LDAP-341: Incompatibility between Spring LDAP 2.0.4.RELEASE and Spring Data Rest 2.4.0.RELEASE (Gosling) about spring-ldap-migrate-issues

[rwinch]

Rob Winch said:

olivergierke There appears to be an issue with Spring LDAP's repository support and the integration with Spring Data REST. I followed the migration guide but it appears there is something missing? Any chance you can try out the sample project at https://github.com/voidengineer/spring-data-gosling-ldap and provide clues as to what is wrong?

[rwinch]

Sören Chittka said:

I do not want to be impatient, but are there any news on this?

This bug currently keeps us from using Spring Data Gosling.

[rwinch]

Rob Winch said:

Thanks for the bump. I've pinged the Spring Data Team directly and they are taking a look.

[rwinch]

Rob Winch said:

I'm wondering if you can clarify something for me.

Are you attempting to access Spring LDAP through Spring Data REST?

or

Are you attempting to access some other backend (i.e. JPA) through Spring Data REST and happen to also use Spring LDAP (but do not expose Spring LDAP via REST)?

The reason I am asking is that when I attempt to actually use Spring Data REST backed by Spring LDAP (even in the fowler release) I get the following error:

java.lang.reflect.InvocationTargetException
    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:606)
    at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:221)
    at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:137)
    at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:110)
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandleMethod(RequestMappingHandlerAdapter.java:776)
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:705)
    at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85)
    at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:959)
    at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:893)
    at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:967)
    at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:858)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:622)
    at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:843)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:291)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:77)
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:85)
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:219)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106)
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:142)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:518)
    at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1091)
    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:673)
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1526)
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1482)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
    at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.IllegalArgumentException: PersistentEntity must not be null!
    at org.springframework.util.Assert.notNull(Assert.java:112)
    at org.springframework.data.rest.webmvc.PersistentEntityResource$Builder.<init>(PersistentEntityResource.java:155)
    at org.springframework.data.rest.webmvc.PersistentEntityResource$Builder.<init>(PersistentEntityResource.java:137)
    at org.springframework.data.rest.webmvc.PersistentEntityResource.build(PersistentEntityResource.java:129)
    at org.springframework.data.rest.webmvc.PersistentEntityResourceAssembler.wrap(PersistentEntityResourceAssembler.java:105)
    at org.springframework.data.rest.webmvc.PersistentEntityResourceAssembler.toResource(PersistentEntityResourceAssembler.java:84)
    at org.springframework.data.rest.webmvc.AbstractRepositoryRestController.entitiesToResources(AbstractRepositoryRestController.java:121)
    at org.springframework.data.rest.webmvc.AbstractRepositoryRestController.toResources(AbstractRepositoryRestController.java:83)
    at org.springframework.data.rest.webmvc.RepositoryEntityController.getCollectionResource(RepositoryEntityController.java:202)
    ... 45 more

The error is actually somewhat hidden and is viewed as a 500 with the following DEBUG log:

2015-10-26 11:37:28.769 DEBUG 76895 --- [nio-8080-exec-3] .m.m.a.ExceptionHandlerExceptionResolver : Resolving exception from handler [public org.springframework.hateoas.Resources<?> org.springframework.data.rest.webmvc.RepositoryEntityController.getCollectionResource(org.springframework.data.rest.webmvc.RootResourceInformation,org.springframework.data.rest.webmvc.support.DefaultedPageable,org.springframework.data.domain.Sort,org.springframework.data.rest.webmvc.PersistentEntityResourceAssembler) throws org.springframework.data.rest.webmvc.ResourceNotFoundException,org.springframework.web.HttpRequestMethodNotSupportedException]: java.lang.IllegalArgumentException: PersistentEntity must not be null!
2015-10-26 11:37:28.770 DEBUG 76895 --- [nio-8080-exec-3] o.s.b.f.s.DefaultListableBeanFactory     : Returning cached instance of singleton bean 'repositoryRestExceptionHandler'
2015-10-26 11:37:28.771 DEBUG 76895 --- [nio-8080-exec-3] .m.m.a.ExceptionHandlerExceptionResolver : Invoking @ExceptionHandler method: org.springframework.http.ResponseEntity<org.springframework.data.rest.webmvc.support.ExceptionMessage> org.springframework.data.rest.webmvc.RepositoryRestExceptionHandler.handleMiscFailures(java.lang.Exception)

If I use Spring MVC instead of Spring Data REST it works (since Spring MVC does not try to apply the hypermedia). See my fork for a complete example https://github.com/rwinch/spring-data-gosling-ldap/tree/embedded-ldap

[rwinch]

Rob Winch said:

Possibly related to DATAREST-473 (i.e. we can disable Spring LDAP repository from being exported to prevent he error).

[rwinch]

Sören Chittka said:

In fact in the real application I am exposing JPA repositories via Spring Data Rest.
Spring LDAP is only used in a background job for access to our ActiveDirectory. It is not exported over HTTP in any way.

I already tried to annotate the LDAP repository with @RepositoryRestResource(exported = false), but that did not help.

But I imagine there might be usecases where I want to export Spring LDAP repositories with Spring Data Rest. So it would be nice, if that worked.

[rwinch]

Rob Winch said:

It seems to me like there are two things going on here:

• It appears at the moment you need the ability to disable Spring LDAP repositories from being exported as a REST repository. This is a duplicate of DATAREST-473. For this reason, I will be closing this issue as a duplicate of it.
• In the future, you might want an enhancement to Spring LDAP to support being exported as a REST endpoint. I have created LDAP-342

[rwinch]

Rob Winch said:

I should add that by making the LDAP repository package scope it should prevent it from being exported. This might be a viable workaround for you.