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	<title>The Brian Olore Story &#187; httpclient</title>
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	<link>http://brian.olore.net</link>
	<description>Less of a story, more of a brain dump</description>
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		<title>Proper timeout handling with Apache HttpClient</title>
		<link>http://brian.olore.net/wp/2009/08/apache-httpclient-timeout/</link>
		<comments>http://brian.olore.net/wp/2009/08/apache-httpclient-timeout/#comments</comments>
		<pubDate>Mon, 24 Aug 2009 14:31:31 +0000</pubDate>
		<dc:creator>Brian</dc:creator>
				<category><![CDATA[work]]></category>
		<category><![CDATA[apache]]></category>
		<category><![CDATA[httpclient]]></category>
		<category><![CDATA[java]]></category>
		<category><![CDATA[timeouts]]></category>

		<guid isPermaLink="false">http://brian.olore.net/?p=86</guid>
		<description><![CDATA[I&#8217;ve seen some really bad things happen when developers don&#8217;t code in proper timeout handling. Occasionally I&#8217;ve been asked what the best way to handle timeouts is &#8211; so I thought I&#8217;d share my take on it: MultiThreadedHttpConnectionManager connectionManager =  new MultiThreadedHttpConnectionManager&#40;&#41;; HttpConnectionManagerParams params = connectionManager.getParams&#40;&#41;; params.setConnectionTimeout&#40;connectiontimeout&#41;; //set connection timeout (how long it takes to [...]]]></description>
			<content:encoded><![CDATA[<p>I&#8217;ve seen some really bad things happen when developers don&#8217;t code in proper timeout handling. Occasionally I&#8217;ve been asked what the best way to handle timeouts is &#8211; so I thought I&#8217;d share my take on it:</p>
<div class="dean_ch" style="overflow: scroll;white-space: nowrap;">MultiThreadedHttpConnectionManager connectionManager =  <span class="kw2">new</span> MultiThreadedHttpConnectionManager<span class="br0">&#40;</span><span class="br0">&#41;</span>;<br />
HttpConnectionManagerParams params = connectionManager.<span class="me1">getParams</span><span class="br0">&#40;</span><span class="br0">&#41;</span>;</p>
<p>params.<span class="me1">setConnectionTimeout</span><span class="br0">&#40;</span>connectiontimeout<span class="br0">&#41;</span>; <span class="co1">//set connection timeout (how long it takes to connect to remote host)</span><br />
params.<span class="me1">setSoTimeout</span><span class="br0">&#40;</span>sotimeout<span class="br0">&#41;</span>; <span class="co1">//set socket timeout (how long it takes to retrieve data from remote host)</span></p>
<p>HttpMethodBase baseMethod = <span class="kw2">null</span>;</p>
<p><span class="kw2">try</span> <span class="br0">&#123;</span><br />
&nbsp; HttpClient httpClient = <span class="kw2">new</span> HttpClient<span class="br0">&#40;</span>connectionManager<span class="br0">&#41;</span>;<br />
&nbsp; httpClient.<span class="me1">getParams</span><span class="br0">&#40;</span><span class="br0">&#41;</span>.<span class="me1">setParameter</span><span class="br0">&#40;</span><span class="st0">&quot;http.connection-manager.timeout&quot;</span>, poolTimeout<span class="br0">&#41;</span>; <span class="co1">//set timeout on how long we&#8217;ll wait for a connection from the pool</span></p>
<p>&nbsp; baseMethod = <span class="kw2">new</span> GetMethod<span class="br0">&#40;</span>&#8230;<span class="br0">&#41;</span>;<br />
&nbsp; <span class="kw4">int</span> statusCode = httpClient.<span class="me1">executeMethod</span><span class="br0">&#40;</span>&#8230;<span class="br0">&#41;</span>;</p>
<p>&nbsp; &#8230;<br />
<span class="br0">&#125;</span><br />
<span class="kw2">catch</span> <span class="br0">&#40;</span>ConnectTimeoutException cte <span class="br0">&#41;</span><span class="br0">&#123;</span><br />
&nbsp; <span class="co1">//Took too long to connect to remote host</span><br />
<span class="br0">&#125;</span><br />
<span class="kw2">catch</span> <span class="br0">&#40;</span>SocketTimeoutException ste<span class="br0">&#41;</span><span class="br0">&#123;</span><br />
&nbsp; <span class="co1">//Remote host didn&#8217;t respond in time</span><br />
<span class="br0">&#125;</span><br />
<span class="kw2">catch</span> <span class="br0">&#40;</span><a href="http://www.google.com/search?hl=en&amp;q=allinurl%3AException+java.sun.com&amp;btnI=I%27m%20Feeling%20Lucky"><span class="kw3">Exception</span></a> se<span class="br0">&#41;</span><span class="br0">&#123;</span><br />
&nbsp; <span class="co1">//Some other error occurred</span><br />
<span class="br0">&#125;</span><br />
<span class="kw2">finally</span> <span class="br0">&#123;</span><br />
&nbsp; <span class="kw1">if</span> <span class="br0">&#40;</span>baseMethod != <span class="kw2">null</span><span class="br0">&#41;</span><br />
&nbsp; &nbsp; baseMethod.<span class="me1">releaseConnection</span><span class="br0">&#40;</span><span class="br0">&#41;</span>;<br />
<span class="br0">&#125;</span></div>
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