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| <title>Using a Load Generator in NetBeans IDE</title> |
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| <meta name="description" content="An overview of how to use a JMeter load testing script in NetBeans IDE."> |
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| <h2>Using a Load Generator in NetBeans IDE</h2> |
| |
| <p>When testing the performance of an application, it can be beneficial to perform your tests |
| under a typical load. This can be difficult if you are running your application in a development |
| environment. One way to emulate an application running under load is through the use of a |
| load generator script. |
| This document presents an overview of load generator support offered by the IDE.</p> |
| <p>Instead of supplying its own load generator runtime, the IDE relies on integrating third party tools. |
| NetBeans IDE supports the Apache JMeter Load Testing Tool (<a href="http://jakarta.apache.org/jmeter">homepage</a>) |
| to replay load testing scripts. To use the JMeter tool in the IDE, you first need to download |
| the required plugins from the Update Center.</p> |
| |
| <div class="indent"> |
| |
| <h3 class="tutorial">Contents</h3> |
| <img src="../../../images_www/articles/73/netbeans-stamp-80-74-73.png" class="stamp" alt="Content on this page applies to NetBeans IDE 7.2, 7.3, 7.4 and 8.0" title="Content on this page applies to the NetBeans IDE 7.2, 7.3, 7.4 and 8.0" > |
| <ul> |
| <li><a href="#Exercise_1">Installing the JMeter Plugins</a></li> |
| <li><a href="#Exercise_2">Working with the JMeter Load Testing Script</a> |
| <ul> |
| <li><a href="#Exercise_2a">Creating a Load Testing Script</a></li> |
| <li><a href="#Exercise_2b">Editing a Load Testing Script</a></li> |
| <li><a href="#Exercise_2c">Starting a Load Testing Script</a></li> |
| <li><a href="#Exercise_2d">Stopping and Restarting a Load Testing Script</a></li> |
| </ul> |
| </li> |
| </ul> |
| </div> |
| |
| <h2>Getting Started</h2> |
| <div class="indent"> |
| <h3>Prerequisites</h3> |
| <p>This document assumes you have some basic knowledge of, or programming experience with, the following technologies:</p> |
| <ul> |
| <li>Java Programming</li> |
| <li>NetBeans IDE</li> |
| </ul> |
| |
| <h3>Software Needed for the Tutorial</h3> |
| <p>For this tutorial you need to have the following software installed on your computer:</p> |
| <table> |
| <tbody> |
| <tr> |
| <th class="tblheader" scope="col">Software or Resource</th> |
| <th class="tblheader" scope="col">Version Required</th> |
| </tr> |
| <tr> |
| <td class="tbltd1"><a href="https://netbeans.org/downloads/index.html">NetBeans IDE</a></td> |
| <td class="tbltd1">7.2, 7.3, 7.4, 8.0</td> |
| </tr> |
| <tr> |
| <td class="tbltd1"><a href="http://www.oracle.com/technetwork/java/javase/downloads/index.html">Java Development Kit (JDK)</a></td> |
| <td class="tbltd1">Version 7 or 8</td> |
| </tr> |
| |
| <tr> |
| <td class="tbltd1">JMeter Kit and Load Generator plugins</td> |
| <td class="tbltd1">download from NetBeans Update Center</td> |
| </tr> |
| <tr> |
| <td class="tbltd1">GlassFish application server</td> |
| <td class="tbltd1">3.x, 4.x</td> |
| </tr> |
| |
| </tbody> |
| </table> |
| <p class="notes"><strong>Notes.</strong></p> |
| <ul> |
| <li>The profiling tool is bundled with NetBeans IDE, and no special setup is necessary in order to begin profiling an application.</li> |
| <li>To add support for the JMeter Load Testing Tool, use the Plugins Manager to download the JMeter Kit and the Load Generator plugins from the Update Center.</li> |
| </ul> |
| </div> |
| <!-- ===================================================================================== --> |
| <a name="Exercise_1"></a> |
| <h2>Installing the JMeter Plugins</h2> |
| <p>You can easily add support for the JMeter load generator by downloading and installing the <b>JMeter Kit</b> and <b>Load Generator</b> |
| plugins from the NetBeans Update Center.</p> |
| <p>To download the plugins, do the following:</p> |
| <ol> |
| <li>Choose Tools > Plugins from the main menu to open the Plugins manager.</li> |
| <li>Click the Available Plugins tab and select the checkboxes for the JMeter Kit and Load Generator plugins. |
| Click Install.<br> |
| <img src="../../../images_www/articles/74/java/profile-loadgen/generator-plugin.png" |
| alt="screenshot of Plugins manager" title="Load Generator plugins in Plugins manager" class="margin-around b-all" /> |
| </li> |
| <li>Step through the installer to download and install the plugins and click Finish. |
| Click Close to close the Plugins Manager.</li> |
| </ol> |
| |
| <p>After installing the plugins, the category Load Testing Scripts is added to the New File wizard.</p> |
| |
| <a name="Exercise_2"></a> |
| <h2>Working with the JMeter Load Testing Script</h2> |
| <p>Support for the JMeter plugins is closely integrated with the IDE's profiling tool. |
| The JMeter plugins enable you to easily create and run JMeter load testing scripts from within the IDE.</p> |
| <p>To use a load generator script, you create a script for a specific project and modify the script according |
| to the type of project load that would be placed on a server running the application. |
| When you run the script, the script places a load on the server that emulates |
| the behavior of the application under typical running conditions. |
| You can then test the performance of the application and the test results you achieve |
