Package com.alibaba.cola.statemachine.impl

Class StateMachineImpl<S,E,C>

java.lang.Object

com.alibaba.cola.statemachine.impl.StateMachineImpl<S,E,C>

All Implemented Interfaces:

StateMachine<S,E,C>, Visitable

public class StateMachineImpl<S,E,C>
extends Object
implements StateMachine<S,E,C>

For performance consideration, The state machine is made "stateless" on purpose. Once it's built, it can be shared by multi-thread

One side effect is since the state machine is stateless, we can not get current state from State Machine.

Author:

Frank Zhang

Constructor Summary

Constructors

Constructor	Description
StateMachineImpl(Map<S,State<S,E,C>> stateMap)

Method Summary

Modifier and Type	Method	Description
String	accept(Visitor visitor)
S	fireEvent(S sourceStateId, E event, C ctx)	Send an event E to the state machine.
String	generatePlantUML()
String	getMachineId()	MachineId is the identifier for a State Machine
void	setMachineId(String machineId)
void	setReady(boolean ready)
void	showStateMachine()	Use visitor pattern to display the structure of the state machine

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

StateMachineImpl

public StateMachineImpl(Map<S,State<S,E,C>> stateMap)

Method Detail

fireEvent

public S fireEvent(S sourceStateId,
                   E event,
                   C ctx)

Description copied from interface: StateMachine

Send an event E to the state machine.

Specified by:

fireEvent in interface StateMachine<S,E,C>

Parameters:

sourceStateId - the source state

event - the event to send

ctx - the user defined context

Returns:

the target state

accept

public String accept(Visitor visitor)

Specified by:

accept in interface Visitable

showStateMachine

public void showStateMachine()

Description copied from interface: StateMachine

Use visitor pattern to display the structure of the state machine

Specified by:

showStateMachine in interface StateMachine<S,E,C>

generatePlantUML

public String generatePlantUML()

Specified by:

generatePlantUML in interface StateMachine<S,E,C>

getMachineId

public String getMachineId()

Description copied from interface: StateMachine

MachineId is the identifier for a State Machine

Specified by:

getMachineId in interface StateMachine<S,E,C>

Returns:

setMachineId

public void setMachineId(String machineId)

setReady

public void setReady(boolean ready)