Condition Expression in Camunda 8

Camunda 8 Topics Discussion & Questions
1

Hello,

We are migrating from Camunda 7 to Camunda 8. So we are using condition expression of exclusive gateway like this object.someMethod(parameters)==true but was getting syntoxError : expression expected.
How can we use condition expression in camunda 8??

Thanks in advance

2

Hi @riya,
Camunda 8 uses a different expression language called FEEL, which is part of the DMN standard.
Check out our documentation, which included an interactive tutorial and a playground:

Comparisons use a single = as well. To check whether the field of an object equals the value true, write:

object.variable = true

See boolean expressions for more details and examples.

Please note, you cannot simply call custom functions in a FEEL expression.

3

Hi @StephanHaarmann

we cannot simply call custom functions in a FEEL expression.
like ==> context.getFromContext(‘FLG_IS_ITEM_RECOLLECTED’)=false
Here, context is object, which is stored as task variable and we are trying to call a method using that object
Its not a custom function, object will be part of process instance variables and we are trying to access that method

4

In Camunda 8, variables can be structured (i.e., have fields) or they can be atomic. However, it is not possible to have a full-fledged java object as a variable and so it’s not possible to call one of its methods. When you store an object as a process variable in Camunda 8, you need to serialize it. The expressions will work directly on the serialization.

Camunda 8 does not support remote code execution for performance and security reasons.

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