Comments on Java Code Geeks: GWT 2 Spring 3 JPA 2 Hibernate 3.5 Tutorial

why I cant have java.util.Date field in Pojo class...

2012-01-05T17:42:36.814+02:00

why I cant have java.util.Date field in Pojo class because throws me serialization exception

Ok, i have just found the solution. When we go to...

2012-01-03T21:38:11.999+02:00

Ok, i have just found the solution.

When we go to AOP Alliance web on Sourceforge, they have 2 versions of its JAR file.

- aopalliance.jar
- aopalliance-alpha1.jar

I had the 'alpha1' file, because i thought that it was the only one version.

With that file, your example doesn't work. With the 'aopalliance.jar' file, the example works.

So, this can be a problem if I would want to make a web using all that you have written, because they have changed something important into their jar and the new versions won't work.

Hi, a great tutorial. But i'm having a proble...

2012-01-03T21:06:27.268+02:00

Hi, a great tutorial.

But i'm having a problem when i try to deploy the application on Tomcat.

I have always the same error message:

GRAVE: Excepción enviando evento inicializado de contexto a instancia de escuchador de clase org.springframework.web.context.ContextLoaderListener
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.context.annotation.internalAsyncAnnotationProcessor': Invocation of init method failed; nested exception is java.lang.NoClassDefFoundError: org/aopalliance/aop/Advice
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1455)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:519)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:456)
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:294)
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:225)
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:291)

I have reviewed the version of the JARs and all of them are the corrects.

I have tried with the 'war' directory from you own eclipse project, but i have the same error message.

So... any idea about why is failing?

Thanks.

Hi, thank you for this amazing tutorial. I am exp...

2012-01-03T16:03:33.500+02:00

Hi, thank you for this amazing tutorial.

I am experiencing an odd problem. Everything seems to be OK but after tomcat starts up, and I open the browser, there are only texts, buttons are missing. I did no modification on the code, only difference is I am using Oracle 11g DB.

Any help

Hi, Ran through your example and it ran like a ch...

2011-12-26T09:50:26.923+02:00

Hi,

Ran through your example and it ran like a charm, but I'm curious about how you can debug a Spring/GWT app. I'd like to be able to run it in GWT's development mode, but when I try to do so, I get the following error:

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'employeeDAO': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: javax.persistence.EntityManagerFactory com.javacodegeeks.gwtspring.server.dao.EmployeeDAO.entityManagerFactory; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in ServletContext resource [/WEB-INF/applicationContext.xml]: Invocation of init method failed; nested exception is javax.persistence.PersistenceException: [PersistenceUnit: MyPersistenceUnit] Unable to configure EntityManagerFactory

I'm sure I'm missing something simple. Thanks.

Hi, I had the same problem. You have to download h...

2011-12-19T05:28:13.638+02:00

Hi, I had the same problem. You have to download hibernate-validator-4.0.0.GA.jar (or another version, this one worked for me), and add it to WEB-INF/lib.

Hello, i follow your example but i dont use HDBSQ...

2011-11-13T00:37:23.404+02:00

Hello,

i follow your example but i dont use HDBSQL instead of i use MySQL5.5 i got 3 layers, the Controllers, Service and DAO, each ones has annotated right, i mean, the Controller has the @Controller, the service @Service and the DAO has @Repository. In service layer i got @Transactional and never persist

ok... thank you so much Idc... but now I've an...

2011-10-28T16:02:35.772+03:00

ok... thank you so much Idc... but now I've another problem... My project sayd this...

