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From conflue...@apache.org
Subject [CONF] Apache Camel > Asynchronous Routing Engine
Date Wed, 15 Dec 2010 09:56:00 GMT
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    <h2><a href="https://cwiki.apache.org/confluence/display/CAMEL/Asynchronous+Routing+Engine">Asynchronous
Routing Engine</a></h2>
    <h4>Page <b>edited</b> by             <a href="https://cwiki.apache.org/confluence/display/~njiang">willem
jiang</a>
    </h4>
        <br/>
                         <h4>Changes (1)</h4>
                                 
    
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            <table class="diff" cellpadding="0" cellspacing="0">
            <tr><td class="diff-snipped" >...<br></td></tr>
            <tr><td class="diff-unchanged" >h3. Forcing to use synchronous processing
<br> <br></td></tr>
            <tr><td class="diff-changed-lines" >You can configure the endpoints
with the option {{synchronous=true}} to force using synchronous processing. For example when
sending a web service request using [CXF], the caller will wait for the reply, if {{synchronous=true}}
was configured. Currently this option is supported by the <span class="diff-deleted-words"style="color:#999;background-color:#fdd;text-decoration:line-through;">producers
only.</span> <span class="diff-added-words"style="background-color: #dfd;"> all
the producers. If you don&#39;t want to let the [CXF] consumer leverage the CXF continuation
API to use the asynchronous processing, you can also use this option {{synchronous=true}}
to disable it.</span> The [JBI] and [NMR] component is always asynchronous and doesn&#39;t
support this option. <br></td></tr>
            <tr><td class="diff-unchanged" > <br>h2. Background information
<br></td></tr>
            <tr><td class="diff-snipped" >...<br></td></tr>
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</div>                            <h4>Full Content</h4>
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        <h2><a name="AsynchronousRoutingEngine-AsynchronousRoutingEngine"></a>Asynchronous
Routing Engine</h2>
<p><b>Available as of Camel 2.4</b></p>

<p>As of Camel 2.4 the asynchronous routing engine is back and kicking.<br/>
All the <a href="/confluence/display/CAMEL/Enterprise+Integration+Patterns" title="Enterprise
Integration Patterns">Enterprise Integration Patterns</a> is supported as well a
selected number of <a href="/confluence/display/CAMEL/Components" title="Components">Components</a>:</p>
<ul class="alternate" type="square">
	<li><a href="/confluence/display/CAMEL/JBI" title="JBI">JBI</a> (both consumer
and producer)</li>
	<li><a href="/confluence/display/CAMEL/NMR" title="NMR">NMR</a> (both consumer
and producer)</li>
	<li><a href="/confluence/display/CAMEL/Jetty" title="Jetty">Jetty</a> (both
consumer and producer)</li>
	<li><a href="/confluence/display/CAMEL/Netty" title="Netty">Netty</a> (only
producer)</li>
	<li><a href="/confluence/display/CAMEL/CXF" title="CXF">CXF</a> <b>Camel
2.5:</b> (both consumer and producer)</li>
	<li><a href="/confluence/display/CAMEL/CXFRS" title="CXFRS">CXFRS</a> <b>Camel
2.5:</b> (only consumer)</li>
	<li><a href="/confluence/display/CAMEL/JMS" title="JMS">JMS</a> <b>Camel
2.5:</b> (only producer for <a href="/confluence/display/CAMEL/Request+Reply" title="Request
Reply">Request Reply</a> messaging over JMS)</li>
</ul>


<p>When we say a component is supported, that means, the component is leveraging the
asynchronous model. For example <a href="/confluence/display/CAMEL/Jetty" title="Jetty">Jetty</a>
uses continuations and the async http client to be fully asynchronous and non blocked. That
means no threads will ever be blocked while waiting for a reply.</p>

<p>In the future additional <a href="/confluence/display/CAMEL/Components" title="Components">Components</a>
will be supported as well where it's applicable.</p>

<h3><a name="AsynchronousRoutingEngine-Forcingtousesynchronousprocessing"></a>Forcing
to use synchronous processing</h3>

<p>You can configure the endpoints with the option <tt>synchronous=true</tt>
to force using synchronous processing. For example when sending a web service request using
<a href="/confluence/display/CAMEL/CXF" title="CXF">CXF</a>, the caller will wait
for the reply, if <tt>synchronous=true</tt> was configured. Currently this option
is supported by the  all the producers. If you don't want to let the <a href="/confluence/display/CAMEL/CXF"
title="CXF">CXF</a> consumer leverage the CXF continuation API to use the asynchronous
processing, you can also use this option <tt>synchronous=true</tt> to disable
it. The <a href="/confluence/display/CAMEL/JBI" title="JBI">JBI</a> and <a
href="/confluence/display/CAMEL/NMR" title="NMR">NMR</a> component is always asynchronous
and doesn't support this option.</p>

<h2><a name="AsynchronousRoutingEngine-Backgroundinformation"></a>Background
information</h2>

<p>See <a href="/confluence/display/CAMEL/Asynchronous+Processing" title="Asynchronous
Processing">Asynchronous Processing</a> for additional information and the concepts
behind the asynchronous model.</p>

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