State Machine
A state machine write in Java using states, transitions and conditions. This code was inspired by the following answer in Stack OverFlow: http://stackoverflow.com/a/2064170/2387977.
Build
Just:
gradle build
Run
The repository have two tests:
-
The StateMachineTest has the example from Stack OverFlow.
-
The StateMachineAccountTest is a state machine using the same mechanism, but using an entreprise example for an Account state machine.
The example below is a user account state diagram represented by the code in StateMachineAccountTest class. This diagram can be visualized here too.
+----------+
| |
+---------------------+ new | [isAccountDourmant()] suspend/
| | +-----------------------------------------+
| +---+------+ |
| | |
| [isVerified() | |
| isUniqueId()] | |
| activate/ | |
| | |
| +---v------+ [isSuspendedRequested()] suspend/ +-----v-----+
| | +-----------------------------------> |
| | | [isPasswordAlert()] lock/ | |
| | +-----------------------------------> |
|[isCancelRequested()]| | [isAccountDormant()] suspend/ | |
|cancel/ | Active +-----------------------------------> Suspended |
| | | | |
| | | [isResumeRequested()] resume/| |
| | <-----------------------------------+ |
| | | [isLockExpired()] unlock/| |
| | <-----------------------------------+ |
| +-+------+-+ +--+------+-+
| | | | |
| [isCancelRequested()] | | [isPolicyViolated()] | |
| cancel/ | | cancel/ | |
| | | | |
| | | | |
| | | | |
| | | | |
| +-v------v-+ | |
| | | | |
| | | [isCancelRequested()] cancel/ | |
| | <--------------------------------------+ |
| | Closed | |
+---------------------> | |
| | [isPolicyViolated()] cancel/ |
| <---------------------------------------------+
| |
+----------+