...@googlegroups.com [mailto:kundera...@googlegroups.com] On Behalf Of Ratesh Bansal


Sent: Friday, May 02, 2014 1:19 PM
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Ratesh Bansal

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May 2, 2014, 5:20:01 AM5/2/14
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I have tried all your suggestions:

1. Uncomment the properties in persistence.xml
2. Entity mapping is correct
3. Pu is specified correctly

Attached is the new zip file.

Regards
babybook.rar

Chhavi Gangwal

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May 2, 2014, 6:55:15 AM5/2/14
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Hi,

Had a look at your project , following are the findings :

1. Your entity is missing @Id field. Few basic rules required to run can be found at:https://github.com/impetus-opensource/Kundera/wiki/Concepts
2. with 2.6 you need to annotate with schema@pu3. i suggest to use latest kundera version(as suggested by Vivek Mishra)

For further details check out the example usage at :

https://github.com/impetus-opensource/Kundera/tree/trunk/src/kundera-mongo/src/test/java/com/impetus


Please find the changes required to get it working :

@Entity
@Table(name="PARENT", schema="babybook@babybook")
public class Parent {
   
    @Id
    @GeneratedValue
    private String id;
..........................................................

@Entity
@Table(name="CHILD" , schema="babybook@babybook")
public class Child {
   
    @Id
    @GeneratedValue
    private String id;

.................................................................

//EntityManagerFactory factory = new KunderaPersistence().createEntityManagerFactory("babybook", map);
  EntityManagerFactory factory = Persistence.createEntityManagerFactory("babybook", map);

...............................................................................

    <properties>
            <property name="kundera.nodes" value="localhost" />
            <property name="kundera.port" value="27017" />
            <property name="kundera.keyspace" value="babybook" />
            <property name="kundera.dialect" value="mongodb" />
<!--             <property name="kundera.client" value="com.impetus.client.MongoDBClient" /> -->

            <property name="kundera.client.lookup.class" value="com.impetus.client.mongodb.MongoDBClientFactory" />
       </properties>


Chhavi

Vivek Mishra

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May 2, 2014, 6:59:27 AM5/2/14
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Just to add on point 2.  As suggested earlier to use latest Kundera version, no need to define

@Table(name="PARENT", schema="babybook@babybook")

 

Is optional. Which was mandatory prior to 2.9 releases.

 

HTH,

-Vivek

 

From: kundera...@googlegroups.com [mailto:kundera...@googlegroups.com] On Behalf Of Chhavi Gangwal
Sent: Friday, May 02, 2014 4:25 PM
To: kundera...@googlegroups.com
Subject: {kundera-discuss} Re: Unable to setup Kundera for MongoDB

 

Hi,

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Ratesh Bansal

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May 2, 2014, 7:56:58 AM5/2/14
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A big thanks


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Ratesh Bansal

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May 5, 2014, 2:57:26 AM5/5/14
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Can somebody explain this error:

Exception in thread "main" com.impetus.kundera.KunderaException: java.lang.IllegalArgumentException: Entity object is invalid, operation failed. Please check previous log message for details
at com.impetus.kundera.persistence.EntityManagerImpl.persist(EntityManagerImpl.java:174)
at com.babybook.signup.service.EventService.persist(EventService.java:9)
at com.babybook.signup.service.EventService.main(EventService.java:21)
Caused by: java.lang.IllegalArgumentException: Entity object is invalid, operation failed. Please check previous log message for details
at com.impetus.kundera.graph.ObjectGraphBuilder.getNode(ObjectGraphBuilder.java:101)
at com.impetus.kundera.graph.ObjectGraphBuilder.getObjectGraph(ObjectGraphBuilder.java:75)
at com.impetus.kundera.persistence.PersistenceDelegator.persist(PersistenceDelegator.java:135)
at com.impetus.kundera.persistence.EntityManagerImpl.persist(EntityManagerImpl.java:168)
... 2 more

Attached is the entity graph.


Comment.java
Event.java
Like.java

Vivek Mishra

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May 5, 2014, 3:35:25 AM5/5/14
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Version of Kundera?

 

-Vivek

 

From: kundera...@googlegroups.com [mailto:kundera...@googlegroups.com] On Behalf Of Ratesh Bansal


Sent: Monday, May 05, 2014 12:27 PM
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Ratesh Bansal

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May 5, 2014, 3:45:20 AM5/5/14
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I got passed this, I think the error message could be improved. i was missing the entry in persistence.xml
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