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From conflue...@apache.org
Subject [CONF] Apache Camel > RX
Date Mon, 04 Mar 2013 06:41:00 GMT
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    <h2><a href="https://cwiki.apache.org/confluence/display/CAMEL/RX">RX</a></h2>
    <h4>Page <b>edited</b> by             <a href="https://cwiki.apache.org/confluence/display/~jstrachan">James
Strachan</a>
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        <br/>
                         <h4>Changes (1)</h4>
                                 
    
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            <tr><td class="diff-snipped" >...<br></td></tr>
            <tr><td class="diff-unchanged" >You can then create an Observable&lt;Message&gt;
from any endpoint using the ReactiveCamel helper class. <br> <br></td></tr>
            <tr><td class="diff-changed-lines" ><span class="diff-changed-words">{code<span
class="diff-added-chars"style="background-color: #dfd;">:java</span>}</span>
<br></td></tr>
            <tr><td class="diff-unchanged" >import org.apache.camel.rx.*; <br>
<br></td></tr>
            <tr><td class="diff-snipped" >...<br></td></tr>
    
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    </div>                            <h4>Full Content</h4>
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        <h1><a name="RX-ReactiveCamel"></a>Reactive Camel</h1>

<p>The camel-rx library provides Camel support for the <a href="https://rx.codeplex.com/"
class="external-link" rel="nofollow">Reactive Extensions</a>&nbsp;(RX) using
the <a href="https://github.com/Netflix/RxJava/wiki" class="external-link" rel="nofollow">RxJava</a>
library.</p>

<p>You can think of RX as providing an API similar to Java 8 / Groovy / Scala like API
collections (methods like filter, forEach, map, flatMap etc) - but which operates on a stream
of events rather than a collection. So you could think of RX as like working with asynchronous
push based collections (rather than the traditional synchronous pull based collections).</p>

<p>In RX, if you have an <a href="http://netflix.github.com/RxJava/javadoc/rx/Observable.html"
class="external-link" rel="nofollow">Observable&lt;T&gt;</a> which behaves
quite like a Collection&lt;T&gt; in Java 8 so you can filter/map/concat and so forth.
The Observable&lt;T&gt; then acts as a typesafe composable API for working with asynchronous
events.</p>

<p>You can then create an Observable&lt;Message&gt; from any endpoint using
the ReactiveCamel helper class.</p>

<div class="code panel" style="border-width: 1px;"><div class="codeContent panelContent">
<pre class="code-java">
<span class="code-keyword">import</span> org.apache.camel.rx.*;

ReactiveCamel rx = <span class="code-keyword">new</span> ReactiveCamel(camelContext);
Observable&lt;Message&gt; observable = rx.toObservable(<span class="code-quote">"activemq:MyMessages"</span>);

<span class="code-comment">// we can now call filter/map/concat etc
</span>filtered = observable.filter(m -&gt; m.getHeader(<span class="code-quote">"foo"</span>)
!= <span class="code-keyword">null</span>); 
</pre>
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