Add complex showcase sm sample
This commit is contained in:
Janne Valkealahti
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package demo.showcase;
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import org.springframework.context.annotation.Bean;
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import org.springframework.context.annotation.Configuration;
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import org.springframework.shell.Bootstrap;
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import org.springframework.statemachine.StateContext;
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import org.springframework.statemachine.action.Action;
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import org.springframework.statemachine.config.EnableStateMachine;
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import org.springframework.statemachine.config.EnumStateMachineConfigurerAdapter;
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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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@Configuration
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public class Application {
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//tag::snippetA[]
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@Configuration
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@EnableStateMachine
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static class StateMachineConfig
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extends EnumStateMachineConfigurerAdapter<States, Events> {
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@Override
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public void configure(StateMachineStateConfigurer<States, Events> states)
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throws Exception {
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states
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.withStates()
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.initial(States.S0)
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.state(States.S0)
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.and()
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.withStates()
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.parent(States.S0)
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.initial(States.S1)
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.state(States.S1)
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.and()
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.withStates()
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.parent(States.S1)
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.initial(States.S11)
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.state(States.S11)
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.and()
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.withStates()
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.parent(States.S0)
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.state(States.S2)
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.and()
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.withStates()
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.parent(States.S2)
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.initial(States.S21)
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.state(States.S21)
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.and()
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.withStates()
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.parent(States.S21)
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.initial(States.S211)
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.state(States.S211);
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}
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@Override
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public void configure(StateMachineTransitionConfigurer<States, Events> transitions)
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throws Exception {
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transitions
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.withExternal()
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.source(States.S1).target(States.S1).event(Events.A)
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.action(fooAction())
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.and()
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.withExternal()
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.source(States.S1).target(States.S11).event(Events.B)
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.and()
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.withExternal()
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.source(States.S21).target(States.S211).event(Events.B)
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.and()
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.withExternal()
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.source(States.S1).target(States.S2).event(Events.C)
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.and()
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.withExternal()
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.source(States.S2).target(States.S1).event(Events.C)
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.and()
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.withExternal()
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.source(States.S1).target(States.S0).event(Events.D)
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.and()
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.withExternal()
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.source(States.S211).target(States.S21).event(Events.D)
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.and()
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.withExternal()
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.source(States.S0).target(States.S211).event(Events.E)
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.and()
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.withExternal()
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.source(States.S1).target(States.S211).event(Events.F)
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.and()
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.withExternal()
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.source(States.S2).target(States.S11).event(Events.F)
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.and()
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.withExternal()
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.source(States.S11).target(States.S211).event(Events.G)
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.and()
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.withExternal()
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.source(States.S211).target(States.S0).event(Events.G)
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.and()
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.withExternal()
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.source(States.S21).target(States.S21).event(Events.H)
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.guard(fooGuard());
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}
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@Bean
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public FooGuard fooGuard() {
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return new FooGuard();
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}
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@Bean
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public FooAction fooAction() {
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return new FooAction();
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}
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}
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//end::snippetA[]
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//tag::snippetB[]
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public static enum States {
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S0, S1, S11, S2, S21, S211
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}
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//end::snippetB[]
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//tag::snippetC[]
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public static enum Events {
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A, B, C, D, E, F, G, H
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}
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//end::snippetC[]
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// tag::snippetD[]
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private static class FooAction implements Action<States, Events> {
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@Override
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public void execute(StateContext<States, Events> context) {
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context.getExtendedState().getVariables().put("foo", 1);
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}
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}
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// end::snippetD[]
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// tag::snippetE[]