xception while dispatching incoming RPC call
org.springframework.beans.factory.BeanNotOfRequiredTypeException: Bean named 'org.springframework.transaction.interceptor.TransactionInterceptor#0' must be of type [org.aopalliance.aop.Advice], but was actually of type [org.springframework.transaction.interceptor.TransactionInterceptor]
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:348)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:193)
at org.springframework.aop.support.AbstractBeanFactoryPointcutAdvisor.getAdvice(AbstractBeanFactoryPointcutAdvisor.java:80)
at org.springframework.aop.framework.adapter.DefaultAdvisorAdapterRegistry.getInterceptors(DefaultAdvisorAdapterRegistry.java:78)
at org.springframework.aop.framework.DefaultAdvisorChainFactory.getInterceptorsAndDynamicInterceptionAdvice(DefaultAdvisorChainFactory.java:61)
at org.springframework.aop.framework.AdvisedSupport.getInterceptorsAndDynamicInterceptionAdvice(AdvisedSupport.java:482)
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:188)
at $Proxy32.toString(Unknown Source)
at java.lang.String.valueOf(String.java:2826)
at java.lang.StringBuilder.append(StringBuilder.java:115)
at org.spring4gwt.server.SpringGwtRemoteServiceServlet.getBean(SpringGwtRemoteServiceServlet.java:60)
at org.spring4gwt.server.SpringGwtRemoteServiceServlet.processCall(SpringGwtRemoteServiceServlet.java:31)
at com.google.gwt.user.server.rpc.RemoteServiceServlet.processPost(RemoteServiceServlet.java:248)
at com.google.gwt.user.server.rpc.AbstractRemoteServiceServlet.doPost(AbstractRemoteServiceServlet.java:62)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:487)
at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:362)
at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181)
at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:729)
at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:405)
at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
at org.mortbay.jetty.handler.RequestLogHandler.handle(RequestLogHandler.java:49)
at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
at org.mortbay.jetty.Server.handle(Server.java:324)
at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:505)
at org.mortbay.jetty.HttpConnection$RequestHandler.content(HttpConnection.java:843)
at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:647)
at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:211)
at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:380)
at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:395)
at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:488)

some news?

Ok suddenly In my previous post the generic stuff ...

2011-10-28T12:13:06.838+03:00

Ok suddenly In my previous post the generic stuff between the "larger" and "smaller" brackets gets deleted :(

So I did the following:

public abstract class JpaDAO{K, E} extends JpaDaoSupport {

to

public abstract class JpaDAO{E, K} extends JpaDaoSupport {

and changed:

public class EmployeeDAO extends JpaDAO{EmployeeDTO, Long} {

Hope it's clear now, and apologies for the wrong brackets :)

First of all, thanks for this great tutorial! Help...

2011-10-28T11:48:05.416+03:00

First of all, thanks for this great tutorial! Helped me a lot!

I got it all working and tried to make some adaptations to see if I understood everything well, when I encountered some strange behavior I don't understand at all.

In the JpaDao class I thought it would be more logical to change the class constructor from:

public abstract class JpaDAO extends JpaDaoSupport {

to

public abstract class JpaDAO extends JpaDaoSupport {

and in EmployeeDao I did the same change in order:

public class EmployeeDAO extends JpaDAO {

Suddenly I get errors like the following:

com.google.gwt.user.server.rpc.UnexpectedException: Service method 'public abstract com.javacodegeeks.gwtspring.shared.dto.EmployeeDTO com.javacodegeeks.gwtspring.shared.services.EmployeeService.findEmployee(long)' threw an unexpected exception: org.springframework.dao.InvalidDataAccessApiUsageException: Unknown entity: java.lang.Long; nested exception is java.lang.IllegalArgumentException: Unknown entity: java.lang.Long
at com.google.gwt.user.server.rpc.RPC.encodeResponseForFailure(RPC.java:385)
...

Does anyone have any idea why I can't change the order of the declaration of the generic classes?

Thanks in advance!

Please, someone help me... I created a new Dao, an...

2011-10-27T17:17:49.797+03:00

Please, someone help me... I created a new Dao, and I've the following error

Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: javax.persistence.EntityManagerFactory youjob.server.dao.OffertaLavoroDAO.entityManagerFactory; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in ServletContext resource [/WEB-INF/applicationContext.xml]: Invocation of init method failed; nested exception is javax.persistence.PersistenceException: [PersistenceUnit: MyPersistenceUnit] Unable to configure EntityManagerFactory

I create the new Dao with the same procedure of the tutorial... Why it do that error? Please, someone help me...

org.springframework.beans.factory.BeanCreationExce...

2011-10-19T06:28:38.838+03:00

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'employeeDAO': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: javax.persistence.EntityManagerFactory com.javacodegeeks.gwtspring.server.dao.EmployeeDAO.entityManagerFactory; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in ServletContext resource [/WEB-INF/applicationContext.xml]: Invocation of init method failed; nested exception is java.lang.NoClassDefFoundError: org/datanucleus/jpa/exceptions/NoPersistenceXmlException

Please Help

I have only hibernate jpa in my lib and i have removed all other jpas'. how to resolve this.

