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Posted to commits@camel.apache.org by bu...@apache.org on 2015/09/02 17:18:55 UTC

svn commit: r964059 - in /websites/production/camel/content: cache/main.pageCache groovy-dsl.html

Author: buildbot
Date: Wed Sep  2 15:18:55 2015
New Revision: 964059

Log:
Production update by buildbot for camel

Modified:
    websites/production/camel/content/cache/main.pageCache
    websites/production/camel/content/groovy-dsl.html

Modified: websites/production/camel/content/cache/main.pageCache
==============================================================================
Binary files - no diff available.

Modified: websites/production/camel/content/groovy-dsl.html
==============================================================================
--- websites/production/camel/content/groovy-dsl.html (original)
+++ websites/production/camel/content/groovy-dsl.html Wed Sep  2 15:18:55 2015
@@ -85,16 +85,16 @@
 	<tbody>
         <tr>
         <td valign="top" width="100%">
-<div class="wiki-content maincontent"><h3 id="GroovyDSL-AbouttheGroovyDSL">About the Groovy DSL</h3><p>The Groovy DSL implementation is built on top of the existing Java-based <a shape="rect" href="dsl.html">DSL</a>, but it additionally allows to use Groovy language features in your routes, particularly <a shape="rect" class="external-link" href="http://groovy.codehaus.org/Closures" rel="nofollow">Closures</a> acting as <a shape="rect" href="processor.html">Processor</a>, <a shape="rect" href="expression.html">Expression</a>, <a shape="rect" href="predicate.html">Predicate</a>, or <a shape="rect" href="aggregator.html">Aggregation Strategy</a>.<br clear="none"> With the Groovy DSL you write your RouteBuilder classes entirely in Groovy, while the <a shape="rect" href="scripting-languages.html">scripting component</a> allows to embed small scripts into Java routes. The Groovy DSL requires Groovy 2.0 or newer and is available as of <strong>Camel 2.11</strong>.</p><h3 id="GroovyDSL-Intr
 oduction">Introduction</h3><p>Because Groovy is syntactically very similar to Java, you can write your Groovy routes just like Java routes. The same Java DSL classes are being used, with the exception that some of the DSL classes get extended with a bunch of new methods at runtime. This is achieved by turning camel-groovy into a Groovy <a shape="rect" class="external-link" href="http://docs.codehaus.org/display/GROOVY/Creating+an+extension+module" rel="nofollow">Extension Module</a> that defines extension methods on existing classes.</p><p>The majority of the extension methods allow <a shape="rect" class="external-link" href="http://groovy.codehaus.org/Closures" rel="nofollow">Closures</a> to be used as parameters e.g. for expressions, predicates, processors. The following example reverses a string in the message body and then prints the value to System.out:</p><div class="code panel pdl" style="border-width: 1px;"><div class="codeHeader panelHeader pdl" style="border-bottom-width: 
 1px;"><b>MyRouteBuilder.groovy</b></div><div class="codeContent panelContent pdl">
-<pre class="brush: java; gutter: false; theme: Default" style="font-size:12px;">...
