Flowable-Admin - problem with Variables

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1

Hi,

I tried the new version Flowable (6.1.1) and found that Flowable-Admin UI app has a problem with Variables show. When I set custom Object with settings(strings…) as variable and I start the proces, then in Flowable-Admin UI app I do not see the variables (attached screen). Would you please look at it.

Best regards
Livio

bug
bug.jpg1311×752 98.6 KB

2

I’ve tested it with an object variable, and it’s shown in the overview (although the value is shown as binary as it doesn’t know how to display it):

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Screen Shot 2017-07-29 at 11.34.10.png1734×678 32 KB

What kind of variable are you using? How are you setting it? Any stacktrace?

3

Hi Joram,

I used only a string variable in my object. Variables are not showing becouse I’m having a problem with “deserialize object in variable”.

Link to my test project:

I have no idea.
I’m grateful for every advice.

Best regards
Livio

4

Hi Joram,

It already works. I’m sorry, my fault. I forgot to add jar file with my source code to Tomcat’s lib folder.

I have a question about adding custom mechanism for serializing. What should I do when I want the FlowableUI app knows my own serialization?

Thanks for your advice.
Livio

5

Depends on what you want to serialize? What kind of object? Is it needed to serialize it or is storing an identifier(and do a lookup) enough?

For the rest api, you can have custom serializers, see http://www.flowable.org/docs/userguide/index.html#_request_parameters :

It’s possible to support additional variable-types with a custom JSON representation (either simple value or complex/nested JSON object). By extending the initializeVariableConverters() method on org.flowable.rest.service.api.RestResponseFactory, you can add additional org.flowable.rest.service.api.engine.variable.RestVariableConverter classes to support converting your POJO’s to a format suitable for transferring through REST and converting the REST-value back to your POJO. The actual transformation to JSON is done by Jackson.

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6

Hi @joram ,

Could you please guide me on a clean way to extend the initializeVariableConverters method on RestResponseFactory.
I was trying to produce a custom RestResponseFactory bean in my Spring Boot 2 application which depends on flowable-spring-boot-starter-process-rest maven artifact.
However it looks not easy as this component is produced by the ProcessEngineRestConfiguration class which is used/registered with the help of the BaseRestApiConfiguration#registerServlet method.

Thanks,
Rémi

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