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User's Manual: Building a Simple Database Test Plan</title>
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<h1 id="building">6. Building a Database Test Plan<a class="sectionlink" href="#building" title="Link to here">¶</a>
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</h1>
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<p>In this section, you will learn how to create a basic
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<a href="build-test-plan.html">Test Plan</a> to test a database server.
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You will create fifty users that send 2 SQL requests to the database server.
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Also, you will tell the users to run their tests 100 times. So, the total number
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of requests is (50 users) x (2 requests) x (repeat 100 times) = 10'000 JDBC requests.
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To construct the Test Plan, you will use the following elements:
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<a href="test_plan.html#thread_group">Thread Group</a>,
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<a href="../usermanual/component_reference.html#JDBC_Request">JDBC Request</a>, <a href="../usermanual/component_reference.html#Summary_Report">Summary Report</a>.</p>
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<div class="clear"></div>
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<div class="note">This example uses the MySQL database driver.
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To use this driver, its containing .jar file (ex. mysql-connector-java-X.X.X-bin.jar) must be copied to the JMeter
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<b>./lib</b> directory (see <a href="get-started.html#classpath">JMeter's Classpath</a>
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for more details).</div>
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<div class="clear"></div>
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</div>
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<div class="section">
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<h1 id="adding_users">6.1 Adding Users<a class="sectionlink" href="#adding_users" title="Link to here">¶</a>
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</h1>
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<p>The first step you want to do with every JMeter Test Plan is to add a
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<a href="test_plan.html#thread_group">Thread Group</a> element. The Thread Group
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tells JMeter the number of users you want to simulate, how often the users should
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send requests, and the how many requests they should send.</p>
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<p>Go ahead and add the ThreadGroup element by first selecting the Test Plan,
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clicking your right mouse button to get the <span class="code">Add</span> menu, and then select
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<span class="menuchoice"><span class="guimenuitem">Add</span> → <span class="guimenuitem">ThreadGroup</span></span>.</p>
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<p>You should now see the Thread Group element under Test Plan. If you do not
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see the element, then "expand" the Test Plan tree by clicking on the
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Test Plan element.</p>
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<p>Next, you need to modify the default properties. Select the Thread Group element
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in the tree, if you have not already selected it. You should now see the Thread
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Group Control Panel in the right section of the JMeter window (see Figure 6.1
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below)</p>
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<figure>
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<a href="../images/screenshots/jdbctest/threadgroup1.png"><img src="../images/screenshots/jdbctest/threadgroup1.png" width="" height="" alt="
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Figure 6.1. Thread Group with Default Values"></a>
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<figcaption>
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Figure 6.1. Thread Group with Default Values</figcaption>
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</figure>
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<p>Start by providing a more descriptive name for our Thread Group. In the name
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field, enter JDBC Users.</p>
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<div class="clear"></div>
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<div class="note">You will need a valid database, database table, and user-level access to that
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table. In the example shown here, the database is 'cloud' and the table name is
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'vm_instance'.</div>
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<div class="clear"></div>
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<p>Next, increase the number of users to 50.</p>
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<p>In the next field, the Ramp-Up Period, leave the value of 10
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seconds. This property tells JMeter how long to delay between starting each
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user. For example, if you enter a Ramp-Up Period of 10 seconds, JMeter will
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finish starting all of your users by the end of the 10 seconds. So, if we have
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50 users and a 10 second Ramp-Up Period, then the delay between starting users
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would be 200 milliseconds (10 seconds / 50 users = 0.2 user per second). If you set the
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value to 0, then JMeter will immediately start all of your users.</p>
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<p>Finally, enter a value of 100 in
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the Loop Count field. This property tells JMeter how many times to repeat your
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test. To have JMeter repeatedly run your Test Plan, select the Forever
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checkbox.</p>
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<div class="clear"></div>
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<div class="note">In most applications, you have to manually accept
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changes you make in a Control Panel. However, in JMeter, the Control Panel
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automatically accepts your changes as you make them. If you change the
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name of an element, the tree will be updated with the new text after you
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leave the Control Panel (for example, when selecting another tree element).</div>
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<div class="clear"></div>
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<p>See Figure 6.2 for the completed JDBC Users Thread Group.</p>
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<figure>
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<a href="../images/screenshots/jdbctest/threadgroup2.png"><img src="../images/screenshots/jdbctest/threadgroup2.png" width="" height="" alt="
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Figure 6.2. JDBC Users Thread Group"></a>
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<figcaption>
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Figure 6.2. JDBC Users Thread Group</figcaption>
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</figure>
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</div>
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<div class="section">
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<h1 id="adding_requests">6.2 Adding JDBC Requests<a class="sectionlink" href="#adding_requests" title="Link to here">¶</a>
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</h1>
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<p>Now that we have defined our users, it is time to define the tasks that they
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will be performing. In this section, you will specify the JDBC requests to
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perform.</p>
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<p>Begin by selecting the JDBC Users element. Click your right mouse button
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to get the <b>Add</b> menu, and then select <span class="menuchoice"><span class="guimenuitem">Add</span> → <span class="guimenuitem">Config Element</span> → <span class="guimenuitem">JDBC Connection Configuration</span></span>.