-   from('direct:test')
+<div class="wiki-content maincontent"><h3 id="GroovyDSL-AbouttheGroovyDSL">About the Groovy DSL</h3><p>The Groovy DSL implementation is built on top of the existing Java-based <a shape="rect" href="dsl.html">DSL</a>, but it additionally allows to use Groovy language features in your routes, particularly <a shape="rect" class="external-link" href="http://www.groovy-lang.org/closures.html" rel="nofollow">Closures</a> acting as <a shape="rect" href="processor.html">Processor</a>, <a shape="rect" href="expression.html">Expression</a>, <a shape="rect" href="predicate.html">Predicate</a>, or <a shape="rect" href="aggregator.html">Aggregation Strategy</a>.<br clear="none"> With the Groovy DSL you write your RouteBuilder classes entirely in Groovy, while the <a shape="rect" href="scripting-languages.html">scripting component</a> allows to embed small scripts into Java routes. The Groovy DSL requires Groovy 2.0 or newer and is available as of <strong>Camel 2.11</strong>.</p><h3 id="GroovyDSL
 -Introduction">Introduction</h3><p>Because Groovy is syntactically very similar to Java, you can write your Groovy routes just like Java routes. The same Java DSL classes are being used, with the exception that some of the DSL classes get extended with a bunch of new methods at runtime. This is achieved by turning camel-groovy into a Groovy <a shape="rect" class="external-link" href="http://docs.codehaus.org/display/GROOVY/Creating+an+extension+module" rel="nofollow">Extension Module</a> that defines extension methods on existing classes.</p><p>The majority of the extension methods allow <a shape="rect" class="external-link" href="http://www.groovy-lang.org/closures.html" rel="nofollow">Closures</a> to be used as parameters e.g. for expressions, predicates, processors. The following example reverses a string in the message body and then prints the value to System.out:</p><div class="code panel pdl" style="border-width: 1px;"><div class="codeHeader panelHeader pdl" style="border-bott
 om-width: 1px;"><b>MyRouteBuilder.groovy</b></div><div class="codeContent panelContent pdl">
+<script class="brush: java; gutter: false; theme: Default" type="syntaxhighlighter"><![CDATA[...
+   from(&#39;direct:test&#39;)
       .transform { it.in.body.reverse() }
       .process { println it.in.body }
 ...
-</pre>
+]]></script>
 </div></div><p>The corresponding route in Java would look something like this:</p><div class="code panel pdl" style="border-width: 1px;"><div class="codeHeader panelHeader pdl" style="border-bottom-width: 1px;"><b>MyRouteBuilder.java</b></div><div class="codeContent panelContent pdl">
-<pre class="brush: java; gutter: false; theme: Default" style="font-size:12px;">...
-   from("direct:test")
+<script class="brush: java; gutter: false; theme: Default" type="syntaxhighlighter"><![CDATA[...
+   from(&quot;direct:test&quot;)
       .transform(new Expression() {
          @Override
          public Object evaluate(Exchange e) {
@@ -108,16 +108,16 @@
          }
       });
 ...
-</pre>
+]]></script>
 </div></div><h3 id="GroovyDSL-DevelopingwiththeGroovyDSL">Developing with the Groovy DSL</h3><p>To be able to use the Groovy DSL in your camel routes you need to add the a dependency on <strong>camel-groovy</strong> which implements the Groovy DSL.</p><p>If you use Maven you can just add the following to your pom.xml, substituting the version number for the latest &amp; greatest release (see the download page for the latest versions).</p><div class="code panel pdl" style="border-width: 1px;"><div class="codeContent panelContent pdl">
-<pre class="brush: xml; gutter: false; theme: Default" style="font-size:12px;">&lt;dependency&gt;
+<script class="brush: xml; gutter: false; theme: Default" type="syntaxhighlighter"><![CDATA[&lt;dependency&gt;
   &lt;groupId&gt;org.apache.camel&lt;/groupId&gt;
   &lt;artifactId&gt;camel-groovy&lt;/artifactId&gt;
   &lt;version&gt;2.11.0&lt;/version&gt;
 &lt;/dependency&gt;
-</pre>
+]]></script>
 </div></div><p>Additionally you need to make sure that the Groovy classes will be compiled. You can either use gmaven for this or, particularly with mixed projects containing Java and Groovy code, you might want to use the <a shape="rect" class="external-link" href="http://groovy.codehaus.org/Groovy-Eclipse+compiler+plugin+for+Maven" rel="nofollow">Groovy Eclipse compiler</a>:</p><div class="code panel pdl" style="border-width: 1px;"><div class="codeContent panelContent pdl">
