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<div class="subTitle">org.apache.jmeter.visualizers.backend</div>
<h2 title="Class BackendListenerContext" class="title">Class BackendListenerContext</h2>
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<pre>public class <span class="typeNameLabel">BackendListenerContext</span>
extends <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a></pre>
<div class="block">BackendListenerContext is used to provide context information to a
BackendListenerClient implementation. This currently consists of the
initialization parameters which were specified in the GUI.
<p>
All of the methods in this class are currently read-only. If update methods
are included in the future, they should be defined so that a single instance
of <a href="../../../../../org/apache/jmeter/visualizers/backend/BackendListenerContext.html" title="class in org.apache.jmeter.visualizers.backend"><code>BackendListenerContext</code></a> can be associated with each thread.
Therefore, no synchronization should be needed. The same instance should
be used for all calls to setupTest, runTest, and teardownTest.</div>
<dl>
<dt><span class="simpleTagLabel">Since:</span></dt>
<dd>2.13</dd>
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<th class="colOne" scope="col">Constructor and Description</th>
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<td class="colOne"><code><span class="memberNameLink"><a href="../../../../../org/apache/jmeter/visualizers/backend/BackendListenerContext.html#BackendListenerContext-org.apache.jmeter.config.Arguments-">BackendListenerContext</a></span>(<a href="../../../../../org/apache/jmeter/config/Arguments.html" title="class in org.apache.jmeter.config">Arguments</a>&nbsp;args)</code>&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colOne"><code><span class="memberNameLink"><a href="../../../../../org/apache/jmeter/visualizers/backend/BackendListenerContext.html#BackendListenerContext-java.util.Map-">BackendListenerContext</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.html?is-external=true" title="class or interface in java.util">Map</a>&lt;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>,<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&gt;&nbsp;params)</code>&nbsp;</td>
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<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colLast" scope="col">Method and Description</th>
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<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/jmeter/visualizers/backend/BackendListenerContext.html#containsParameter-java.lang.String-">containsParameter</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;name)</code>
<div class="block">Determine whether or not a value has been specified for the parameter
with this name.</div>
</td>
</tr>
<tr id="i1" class="rowColor">
<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/jmeter/visualizers/backend/BackendListenerContext.html#getBooleanParameter-java.lang.String-boolean-">getBooleanParameter</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;name,
boolean&nbsp;defaultValue)</code>&nbsp;</td>
</tr>
<tr id="i2" class="altColor">
<td class="colFirst"><code>int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/jmeter/visualizers/backend/BackendListenerContext.html#getIntParameter-java.lang.String-">getIntParameter</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;name)</code>
<div class="block">Get the value of a specified parameter as an integer.</div>
</td>
</tr>
<tr id="i3" class="rowColor">
<td class="colFirst"><code>int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/jmeter/visualizers/backend/BackendListenerContext.html#getIntParameter-java.lang.String-int-">getIntParameter</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;name,
int&nbsp;defaultValue)</code>
<div class="block">Get the value of a specified parameter as an integer, or return the
specified default value if the value was not specified or is not an
integer.</div>
</td>
</tr>
<tr id="i4" class="altColor">
<td class="colFirst"><code>long</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/jmeter/visualizers/backend/BackendListenerContext.html#getLongParameter-java.lang.String-">getLongParameter</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;name)</code>
<div class="block">Get the value of a specified parameter as a long.</div>
</td>
</tr>
<tr id="i5" class="rowColor">
<td class="colFirst"><code>long</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/jmeter/visualizers/backend/BackendListenerContext.html#getLongParameter-java.lang.String-long-">getLongParameter</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;name,
long&nbsp;defaultValue)</code>
<div class="block">Get the value of a specified parameter as along, or return the specified
default value if the value was not specified or is not a long.</div>
</td>
</tr>
<tr id="i6" class="altColor">
<td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/jmeter/visualizers/backend/BackendListenerContext.html#getParameter-java.lang.String-">getParameter</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;name)</code>
<div class="block">Get the value of a specific parameter as a String, or null if the value
was not specified.</div>
</td>
</tr>
<tr id="i7" class="rowColor">
<td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/jmeter/visualizers/backend/BackendListenerContext.html#getParameter-java.lang.String-java.lang.String-">getParameter</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;name,
<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;defaultValue)</code>
<div class="block">Get the value of a specified parameter as a String, or return the
specified default value if the value was not specified.</div>
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<td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/Iterator.html?is-external=true" title="class or interface in java.util">Iterator</a>&lt;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/jmeter/visualizers/backend/BackendListenerContext.html#getParameterNamesIterator--">getParameterNamesIterator</a></span>()</code>
<div class="block">Get an iterator of the parameter names.</div>
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<h4>BackendListenerContext</h4>
<pre>public&nbsp;BackendListenerContext(<a href="../../../../../org/apache/jmeter/config/Arguments.html" title="class in org.apache.jmeter.config">Arguments</a>&nbsp;args)</pre>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>args</code> - the initialization parameters.</dd>
</dl>
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<pre>public&nbsp;BackendListenerContext(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.html?is-external=true" title="class or interface in java.util">Map</a>&lt;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>,<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&gt;&nbsp;params)</pre>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>params</code> - the initialization parameters.</dd>
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<h4>containsParameter</h4>
<pre>public&nbsp;boolean&nbsp;containsParameter(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;name)</pre>
