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event maching heuristic update

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This commit is contained in:
Kamil Patryk Kozakowski
2026-06-21 12:19:15 +02:00
parent e00f4dca81
commit 968601eefc
28 changed files with 1317 additions and 77 deletions
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8
state_machines/polymorphic_events_sample/src/main/java/click/kamil/examples/statemachine/polymorphic/AbcdEvent.java Normal file
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package click.kamil.examples.statemachine.polymorphic;
public class AbcdEvent implements CustomCodeEventInterface {
@Override
public OrderEvents resolveEventCode() {
return OrderEvents.ABCD;
}
}

2
state_machines/polymorphic_events_sample/src/main/java/click/kamil/examples/statemachine/polymorphic/BaseEvent.java Normal file
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package click.kamil.examples.statemachine.polymorphic;
public interface BaseEvent { OrderEvents getType(); }

4
state_machines/polymorphic_events_sample/src/main/java/click/kamil/examples/statemachine/polymorphic/CancelEvent.java Normal file
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package click.kamil.examples.statemachine.polymorphic;
public class CancelEvent implements BaseEvent {
@Override public OrderEvents getType() { return OrderEvents.CANCEL; }
}

5
state_machines/polymorphic_events_sample/src/main/java/click/kamil/examples/statemachine/polymorphic/CustomCodeEventInterface.java Normal file
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package click.kamil.examples.statemachine.polymorphic;
public interface CustomCodeEventInterface {
OrderEvents resolveEventCode();
}

11
state_machines/polymorphic_events_sample/src/main/java/click/kamil/examples/statemachine/polymorphic/EventBuilder.java Normal file
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package click.kamil.examples.statemachine.polymorphic;
public class EventBuilder {
public static BaseEvent buildEvent() {
return new FulfillEvent();
}
public BaseEvent buildInstanceEvent() {
return new CancelEvent();
}
}

4
state_machines/polymorphic_events_sample/src/main/java/click/kamil/examples/statemachine/polymorphic/FulfillEvent.java Normal file
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package click.kamil.examples.statemachine.polymorphic;
public class FulfillEvent implements BaseEvent {
@Override public OrderEvents getType() { return OrderEvents.FULFILL; }
}

9
state_machines/polymorphic_events_sample/src/main/java/click/kamil/examples/statemachine/polymorphic/MysteryPayload.java Normal file
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package click.kamil.examples.statemachine.polymorphic;
public class MysteryPayload implements CustomCodeEventInterface {
@Override
public OrderEvents resolveEventCode() {
int a = (int) (Math.random() * 10);
return a > 5 ? OrderEvents.ABCD : OrderEvents.PAY;
}
}

2
state_machines/polymorphic_events_sample/src/main/java/click/kamil/examples/statemachine/polymorphic/OrderEvents.java Normal file
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package click.kamil.examples.statemachine.polymorphic;
public enum OrderEvents { FULFILL, PAY, CANCEL, ABCD, NOPE, IGNORE }

23
state_machines/polymorphic_events_sample/src/main/java/click/kamil/examples/statemachine/polymorphic/OrderService.java Normal file
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package click.kamil.examples.statemachine.polymorphic;
import org.springframework.statemachine.StateMachine;
import org.springframework.stereotype.Service;
import org.springframework.messaging.support.MessageBuilder;
@Service
public class OrderService {
private final StateMachine<OrderStates, OrderEvents> sm;
public OrderService(StateMachine<OrderStates, OrderEvents> sm) { this.sm = sm; }
public void processEvent(BaseEvent event) {
sm.sendEvent(event.getType());
}
public void processPayloadEvent(Object payload) {
sm.sendEvent(MessageBuilder.withPayload(payload).build());
}
public void processCustomEvent(CustomCodeEventInterface event) {
sm.sendEvent(event.resolveEventCode());
}
}

2
state_machines/polymorphic_events_sample/src/main/java/click/kamil/examples/statemachine/polymorphic/OrderStates.java Normal file
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package click.kamil.examples.statemachine.polymorphic;
public enum OrderStates { SUBMITTED, PAID, FULFILLED, CANCELED, PAID1, PAID2, PAID3, INVALID, HAPPEN, SKIPPED, NEVER }