-<pre class="brush: xml; gutter: false; theme: Default" style="font-size:12px;">  &lt;plugin&gt;
+<script class="brush: xml; gutter: false; theme: Default" type="syntaxhighlighter"><![CDATA[  &lt;plugin&gt;
     &lt;artifactId&gt;maven-compiler-plugin&lt;/artifactId&gt;
     &lt;configuration&gt;
       &lt;compilerId&gt;groovy-eclipse-compiler&lt;/compilerId&gt;
@@ -130,9 +130,9 @@
       &lt;/dependency&gt;
     &lt;/dependencies&gt;
   &lt;/plugin&gt;
-</pre>
+]]></script>
 </div></div><p>As Eclipse user, you might want to configure the Maven Eclipse plugin in a way so that your project is set up correctly for using <a shape="rect" class="external-link" href="http://groovy.codehaus.org/Eclipse+Plugin" rel="nofollow">Eclipse Plugin for Groovy</a> when <code>mvn eclipse:eclipse</code> is executed:</p><div class="code panel pdl" style="border-width: 1px;"><div class="codeContent panelContent pdl">
-<pre class="brush: xml; gutter: false; theme: Default" style="font-size:12px;">  &lt;plugin&gt;
+<script class="brush: xml; gutter: false; theme: Default" type="syntaxhighlighter"><![CDATA[  &lt;plugin&gt;
     &lt;groupId&gt;org.apache.maven.plugins&lt;/groupId&gt;
     &lt;artifactId&gt;maven-eclipse-plugin&lt;/artifactId&gt;
     &lt;configuration&gt;
@@ -145,85 +145,85 @@
       &lt;/classpathContainers&gt;              
     &lt;/configuration&gt;
   &lt;/plugin&gt;	  
-</pre>
+]]></script>
 </div></div><h4 id="GroovyDSL-UsingClosuresinyourroutes">Using Closures in your routes</h4><p>Groovy closures can be used to write concise implementations of Camel processors, expressions, predicates, and aggregation strategies. It is recommended to keep more complicated implementations of these objects in their own classes, e.g. to be able to test them more easily and not to clutter up your routes with business logic.</p><h5 id="GroovyDSL-ProcessorClosures">Processor Closures</h5><p>All Java DSL parameters of type <code>org.apache.camel.Processor</code> can be replaced by a closure that accepts an object of type <code>org.apache.camel.Exchange</code> as only parameter. The return value of the closure is disregarded. All closures may also refer to variables not listed in their parameter list. Example:</p><div class="code panel pdl" style="border-width: 1px;"><div class="codeContent panelContent pdl">
-<pre class="brush: java; gutter: false; theme: Default" style="font-size:12px;">...
+<script class="brush: java; gutter: false; theme: Default" type="syntaxhighlighter"><![CDATA[...
    private String someValue
 ...
-   from('direct:test')
+   from(&#39;direct:test&#39;)
       .process { Exchange exchange -&gt; println (exchange.in.body + someValue) }
       .process { println (it.in.body + someValue) } // equivalent
 ...
-</pre>
+]]></script>
 </div></div><h5 id="GroovyDSL-ExpressionClosures">Expression Closures</h5><p>All Java DSL parameters of type <code>org.apache.camel.Expression</code> can be replaced by a closure that accepts an object of type <code>org.apache.camel.Exchange</code> as only parameter. The return value of the closure is the result of the expression. Example:</p><div class="code panel pdl" style="border-width: 1px;"><div class="codeContent panelContent pdl">
-<pre class="brush: java; gutter: false; theme: Default" style="font-size:12px;">...
+<script class="brush: java; gutter: false; theme: Default" type="syntaxhighlighter"><![CDATA[...
    private String someValue
 ...
-   from('direct:test')
+   from(&#39;direct:test&#39;)
       .transform { it.in.body.reverse() + someValue }
-      .setHeader("myHeader") { someValue.reverse() }
+      .setHeader(&quot;myHeader&quot;) { someValue.reverse() }
 ...
-</pre>
+]]></script>
 </div></div><h5 id="GroovyDSL-PredicateClosures">Predicate Closures</h5><p>All Java DSL parameters of type <code>org.apache.camel.Predicate</code> can be replaced by a closure that accepts an object of type <code>org.apache.camel.Exchange</code> as only parameter. The return value of the closure is translated into a boolean value representing the result of the predicate. Example:</p><div class="code panel pdl" style="border-width: 1px;"><div class="codeContent panelContent pdl">
-<pre class="brush: java; gutter: false; theme: Default" style="font-size:12px;">...
+<script class="brush: java; gutter: false; theme: Default" type="syntaxhighlighter"><![CDATA[...
    private String someValue
 
    // This time, the closure is stored in a variable
    def pred = { Exchange e -&gt; e.in.body != someValue }
 ...
