Set constant value from application.yaml for timer start event

Camunda 7 Topics Discussion & Questions
1

I use timer start event and want to set duration value from application.yaml.
I tried setting ${application.issueSessionTimeout}, but it doesn’t work.
Result:

org.camunda.bpm.engine.impl.javax.el.PropertyNotFoundException: Cannot resolve identifier 'application'

My application.yaml:

application:
  issueSessionTimeout: PT30M

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2

Hi,

in many model properties you can use SpEL expressions to access components defined in Spring. The SpEL refers to something available in Spring - let’s call it a bean. Properties from your configuration (YML or properties file) may be exposed as beans. For doing so you need to define a class and bind it. Something like this:

@ConfigurationProperties(prefix="application")
@Data // lombok or define getters setters
public class ApplicationProperties {
    private String issueSessionTimeout;
}

To activate properties binding and expose the properties class to your configuration of Spring Boot, you will need the following:

@Configuration
@EnableConfigurationProperties(ApplicationProperties.class)
public class ApplicationConfiguration {

  @Bean 
  // the name of this method is the name of the bean, or you pass it
  // into the @Bean annotation.
  public ApplicationProperites application(ApplicationProperites properties) {
    return this;
  }
}

By doing all this, you create a bean factory which will create a Spring Bean called application available in your Spring Context. Now you can reference this Bean from your SpEL expressions (overall, and in process models too).

Hope this helps,

Cheers,

Simon