It appears that in my above post the > and <...

2011-07-28T14:41:23.507+03:00

It appears that in my above post the > and < tags were omitted.

So, I finished my own example. I've done it a...

2011-07-27T15:57:49.512+03:00

So, I finished my own example.

I've done it a little bit different, no @Service/@Autowired annotations (I'm a fan of putting it into the application context xml).

Also, I configured my Hibernate database stuff in another application-xml aswell (no persistence-xml) although I still use JPA for Entity-annotation.
This also means my DAO extends HibernateDaoSupport instead of JpaDaoSupport.

This all just custom taste (de gustibus et coloribus non disputandum est).

However, I struggled for a while (too long!) with one issue:

[WARN] 405 - GET /employee/gwt/clean/clean.css (127.0.0.1) 1486 bytes
Request headers
Host: 127.0.0.1:8888
User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:5.0) Gecko/20100101 Firefox/5.0
Accept: text/css,*/*;q=0.1
Accept-Language: en,nl-be;q=0.7,fr-be;q=0.3
Accept-Encoding: gzip, deflate
Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7
Connection: keep-alive
Referer: http://127.0.0.1:8888/Employee.html?gwt.codesvr=127.0.0.1:9997
Response headers
Content-Type: text/html; charset=iso-8859-1
Content-Length: 1486

Weird error, I'd say so... The application worked, but there was no CSS attached because of the error.

Cause:
GWT auto generates a css file to this location: war//gwt/clean/clean.css
For me that became: war/employee/gwt/clean/clean.css

Coincidentally, I mapped the Spring4GWT servlet as follows:

spring4gwt
org.spring4gwt.server.SpringGwtRemoteServiceServlet

spring4gwt
/employee/gwt/*

So the spring4gwt servlet picked up the GET-request to the CSS and decided it could not be processed.

Solution:
Map the spring4gwt servlet to anything else:

spring4gwt
/employee/web/*

Also, initially I struggled alot with getting my application to start up. There was a commons-logging.jar/log4j.jar problem.

When I started up with Log4j in the WEB-INF/lib, it crashed saying it couldn't find some Log4j classes (although present).

When I removed it from the classpath, the application booted, but the second some class tried to log, it crashed saying it couldn't find some other Log4j classes.

Turned out my Eclipse had a duplicate log4j jar somewhere in its classpath, so when I removed it from WEB-INF/lib, it could launch the Jetty-server, but no class could log because the ClassLoader of the webapp didnt have the Log4J jar.
And when I put the jar in the WEB-INF/lib it couldn't start due to duplicate jars.

Solution: go Sherlock Holmes-style on your Eclipse installation and remove the Log4J jar it had referenced.

Anyway, thanks again for the article, it was a really big help!

Bart

Great article. This has really helped me alot on ...

2011-07-27T12:35:49.952+03:00

Great article. This has really helped me alot on integrating GWT/Spring/Hibernate.

I'm now going to work out a custom example and will get back to this page if errors/remarks pop up.

Bart

Hello, than you all for your comments. @MERCI: yo...

2011-07-20T20:53:55.782+03:00

Hello, than you all for your comments.

@MERCI: you can find numerous examples for configuring the "persistence.xml" to use MySQL. Just "google" for the result!

@WenZ: Thanx!If you already have a back-end running Spring you could use our approach and implement *proxy* Spring services at the front-end that use Spring remoting to communicate with the back-end Spring services (provided that the back-end Spring services are exposed over Spring remoting channels)

BRs

Hi all! Great tutorial and bravo for the good wor...

2011-07-20T18:37:08.708+03:00

Hi all!

Great tutorial and bravo for the good work Justin! really helps us to get started.

I have a question though..

What if I have already a Maven+Hibernate+Spring back-end running perfectly; and that I would like to add a GWT front-end? Since the whole project structure is different, is it even worth the consideration?
I've looked into a lot of forums, discussion and tutorials but couldn't seem to find my answer.

Thanks for any help :D

I want to use Mysql database,can you help me to co...

