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Kamil Patryk Kozakowski
2026-06-06 20:40:54 +02:00
parent 3449aead51
commit 38f960dc55
17 changed files with 814 additions and 87 deletions
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203
state_machines/inheritance_extra_functions_state_machine/src/main/java/click/kamil/examples/statemachine/inheritanceextrafunctionsstate/AbstractOneStateMachineConfiguration.java Normal file
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package click.kamil.examples.statemachine.inheritanceextrafunctionsstate;
import org.springframework.statemachine.action.Action;
import org.springframework.statemachine.config.builders.StateMachineConfigurationConfigurer;
import org.springframework.statemachine.config.builders.StateMachineStateConfigurer;
import org.springframework.statemachine.config.builders.StateMachineTransitionConfigurer;
import org.springframework.statemachine.config.configurers.ExternalTransitionConfigurer;
import org.springframework.statemachine.config.configurers.StateConfigurer;
import org.springframework.statemachine.guard.Guard;
abstract class AbstractOneStateMachineConfiguration extends AbstractStateMachineConfiguration<States, Events> {
protected abstract void addAdditionalStates(StateConfigurer<States, Events> states);
protected abstract void addAdditionalCancellationTransitions(StateMachineTransitionConfigurer<States, Events> transitions);
protected abstract void addAdditionalTransitions(ExternalTransitionConfigurer<States, Events> transitions) throws Exception;
protected void addAllCancellationTransitionsForSource(StateMachineTransitionConfigurer<States, Events> transitions, States source) {
addCancellationTransitionForCancelEvents(transitions, source, Events.EVENT_CANCEL, Events.EVENT_CANCEL_2);
}
private void addCancellationTransitionForCancelEvents(
StateMachineTransitionConfigurer<States, Events> transitions,
States source,
Events... cancelEvents) {
addTransitionForMultipleEvents(
transitions,
source,
States.CANCEL,
transitionConfigurer -> transitionConfigurer.action((context) -> System.out.println(context.getEvent().toString() + " " + context.getTransition().toString())),
cancelEvents
);
}
@Override
public void configure(StateMachineConfigurationConfigurer<States, Events> config) throws Exception {
config
.withConfiguration()
.autoStartup(true);
}
@Override
public void configure(StateMachineStateConfigurer<States, Events> states) throws Exception {
StateConfigurer<States, Events> end = states
.withStates()
.initial(States.STATE1)
.state(States.STATE2)
.state(States.STATE3)
.state(States.STATE4)
.state(States.STATE5)
.state(States.STATE6)
.state(States.STATE7)
.state(States.STATE8)
.state(States.STATE9)
.state(States.STATE10)
.state(States.STATE11)
.state(States.STATE12)
.state(States.STATE13)
.state(States.STATE14)
.state(States.STATE15)
.state(States.STATE16)
.state(States.STATE17)
.state(States.STATE18)
.state(States.STATE19)
.state(States.STATE20)
.state(States.STATEX)
.choice(States.STATEY)
.end(States.STATEZ);
addAdditionalStates(end);
}
@Override
public void configure(StateMachineTransitionConfigurer<States, Events> transitions) throws Exception {
// External transitions
ExternalTransitionConfigurer<States, Events> t1 = transitions
.withExternal().source(States.STATE1).target(States.STATE2).event(Events.EVENT1)
.and()
.withExternal().source(States.STATE2).target(States.STATE3).event(Events.EVENT2)
.and()
.withExternal().source(States.STATE3).target(States.STATE4).event(Events.EVENT3)
.and()
.withExternal().source(States.STATE4).target(States.STATE5).event(Events.EVENT4)
.and()
.withExternal().source(States.STATE5).target(States.STATE6).event(Events.EVENT5)
