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package click.kamil.examples.statemachine.complex;
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import org.springframework.context.annotation.Configuration;
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import org.springframework.statemachine.action.Action;
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import org.springframework.statemachine.config.EnableStateMachineFactory;
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import org.springframework.statemachine.config.StateMachineConfigurerAdapter;
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import org.springframework.statemachine.config.builders.StateMachineConfigurationConfigurer;
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import org.springframework.statemachine.config.builders.StateMachineStateConfigurer;
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import org.springframework.statemachine.config.builders.StateMachineTransitionConfigurer;
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import org.springframework.statemachine.guard.Guard;
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import java.util.EnumSet;
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@Configuration
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@EnableStateMachineFactory(name = "complexStateMachineFactory")
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public class ComplexStateMachineConfig extends StateMachineConfigurerAdapter<ComplexStateMachineConfig.States, ComplexStateMachineConfig.Events> {
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public enum States {
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STATE1, STATE2, STATE3, STATE4, STATE5,
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STATE6, STATE7, STATE8, STATE9, STATE10,
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STATE11, STATE12, STATE13, STATE14, STATE15,
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STATE16, STATE17, STATE18, STATE19, STATE20
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}
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public enum Events {
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EVENT1, EVENT2, EVENT3, EVENT4, EVENT5,
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EVENT6, EVENT7, EVENT8, EVENT9, EVENT10,
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EVENT11, EVENT12, EVENT13, EVENT14, EVENT15
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}
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@Override
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public void configure(StateMachineConfigurationConfigurer<States, Events> config) throws Exception {
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config
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.withConfiguration()
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.autoStartup(true);
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}
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@Override
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public void configure(StateMachineStateConfigurer<States, Events> states) throws Exception {
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states
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.withStates()
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.initial(States.STATE1)
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.states(EnumSet.allOf(States.class))
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.stateEntry(States.STATE5, logEntryAction("Entered STATE5"))
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.stateExit(States.STATE10, logExitAction("Exited STATE10"));
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}
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@Override
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public void configure(StateMachineTransitionConfigurer<States, Events> transitions) throws Exception {
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// External transitions
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transitions
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.withExternal().source(States.STATE1).target(States.STATE2).event(Events.EVENT1)
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.and()
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.withExternal().source(States.STATE2).target(States.STATE3).event(Events.EVENT2)
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.and()
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.withExternal().source(States.STATE3).target(States.STATE4).event(Events.EVENT3)
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.and()
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.withExternal().source(States.STATE4).target(States.STATE5).event(Events.EVENT4)
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.and()
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.withExternal().source(States.STATE5).target(States.STATE6).event(Events.EVENT5)
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.and()
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.withExternal().source(States.STATE6).target(States.STATE7).event(Events.EVENT6)
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.and()
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.withExternal().source(States.STATE7).target(States.STATE8).event(Events.EVENT7)
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.and()
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.withExternal().source(States.STATE8).target(States.STATE9).event(Events.EVENT8)
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.and()
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.withExternal().source(States.STATE9).target(States.STATE10).event(Events.EVENT9)
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.and()
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.withExternal().source(States.STATE10).target(States.STATE11).event(Events.EVENT10)
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.and()
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.withExternal().source(States.STATE11).target(States.STATE12).event(Events.EVENT11)
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.and()
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.withExternal().source(States.STATE12).target(States.STATE13).event(Events.EVENT12)
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.and()
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.withExternal().source(States.STATE13).target(States.STATE14).event(Events.EVENT13)
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.and()
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.withExternal().source(States.STATE14).target(States.STATE15).event(Events.EVENT14)
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.and()
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.withExternal().source(States.STATE15).target(States.STATE16).event(Events.EVENT15);
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// Choice transitions (at least 10)
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transitions
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.withChoice()
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.source(States.STATE16)
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.first(States.STATE17, guardVarEquals("value1"))
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.then(States.STATE18, guardVarEquals("value2"))
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.last(States.STATE19)
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.and()
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.withChoice()
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.source(States.STATE17)
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.first(States.STATE20, guardEventHeaderEquals("header1", "foo"))
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.last(States.STATE16)
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.and()
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.withChoice()
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.source(States.STATE18)
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.first(States.STATE19, guardVarEquals("value3"))
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.last(States.STATE20)
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.and()
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.withChoice()
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.source(States.STATE19)
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.first(States.STATE1, guardVarEquals("reset"))
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.last(States.STATE20)
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.and()
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.withChoice()
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.source(States.STATE20)
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.first(States.STATE5, guardEventHeaderEquals("header2", "bar"))
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.last(States.STATE1)
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.and()
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.withChoice()
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.source(States.STATE11)
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.first(States.STATE13, guardVarEquals("goTo13"))
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.then(States.STATE14, guardVarEquals("goTo14"))
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.last(States.STATE15)
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.and()
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.withChoice()
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.source(States.STATE12)
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.first(States.STATE10, guardVarEquals("goBack10"))
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.last(States.STATE11)
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.and()
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.withChoice()
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.source(States.STATE14)
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.first(States.STATE12, guardVarEquals("loop12"))
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.last(States.STATE16)
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.and()
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.withChoice()
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.source(States.STATE9)
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.first(States.STATE8, guardVarEquals("stepBack"))
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.then(States.STATE7, guardVarEquals("stepBackMore"))
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.last(States.STATE6)
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.and()
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.withChoice()
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.source(States.STATE8)
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.first(States.STATE9, guardVarEquals("forward9"))
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.last(States.STATE10);
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}
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private Guard<States, Events> guardVarEquals(String expected) {
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return context -> {
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Object var = context.getExtendedState().getVariables().get("var");
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return expected.equals(var);
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};
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}
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private Guard<States, Events> guardEventHeaderEquals(String headerName, String expected) {
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return context -> {
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Object header = context.getMessageHeader(headerName);
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return expected.equals(header);
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};
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}
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private Action<States, Events> logEntryAction(String msg) {
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return context -> System.out.println(msg);
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}
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private Action<States, Events> logExitAction(String msg) {
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return context -> System.out.println(msg);
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}
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}
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@@ -0,0 +1,11 @@
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package click.kamil.examples.statemachine.complex.app;
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import org.springframework.boot.SpringApplication;
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import org.springframework.boot.autoconfigure.SpringBootApplication;
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@SpringBootApplication
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class StateMachineApplication {
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public static void main(String[] args) {
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SpringApplication.run(StateMachineApplication.class, args);
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}
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}
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@@ -0,0 +1 @@
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spring.application.name=statemachinedemo
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