Author: sebb
Date: Fri Mar 2 07:26:11 2007
New Revision: 513807
URL: http://svn.apache.org/viewvc?view=rev&rev=513807
Log:
Added __V variable function to resolve nested variable names
[Forgot to add new file last time; added example]
Added:
jakarta/jmeter/branches/rel-2-2/src/functions/org/apache/jmeter/functions/Variable.java
Modified:
jakarta/jmeter/branches/rel-2-2/xdocs/usermanual/functions.xml
Added:
jakarta/jmeter/branches/rel-2-2/src/functions/org/apache/jmeter/functions/Variable.java
URL:
http://svn.apache.org/viewvc/jakarta/jmeter/branches/rel-2-2/src/functions/org/apache/jmeter/functions/Variable.java?view=auto&rev=513807
==============================================================================
---
jakarta/jmeter/branches/rel-2-2/src/functions/org/apache/jmeter/functions/Variable.java
(added)
+++
jakarta/jmeter/branches/rel-2-2/src/functions/org/apache/jmeter/functions/Variable.java
Fri Mar 2 07:26:11 2007
@@ -0,0 +1,93 @@
+/*
+ * 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.jmeter.functions;
+
+import java.io.Serializable;
+import java.util.Collection;
+import java.util.LinkedList;
+import java.util.List;
+
+import org.apache.jmeter.engine.util.CompoundVariable;
+import org.apache.jmeter.samplers.SampleResult;
+import org.apache.jmeter.samplers.Sampler;
+import org.apache.jmeter.util.JMeterUtils;
+
+/**
+ * Function to get a JMeter Variable
+ *
+ * Parameters:
+ * - variable name
+ *
+ * Returns:
+ * - the variable value, but if not found
+ * - the variable name itself
+ *
+ * @version $Revision: 493781 $ Updated: $Date: 2007-01-07 17:52:05 +0000
(Sun, 07 Jan 2007) $
+ */
+public class Variable extends AbstractFunction implements Serializable {
+
+ private static final List desc = new LinkedList();
+
+ private static final String KEY = "__V";
+
+ // Number of parameters expected - used to reject invalid calls
+ private static final int MIN_PARAMETER_COUNT = 1;
+ private static final int MAX_PARAMETER_COUNT = 1;
+
+ static {
+ desc.add(JMeterUtils.getResString("variable_name_param"));
+ }
+
+ private Object[] values;
+
+ public Variable() {
+ }
+
+ public Object clone() {
+ return new Variable();
+ }
+
+ public synchronized String execute(SampleResult previousResult, Sampler
currentSampler)
+ throws InvalidVariableException {
+ String variableName = ((CompoundVariable) values[0]).execute();
+ String variableValue = getVariables().get(variableName);
+ return variableValue == null? variableName : variableValue;
+
+ }
+
+ public void setParameters(Collection parameters) throws
InvalidVariableException {
+
+ values = parameters.toArray();
+
+ if ((values.length < MIN_PARAMETER_COUNT) || (values.length >
MAX_PARAMETER_COUNT)) {
+ throw new InvalidVariableException("Parameter Count not
between " + MIN_PARAMETER_COUNT + " & "
+ + MAX_PARAMETER_COUNT);
+ }
+
+ }
+
+ public String getReferenceKey() {
+ return KEY;
+ }
+
+ public List getArgumentDesc() {
+ return desc;
+ }
+
+}
\ No newline at end of file
Modified: jakarta/jmeter/branches/rel-2-2/xdocs/usermanual/functions.xml
URL:
http://svn.apache.org/viewvc/jakarta/jmeter/branches/rel-2-2/xdocs/usermanual/functions.xml?view=diff&rev=513807&r1=513806&r2=513807
==============================================================================
--- jakarta/jmeter/branches/rel-2-2/xdocs/usermanual/functions.xml (original)
+++ jakarta/jmeter/branches/rel-2-2/xdocs/usermanual/functions.xml Fri Mar 2
07:26:11 2007
@@ -703,7 +703,14 @@
<component index="§-num;.5.19" name="__V">
<description>
<p>The V (variable) function returns the result of evaluating a
variable name expression.
+ This can be used to evaluate nested variable references (which are not
currently supported).
</p>
+ <p>For example, if one has variables A1,A2 and N=1:</p>
+ <ul>
+ <li>${A1} - works OK</li>
+ <li>${A${N}} - does not work (nested variable reference)</li>
+ <li>${__V(A${N})} - works OK. A${N} becomes A1, and the __V function
returns the value of A1</li>
+ </ul>
</description>
<properties>
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