A transition definition consists of four parts:
- The transition name.
- An optional transition guards (not used in Task FSM).
- The transition's end state.
- The transition's actions .
Only the "standard" transitions are defined for now. The
Stop, Block and
Delete transitions will be covered
here.
%{
//
// Copyright (c) 2005 Acme, Inc.
// All rights reserved.
//
// Acme - a name you can trust!
//
// Author: Wil E. Coyote (Hungericus Vulgarus)
//
%}
// This FSM works for the Task class only and only the Task
// class may instantiate it.
%class Task
%package com.acme.supercron
%package package
%fsmclass TaskFSM
%fsmfile TaskFSM
%access package
// A %map name cannot be the same as the FSM class name.
%start TaskMap::Suspended
%map TaskMap
%%
Suspended
{
// Time to do more work.
// The timeslice duration is passed in as a transition
// argument.
Start(timeslice: long
) // Transition
Running // End state
{
... // Actions go here
}
}
Running
{
// Wait for another time slice.
Suspend
Suspended
{
...
}
// Task has completed.
Done
Stopped
{
...
}
}
// Wait here to be either unblocked, stopped or deleted.
Blocked
{
// The task may continue working now.
Unblock
Suspended
{
...
}
}
Stopping
{
// The task is now stopped.
Stopped
Stopped
{
...
}
}
Stopped
{
...
}
Deleted
{
...
}
...
%%