A State Machine implementation in Java

Simple State Machine with transitions, guards, actions.

...but without composite state, sub-state machine, deferred signals, event queues...

Define the State Machine by subclassing State Machine and using the builders in the constructor. Se tests for usage.

    State onHold = state(ON_HOLD)
            .transition(HURL_PHONE).guardedBy(event -> PHONE_HURLED_AGAINST_WALL.equals(event.getName()))
            .to(phoneDestroyed)
            .transition(HANG_UP).guardedBy(event -> HUNG_UP.equals(event.getName()))
            .to(offHook)
            .transition(TAKE_OFF_HOLD).onTransition(stopMuzak).guardedBy(event -> TOOK_OFF_HOLD.equals(event.getName()))
            .to(connected)
            .build();

State Machine used in the unit tests

Phone State Machine Diagram

Inspired by simplestatemachine

Phone State Machine
Generated from code by Graphviz using toDot() in StateMachine

dot -Tjpg -o <filename of image> <file with dot format>

Bintray upload

gradlew -PbintrayApiKey=<api key> bintrayUpload