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Spring Roo: How to Solve "Integer cannot be cast to Long"

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Spring Roo: How to Solve "Integer cannot be cast to Long"

I'm a newbie to Spring Roo and while trying to create an application using Spring Roo and Vaadin.

· Java Zone ·
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Microservices. Streaming data. Event Sourcing and CQRS. Concurrency, routing, self-healing, persistence, clustering...learn how Akka enables Java developers to do all this out of the box! Brought to you in partnership with Lightbend.


I'm a newbie to Spring Roo and while trying to create an application using Spring  Roo and Vaadin, I suddenly started getting the following message from Spring Roo Shell:

java.lang.Integer cannot be cast to java.lang.Long

And all my Spring Roo environment stopped working.


After "googling" a lot, I've finally found one possible reason to this problem, at least it was my case. So I'd like to share.


In my case I have annotated some fields with @Min(1) or @Max(9) for example, and what I didn't know is that those annotations takes a long parameter, not a integer parameter.


Then after changing @Min(1) to @Min(1L), the same to @Max annotations, the problem has gone and my Spring Roo environment is working again.


Thanx to this post http://www.manning-sandbox.com/thread.jspa?threadID=39831&tstart=0

Microservices. Streaming data. Event Sourcing and CQRS. Concurrency, routing, self-healing, persistence, clustering...learn how Akka enables Java developers to do all this out of the box! Brought to you in partnership with Lightbend. 

Topics:
java ,frameworks ,java spring roo

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