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| <div class="subTitle">org.apache.jmeter.protocol.http.sampler</div> |
| <h2 title="Class ResourcesDownloader" class="title">Class ResourcesDownloader</h2> |
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| <ul class="inheritance"> |
| <li><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">java.lang.Object</a></li> |
| <li> |
| <ul class="inheritance"> |
| <li>org.apache.jmeter.protocol.http.sampler.ResourcesDownloader</li> |
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| <pre>public class <span class="typeNameLabel">ResourcesDownloader</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">Manages the parallel http resources download.<br> |
| A shared thread pool is used by all the sample.<br> |
| A sampler will usually do the following |
| <pre> <code> |
| // list of AsynSamplerResultHolder to download |
| List<Callable<AsynSamplerResultHolder>> list = ... |
| |
| // max parallel downloads |
| int maxConcurrentDownloads = ... |
| |
| // get the singleton instance |
| ResourcesDownloader resourcesDownloader = ResourcesDownloader.getInstance(); |
| |
| // schedule the downloads and wait for the completion |
| List<Future<AsynSamplerResultHolder>> retExec = |
| resourcesDownloader.invokeAllAndAwaitTermination(maxConcurrentDownloads, list); |
| |
| </code></pre> |
| |
| the call to invokeAllAndAwaitTermination will block until the downloads complete or get interrupted<br> |
| the Future list only contains task that have been scheduled in the threadpool.<br> |
| The status of those futures are either done or cancelled<br> |
| <br> |
| |
| Future enhancements: |
| <ul> |
| <li>this implementation should be replaced with a NIO async download |
| in order to reduce the number of threads needed</li> |
| </ul></div> |
| <dl> |
| <dt><span class="simpleTagLabel">Since:</span></dt> |
| <dd>3.0</dd> |
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| <td class="colFirst"><code>static class </code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/jmeter/protocol/http/sampler/ResourcesDownloader.AsynSamplerResultHolder.html" title="class in org.apache.jmeter.protocol.http.sampler">ResourcesDownloader.AsynSamplerResultHolder</a></span></code> |
| <div class="block">Holder of AsynSampler result</div> |
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| <td class="colFirst"><code>static <a href="../../../../../../org/apache/jmeter/protocol/http/sampler/ResourcesDownloader.html" title="class in org.apache.jmeter.protocol.http.sampler">ResourcesDownloader</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/jmeter/protocol/http/sampler/ResourcesDownloader.html#getInstance--">getInstance</a></span>()</code> </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><<a href="https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/Future.html?is-external=true" title="class or interface in java.util.concurrent">Future</a><<a href="../../../../../../org/apache/jmeter/protocol/http/sampler/ResourcesDownloader.AsynSamplerResultHolder.html" title="class in org.apache.jmeter.protocol.http.sampler">ResourcesDownloader.AsynSamplerResultHolder</a>>></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/jmeter/protocol/http/sampler/ResourcesDownloader.html#invokeAllAndAwaitTermination-int-java.util.List-">invokeAllAndAwaitTermination</a></span>(int maxConcurrentDownloads, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><<a href="https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/Callable.html?is-external=true" title="class or interface in java.util.concurrent">Callable</a><<a href="../../../../../../org/apache/jmeter/protocol/http/sampler/ResourcesDownloader.AsynSamplerResultHolder.html" title="class in org.apache.jmeter.protocol.http.sampler">ResourcesDownloader.AsynSamplerResultHolder</a>>> list)</code> |
| <div class="block">This method will block until the downloads complete or it get interrupted |
| the Future list returned by this method only contains tasks that have been scheduled in the threadpool.<br> |
| The status of those futures are either done or cancelled</div> |
| </td> |
| </tr> |
| <tr id="i2" class="altColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/jmeter/protocol/http/sampler/ResourcesDownloader.html#shrink--">shrink</a></span>()</code> |
| <div class="block">this method will try to shrink the thread pool size as much as possible |
| it should be called at the end of a test</div> |
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| <h4>getInstance</h4> |
| <pre>public static <a href="../../../../../../org/apache/jmeter/protocol/http/sampler/ResourcesDownloader.html" title="class in org.apache.jmeter.protocol.http.sampler">ResourcesDownloader</a> getInstance()</pre> |
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| <h4>shrink</h4> |
| <pre>public void shrink()</pre> |
| <div class="block">this method will try to shrink the thread pool size as much as possible |
| it should be called at the end of a test</div> |
| </li> |
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| <h4>invokeAllAndAwaitTermination</h4> |
| <pre>public <a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><<a href="https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/Future.html?is-external=true" title="class or interface in java.util.concurrent">Future</a><<a href="../../../../../../org/apache/jmeter/protocol/http/sampler/ResourcesDownloader.AsynSamplerResultHolder.html" title="class in org.apache.jmeter.protocol.http.sampler">ResourcesDownloader.AsynSamplerResultHolder</a>>> invokeAllAndAwaitTermination(int maxConcurrentDownloads, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><<a href="https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/Callable.html?is-external=true" title="class or interface in java.util.concurrent">Callable</a><<a href="../../../../../../org/apache/jmeter/protocol/http/sampler/ResourcesDownloader.AsynSamplerResultHolder.html" title="class in org.apache.jmeter.protocol.http.sampler">ResourcesDownloader.AsynSamplerResultHolder</a>>> list) |
| throws <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/InterruptedException.html?is-external=true" title="class or interface in java.lang">InterruptedException</a></pre> |
| <div class="block">This method will block until the downloads complete or it get interrupted |
| the Future list returned by this method only contains tasks that have been scheduled in the threadpool.<br> |
| The status of those futures are either done or cancelled</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>maxConcurrentDownloads</code> - max concurrent downloads</dd> |
| <dd><code>list</code> - list of resources to download</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>list tasks that have been scheduled</dd> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/InterruptedException.html?is-external=true" title="class or interface in java.lang">InterruptedException</a></code> - when interrupted while waiting</dd> |
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