-   from('direct:test')
+   from(&#39;direct:test&#39;)
       .filter(pred)
 ...
-</pre>
+]]></script>
 </div></div><h5 id="GroovyDSL-AggregationStrategyClosures">Aggregation Strategy Closures</h5><p>Java DSL parameters of type <code>org.apache.camel.processor.aggregate.AggregationStrategy</code> can be replaced by a closure that accepts two objects of type <code>org.apache.camel.Exchange</code> representing the two Exchanges to be aggregated. The return value of the closure must be the aggregated Exchange. Example:</p><div class="code panel pdl" style="border-width: 1px;"><div class="codeContent panelContent pdl">
-<pre class="brush: java; gutter: false; theme: Default" style="font-size:12px;">...
+<script class="brush: java; gutter: false; theme: Default" type="syntaxhighlighter"><![CDATA[...
    private String separator
 ...
-   from('direct:test1')
-      .enrich('direct:enrich') { Exchange original, Exchange resource -&gt; 
+   from(&#39;direct:test1&#39;)
+      .enrich(&#39;direct:enrich&#39;) { Exchange original, Exchange resource -&gt; 
          original.in.body += resource.in.body + separator
-         original  // don't forget to return resulting exchange
+         original  // don&#39;t forget to return resulting exchange
       }
 ...
-</pre>
+]]></script>
 </div></div><h5 id="GroovyDSL-Genericclosurebridges">Generic closure bridges</h5><p>In addition to the above-mentioned DSL extensions, you can use closures even if no DSL method signature with closure parameters is available. Assuming there's no <code>filter(Closure)</code> method, you could instead write:</p><div class="code panel pdl" style="border-width: 1px;"><div class="codeContent panelContent pdl">
-<pre class="brush: java; gutter: false; theme: Default" style="font-size:12px;">...
+<script class="brush: java; gutter: false; theme: Default" type="syntaxhighlighter"><![CDATA[...
    private String someValue
 
    // This time, the closure is stored in a variable
    def pred = { Exchange e -&gt; e.in.body != someValue }
 ...
-   from('direct:test')
+   from(&#39;direct:test&#39;)
       // predicate(Closure) -&gt; org.apache.camel.Predicate
       .filter(predicate(pred))
 ...
-</pre>
-</div></div><p>Similarly, <code>expression(Closure)</code> returns a Camel expression, <code>processor(Closure)</code> returns a Processor, and <code>aggregator(Closure)</code> returns an AggregationStrategy.</p><h4 id="GroovyDSL-UsingGroovyXMLprocessing">Using Groovy XML processing</h4><p>Groovy provides special <a shape="rect" class="external-link" href="http://groovy.codehaus.org/Processing+XML" rel="nofollow">XML processing support</a> through its <code>XmlParser</code>, <code>XmlNodePrinter</code> and <code>XmlSlurper</code> classes. camel-groovy provides two <a shape="rect" href="data-format.html">data formats</a> to use these classes directly in your routes.</p><div class="code panel pdl" style="border-width: 1px;"><div class="codeHeader panelHeader pdl" style="border-bottom-width: 1px;"><b>Unmarshal XML with XmlParser</b></div><div class="codeContent panelContent pdl">
-<pre class="brush: java; gutter: false; theme: Default" style="font-size:12px;">...
-   from('direct:test1')
+]]></script>
+</div></div><p>Similarly, <code>expression(Closure)</code> returns a Camel expression, <code>processor(Closure)</code> returns a Processor, and <code>aggregator(Closure)</code> returns an AggregationStrategy.</p><h4 id="GroovyDSL-UsingGroovyXMLprocessing">Using Groovy XML processing</h4><p>Groovy provides special <a shape="rect" class="external-link" href="http://groovy-lang.org/processing-xml.html" rel="nofollow">XML processing support</a> through its <code>XmlParser</code>, <code>XmlNodePrinter</code> and <code>XmlSlurper</code> classes. camel-groovy provides two <a shape="rect" href="data-format.html">data formats</a> to use these classes directly in your routes.</p><div class="code panel pdl" style="border-width: 1px;"><div class="codeHeader panelHeader pdl" style="border-bottom-width: 1px;"><b>Unmarshal XML with XmlParser</b></div><div class="codeContent panelContent pdl">
+<script class="brush: java; gutter: false; theme: Default" type="syntaxhighlighter"><![CDATA[...