4
state_machines/polymorphic_events_sample/src/main/java/click/kamil/examples/statemachine/polymorphic/PayEvent.java Normal file
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package click.kamil.examples.statemachine.polymorphic;
public class PayEvent implements BaseEvent {
@Override public OrderEvents getType() { return OrderEvents.PAY; }
}

79
state_machines/polymorphic_events_sample/src/main/java/click/kamil/examples/statemachine/polymorphic/PolymorphicController.java Normal file
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package click.kamil.examples.statemachine.polymorphic;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RestController;
@RestController
public class PolymorphicController {
private final OrderService orderService;
public PolymorphicController(OrderService orderService) {
this.orderService = orderService;
}
@PostMapping("/pay")
public void pay() {
orderService.processEvent(new PayEvent());
}
@PostMapping("/fulfill")
public void fulfill() {
orderService.processEvent(new FulfillEvent());
}
@PostMapping("/cancel")
public void cancel() {
orderService.processEvent(new CancelEvent());
}
@PostMapping("/payload-pay")
public void payloadPay() {
orderService.processPayloadEvent(new PayEvent());
}
@PostMapping("/pay-variable")
public void payVariable() {
PayEvent event = new PayEvent();
orderService.processEvent(event);
}
@PostMapping("/pay-cast")
public void payCast() {
orderService.processEvent((BaseEvent) new PayEvent());
}
@PostMapping("/pay-ternary")
public void payTernary(boolean isPay) {
orderService.processEvent(isPay ? new PayEvent() : new CancelEvent());
}
@PostMapping("/pay-list")
public void payList() {
java.util.List<BaseEvent> events = java.util.Arrays.asList(new PayEvent(), new FulfillEvent());
for (BaseEvent event : events) {
orderService.processEvent(event);
}
}
@PostMapping("/pay-builder-static")
public void payBuilderStatic() {
orderService.processEvent(EventBuilder.buildEvent());
}
@PostMapping("/pay-builder-instance")
public void payBuilderInstance() {
EventBuilder builder = new EventBuilder();
orderService.processEvent(builder.buildInstanceEvent());
}
@PostMapping("/abcd")
public void abcd() {
orderService.processCustomEvent(new AbcdEvent());
}
@PostMapping("/mystery")
public void mystery() {
orderService.processCustomEvent(new MysteryPayload());
}
}

23
state_machines/polymorphic_events_sample/src/main/java/click/kamil/examples/statemachine/polymorphic/PolymorphicStateMachineConfiguration.java Normal file
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package click.kamil.examples.statemachine.polymorphic;
import org.springframework.context.annotation.Configuration;
import org.springframework.statemachine.config.EnableStateMachine;
import org.springframework.statemachine.config.EnumStateMachineConfigurerAdapter;
import org.springframework.statemachine.config.builders.StateMachineStateConfigurer;
import org.springframework.statemachine.config.builders.StateMachineTransitionConfigurer;
@Configuration
@EnableStateMachine
public class PolymorphicStateMachineConfiguration extends EnumStateMachineConfigurerAdapter<OrderStates, OrderEvents> {
@Override
public void configure(StateMachineStateConfigurer<OrderStates, OrderEvents> states) throws Exception {
states.withStates().initial(OrderStates.SUBMITTED).state(OrderStates.PAID).state(OrderStates.FULFILLED).state(OrderStates.CANCELED);
}
@Override
public void configure(StateMachineTransitionConfigurer<OrderStates, OrderEvents> transitions) throws Exception {
transitions
.withExternal().source(OrderStates.SUBMITTED).target(OrderStates.PAID).event(OrderEvents.PAY).and()
.withExternal().source(OrderStates.PAID).target(OrderStates.FULFILLED).event(OrderEvents.FULFILL).and()
.withExternal().source(OrderStates.SUBMITTED).target(OrderStates.CANCELED).event(OrderEvents.CANCEL).and()
.withExternal().source(OrderStates.PAID).target(OrderStates.CANCELED).event(OrderEvents.ABCD);
}
}

7
state_machines/polymorphic_events_sample/src/main/java/click/kamil/examples/statemachine/polymorphic/app/StateMachineApplication.java Normal file
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package click.kamil.examples.statemachine.polymorphic.app;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class StateMachineApplication {
public static void main(String[] args) { SpringApplication.run(StateMachineApplication.class, args); }
}

1
state_machines/polymorphic_events_sample/src/main/resources/application.properties Normal file
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spring.application.name=statemachinedemo