<div class="block">Determine whether or not a value has been specified for the parameter
with this name.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>name</code> - the name of the parameter to test</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>true if the parameter value has been specified, false otherwise.</dd>
</dl>
</li>
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<h4>getParameterNamesIterator</h4>
<pre>public&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Iterator.html?is-external=true" title="class or interface in java.util">Iterator</a>&lt;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&gt;&nbsp;getParameterNamesIterator()</pre>
<div class="block">Get an iterator of the parameter names.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>an Iterator of Strings of the names of the parameters which
have been specified for this test.</dd>
</dl>
</li>
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<h4>getParameter</h4>
<pre>public&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;getParameter(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;name)</pre>
<div class="block">Get the value of a specific parameter as a String, or null if the value
was not specified.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>name</code> - the name of the parameter whose value should be retrieved</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the value of the parameter, or null if the value was not specified</dd>
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<pre>public&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;getParameter(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;name,
<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;defaultValue)</pre>
<div class="block">Get the value of a specified parameter as a String, or return the
specified default value if the value was not specified.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>name</code> - the name of the parameter whose value should be retrieved</dd>
<dd><code>defaultValue</code> - the default value to return if the value of this parameter was
not specified</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the value of the parameter, or the default value if the parameter
was not specified</dd>
</dl>
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<pre>public&nbsp;int&nbsp;getIntParameter(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;name)</pre>
<div class="block">Get the value of a specified parameter as an integer. An exception will
be thrown if the parameter is not specified or if it is not an integer.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>name</code> - the name of the parameter whose value should be retrieved</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the value of the parameter</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/IllegalArgumentException.html?is-external=true" title="class or interface in java.lang">IllegalArgumentException</a></code> - if no value defined</dd>
<dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/NumberFormatException.html?is-external=true" title="class or interface in java.lang">NumberFormatException</a></code> - if the parameter is not specified or is not an integer</dd>
<dt><span class="seeLabel">See Also:</span></dt>
<dd><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Integer.html?is-external=true#parseInt-java.lang.String-" title="class or interface in java.lang"><code>Integer.parseInt(String)</code></a></dd>
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<pre>public&nbsp;int&nbsp;getIntParameter(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;name,
int&nbsp;defaultValue)</pre>
<div class="block">Get the value of a specified parameter as an integer, or return the
specified default value if the value was not specified or is not an
integer. A warning will be logged if the value is not an integer.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>name</code> - the name of the parameter whose value should be retrieved</dd>
<dd><code>defaultValue</code> - the default value to return if the value of this parameter was
not specified</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the value of the parameter, or the default value if the parameter
was not specified</dd>
<dt><span class="seeLabel">See Also:</span></dt>
<dd><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Integer.html?is-external=true#parseInt-java.lang.String-" title="class or interface in java.lang"><code>Integer.parseInt(String)</code></a></dd>
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<pre>public&nbsp;long&nbsp;getLongParameter(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;name)</pre>
<div class="block">Get the value of a specified parameter as a long. An exception will be
thrown if the parameter is not specified or if it is not a long.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>name</code> - the name of the parameter whose value should be retrieved</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the value of the parameter</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/NumberFormatException.html?is-external=true" title="class or interface in java.lang">NumberFormatException</a></code> - if the parameter is not specified or is not a long</dd>
<dt><span class="seeLabel">See Also:</span></dt>
<dd><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Long.html?is-external=true#parseLong-java.lang.String-" title="class or interface in java.lang"><code>Long.parseLong(String)</code></a></dd>
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<h4>getLongParameter</h4>
<pre>public&nbsp;long&nbsp;getLongParameter(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;name,
long&nbsp;defaultValue)</pre>
<div class="block">Get the value of a specified parameter as along, or return the specified
default value if the value was not specified or is not a long. A warning
will be logged if the value is not a long. The value may be specified in
decimal, hexadecimal, or octal, as defined by Long.decode().</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>name</code> - the name of the parameter whose value should be retrieved</dd>
<dd><code>defaultValue</code> - the default value to return if the value of this parameter was
not specified</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the value of the parameter, or the default value if the parameter
was not specified</dd>
<dt><span class="seeLabel">See Also:</span></dt>
<dd><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Long.html?is-external=true#decode-java.lang.String-" title="class or interface in java.lang"><code>Long.decode(String)</code></a></dd>
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<h4>getBooleanParameter</h4>
<pre>public&nbsp;boolean&nbsp;getBooleanParameter(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;name,
boolean&nbsp;defaultValue)</pre>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>name</code> - Parameter name</dd>
<dd><code>defaultValue</code> - Default value used if name is not in params</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>boolean the value of the parameter in the map, or the default value</dd>
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