2011-06-15T02:54:39.379+03:00

I want to use Mysql database,can you help me to configure the persitence.xml file
i need your help.

hello,i have a error when i run my application GWT...

2011-06-14T17:04:11.945+03:00

hello,i have a error when i run my application GWTSpring in jetty.
Error creating bean with name 'employeeDAO': Injection of autowired dependencies failed
please help me .

thanks for the post, I am getting the following ex...

2011-05-05T12:28:13.947+03:00

thanks for the post, I am getting the following exception when I deploy in the Tomcat I included
hibernate3.jar and hibernate-jpa-2.0-api-1.0.0.Final.jar but still getting

java.lang.NoSuchFieldError: SINGULAR_ATTRIBUTE
at org.hibernate.ejb.metamodel.SingularAttributeImpl.getBindableType(SingularAttributeImpl.java:136) please give me some solutions about this.

Unfortunately Justin, I am going to have to agree ...

2011-04-16T16:27:35.909+03:00

Unfortunately Justin, I am going to have to agree with Dan on this one. I too have written about GWT and Spring; however I find it violates the Separation of Concerns Principle by simple invasion OR the implied Spring Framework Interrupt of the GWT RPC Inner Framework. I am not quite convinced Spring is a good match for GWT for it degrades the RPC Channel Performance. Seeing that Spring is now working With GWT to produce a Spring Roo Layer...I will wait to see what unfolds. Here is the link to my discussion and concerns;

http://maurice-johnson.blogspot.com/2011/03/gwt-hibernate-and-spring-framework.html

Thank you for this very helpful post! :D

2011-04-16T15:42:02.718+03:00

Thank you for this very helpful post!

:D

Hi Byron, I tried with - "FROM EmployeeDTO&qu...

2011-04-15T17:19:01.694+03:00

Hi Byron,
I tried with
- "FROM EmployeeDTO"
- "SELECT h FROM EmployeeDTO h"
- "SELECT r FROM EmployeeDTO r WHERE r.employeeName like ?1", "name"
- "SELECT h FROM " + entityClass.getName() + " h"

but I always got the error "Caused by: java.lang.NoSuchFieldError: NONE"

I think it's not a problem of HQL syntax.

Thank you for everything

Hi Justin Thank you for the article. I've spe...

2011-04-15T11:46:11.901+03:00

Hi Justin

Thank you for the article. I've spent some time to follow the tutorial and to build this application in my eclipse.

Unfortunately the gwt4spring servlet does not find my employeeService :-(

Here is the exception:

15.04.2011 10:27:02 org.apache.catalina.core.ApplicationContext log
SCHWERWIEGEND: Exception while dispatching incoming RPC call
java.lang.IllegalArgumentException: Spring bean not found: employeeService
at org.spring4gwt.server.SpringGwtRemoteServiceServlet.getBean(SpringGwtRemoteServiceServlet.java:96)
at org.spring4gwt.server.SpringGwtRemoteServiceServlet.getBean(SpringGwtRemoteServiceServlet.java:55)
at org.spring4gwt.server.SpringGwtRemoteServiceServlet.processCall(SpringGwtRemoteServiceServlet.java:31)
at com.google.gwt.user.server.rpc.RemoteServiceServlet.processPost(RemoteServiceServlet.java:243)
at com.google.gwt.user.server.rpc.AbstractRemoteServiceServlet.doPost(AbstractRemoteServiceServlet.java:62)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298)
at org.apache.coyote.http11.Http11AprProcessor.process(Http11AprProcessor.java:859)
at org.apache.coyote.http11.Http11AprProtocol$Http11ConnectionHandler.process(Http11AprProtocol.java:579)
at org.apache.tomcat.util.net.AprEndpoint$Worker.run(AprEndpoint.java:1555)
at java.lang.Thread.run(Thread.java:619)

Any idea about this error?

Thank you for your help
Regards
Artur

Hello @j.singh.developer, I think that there is ...

2011-04-15T10:39:48.321+03:00

Hello

@j.singh.developer, I think that there is no way to do what you describe when you pass all information to the client. One way to overcome the issue is to create a "secured" DTO that will contain less information for certain clients.

@franki, Please check your HQL syntax!

BRs