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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

hashmap, iterator, jmetervariables, jmetervariables, map, non-nls-1, non-nls-1, object, object, pre_load, set, string, string, 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.threads;

import java.util.Collections;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.Set;
import java.util.Map.Entry;

import org.apache.jmeter.util.JMeterUtils;

 * Class which defines JMeter variables.
 * These are similar to properties, but they are local to a single thread.
public class JMeterVariables {
    private final Map<String, Object> variables = new HashMap();

    private int iteration = 0;

    // Property names to preload into JMeter variables:
    private static final String [] PRE_LOAD = {
      "START.MS",     // $NON-NLS-1$
      "START.YMD",    // $NON-NLS-1$
      "START.HMS",    //$NON-NLS-1$
      "TESTSTART.MS", // $NON-NLS-1$

    public JMeterVariables() {

    private void preloadVariables(){
        for (int i = 0; i < PRE_LOAD.length; i++){
            String property=PRE_LOAD[i];
            String value=JMeterUtils.getProperty(property);
            if (value != null){

    public String getThreadName() {
        return Thread.currentThread().getName();

    public int getIteration() {
        return iteration;

    public void incIteration() {

    // Does not appear to be used
    public void initialize() {

    public Object remove(String key) {
        return variables.remove(key);

    public void put(String key, String value) {
        variables.put(key, value);

    public void putObject(String key, Object value) {
        variables.put(key, value);

    public void putAll(Map<String, ?> vars) {

    public void putAll(JMeterVariables vars) {

     * Returns null values if variable doesn't exist. Users of this must check
     * for null.
    public String get(String key) {
        return (String) variables.get(key);

    public Object getObject(String key) {
        return variables.get(key);

    public Iterator<Entry getIterator(){
        return Collections.unmodifiableMap(variables).entrySet().iterator() ;

    // Used by DebugSampler
    public Set<Entry entrySet(){
        return Collections.unmodifiableMap(variables).entrySet();

Other JMeter examples (source code examples)

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

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