.and()
.withExternal().source(States.STATE6).target(States.STATE7).event(Events.EVENT6)
.and()
.withExternal().source(States.STATE7).target(States.STATE8).event(Events.EVENT7)
.and()
.withExternal().source(States.STATE8).target(States.STATE9).event(Events.EVENT8)
.and()
.withExternal().source(States.STATE9).target(States.STATE10).event(Events.EVENT9)
.and()
.withExternal().source(States.STATE10).target(States.STATE11).event(Events.EVENT10)
.and()
.withExternal().source(States.STATE11).target(States.STATE12).event(Events.EVENT11)
.and()
.withExternal().source(States.STATE12).target(States.STATE13).event(Events.EVENT12)
.and()
.withExternal().source(States.STATE13).target(States.STATE14).event(Events.EVENT13)
.and()
.withExternal().source(States.STATE14).target(States.STATE15).event(Events.EVENT14)
.and()
.withExternal().source(States.STATE15).target(States.STATE16).event(Events.EVENT15);
transitions.withExternal().source(States.STATE1).target(States.CANCEL).event(Events.EVENT_CANCEL)
.and()
.withExternal().source(States.STATE2).target(States.CANCEL).event(Events.EVENT_CANCEL)
.and()
.withExternal().source(States.STATE3).target(States.CANCEL).event(Events.EVENT_CANCEL)
.and()
.withExternal().source(States.STATE4).target(States.CANCEL).event(Events.EVENT_CANCEL)
.and()
.withExternal().source(States.STATE5).target(States.CANCEL).event(Events.EVENT_CANCEL);
// EXTRA CHOICE
transitions.withExternal().source(States.STATE4).target(States.STATEY).event(Events.EVENTY);
transitions.withChoice().source(States.STATEY).first(States.STATEX, guardVarEquals("value1")).last(States.STATEZ);
// Choice transitions (at least 10)
transitions
.withChoice()
.source(States.STATE16)
.first(States.STATE17, guardVarEquals("value1"))
.then(States.STATE18, guardVarEquals("value2"))
.last(States.STATE19)
.and()
.withChoice()
.source(States.STATE17)
.first(States.STATE20, guardEventHeaderEquals("header1", "foo"))
.last(States.STATE16)
.and()
.withChoice()
.source(States.STATE18)
.first(States.STATE19, guardVarEquals("value3"))
.last(States.STATE20)
.and()
.withChoice()
.source(States.STATE19)
.first(States.STATE1, guardVarEquals("reset"))
.last(States.STATE20)
.and()
.withChoice()
.source(States.STATE20)
.first(States.STATE5, guardEventHeaderEquals("header2", "bar"))
.last(States.STATE1)
.and()
.withChoice()
.source(States.STATE11)
.first(States.STATE13, guardVarEquals("goTo13"))
.then(States.STATE14, guardVarEquals("goTo14"))
.last(States.STATE15)
.and()
.withChoice()
.source(States.STATE12)
.first(States.STATE10, guardVarEquals("goBack10"))
.last(States.STATE11)
.and()
.withChoice()
.source(States.STATE14)
.first(States.STATE12, guardVarEquals("loop12"))
.last(States.STATE16)
.and()
.withChoice()
.source(States.STATE9)
.first(States.STATE8, guardVarEquals("stepBack"))
.then(States.STATE7, guardVarEquals("stepBackMore"))
.last(States.STATE6)
.and()
.withChoice()
.source(States.STATE8)
.first(States.STATE9, guardVarEquals("forward9"))
.last(States.STATE10);
addAdditionalTransitions(t1);
addAdditionalCancellationTransitions(transitions);
}
private Guard<States, Events> guardVarEquals(String expected) {
return context -> {
Object var = context.getExtendedState().getVariables().get("var");
return expected.equals(var);
};
}
private Guard<States, Events> guardEventHeaderEquals(String headerName, String expected) {
return context -> {
Object header = context.getMessageHeader(headerName);
return expected.equals(header);
};
}
private Action<States, Events> logEntryAction(String msg) {
return context -> System.out.println(msg);
}
private Action<States, Events> logExitAction(String msg) {
return context -> System.out.println(msg);
}
}

