上次聊了java状态机框架选型，最后采用stateless4j。这次继续聊下stateless4j使用的坑。
stateless4j的demo参照往期文章：
问题
调研的时候使用的代码是从 https://github.com/oxo42/stateless4j 下载。然后写了test case，简单验证业务逻辑，没毛病。 这时候在正式项目中引用stateless4j
<dependency>
<groupId>com.github.oxo42</groupId>
<artifactId>stateless4j</artifactId>
<version>2.5.0</version>
</dependency>
结果idea报错方法找不到：permitIf(T trigger, S destinationState, FuncBoolean guard, Action action)
master代码
/**
* Accept the specified trigger and transition to the destination state if guard is true
* <p>
* Additionally a given action is performed when transitioning. This action will be called after
* the onExit action of the current state and before the onEntry action of
* the destination state.
*
* @param trigger The accepted trigger
* @param destinationState The state that the trigger will cause a transition to
* @param guard Function that must return true in order for the trigger to be accepted
* @param action The action to be performed "during" transition
* @return The receiver
*/
public StateConfiguration<S, T> permitIf(T trigger, S destinationState, FuncBoolean guard, Action action) {
enforceNotIdentityTransition(destinationState);
return publicPermitIf(trigger, destinationState, guard, action);
}
对比maven repo v2.5.0的代码，只有这个方法
/**
* Accept the specified trigger and transition to the destination state
*
* @param trigger The accepted trigger
* @param destinationState The state that the trigger will cause a transition to
* @param guard Function that must return true in order for the trigger to be accepted
* @return The reciever
*/
public StateConfiguration<S, T> permitIf(T trigger, S destinationState, FuncBoolean guard) {
enforceNotIdentityTransition(destinationState);
return publicPermitIf(trigger, destinationState, guard);
}
解决
在stateless4j repo拉下master分支，重新打包2.5.1，放到内部仓库。