Spring State Machine Transitions

我试图从其他触发器转换到自动状态机（SM），但它不工作：初始操作（findCustomer（））应该改变SM的初始状态，然后每个操作触发事件等等到最终状态。这里是我的配置：Spring State Machine Transitions

@Configuration @EnableStateMachine public class CardStateMachineConfig extends EnumStateMachineConfigurerAdapter<CardStates, CardEvents> { 


    final private static Logger logger = LoggerFactory.getLogger(CardStateMachineConfig.class); 

    @Override 
    public void configure(StateMachineStateConfigurer<CardStates, CardEvents> states) throws Exception { 
     states.withStates().initial(CardStates.ACTIVE_STATUS).state(CardStates.ACTIVE_STATUS, findCustomer(), null) 
       .states(EnumSet.allOf(CardStates.class)); 

    } 

    // @formatter:off 
    @Override 
    public void configure(StateMachineTransitionConfigurer<CardStates, CardEvents> transitions) throws Exception { 




     transitions.withExternal().source(CardStates.ACTIVE_STATUS).target(CardStates.CUSTOMER_FOUND).event(CardEvents.FIND_CUSTOMER).action(findCustomer()) 
       .and().withExternal() 
     .source(CardStates.CUSTOMER_FOUND).target(CardStates.MOBILECARD_FOUND).event(CardEvents.CUSTOMER_FOUND).action(findMobileCard()) 
       .and().withExternal() 
     .source(CardStates.FIND_MOBILECARD_FOUND).target(CardStates.WIRECARD_LOCKED_CARD).event(CardEvents.MOBILE_CARD_FOUND).action(wirecardLockCard()); 


    } 

    // @formatter:on 
    @Override public void configure(StateMachineConfigurationConfigurer<CardStates, CardEvents> config) 
      throws Exception { 
     config.withConfiguration().autoStartup(true).listener(new MobileCardBlockProcessEventHandler()); 
    } 

    @Bean public Action<CardStates, CardEvents> findCustomer() { 

     return (context) -> { 
      context.getStateMachine().sendEvent(CardEvents.CUSTOMER_FOUND); 
     }; 

    } 

    @Bean public Action<CardStates, CardEvents> findMobileCard() { 

     return (context) -> { 
      context.getStateMachine().sendEvent(CardEvents.MOBILE_CARD_FOUND); 
     }; 
    } 
}

来源

2017-05-15 Mohamed Moez MANSOURI

出了什么问题？请提供[最小，完整且可验证的示例]（https://stackoverflow.com/help/mcve）。 – Obenland

1- SM使用初始状态CardStates.ACTIVE_STATUS实例化，但不触发findCustomer（）操作。所以没有任何反应：SM不会进化。 2-当我通过使用来自测试类的cardStateMachine.sendEvent（CardEvents.FIND_CUSTOMER）来触发事件CardEvents.FIND_CUSTOMER时，调用findCustomer（）动作+ SM状态更改，但是context.getStateMachine（）。sendEvent（CardEvents。 CUSTOMER_FOUND）;没有考虑到：它应该调用findMobileCard（）动作，如其转换中定义的那样。 –

你有事件CardEvents.FIND_CUSTOMER为CardStates.ACTIVE_STATUS到CardStates.CUSTOMER_FOUND。您从findCustomer()发送与CardEvents.FIND_CUSTOMER不同的事件CardEvents.CUSTOMER_FOUND。

改变这一点，我认为它应该工作。想到，我个人更倾向于通过匿名转换和选择状态来驱动automatic机器。

来源

2017-05-16 08:35:51

Spring State Machine Transitions

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