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JMeter example source code file (

This example JMeter source code file ( is included in the "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - JMeter tags/keywords

abstractfunction, invalidvariableexception, jmetervariables, key, key, list, longsum, non-nls-1, non-nls-1, override, override, string, string, testplan, util

The JMeter source code

 * 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
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * See the License for the specific language governing permissions and
 * limitations under the License.

package org.apache.jmeter.functions;

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 longSum function that adds two or more long values.
 * @see IntSum
public class LongSum extends AbstractFunction {

    private static final List<String> desc = new LinkedList();

    private static final String KEY = "__longSum"; //$NON-NLS-1$

    static {
        desc.add(JMeterUtils.getResString("longsum_param_1")); //$NON-NLS-1$
        desc.add(JMeterUtils.getResString("longsum_param_2")); //$NON-NLS-1$
        desc.add(JMeterUtils.getResString("function_name_paropt")); //$NON-NLS-1$

    private Object[] values;

     * No-arg constructor.
    public LongSum() {

    /** {@inheritDoc} */
    public synchronized String execute(SampleResult previousResult, Sampler currentSampler)
            throws InvalidVariableException {

        JMeterVariables vars = getVariables();

        long sum = 0;
        String varName = ((CompoundVariable) values[values.length - 1]).execute().trim();

        for (int i = 0; i < values.length - 1; i++) {
            sum += Long.parseLong(((CompoundVariable) values[i]).execute());

        try {
            sum += Long.parseLong(varName);
            varName = null; // there is no variable name
        } catch (NumberFormatException ignored) {

        String totalString = Long.toString(sum);
        if (vars != null && varName != null && varName.length() > 0){// vars will be null on TestPlan
            vars.put(varName, totalString);

        return totalString;


    /** {@inheritDoc} */
    public synchronized void setParameters(Collection<CompoundVariable> parameters) throws InvalidVariableException {
        checkMinParameterCount(parameters, 2);
        values = parameters.toArray();

    /** {@inheritDoc} */
    public String getReferenceKey() {
        return KEY;

    /** {@inheritDoc} */
    public List<String> getArgumentDesc() {
        return desc;

Other JMeter examples (source code examples)

Here is a short list of links related to this JMeter source code file:

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