| would more closely approximate the performance of the application under typical conditions.</p> |
| |
| <div class="indent"> |
| <a name="Exercise_2a"></a> |
| <h3>Creating a New Load Testing Script</h3> |
| <p>After you download and install the plugins, a new category is created in the New File wizard. |
| You use the New File wizard to create a load script file in your project.</p> |
| <p>To create a new load test script, do the following:</p> |
| <ol> |
| <li>Right-click the project node in the Projects window and choose New > Other.</li> |
| <li>In the Categories pane, expand Load Testing Scripts, select JMeter Plans and then select New JMeter Plan in the File Types pane. Click Next.</li> |
| <li>Type a name for the script and click Finish.</li> |
| </ol> |
| <p>When you create a new script, the IDE places the script under the Load Generator Scripts node in the Projects window. |
| In the Files window, you can see that the IDE saves the script in the <tt>jmeter</tt> directory. |
| If you already have a load testing script created outside of the IDE, you can create a |
| <tt>jmeter</tt> directory and add the script to the directory to run the script from within the IDE.</p> |
| |
| <img src="../../../images_www/articles/74/java/profile-loadgen/new-plan.png" |
| alt="Creating new JMeter load testing script" class="margin-around b-all" /> |
| |
| <a name="Exercise_2b"></a> |
| <h3>Editing a Load Testing Script</h3> |
| <p>The JMeter external editor enables you to modify the script according to the needs of your application. |
| After you have created a load testing script or added a script to your project, |
| you can invoke the external editor by right-clicking the script in the Projects window and choosing <b>External Edit</b>.</p> |
| <p>For more information about editing the JMeter testing scripts, see the <a href="http://jakarta.apache.org/jmeter/usermanual/index.html">JMeter User Manual</a>.</p> |
| <img src="../../../images_www/articles/74/java/profile-loadgen/jmeter-externaledit.png" |
| alt="JMeter load testing script in project structure" title="JMeter load testing script in project structure" class="margin-around b-all" /> |
| |
| |
| <a name="Exercise_2c"></a> |
| <h3>Starting a Load Testing Script</h3> |
| <p>The load testing script can be started in the following ways:</p> |
| <ul> |
| <li> |
| <b>In standalone mode</b> |
| <p>In the <b>Services</b> window, right-click the Load Generators node and choose <b>JMeter > Start</b>. |
| This action will bring up a browse dialog where you can specify the script to run.</p> |
| <img src="../../../images_www/articles/74/java/profile-loadgen/jmeter-services.png" |
| alt="Load Generators in the Runtime Tab" class="margin-around b-all" /> |
| </li> |
| <li> |
| <b>From the Select Profiling Task window</b> |
| <p>When profiling a web application you can specify a load testing script to be run in the Select Profiling Task window. |
| The selected script will be started right before the browser window opens.</p> |
| <img src="../../../images_www/articles/74/java/profile-loadgen/jmeter-profilewindow72.png" |
| alt="Start load generator script from Select Task Panel" class="margin-around b-all" /> |
| </li> |
| </ul> |
| |
| <a name="Exercise_2d"></a> |
| <h3>Stopping and Restarting a Load Testing Script</h3> |
| <p>You can stop and restart a load testing script from either the |
| <b>Output window</b> or the <b>Services window</b>.</p> |
| <p>A JMeter tab opens in the <b>Output window</b> after the script has been loaded. |
| The window displays the current state of the load generator. |
| In the left margin of the Output window there are controls to start, stop or restart the script.</p> |
| <img src="../../../images_www/articles/74/java/profile-loadgen/jmeter-output.png" |
| alt="Load Generator Output Window - Running" title="Output window showing Load Generator status" class="margin-around b-all" /> |
| <p>The current status of the load generator is also displayed in the <b>Services window</b>. |
| You can stop and restart a script by selecting a node under the JMeter node and choosing an |
| item from the popup menu.</p> |
| <img src="../../../images_www/articles/74/java/profile-loadgen/jmeter-services2.png" |
| alt="Services window - Load Generator Running" title="Services window showing status of Load Generator" class="margin-around b-all" /> |
| |
| |
| </div> |
| |
| |
| <br> |
| |
| <br style="clear:both;"> |
| <a name="Exercise_3"></a> |
| <h2>Additional Resources</h2> |
| <p>This basic overview shows how to use a JMeter load testing script from within the IDE. |
| For information on developing a load testing script for your application, see the following resources:</p> |
| <ul> |
| <li><a href="http://jakarta.apache.org/jmeter">Apache JMeter Load Testing Tool</a></li> |
| <li><a href="http://jakarta.apache.org/jmeter/usermanual/index.html">JMeter User Manual</a></li> |
| </ul> |
| |
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| <a href="/about/contact_form.html?to=3&subject=Feedback:%20Using%20a%20Load%20Generator">Send Feedback on This Tutorial</a> |
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| |
| <h2>See Also</h2> |
| <ul> |
| <li><a href="../web/quickstart-webapps.html">Introduction to Developing Web Applications</a></li> |
| <li><a href="profiler-intro.html">Introduction to Profiling Java Applications</a></li> |
| <li><a href="../../trails/java-ee.html">Java EE & Java Web Learning Trail</a></li> |
| </ul> |
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