src/test/java/org/apache/commons/scxml2/history-parallel-01.xml

<?xml version="1.0"?>
<!--
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * 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
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
-->
<!--
   This document is an example of using history in parallel
-->
<scxml xmlns="http://www.w3.org/2005/07/scxml" version="1.0" datamodel="jexl"
        initial="off_call">

    <state id="off_call">
        <transition event="dial" target="call_active"/>
    </state>

    <parallel id="call_active">

        <state id="talk_status" initial="talking">
            <state id="talking">
                <transition event="hold"      target="held" />
            </state>
            <state id="held">
                <transition event="retrieve"  target="talking" />
            </state>
        </state>

        <state id="call_status" initial="on_call">
            <state id="on_call">
                <transition event="hangup"    target="off_call"/>
                <transition event="consult"   target="consult_active"/>
            </state>                
            <state id="on_call_consult">
                <transition event="hangup"    target="off_call"/>
                <transition event="alternate" target="resume_consult"/>
            </state>
        </state>

        <history id="resume_call" type="deep">
          <transition target="talk_status call_status"/>
        </history>

    </parallel>

    <parallel id="consult_active">

        <state id="consult_talk_status" initial="consult_talking">
            <state id="consult_talking">
                <transition event="hold"      target="consult_held" />
            </state>
            <state id="consult_held">
                <transition event="retrieve"  target="consult_talking" />
            </state>
        </state>

        <state id="consult_status" initial="on_consult">
            <state id="on_consult">
                <transition event="hangup"    target="resume_call"/>
                <transition event="alternate" target="resume_call"/>
            </state>
        </state>

        <history id="resume_consult" type="deep">
          <transition target="consult_talk_status consult_status"/>
        </history>

    </parallel>

</scxml>