kotlinlang #spring

Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'neo4jMappingContext' defined in class path resource [vampr/PersistenceAssembly.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.data.neo4j.mapping.Neo4jMappingContext]: Factory method 'neo4jMappingContext' threw exception; nested exception is java.lang.NullPointerException
	at  etc etc 
Caused by: java.lang.NullPointerException
	at com.sun.beans.TypeResolver.resolve(TypeResolver.java:203)

jasper

03/18/2016, 12:09 AM

Method threw 'java.lang.NullPointerException' exception. Cannot evaluate sun.reflect.generics.reflectiveObjects.ParameterizedTypeImpl.toString()

sdeleuze

03/18/2016, 8:01 AM

@jasper: Mine (https://github.com/sdeleuze/geospatial-messenger) works fine with 1.0.1, so I guess it would be nice if you would be able to reproduce with a simple project created via http://start.spring.io/#!language=kotlin in order to create a bug to fix for 1.0.2 if needed

jasper

03/18/2016, 12:29 PM

@sdeleuze: Yes, the error is related to neo4j. I can surely strip it down to to a failing sample, however I started the project before the availability of kotlin starter, so it would just be a gradle build.

jasper

03/21/2016, 2:26 AM

My Kotlin 1.0.1 issue: workaround: When I declare my Neo4j assembly/beans in plain Java it works.

jasper

03/21/2016, 2:27 AM

@sdeleuze I’ll prepare a failing example today and submit to Jetbrains and yourself/Spring team.

jasper

03/21/2016, 6:00 AM

It turns out that when I stripped the issue down, I couldn’t reproduce it. However, I’ve logged it, and offered to privately share source with Jetbrains: https://youtrack.jetbrains.com/issues/IDEA

paul_klym

03/21/2016, 12:42 PM

error.png

paul_klym

03/21/2016, 12:42 PM

mock.png

sdeleuze

03/21/2016, 12:54 PM

@paul_klym: try with

hasSize<String>(3)

sdeleuze

03/21/2016, 12:54 PM

I have seen this issue also when converting Java code to Kotlin

sdeleuze

03/21/2016, 12:55 PM

I am wondering if this is a bug or a well known limit of Kotlin Java interop ….

sdeleuze

03/21/2016, 12:56 PM

Another example of such "issue": https://github.com/sdeleuze/geospatial-messenger/blob/master/src/test/kotlin/io/spring/messenger/MessageControllerTests.kt#L51-L52

paul_klym

03/21/2016, 1:06 PM

it worked, thanks for help!

sdeleuze

03/21/2016, 2:55 PM

Do you think this could be a bug @orangy or do you know why we have these kind of use case where Kotlin can’t find the Generic type where Java does?

sdeleuze

03/21/2016, 2:55 PM

@paul_klym: you’re welcome simple smile

sdeleuze

03/29/2016, 10:28 PM

Could we rename this channel #spring since it is not only about Spring Framework but also about other Spring projects like Spring Boot?

sdeleuze

03/29/2016, 10:32 PM

@paul_klym: I created https://youtrack.jetbrains.com/issue/KT-11658 about the issue you described

orangy

03/29/2016, 10:32 PM

has renamed the channel from "spring_framework" to "spring"

orangy

03/29/2016, 10:33 PM

@sdeleuze: done

👍 2

sdeleuze

03/29/2016, 10:41 PM

@orangy: Thanks

sdeleuze

03/29/2016, 10:42 PM

For people interested,

@Autowired

constructor is now optional with Spring Framework 4.3 on single constructor classes, see https://github.com/sdeleuze/geospatial-messenger/commit/8c6d1248ed1d8c7a8ac8a988c16882d0aad041e0 for a concrete example

👍 4

paul_klym

03/30/2016, 11:36 AM

@sdeleuze: ok, I added my case in comments to make it clear

👍 1

jasper

03/30/2016, 11:43 AM

@sdeleuze: Optional as in implicit?

sdeleuze

03/30/2016, 11:43 AM

Yes