Question: Spring Boot starter with shared engine?

[miwoe]

Hi,

I am currently trying to deploy a Spring Boot application with a shared process engine on a tomcat. I thought I have the solution, but it seems that I have two different application contexts running. I cannot autowire dependencies like RuntimeService.

Is there any example available for using Spring Boot with a shared engine on a servlet container?

Best Regards,
Michael

[jangalinski]

Hm. You probably know the war example https://github.com/camunda/camunda-bpm-spring-boot-starter/tree/master/examples/example-war
Buts thats still using an embedded engine. I wonder why I would want to use spring boot in a shared engine scenario anyway. Could you please elaborate what problem you are trying to solve? I mean if the engine is configured via platform.xml anyway, a normal engine-spring application would be enough, this extension mainly deals with configuring/starting and deploying the engine ...

[miwoe]

We are using Camunda in a layered microservice context and some services are controlled by BPM process. As the BPM process is invoking some other BPM processes of other domains, we preferred a shared engine with a central Camunda installation and its central cockpit and administration tools.

I have solved the problem with the examples by propagating the process engine in the Spring Context:

    @Bean
    public ProcessEngineService getProcessEngineService() {
        return BpmPlatform.getProcessEngineService();
    }

    @Bean
    public ProcessEngine getProcessEngine() {
        return this.getProcessEngineService().getDefaultProcessEngine();
    }

[thanigachalamp]

Hi,

I am also using Camunda in a layered microservice context and some services are controlled by BPM process. As the BPM process is invoking some other BPM processes of other domains, we preferred a shared engine with a central Camunda installation and its central cockpit and administration tools.

I have followed above steps, but always process engine is null this.processEngineService().getDefaultProcessEngine().

Listed out the steps:

1. Downloaded Tomcat
2. Downloaded camunda-webapp-tomcat-standalone-7.14.0.war, unzip and drop it in the webapps
3. My own spring boot application is build and when i tried to deployed into same tomcat, always got null processEngineService().getDefaultProcessEngine()

Please find the sample code:
@bean
public ProcessEngineService processEngineService() {
return BpmPlatform.getProcessEngineService();
}
@bean(destroyMethod = "")
public ProcessEngine processEngine(){
ProcessEngine processEngine = this.processEngineService().getDefaultProcessEngine();
System.out.println(" Process engine is successfully created "+processEngine);
return processEngine;
}
@bean
public SpringProcessApplication processApplication()
{
return new SpringProcessApplication();
}

org.camunda.bpm camunda-engine provided org.camunda.bpm camunda-engine-spring org.springframework spring-context org.apache.tomcat.embed tomcat-embed-jasper provided org.springframework.boot spring-boot-starter-tomcat provided org.springframework.boot spring-boot-starter-web

Please help me to resolve