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The source code// $Header: /home/cvs/jakarta-jmeter/src/functions/org/apache/jmeter/functions/Random.java,v 1.4.2.1 2004/05/20 15:23:12 mstover1 Exp $ /* * Copyright 2003-2004 The Apache Software Foundation. * * Licensed 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.threads.JMeterVariables; import org.apache.jmeter.util.JMeterUtils; /** * Provides a Random function which returns a random integer between * a min (first argument) and a max (seceond argument). * * @author Jonathan Kwadzo * @version $Id: Random.java,v 1.4.2.1 2004/05/20 15:23:12 mstover1 Exp $ */ public class Random extends AbstractFunction implements Serializable { private static final List desc = new LinkedList(); private static final String KEY = "__Random"; static { desc.add(JMeterUtils.getResString("minimum_param")); desc.add(JMeterUtils.getResString("maximum_param")); desc.add(JMeterUtils.getResString("function_name_param")); } private transient CompoundVariable varName, minimum, maximum; /** * No-arg constructor. */ public Random() { } /** * Clone this Add object. * * @return A new Add object. */ public Object clone() { Random newRandom = new Random(); return newRandom; } /** * Execute the function. * * @see Function#execute(SampleResult, Sampler) */ public synchronized String execute( SampleResult previousResult, Sampler currentSampler) throws InvalidVariableException { JMeterVariables vars = getVariables(); int min = Integer.parseInt(minimum.execute().trim()); int max = Integer.parseInt(maximum.execute().trim()); int rand = (int) Math.round(min + Math.random() * (max - min)); String randString = Integer.toString(rand); vars.put(varName.execute(), randString); return randString; } /** * Set the parameters for the function. * * @see Function#setParameters(Collection) */ public void setParameters(Collection parameters) throws InvalidVariableException { Object[] values = parameters.toArray(); if (values.length < 3) { throw new InvalidVariableException(); } else { varName = (CompoundVariable) values[2]; minimum = (CompoundVariable) values[0]; maximum = (CompoundVariable) values[1]; } } /** * Get the invocation key for this function. * * @see Function#getReferenceKey() */ public String getReferenceKey() { return KEY; } /** * Get the description of this function. * * @see Function#getArgumentDesc() */ public List getArgumentDesc() { return desc; } } |
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