CODEWITHSUNDEEP
javaejbcdiactiviti
billdoor
billdoor

Reputation: 2043

Activiti - DelegateExpression not Resolving

I am trying to integrate the Activiti-BPM Framework into a Java EE Webapplication. The main goal at the Moment is, to inject an EJB as DelegateExpression into a Servicetask (to handle Database operations).

I read that Activiti does not (yet) work with EJBs, so i annotated the class like this:

@Named
@LocalBean
@Stateless
@Dependent
public class DatabaseWriter implements JavaDelegate {...}

and try to inject it in multiple ways like this:

activiti:delegateExpression="${DatabaseWriter}"
activiti:delegateExpression="DatabaseWriter"
activiti:delegateExpression="$DatabaseWriter"

respectivley to check if it is just a Bug or something:

activiti:expression="${DatabaseWriter.execute(execution)}"

In any case i get exceptions like "could not resolve DatabaseWriter, no bean foudn that implements JavaDelegate with name DatabseWriter ..."

I tested the Class itself - by not using cdi - JPA does nto work, but the class can be instantiated by Activiti and the execute method is executed - so the class code itself is ok.

I also tried injecting the class in a JAX-RS EJB - both with CDI and @EJB - it works. The problem definetly lies with my way of trying to bring it into Activiti.

I also made a Screenshot of the Problem (all code, xml, and a logmessage) for better understanding, if it helps:

http://s29.postimg.org/tmiknudjb/problem.jpg

Thanks for help or tipps!

Regards, BillDoor

Upvotes: 0

Views: 802

Answers (1)

Petar Butkovic
Petar Butkovic

Reputation: 1900

From the Oracle documentation

Annotating the boundary (Cart) with the @Named annotation makes the Cart immediately visible for expression language (EL) expressions in JSP and JSF. This @Named annotation takes the simple name of the annotated class, puts the first character in lowercase, and exposes it directly to the JSF pages (or JSP).

Activiti uses same expression language(EL) so my guess is to you try with;

activiti:delegateExpression="${databaseWriter}"

Also, I nevered use EJB and Activiti so I'm just guessing, but upper example is how it works with Spring.

Hope it helps.

Upvotes: 2

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