EventBus 实现java状态机实例

发布时间：2023-02-20 11:04:21 所属栏目：Java 来源：互联网

导读：首先，了解状态机是什么，我们为什么需要状态机！举个最简单例子，请假，作为一个最底层程序员，每次请假都要领导层层审批，而假有分为很多种，事假，病假，婚假，年休假等等，当然选择请的假不同，审批标准也不同，不同的假单需要走的审批链也不一样，比如

　　        StatusHandlerRegistry.registryStatusHandler(LeavePermitType.ANNUAL_LEAVE,Status.leader_PERMIT_AGREE,new AnnualleaderAgreeStatusHandler());
　　        StatusHandlerRegistry.registryStatusHandler(LeavePermitType.ANNUAL_LEAVE,Status.leader_PERMIT_disAGREE,new AnnualleaderdisAgreeStatusHandler());
　　        StatusHandlerRegistry.registryStatusHandler(LeavePermitType.ANNUAL_LEAVE,Status.leader_PERMIT_MODIFY,new AnnualleaderPermitModifyStatusHandler());
　　        StatusHandlerRegistry.registryStatusHandler(LeavePermitType.ANNUAL_LEAVE,Status.leader_PERMITING,new AnnualleaderPermitingStatusHandler());
　　        StatusHandlerRegistry.registryStatusHandler(LeavePermitType.ANNUAL_LEAVE,Status.CEO_PERMIT_AGREE,new AnnualCEOAgreeStatusHandler());
　　        StatusHandlerRegistry.registryStatusHandler(LeavePermitType.ANNUAL_LEAVE,Status.CEO_PERMIT_disAGREE,new AnnualCEOdisAgreeStatusHandler());
　　        StatusHandlerRegistry.registryStatusHandler(LeavePermitType.ANNUAL_LEAVE,Status.CEO_PERMIT_MODIFY,new AnnualCEOPermitModifyStatusHandler());
　　        StatusHandlerRegistry.registryStatusHandler(LeavePermitType.ANNUAL_LEAVE,Status.CEO_PERMITING,new AnnualCEOPermitingStatusHandler());
　　        StatusHandlerRegistry.registryStatusHandler(LeavePermitType.ANNUAL_LEAVE,Status.PERMIT_SUCCESS,new AnnualPermitSuccessstatusHandler());
　　        StatusHandlerRegistry.registryStatusHandler(LeavePermitType.ANNUAL_LEAVE,Status.PERMIT_FAIL,new AnnualPermitFailStatusHandler());
　　    }
　　    public static void registryMedicalPermitStatusHandler() {
　　        StatusHandlerRegistry.registryStatusHandler(LeavePermitType.MEDICAL_LEAVE,new MedicalPermitSubmitStatusHandler());
　　        StatusHandlerRegistry.registryStatusHandler(LeavePermitType.MEDICAL_LEAVE,new MedicalleaderAgreeStatusHandler());
　　        StatusHandlerRegistry.registryStatusHandler(LeavePermitType.MEDICAL_LEAVE,new MedicalleaderdisAgreeStatusHandler
　　                ());
　　        StatusHandlerRegistry.registryStatusHandler(LeavePermitType.MEDICAL_LEAVE,new MedicalleaderPermitModifyStatusHandler());
　　        StatusHandlerRegistry.registryStatusHandler(LeavePermitType.MEDICAL_LEAVE,new MedicalleaderPermitingStatusHandler());
　　        StatusHandlerRegistry.registryStatusHandler(LeavePermitType.MEDICAL_LEAVE,Status.HR_PERMIT_AGREE,new MedicalHrAgreeStatusHandler());
　　        StatusHandlerRegistry.registryStatusHandler(LeavePermitType.MEDICAL_LEAVE,Status.HR_PERMIT_disAGREE,new MedicalHrdisAgreeStatusHandler());
　　        StatusHandlerRegistry.registryStatusHandler(LeavePermitType.MEDICAL_LEAVE,Status.HR_PERMIT_MODIFY,new MedicalHrPermitModifyStatusHandler());
　　        StatusHandlerRegistry.registryStatusHandler(LeavePermitType.MEDICAL_LEAVE,Status.HR_PERMITING,new MedicalHrPermitingStatusHandler());
　　        StatusHandlerRegistry.registryStatusHandler(LeavePermitType.MEDICAL_LEAVE,new MedicalPermitSuccessstatusHandler());
　　        StatusHandlerRegistry.registryStatusHandler(LeavePermitType.MEDICAL_LEAVE,new MedicalPermitFailStatusHandler());
　　    }

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