jBPM document as a variable

[fructokinase]

Hi, I have a simple process on jBPM6.2 with 2 user tasks: User1 uploads a file and User2 sees the file.

The input form has a document type field bind to the output (first task). When I run an instance and attempts the complete the upload task, I get the following error

Other processes that don't involve uploading a file seem to persist correctly into h2 database.

If you know how to attach a document into onto a user task and passing the document on as a variable within the process I would love to hear about it.

Help would be appreciated, thanks in advance.

[swiderski.maciej]

you need to use document marshaling strategy to avoid storing actual file in db which might be the issue here. See docs for details on how to configure it.

HTH

[rafael.pino]

Hi Maciej.

What if I need to upload multiple documents? How can it be accomplished?. Thanks.

[swiderski.maciej]

either use many variables of document type or use recently added (7.6.0) Documents type that has also new marshaling strategy to deal with many documents.

JBPM-6502 - Support collection of documents. (#1034) · kiegroup/jbpm@10afa92 · GitHub

HTH

[rafael.pino]

Hi Maciej. Thank you for your help.

I've set up the new Documents Strategy in my deployment descriptor.

Also, I've created a process variable definition documents : org.jbpm.documents.Documents.

Then, I've set up a human task with an input variable using de documents definition.

But when I try to create a Form using the input variable, I can't asign a nested form and then the form designer shows an error on this field.

What I'm doing wrong or what I'm missing?.

Thank you again.

[rafael.pino]

Also I see the following exception in the server log:

Caused by: java.lang.IllegalArgumentException: Unable to create instance (no arg constructor) of type org.jbpm.document.marshalling.DocumentsMarshallingStrategy due to org.jbpm.document.marshalling.DocumentsMarshallingStrategy

  at org.jbpm.runtime.manager.impl.deploy.ReflectionObjectModelResolver.getInstance(ReflectionObjectModelResolver.java:78)

  at org.jbpm.kie.services.impl.KModuleDeploymentService.getInstanceFromModel(KModuleDeploymentService.java:345)

  at org.jbpm.kie.services.impl.KModuleDeploymentService.boostrapRuntimeEnvironmentBuilder(KModuleDeploymentService.java:291)

  at org.jbpm.kie.services.impl.KModuleDeploymentService.deploy(KModuleDeploymentService.java:193)

  ... 56 more

Caused by: java.lang.InstantiationExce

rafael.pino  wrote:

Hi Maciej. Thank you for your help.

I've set up the new Documents Strategy in my deployment descriptor.

Also, I've created a process variable definition documents : org.jbpm.documents.Documents.

Then, I've set up a human task with an input variable using de documents definition.

But when I try to create a Form using the input variable, I can't asign a nested form and then the form designer shows an error on this field.

What I'm doing wrong or what I'm missing?.

Thank you again.