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private static class FooGuard implements Guard<States, Events> {
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@Override
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public boolean evaluate(StateContext<States, Events> context) {
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Object foo = context.getExtendedState().getVariables().get("foo");
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return !(foo == null || !foo.equals(1));
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}
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}
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// end::snippetE[]
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public static void main(String[] args) throws Exception {
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Bootstrap.main(args);
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}
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}
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@@ -0,0 +1,20 @@
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package demo.showcase;
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import org.springframework.shell.core.annotation.CliCommand;
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import org.springframework.shell.core.annotation.CliOption;
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import org.springframework.stereotype.Component;
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import demo.AbstractStateMachineCommands;
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import demo.showcase.Application.Events;
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import demo.showcase.Application.States;
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@Component
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public class StateMachineCommands extends AbstractStateMachineCommands<States, Events> {
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@CliCommand(value = "sm event", help = "Sends an event to a state machine")
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public String event(@CliOption(key = { "", "event" }, mandatory = true, help = "The event") final Events event) {
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getStateMachine().sendEvent(event);
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return "Event " + event + " send";
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}
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}
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@@ -0,0 +1,8 @@
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<?xml version="1.0" encoding="UTF-8"?>
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<beans xmlns="http://www.springframework.org/schema/beans"
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xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xmlns:context="http://www.springframework.org/schema/context"
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xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
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http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">
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<context:component-scan base-package="demo" />
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</beans>
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@@ -0,0 +1,33 @@
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+---------------------------------------------------------------------------------------------+
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| S0 |
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+---------------------------------------------------------------------------------------------+
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| entry/ |
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| exit/ |
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| +-------------------------+ +--------------------------------------------+ |
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| *-->| S1 | | S2 | |
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| +-------------------------+ C +--------------------------------------------+ |
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| | entry/ | | entry/ H | |
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| D | exit/ |----->| exit/ +-------------------+ | |
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|<<---------| | | | H[foo.equals(1)]; | | |
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| | +---------------+ | C | +------------------------------+ | | |
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| | *-->| S11 | |<-----| *-->| S21 |<--+ | |
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| | +---------------+ | | +------------------------------+ | |
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| +--| | entry/ | | F | | entry/ | | |
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| A| | | exit/ |<---------| | exit/ | | |
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| +->| | | | | | +--------------+ | | |
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| A[foo 1]; | B | | | | | *-->| s211 | | | |
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| |---->| | | | F | +--------------+ | | |
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| | | | |-------------------->| entry/ | | G | |
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| | | | | | G | | exit/ |----------------->|
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| | | |------------------------>| | | | |
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| | | | | | | B | | | E | |
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| | | | | | |------>| |<-----------------|
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| | | | | | | | | | | |
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| | | | | | | D | | | | |
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| | | | | | |<------| | | | |
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| | | | | | | +--------------+ | | |
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| | +---------------+ | | +------------------------------+ | |
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| | | | | |
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| +-------------------------+ +--------------------------------------------+ |
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| |
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+---------------------------------------------------------------------------------------------+
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@@ -0,0 +1,41 @@
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package demo.showcase;
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import org.junit.After;
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import org.junit.Test;
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import org.springframework.context.annotation.AnnotationConfigApplicationContext;
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import org.springframework.statemachine.EnumStateMachine;
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import org.springframework.statemachine.StateMachine;
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import org.springframework.statemachine.StateMachineSystemConstants;
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import demo.CommonConfiguration;
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import demo.showcase.Application.Events;
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import demo.showcase.Application.States;
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public class ShowcaseTests {
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private AnnotationConfigApplicationContext context;
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@SuppressWarnings("resource")
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@Test
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public void testApplication() {
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AnnotationConfigApplicationContext context = new AnnotationConfigApplicationContext();
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context.register(CommonConfiguration.class, Application.class);
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context.refresh();
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@SuppressWarnings("unchecked")
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StateMachine<States,Events> machine = context.getBean(StateMachineSystemConstants.DEFAULT_ID_STATEMACHINE, EnumStateMachine.class);
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machine.start();
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machine.sendEvent(Events.A);
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}
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@After
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public void clean() {
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if (context != null) {
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context.close();
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context = null;
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}
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}
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}
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