Author: ate
Date: Fri Jan 17 15:29:34 2014
New Revision: 1559151
URL: http://svn.apache.org/r1559151
Log:
SCXML-186: Groovy Expression evaluator support
- Simple test to validate and demonstrate using Groovy closures *is* possible
although not recommended to be used.
Using Groovy closures for SCXML is strongly discouraged because of the
limitations
(like NOT serializable) and serious memory/performance overhead they may
cause.
Better use the initial script feature as an script base and def(ine) methods
which provides same/similar capabilities
without the costs of closures. As an example, see:
serializable-initial-base-script.xml
Added:
commons/proper/scxml/trunk/src/test/java/org/apache/commons/scxml2/env/groovy/GroovyClosureTest.java
(with props)
commons/proper/scxml/trunk/src/test/java/org/apache/commons/scxml2/env/groovy/groovy-closure.xml
(with props)
Added:
commons/proper/scxml/trunk/src/test/java/org/apache/commons/scxml2/env/groovy/GroovyClosureTest.java
URL:
http://svn.apache.org/viewvc/commons/proper/scxml/trunk/src/test/java/org/apache/commons/scxml2/env/groovy/GroovyClosureTest.java?rev=1559151&view=auto
==============================================================================
---
commons/proper/scxml/trunk/src/test/java/org/apache/commons/scxml2/env/groovy/GroovyClosureTest.java
(added)
+++
commons/proper/scxml/trunk/src/test/java/org/apache/commons/scxml2/env/groovy/GroovyClosureTest.java
Fri Jan 17 15:29:34 2014
@@ -0,0 +1,44 @@
+/*
+ * 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.
+ */
+package org.apache.commons.scxml2.env.groovy;
+
+import java.net.URL;
+import java.util.Set;
+
+import org.apache.commons.scxml2.SCXMLExecutor;
+import org.apache.commons.scxml2.SCXMLTestHelper;
+import org.apache.commons.scxml2.model.SCXML;
+import org.apache.commons.scxml2.model.State;
+import org.apache.commons.scxml2.model.TransitionTarget;
+import org.junit.Assert;
+import org.junit.Test;
+
+public class GroovyClosureTest {
+
+ @Test
+ public void testGroovyClosure() throws Exception {
+ URL groovyClosure =
this.getClass().getClassLoader().getResource("org/apache/commons/scxml2/env/groovy/groovy-closure.xml");
+ SCXML scxml = SCXMLTestHelper.parse(groovyClosure);
+ Assert.assertNotNull(scxml);
+ SCXMLExecutor exec = SCXMLTestHelper.getExecutor(scxml, new
GroovyContext(), new GroovyEvaluator(true));
+ Assert.assertNotNull(exec);
+ Set<TransitionTarget> currentStates = SCXMLTestHelper.fireEvent(exec,
"turn_on");
+ Assert.assertEquals(2, currentStates.size());
+ String id = ((State)currentStates.iterator().next()).getId();
+ Assert.assertTrue(id.equals("closed") || id.equals("cooking"));
+ }
+}
Propchange:
commons/proper/scxml/trunk/src/test/java/org/apache/commons/scxml2/env/groovy/GroovyClosureTest.java
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Added:
commons/proper/scxml/trunk/src/test/java/org/apache/commons/scxml2/env/groovy/groovy-closure.xml
URL:
http://svn.apache.org/viewvc/commons/proper/scxml/trunk/src/test/java/org/apache/commons/scxml2/env/groovy/groovy-closure.xml?rev=1559151&view=auto
==============================================================================
---
commons/proper/scxml/trunk/src/test/java/org/apache/commons/scxml2/env/groovy/groovy-closure.xml
(added)
+++
commons/proper/scxml/trunk/src/test/java/org/apache/commons/scxml2/env/groovy/groovy-closure.xml
Fri Jan 17 15:29:34 2014
@@ -0,0 +1,109 @@
+<?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 uses Groovy as the expressions language.
+-->
+<scxml xmlns="http://www.w3.org/2005/07/scxml";
+ xmlns:cs="http://commons.apache.org/scxml";
+ version="1.0"
+ initial="microwave">
+
+ <!-- Trivial microwave oven example using a Groovy closure defined within a
script.
+ The closure is bind to the initial script context and thereby available
in all sub contexts as well.
+
+ This example is *only* to test and demonstrate it 'works'.
+ However, using Groovy closures for SCXML is strongly discouraged
because of the limitations
+ (like NOT serializable) and serious memory/performance overhead they
may cause.
+
+ Better use the initial script as script base and def(ine) methods which
provides same/similar capabilities
+ without the costs of closures. As an example, see:
serializable-initial-base-script.xml
+ -->
+ <script>
+ // simple boolean closure
+ cookingDone = { ctx -> ctx.timer ge ctx.cook_time }
+ </script>
+
+ <state id="microwave">
+
+ <initial>
+ <transition target="parts"/>
+ </initial>
+
+ <parallel id="parts">
+
+ <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="!var('cook_time')">
+ <!-- default setting, note namespace of this custom action -->
+ <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="cookingDone(binding)" target="off"/>
+
+ <state id="idle">
+ <transition cond="In('closed')" target="cooking"/>
+ </state>
+
+ <state id="cooking">
+ <transition cond="!In('closed')" target="idle"/>
+
+ <transition event="time" target="cooking">
+ <assign name="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>
+
+ </state>
+
+</scxml>
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