+   from(&#39;direct:test1&#39;)
       .unmarshal().gnode() 
       // message body is now of type groovy.util.Node
 ...
-</pre>
+]]></script>
 </div></div><p>By default, XML processing is <em>namespace-aware</em>. You can change this by providing a boolean <code>false</code> parameter.</p><div class="code panel pdl" style="border-width: 1px;"><div class="codeHeader panelHeader pdl" style="border-bottom-width: 1px;"><b>Unmarshal XML with XmlSlurper</b></div><div class="codeContent panelContent pdl">
-<pre class="brush: java; gutter: false; theme: Default" style="font-size:12px;">...
-   from('direct:test1')
+<script class="brush: java; gutter: false; theme: Default" type="syntaxhighlighter"><![CDATA[...
+   from(&#39;direct:test1&#39;)
       .unmarshal().gpath(false) // explicitly namespace-unaware
       // message body is now of type groovy.util.slurpersupport.GPathResult
 ...
-</pre>
+]]></script>
 </div></div><p>Currently, marshalling is only supported for <code>groovy.util.Node</code> objects.</p><div class="code panel pdl" style="border-width: 1px;"><div class="codeHeader panelHeader pdl" style="border-bottom-width: 1px;"><b>Marshal XML with XmlNodePrinter</b></div><div class="codeContent panelContent pdl">
-<pre class="brush: java; gutter: false; theme: Default" style="font-size:12px;">...
-   from('direct:test1')
+<script class="brush: java; gutter: false; theme: Default" type="syntaxhighlighter"><![CDATA[...
+   from(&#39;direct:test1&#39;)
       // message body must be of type groovy.util.Node
       .marshal().gnode()
 ...
-</pre>
-</div></div><h4 id="GroovyDSL-UsingGroovyGStrings">Using Groovy GStrings</h4><p>Groovy <a shape="rect" class="external-link" href="http://groovy.codehaus.org/Strings+and+GString" rel="nofollow">GStrings</a> are declared inside double-quotes and can contain arbitrary Groovy expressions like accessing properties or calling methods, e.g.</p><div class="code panel pdl" style="border-width: 1px;"><div class="codeContent panelContent pdl">
-<pre class="brush: java; gutter: false; theme: Default" style="font-size:12px;">def x = "It is currently ${ new Date() }"
-</pre>
-</div></div><p>Because GStrings aren't Strings, camel-groovy adds the necessary <a shape="rect" href="type-converter.html">TypeConverter</a> to automatically turn them into the required type.</p><h4 id="GroovyDSL-CustomDSLextensions">Custom DSL extensions</h4><p>You can easily define your custom extensions - be it as a Java DSL extension for your Groovy routes or for any other class unrelated to Camel. All you have to do is to write your extension methods and provide a extension module descriptor - the details are described in the <a shape="rect" class="external-link" href="http://docs.codehaus.org/display/GROOVY/Creating+an+extension+module" rel="nofollow">Groovy documentation</a>. And as long as you don't require other extension methods, you can even use plain Java code to achieve this!<br clear="none"> As an example, let's write two DSL extensions to make commonly used DSL methods more concise:</p><div class="code panel pdl" style="border-width: 1px;"><div class="codeHeader panel
 Header pdl" style="border-bottom-width: 1px;"><b>MyExtension.java</b></div><div class="codeContent panelContent pdl">
-<pre class="brush: java; gutter: false; theme: Default" style="font-size:12px;">import org.apache.camel.Endpoint;
+]]></script>
+</div></div><h4 id="GroovyDSL-UsingGroovyGStrings">Using Groovy GStrings</h4><p>Groovy <a shape="rect" class="external-link" href="http://docs.groovy-lang.org/latest/html/documentation/index.html#all-strings" rel="nofollow">GStrings</a> are declared inside double-quotes and can contain arbitrary Groovy expressions like accessing properties or calling methods, e.g.</p><div class="code panel pdl" style="border-width: 1px;"><div class="codeContent panelContent pdl">