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Then, select this new element to view its Control Panel (see Figure 6.3).</p>
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<p>Set up the following fields (these assume we will be using a MySQL database called 'cloud'):</p>
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<ul>
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<li>Variable name (here: myDatabase) bound to pool. This needs to uniquely identify the configuration. It is used by the JDBC Sampler to identify the configuration to be used.</li>
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<li>Database URL: jdbc:mysql://ipOfTheServer:3306/cloud</li>
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<li>JDBC Driver class: com.mysql.jdbc.Driver</li>
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<li>Username: the username of database</li>
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<li>Password: password for the username</li>
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</ul>
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<p>The other fields on the screen can be left as the defaults.</p>
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<p>JMeter creates a database connection pool with the configuration settings as specified in the Control Panel.
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The pool is referred to in JDBC Requests in the 'Variable Name' field.
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Several different JDBC Configuration elements can be used, but they must have unique names.
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Every JDBC Request must refer to a JDBC Configuration pool.
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More than one JDBC Request can refer to the same pool.
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</p>
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<figure>
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<a href="../images/screenshots/jdbctest/jdbc-config.png"><img src="../images/screenshots/jdbctest/jdbc-config.png" width="" height="" alt="
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Figure 6.3. JDBC Configuration"></a>
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<figcaption>
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Figure 6.3. JDBC Configuration</figcaption>
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</figure>
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<p>Selecting the JDBC Users element again. Click your right mouse button
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to get the <b>Add</b> menu, and then select <span class="menuchoice"><span class="guimenuitem">Add</span> → <span class="guimenuitem">Sampler</span> → <span class="guimenuitem">JDBC Request</span></span>.
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Then, select this new element to view its Control Panel (see Figure 6.4).</p>
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<figure>
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<a href="../images/screenshots/jdbctest/JDBCRequest.png"><img src="../images/screenshots/jdbctest/JDBCRequest.png" width="" height="" alt="
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Figure 6.4. JDBC Request"></a>
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<figcaption>
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Figure 6.4. JDBC Request</figcaption>
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</figure>
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<p>In our Test Plan, we will make two JDBC requests. The first one is for
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select all 'Running' VM instances, and the second is to select 'Expunging' VM instance (obviously you should
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change these to examples appropriate for your particular database). These
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are illustrated below.</p>
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<div class="clear"></div>
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<div class="note">JMeter sends requests in the order that you add them to the tree.</div>
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<div class="clear"></div>
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<p>Start by editing the following properties (see Figure 6.5):
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<ul>
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<li>Change the Name to 'VM Running'.</li>
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<li>Enter the Pool Name: 'myDatabase' (same as in the configuration element)</li>
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<li>Enter the SQL Query String field.</li>
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<li>Enter the Parameter values field with 'Running' value.</li>
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<li>Enter the Parameter types with 'VARCHAR'.</li>
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</ul>
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</p>
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<figure>
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<a href="../images/screenshots/jdbctest/JDBCRequest2.png"><img src="../images/screenshots/jdbctest/JDBCRequest2.png" width="" height="" alt="
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Figure 6.5. JDBC Request for the first SQL request"></a>
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<figcaption>
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Figure 6.5. JDBC Request for the first SQL request</figcaption>
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</figure>
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<p>Next, add the second JDBC Request and edit the following properties (see
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Figure 6.6):
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<ul>
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<li>Change the Name to 'VM Expunging'.</li>
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<li>Change the value of Parameter values to 'Expunging'.</li>
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</ul>
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</p>
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<figure>
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<a href="../images/screenshots/jdbctest/JDBCRequest3.png"><img src="../images/screenshots/jdbctest/JDBCRequest3.png" width="" height="" alt="
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Figure 6.6. JDBC Request for the second request"></a>
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<figcaption>
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Figure 6.6. JDBC Request for the second request</figcaption>
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</figure>
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</div>
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<div class="section">
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<h1 id="adding_listener">6.3 Adding a Listener to View/Store the Test Results<a class="sectionlink" href="#adding_listener" title="Link to here">¶</a>
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</h1>
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<p>The final element you need to add to your Test Plan is a
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<a href="component_reference.html#listeners">Listener</a>. This element is
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responsible for storing all of the results of your JDBC requests in a file
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and presenting the results.</p>
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<p>Select the <i>JDBC Users</i> element and add a <a href="../usermanual/component_reference.html#Summary_Report">Summary Report</a>
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listener (<span class="menuchoice"><span class="guimenuitem">Add</span> → <span class="guimenuitem">Listener</span> → <span class="guimenuitem">Summary Report</span></span>).</p>
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<p>Save the test plan, and run the test with the menu
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<span class="menuchoice"><span class="guimenuitem">Run</span> → <span class="guimenuitem">Start</span></span> or
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<span class="keycombo"><span class="keysym">Ctrl</span> + <span class="keysym">R</span></span>
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</p>
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<p>The listener shows the results.</p>
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<figure>
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<a href="../images/screenshots/jdbctest/jdbc-results.png"><img src="../images/screenshots/jdbctest/jdbc-results.png" width="" height="" alt="
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Figure 6.7. Graph results Listener"></a>
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<figcaption>
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Figure 6.7. Graph results Listener</figcaption>
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</figure>
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</div>
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