src/test/java/org/apache/commons/scxml2/env/jexl/microwave-02.xml

<?xml version="1.0"?>
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 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
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 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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-->
<!--
   This document uses Commons JEXL as the expressions language.
-->
<scxml xmlns="http://www.w3.org/2005/07/scxml" version="1.0"
       xmlns:cs="https://commons.apache.org/scxml"
       datamodel="jexl"
       initial="microwave">

  <!--  trivial microwave oven example -->
  <!-- using parallel and In() predicate -->

  <parallel id="microwave">
    <state id="oven">
      <initial>
        <transition target="off"/>
      </initial>

      <state id="off">
        <!-- off state -->
        <transition event="turn_on" target="on"/>
      </state>
      
      <state id="on">
        <initial>
          <transition target="idle"/>
        </initial>

        <!-- on/pause state -->
        <onentry>
          <!-- we assume the cook_time is passed in as a context parameter -->
          <if cond="empty(cook_time)">
            <!-- default setting -->
            <cs:var name="cook_time" expr="5"/>
          </if>
          <!-- timer variable -->
          <cs:var name="timer" expr="0"/>
        </onentry>
        
        <transition event="turn_off" target="off"/>

        <transition cond="timer ge cook_time" target="off"/>
        
        <state id="idle">
          <transition cond="In('closed')" target="cooking"/>
        </state>
        
        <state id="cooking">
          <transition cond="not In('closed')" target="idle"/>

          <transition event="time" target="cooking">
            <assign location="timer" expr="timer + 1"/>
          </transition>
        </state>
      </state>
    </state>

    <state id="door">
      <initial>
        <transition target="closed"/>
      </initial>
      <state id="closed">
        <transition event="door_open" target="open"/>
      </state>
      <state id="open">
        <transition event="door_close" target="closed"/>
      </state>
    </state>
  </parallel>

</scxml>