+<script class="brush: java; gutter: false; theme: Default" type="syntaxhighlighter"><![CDATA[def x = &quot;It is currently ${ new Date() }&quot;
+]]></script>
+</div></div><p>Because GStrings aren't Strings, camel-groovy adds the necessary <a shape="rect" href="type-converter.html">TypeConverter</a> to automatically turn them into the required type.</p><h4 id="GroovyDSL-CustomDSLextensions">Custom DSL extensions</h4><p>You can easily define your custom extensions - be it as a Java DSL extension for your Groovy routes or for any other class unrelated to Camel. All you have to do is to write your extension methods and provide a extension module descriptor - the details are described in the <a shape="rect" class="external-link" href="http://www.groovy-lang.org/metaprogramming.html#_extension_modules" rel="nofollow">Groovy documentation</a>. And as long as you don't require other extension methods, you can even use plain Java code to achieve this!<br clear="none"> As an example, let's write two DSL extensions to make commonly used DSL methods more concise:</p><div class="code panel pdl" style="border-width: 1px;"><div class="codeHeader panelHe
 ader pdl" style="border-bottom-width: 1px;"><b>MyExtension.java</b></div><div class="codeContent panelContent pdl">
+<script class="brush: java; gutter: false; theme: Default" type="syntaxhighlighter"><![CDATA[import org.apache.camel.Endpoint;
 import org.apache.camel.Predicate;
 
 public final class MyExtension {
@@ -247,37 +247,37 @@ public final class MyExtension {
     }
 
 }
-</pre>
+]]></script>
 </div></div><p>Add a corresponding extension module descriptor to <code>META-INF/services</code>:</p><div class="code panel pdl" style="border-width: 1px;"><div class="codeHeader panelHeader pdl" style="border-bottom-width: 1px;"><b>META-INF/services/org.codehaus.groovy.runtime.ExtensionModule</b></div><div class="codeContent panelContent pdl">
-<pre class="brush: java; gutter: false; theme: Default" style="font-size:12px;">moduleName=my-extension
+<script class="brush: java; gutter: false; theme: Default" type="syntaxhighlighter"><![CDATA[moduleName=my-extension
 moduleVersion=2.11
 extensionClasses=MyExtension
 staticExtensionClasses=
-</pre>
+]]></script>
 </div></div><p>And now your Groovy route can look like this:</p><div class="code panel pdl" style="border-width: 1px;"><div class="codeHeader panelHeader pdl" style="border-bottom-width: 1px;"><b>MyRoute.groovy</b></div><div class="codeContent panelContent pdl">
-<pre class="brush: java; gutter: false; theme: Default" style="font-size:12px;">...
-   fromId('direct:test1')
-      .fork('direct:null','direct:not-null',body().isNull())
+<script class="brush: java; gutter: false; theme: Default" type="syntaxhighlighter"><![CDATA[...
+   fromId(&#39;direct:test1&#39;)
+      .fork(&#39;direct:null&#39;,&#39;direct:not-null&#39;,body().isNull())
 ...
-</pre>
+]]></script>
 </div></div><p>Using the plain Java DSL, the route would look something like this:</p><div class="code panel pdl" style="border-width: 1px;"><div class="codeHeader panelHeader pdl" style="border-bottom-width: 1px;"><b>MyRoute.java</b></div><div class="codeContent panelContent pdl">
-<pre class="brush: java; gutter: false; theme: Default" style="font-size:12px;">...
-   from("direct:test1")
-      .routeId("direct:test1")
+<script class="brush: java; gutter: false; theme: Default" type="syntaxhighlighter"><![CDATA[...
+   from(&quot;direct:test1&quot;)
+      .routeId(&quot;direct:test1&quot;)
       .choice()
          .when(body().isNull())
-            .to("direct:null")
+            .to(&quot;direct:null&quot;)
          .otherwise()
-            .to("direct:not-null");
+            .to(&quot;direct:not-null&quot;);
 ...
-</pre>
+]]></script>
 </div></div></div>
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