27
state_machines/inheritance_extra_functions_state_machine/src/main/java/click/kamil/examples/statemachine/inheritanceextrafunctionsstate/AbstractStateMachineConfiguration.java Normal file
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package click.kamil.examples.statemachine.inheritanceextrafunctionsstate;
import org.springframework.statemachine.config.StateMachineConfigurerAdapter;
import org.springframework.statemachine.config.builders.StateMachineTransitionConfigurer;
import org.springframework.statemachine.config.configurers.ExternalTransitionConfigurer;
import java.util.function.Consumer;
import java.util.stream.Stream;
class AbstractStateMachineConfiguration<S,E> extends StateMachineConfigurerAdapter<S,E> {
protected void addTransitionForMultipleEvents(
StateMachineTransitionConfigurer<S, E> transitions,
S source,
S target,
Consumer<ExternalTransitionConfigurer<S,E>> transitionCustomizer,
E... events) {
Stream.of(events).forEach(event -> {
try {
ExternalTransitionConfigurer<S, E> transitionConfigurer =
transitions.withExternal().event(event).source(source).target(target);
transitionCustomizer.accept(transitionConfigurer);
} catch (Exception e) {
throw new IllegalStateException(e);
}
});
}
}

8
state_machines/inheritance_extra_functions_state_machine/src/main/java/click/kamil/examples/statemachine/inheritanceextrafunctionsstate/Events.java Normal file
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package click.kamil.examples.statemachine.inheritanceextrafunctionsstate;
public enum Events {
EVENT1, EVENT2, EVENT3, EVENT4, EVENT5,
EVENT6, EVENT7, EVENT8, EVENT9, EVENT10,
EVENT11, EVENT12, EVENT13, EVENT14, EVENT15,
EVENTX, EVENTY, EVENTZ, EVENT_CANCEL, EVENT_CANCEL_2
}

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state_machines/inheritance_extra_functions_state_machine/src/main/java/click/kamil/examples/statemachine/inheritanceextrafunctionsstate/OneStateMachineConfiguration.java Normal file
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package click.kamil.examples.statemachine.inheritanceextrafunctionsstate;
import org.springframework.statemachine.config.builders.StateMachineTransitionConfigurer;
import org.springframework.statemachine.config.configurers.ExternalTransitionConfigurer;
import org.springframework.statemachine.config.configurers.StateConfigurer;
class OneStateMachineConfiguration extends AbstractOneStateMachineConfiguration {
@Override
protected void addAdditionalStates(StateConfigurer<States, Events> states) {
states.state(States.STATE_EXTRA_1);
}
@Override
protected void addAdditionalCancellationTransitions(StateMachineTransitionConfigurer<States, Events> transitions) {
addAllCancellationTransitionsForSource(transitions, States.STATE_EXTRA_1);
}
@Override
protected void addAdditionalTransitions(ExternalTransitionConfigurer<States, Events> transitions) throws Exception {
transitions
.and()
.withExternal().event(Events.EVENTX)
.source(States.STATE5)
.target(States.STATE_EXTRA_1);
}
}

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state_machines/inheritance_extra_functions_state_machine/src/main/java/click/kamil/examples/statemachine/inheritanceextrafunctionsstate/States.java Normal file
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package click.kamil.examples.statemachine.inheritanceextrafunctionsstate;
public enum States {
STATE1, STATE2, STATE3, STATE4, STATE5,
STATE6, STATE7, STATE8, STATE9, STATE10,
STATE11, STATE12, STATE13, STATE14, STATE15,
STATE16, STATE17, STATE18, STATE19, STATE20,
STATEX, STATEY, STATEZ, STATE_EXTRA_1, CANCEL
}

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

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

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state_machines/inheritance_extra_functions_state_machine/src/test/java/click/kamil/examples/statemachine/MyTest.java Normal file
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package click.kamil.examples.statemachine;
import org.junit.jupiter.api.Test;
class MyTest {
@Test
void contextLoads() {
}
}