olympus-athena

middle station logic engine

Most of the traffic of the middle station system comes from multiple systems, many of different logic dispose on same business.
middle-logic-engine support the front-system define a business identity, and use process engine handle all the different logic.
also support extend-point on satisfy certain conditions.
Follow the DDD driver model

architecture

Basic Architecture

Concepts

DDD driver model has three layer of hold system:

business system scope: front business system
business middle system scope: assembly capability domain provides the business process
ability scope: specific business capabilities

middle-logic-engine working on business middle system scope, define business process, add extend point, business scenario and life cycle.

guide

Step 1: engine needs at last one SceneProcessConfiguration, to description the class is engine scene configuration, and @SceneProcess for define a process.
Step 2: on spring main class, @EnableExtendPointAutoConfiguration({SceneProcessConfiguration.class}) to activate engine，require one or more SceneProcessConfiguration to load process
Step 3: in process define, implements StandardProcess<Req, Resp>, Req means parameter, and Resp means a empty that will fill in the process, so Req and Resp both must create before process start

Step 4:

instantiation a scheme to identify which business scene, like 全脸路流转流程, in this case, also have biz argument, biz for extension runner to match which ext execute is current process. ext needs Template,

@Template
public class OrderTemplate implements ExtensionTemplate {

    @Override
    public boolean adapterTemplate(BusinessScheme businessScheme) {
        return true;
    }


    @Override
    public String[] ofBizChannels() {
        // satisfy this condition
        return new String[]{"P担"};
    }

    @Override
    public Class<? extends Extension>[] ofExtension() {
        // this is ext will run in current process
        return new Class[]{OrderExtensionImpl.class};
    }
}

Step 5: