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+ <ul style="left: 14em; float: none; width: 14em; display: none; visibility: hidden;">
+ <li style="white-space: normal; float: left; width: 100%;"><a style="float: none; width: auto;" href="http://felix.apache.org/site/ipojo-in-10-minutes.html" title="iPOJO in 10 minutes">iPOJO in 10 minutes</a></li>
+ <li style="white-space: normal; float: left; width: 100%;"><a style="float: none; width: auto;" href="http://felix.apache.org/site/how-to-use-ipojo-annotations.html" title="How to use iPOJO Annotations">Using Annotations</a></li>
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+ <li style="white-space: normal; float: left; width: 100%;"><a style="float: none; width: auto;" href="http://felix.apache.org/site/ipojo-advanced-tutorial.html" title="iPOJO Advanced Tutorial">Advanced tutorial</a></li>
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+ <li style="white-space: normal; float: left; width: 100%;"><a style="float: none; width: auto;" href="http://felix.apache.org/site/ipojo-composition-tutorial.html" title="iPOJO Composition Tutorial">Application Composition</a></li>
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+ <li style="white-space: normal; float: left; width: 100%;"><a style="float: none; width: auto;" href="http://felix.apache.org/site/service-requirement-handler.html" title="Service Requirement Handler">Requiring a service</a></li>
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+ <li style="white-space: normal; float: left; width: 100%;"><a style="float: none; width: auto;" href="http://felix.apache.org/site/controller-lifecycle-handler.html" title="Controller Lifecycle Handler">Impacting the lifecycle</a></li>
+ <li style="white-space: normal; float: left; width: 100%;"><a style="float: none; width: auto;" href="http://felix.apache.org/site/event-admin-handlers.html" title="Event Admin Handlers">Asynchronous communication</a></li>
+ <li style="white-space: normal; float: left; width: 100%;"><a style="float: none; width: auto;" href="http://felix.apache.org/site/ipojo-jmx-handler.html" title="iPOJO JMX Handler">JMX management</a></li>
+ <li style="white-space: normal; float: left; width: 100%;"><a style="float: none; width: auto;" href="http://felix.apache.org/site/extender-pattern-handler.html" title="Extender Pattern Handler">Extender pattern</a></li>
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+ <li style="white-space: normal; float: left; width: 100%;"><a style="float: none; width: auto;" href="http://felix.apache.org/site/temporal-service-dependency.html" title="Temporal Service Dependency">Temporal dependencies</a></li>
+ </ul>
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+ <li style="white-space: normal; float: left; width: 100%;"><a style="float: none; width: auto;" href="http://felix.apache.org/site/how-to-write-your-own-handler.html" title="How to write your own handler">Handler guide</a></li>
+ <li style="white-space: normal; float: left; width: 100%;"><a style="float: none; width: auto;" href="http://felix.apache.org/site/how-to-use-ipojo-manipulation-metadata.html" title="How to use iPOJO Manipulation Metadata">Manipulation Metadata </a></li>
+ <li style="white-space: normal; float: left; width: 100%;"><a style="float: none; width: auto;" href="http://felix.apache.org/site/dive-into-the-ipojo-manipulation-depths.html" title="Dive into the iPOJO Manipulation depths">Dive into the iPOJO Manipulation depths</a></li>
+ </ul>
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+<ul style="float: none; width: 14em; display: none; visibility: hidden;">
+ <li style="white-space: normal; float: left; width: 100%;"><a style="float: none; width: auto;" href="http://felix.apache.org/site/ipojo-ant-task.html" title="iPOJO Ant Task">Ant Task</a></li>
+ <li style="white-space: normal; float: left; width: 100%;"><a style="float: none; width: auto;" href="http://felix.apache.org/site/ipojo-eclipse-plug-in.html" title="iPOJO Eclipse Plug-in">Eclipse Plugin</a></li>
+ <li style="white-space: normal; float: left; width: 100%;"><a style="float: none; width: auto;" href="http://felix.apache.org/site/ipojo-maven-plug-in.html" title="iPOJO Maven Plug-in">Maven Plugin</a></li>
+ <li style="white-space: normal; float: left; width: 100%;"><a style="float: none; width: auto;" href="http://felix.apache.org/site/apache-felix-ipojo-online-manipulator.html" title="apache-felix-ipojo-online-manipulator">Online Manipulator</a></li>
+ <li style="white-space: normal; float: left; width: 100%;"><a style="float: none; width: auto;" href="http://felix.apache.org/site/ipojo-webconsole-plugin.html" title="iPOJO Webconsole Plugin">Webconsole plugin</a></li>
+ <li style="white-space: normal; float: left; width: 100%;"><a style="float: none; width: auto;" href="http://felix.apache.org/site/apache-felix-ipojo-junit4osgi.html" title="apache-felix-ipojo-junit4osgi">Junit4OSGi</a></li>
+</ul>
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+ <li style="white-space: normal; float: left; width: 100%;"><a style="float: none; width: auto;" href="http://felix.apache.org/site/apache-felix-ipojo-supportedosgi.html" title="apache-felix-ipojo-supportedOSGi">Supported OSGi Implementations</a></li>
+ <li style="white-space: normal; float: left; width: 100%;"><a style="float: none; width: auto;" href="http://ipojo-dark-side.blogspot.com/" rel="nofollow">iPOJO's Dark Side Blog</a></li>
+ <li style="white-space: normal; float: left; width: 100%;"><a style="float: none; width: auto;" href="http://felix.apache.org/site/article-presentations.html" title="Article & Presentations">Article & Presentations</a></li>
+</ul>
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+</div> <!-- Page header -->
+
+
+<div class="content">
+
+<h1><a name="apache-felix-ipojo-api-iPOJOAPI"></a>iPOJO API</h1>
+
+<p><em>The iPOJO API provides a third way to describe iPOJO components.
+With the API, you can dynamically create new components types and
+create instances from them. Your component types are described with an
+API. To use the API, deploy and start the iPOJO-API bundle and the
+iPOJO core bundle.</em></p>
+
+<div class="toc">
+<ul>
+ <li><a href="#apache-felix-ipojo-api-Asimpleexample">A simple example</a></li>
+ <li><a href="#apache-felix-ipojo-api-PrimitiveComponentTypebasics">Primitive Component Type basics</a></li>
+ <li><a href="#apache-felix-ipojo-api-ImmediateComponent%252CValidateandInvalidateMethod">Immediate Component, Validate and Invalidate Method</a></li>
+ <li><a href="#apache-felix-ipojo-api-Declaringservices">Declaring services</a></li>
+ <li><a href="#apache-felix-ipojo-api-ServiceDependencies">Service Dependencies</a></li>
+ <li><a href="#apache-felix-ipojo-api-Properties">Properties</a></li>
+ <li><a href="#apache-felix-ipojo-api-TemporalDependencies">Temporal Dependencies</a></li>
+ <li><a href="#apache-felix-ipojo-api-Instancecreation">Instance creation</a></li>
+ <li><a href="#apache-felix-ipojo-api-ManagedServiceandPropagation">Managed Service and Propagation</a></li>
+ <li><a href="#apache-felix-ipojo-api-ManagingiPOJOFactory">Managing iPOJO Factory</a></li>
+ <li><a href="#apache-felix-ipojo-api-AccesstotheintrospectionAPI">Access to the introspection API</a></li>
+ <li><a href="#apache-felix-ipojo-api-SingletonComponentType">Singleton Component Type</a></li>
+ <li><a href="#apache-felix-ipojo-api-Usingexternalhandlers">Using external handlers</a></li>
+ <li><a href="#apache-felix-ipojo-api-CreatingcompositionwiththeAPI">Creating composition with the API</a></li>
+</ul></div>
+
+
+<div class="panelMacro"><table class="infoMacro"><colgroup><col width="24"><col></colgroup><tbody><tr><td valign="top"><img src="apache-felix-ipojo-api_files/information.gif" alt="" border="0" align="absmiddle" height="16" width="16"></td><td><b>1.3.0-SNAPSHOT feature</b><br><p>The API is a 1.3.0-SNAPSHOT feature, and is not available in the 1.2.0 release.</p></td></tr></tbody></table></div>
+
+<h2><a name="apache-felix-ipojo-api-Asimpleexample"></a>A simple example</h2>
+
+<p>Let's imagine a simple component providing a service Foo. The following code is the implementation class of our component:</p>
+<div class="code">
+<div class="dp-highlighter"><table class="dp-c" border="0" cellpadding="0" cellspacing="0"><tbody><tr><td class="line1"><span></span><span class="keyword">package</span><span> org.example.service.impl; </span></td></tr><tr><td class="line2"> </td></tr><tr><td class="line1"><span class="keyword">import</span><span> org.example.service.Foo; </span></td></tr><tr><td class="line2"> </td></tr><tr><td class="line1"><span class="keyword">public</span><span> </span><span class="keyword">class</span><span> FooImpl </span><span class="keyword">implements</span><span> Foo { </span></td></tr><tr><td class="line2"> </td></tr><tr><td class="line1"> <span class="keyword">public</span><span> </span><span class="keyword">void</span><span> doSomething() { </span></td></tr><tr><td class="line2"> <span class="comment">// Do something...</span><span> </span></td></tr><tr><td class="line1"> } </td></tr><tr><td class="line2"> </td></tr><tr><td class="line1">} </td></tr></tbody></table></div><textarea style="display: none;" name="newcodemacro" class="java:nocontrols:nogutter" rows="10" readonly="readonly">package org.example.service.impl;
+
+import org.example.service.Foo;
+
+public class FooImpl implements Foo {
+
+ public void doSomething() {
+ // Do something...
+ }
+
+}</textarea>
+<script class="javascript">
+ if(!window.newcodemacro_initialised)
+ {
+ window.newcodemacro_initialised = true;
+ window.oldonloadmethod = window.onload;
+ window.onload = function(){
+ dp.SyntaxHighlighter.HighlightAll('newcodemacro');
+ if(window.oldonloadmethod)
+ {
+ window.oldonloadmethod();
+ }
+ }
+ }
+
+</script>
+</div>
+
+
+<p>To create the component type and an instance of the component type
+just create a class, get the bundle context (either from a
+Bundle-Activator, or from an iPOJO component), and write the following
+code:</p>
+<div class="code">
+<div class="dp-highlighter"><table class="dp-c" border="0" cellpadding="0" cellspacing="0"><tbody><tr><td class="line1"><span>new PrimitiveComponentType() </span></td></tr><tr><td class="line2"> .setBundleContext(context) </td></tr><tr><td class="line1"> .setClassName(FooImpl.<span class="keyword">class</span><span>.getName()) </span></td></tr><tr><td class="line2"> .addService(new Service()) <span class="comment">// Provide the Foo service</span><span> </span></td></tr><tr><td class="line1"> .createInstance(); <span class="comment">// Create the instance</span><span> </span></td></tr></tbody></table></div><textarea style="display: none;" name="newcodemacro" class="java:nocontrols:nogutter" rows="10" readonly="readonly">new PrimitiveComponentType()
+ .setBundleContext(context)
+ .setClassName(FooImpl.class.getName())
+ .addService(new Service()) // Provide the Foo service
+ .createInstance(); // Create the instance</textarea>
+<script class="javascript">
+ if(!window.newcodemacro_initialised)
+ {
+ window.newcodemacro_initialised = true;
+ window.oldonloadmethod = window.onload;
+ window.onload = function(){
+ dp.SyntaxHighlighter.HighlightAll('newcodemacro');
+ if(window.oldonloadmethod)
+ {
+ window.oldonloadmethod();
+ }
+ }
+ }
+
+</script>
+</div>
+
+
+<p>So, now let's imagine another component using this service. The
+following code is the implementation class of this component type:</p>
+<div class="code">
+<div class="dp-highlighter"><table class="dp-c" border="0" cellpadding="0" cellspacing="0"><tbody><tr><td class="line1"><span></span><span class="keyword">package</span><span> org.example.service.impl; </span></td></tr><tr><td class="line2"> </td></tr><tr><td class="line1"><span class="keyword">import</span><span> org.example.service.Foo; </span></td></tr><tr><td class="line2"> </td></tr><tr><td class="line1"><span class="keyword">public</span><span> </span><span class="keyword">class</span><span> MyComponentImpl { </span></td></tr><tr><td class="line2"> <span class="keyword">private</span><span> Foo myFoo; </span></td></tr><tr><td class="line1"> </td></tr><tr><td class="line2"> <span class="keyword">public</span><span> </span><span class="keyword">void</span><span> start() { </span></td></tr><tr><td class="line1"> myFoo.doSomething(); </td></tr><tr><td class="line2"> } </td></tr><tr><td class="line1"> </td></tr><tr><td class="line2">} </td></tr></tbody></table></div><textarea style="display: none;" name="newcodemacro" class="java:nocontrols:nogutter" rows="10" readonly="readonly">package org.example.service.impl;
+
+import org.example.service.Foo;
+
+public class MyComponentImpl {
+ private Foo myFoo;
+
+ public void start() {
+ myFoo.doSomething();
+ }
+
+}</textarea>
+<script class="javascript">
+ if(!window.newcodemacro_initialised)
+ {
+ window.newcodemacro_initialised = true;
+ window.oldonloadmethod = window.onload;
+ window.onload = function(){
+ dp.SyntaxHighlighter.HighlightAll('newcodemacro');
+ if(window.oldonloadmethod)
+ {
+ window.oldonloadmethod();
+ }
+ }
+ }
+
+</script>
+</div>
+
+
+<p>It is a regular iPOJO component expecting to get a Foo service in the <tt>myFoo</tt>
+field. It also has a method executed when the instance is valid using
+the Foo service. To describe this component, just write the following
+lines:</p>
+<div class="code">
+<div class="dp-highlighter"><table class="dp-c" border="0" cellpadding="0" cellspacing="0"><tbody><tr><td class="line1"><span>new PrimitiveComponentType() </span></td></tr><tr><td class="line2"> .setBundleContext(context) </td></tr><tr><td class="line1"> .setClassName(MyComponentImpl.<span class="keyword">class</span><span>.getName()) </span></td></tr><tr><td class="line2"> .addDependency(new Dependency().setField(<span class="string">"myFoo"</span><span>)) </span></td></tr><tr><td class="line1"> .setValidateMethod(<span class="string">"start"</span><span>) </span></td></tr><tr><td class="line2"> .createInstance(); </td></tr></tbody></table></div><textarea style="display: none;" name="newcodemacro" class="java:nocontrols:nogutter" rows="10" readonly="readonly">new PrimitiveComponentType()
+ .setBundleContext(context)
+ .setClassName(MyComponentImpl.class.getName())
+ .addDependency(new Dependency().setField("myFoo"))
+ .setValidateMethod("start")
+ .createInstance();</textarea>
+<script class="javascript">
+ if(!window.newcodemacro_initialised)
+ {
+ window.newcodemacro_initialised = true;
+ window.oldonloadmethod = window.onload;
+ window.onload = function(){
+ dp.SyntaxHighlighter.HighlightAll('newcodemacro');
+ if(window.oldonloadmethod)
+ {
+ window.oldonloadmethod();
+ }
+ }
+ }
+
+</script>
+</div>
+
+
+<h2><a name="apache-felix-ipojo-api-PrimitiveComponentTypebasics"></a>Primitive Component Type basics</h2>
+
+<p>When you create a new Primitive component type (so, using a Java
+class as implementation), you must set the bundle context and the class
+name. Everything else is optional. </p>
+
+<p>Note about inner classes: iPOJO is based on a bytecode manipulation.
+The API embeds the manipulator. So, when you initialize the component
+type, the specified class name is manipulated (if not already
+manipulated). So, as this force using a customized classloader, inner
+classes cannot be manipulated. So, inner class injection is not
+supported with the API.</p>
+
+<h2><a name="apache-felix-ipojo-api-ImmediateComponent,ValidateandInvalidateMethod"></a>Immediate Component, Validate and Invalidate Method</h2>
+<p>To set the component type as immediate, just call the <tt>setImmediate(immediate)</tt> method on the primitive component type object. <br>
+To set validate and invalidate methods, just call the <tt>setValidate(method)</tt> and <tt>setInvalidate(method)</tt>. Specify the method name that you want to call in argument. </p>
+
+<h2><a name="apache-felix-ipojo-api-Declaringservices"></a>Declaring services</h2>
+<p>To declare that a component provides a service, add a new service to your primitive component type.<br>
+The Service object can be configured. By default, it exposed every implemented interface (regular iPOJO behavior). So, you can:</p>
+<ul>
+ <li>Add service property</li>
+ <li>Set the creation strategy</li>
+ <li>Set the exposed service specifications</li>
+</ul>
+
+
+<div class="code">
+<div class="dp-highlighter"><table class="dp-c" border="0" cellpadding="0" cellspacing="0"><tbody><tr><td class="line1"><span>new PrimitiveComponentType() </span></td></tr><tr><td class="line2"> .setBundleContext(context) </td></tr><tr><td class="line1"> .setClassName(org.example.service.impl.MyComponentImpl.<span class="keyword">class</span><span>.getName()) </span></td></tr><tr><td class="line2"> .addService(new Service() </td></tr><tr><td class="line1"> .addProperty(new ServiceProperty() </td></tr><tr><td class="line2"> .setField(<span class="string">"myServiceProperty"</span><span>) </span></td></tr><tr><td class="line1"> .setName(<span class="string">"sample.myProperty"</span><span>)) </span></td></tr><tr><td class="line2"> .setCreationStrategy(Service.INSTANCE_STRATEGY)) </td></tr><tr><td class="line1"> .createInstance(); </td></tr></tbody></table></div><textarea style="display: none;" name="newcodemacro" class="java:nocontrols:nogutter" rows="10" readonly="readonly">new PrimitiveComponentType()
+ .setBundleContext(context)
+ .setClassName(org.example.service.impl.MyComponentImpl.class.getName())
+ .addService(new Service()
+ .addProperty(new ServiceProperty()
+ .setField("myServiceProperty")
+ .setName("sample.myProperty"))
+ .setCreationStrategy(Service.INSTANCE_STRATEGY))
+ .createInstance();</textarea>
+<script class="javascript">
+ if(!window.newcodemacro_initialised)
+ {
+ window.newcodemacro_initialised = true;
+ window.oldonloadmethod = window.onload;
+ window.onload = function(){
+ dp.SyntaxHighlighter.HighlightAll('newcodemacro');
+ if(window.oldonloadmethod)
+ {
+ window.oldonloadmethod();
+ }
+ }
+ }
+
+</script>
+</div>
+
+
+<h2><a name="apache-felix-ipojo-api-ServiceDependencies"></a>Service Dependencies</h2>
+<p>To declare a service dependency, create and add a Dependency object.
+The dependency object offers all the iPOJO service dependency features.
+You can set the injected field and/or bind/unbind methods. Here is an
+example:</p>
+<div class="code">
+<div class="dp-highlighter"><table class="dp-c" border="0" cellpadding="0" cellspacing="0"><tbody><tr><td class="line1"><span>new PrimitiveComponentType() </span></td></tr><tr><td class="line2"> .setBundleContext(context) </td></tr><tr><td class="line1"> .setClassName(org.example.service.impl.MyComponentImpl.<span class="keyword">class</span><span>.getName()) </span></td></tr><tr><td class="line2"> .addDependency( </td></tr><tr><td class="line1"> new Dependency().setField(<span class="string">"myFoo"</span><span>) </span></td></tr><tr><td class="line2"> .setOptional(<span class="keyword">true</span><span>) </span></td></tr><tr><td class="line1"> .setDefaultImplementation(<span class="string">"org.sample.FooDefaultImplementation"</span><span>) </span></td></tr><tr><td class="line2"> ) </td></tr><tr><td class="line1"> .createInstance(); </td></tr></tbody></table></div><textarea style="display: none;" name="newcodemacro" class="java:nocontrols:nogutter" rows="10" readonly="readonly">new PrimitiveComponentType()
+ .setBundleContext(context)
+ .setClassName(org.example.service.impl.MyComponentImpl.class.getName())
+ .addDependency(
+ new Dependency().setField("myFoo")
+ .setOptional(true)
+ .setDefaultImplementation("org.sample.FooDefaultImplementation")
+ )
+ .createInstance();</textarea>
+<script class="javascript">
+ if(!window.newcodemacro_initialised)
+ {
+ window.newcodemacro_initialised = true;
+ window.oldonloadmethod = window.onload;
+ window.onload = function(){
+ dp.SyntaxHighlighter.HighlightAll('newcodemacro');
+ if(window.oldonloadmethod)
+ {
+ window.oldonloadmethod();
+ }
+ }
+ }
+
+</script>
+</div>
+
+
+<h2><a name="apache-felix-ipojo-api-Properties"></a>Properties</h2>
+<p>Thanks to the <tt>addProperty</tt> method, you can create component properties. Here is some example of properties:</p>
+<div class="code">
+<div class="dp-highlighter"><table class="dp-c" border="0" cellpadding="0" cellspacing="0"><tbody><tr><td class="line1"><span>new PrimitiveComponentType() </span></td></tr><tr><td class="line2"> .setBundleContext(context) </td></tr><tr><td class="line1"> .setClassName(MyComponentImpl.<span class="keyword">class</span><span>.getName()) </span></td></tr><tr><td class="line2"> .addProperty(new Property() </td></tr><tr><td class="line1"> .setField(<span class="string">"myProperty"</span><span>) </span></td></tr><tr><td class="line2"> .setValue(<span class="string">"default-value"</span><span>) </span></td></tr><tr><td class="line1"> ) </td></tr><tr><td class="line2"> .addProperty(new Property() </td></tr><tr><td class="line1"> .setMethod(<span class="string">"setMethod"</span><span>) </span></td></tr><tr><td class="line2"> .setName(<span class="string">"prop"</span><span>) </span></td></tr><tr><td class="line1"> ) </td></tr><tr><td class="line2"> .createInstance(); </td></tr></tbody></table></div><textarea style="display: none;" name="newcodemacro" class="java:nocontrols:nogutter" rows="10" readonly="readonly">new PrimitiveComponentType()
+ .setBundleContext(context)
+ .setClassName(MyComponentImpl.class.getName())
+ .addProperty(new Property()
+ .setField("myProperty")
+ .setValue("default-value")
+ )
+ .addProperty(new Property()
+ .setMethod("setMethod")
+ .setName("prop")
+ )
+ .createInstance();</textarea>
+<script class="javascript">
+ if(!window.newcodemacro_initialised)
+ {
+ window.newcodemacro_initialised = true;
+ window.oldonloadmethod = window.onload;
+ window.onload = function(){
+ dp.SyntaxHighlighter.HighlightAll('newcodemacro');
+ if(window.oldonloadmethod)
+ {
+ window.oldonloadmethod();
+ }
+ }
+ }
+
+</script>
+</div>
+
+
+<h2><a name="apache-felix-ipojo-api-TemporalDependencies"></a>Temporal Dependencies</h2>
+<p>Temporal dependencies are also supported: </p>
+<div class="code">
+<div class="dp-highlighter"><table class="dp-c" border="0" cellpadding="0" cellspacing="0"><tbody><tr><td class="line1"><span>new PrimitiveComponentType() </span></td></tr><tr><td class="line2"> .setBundleContext(context) </td></tr><tr><td class="line1"> .setClassName(MyComponentImpl.<span class="keyword">class</span><span>.getName()) </span></td></tr><tr><td class="line2"> .addDependency( </td></tr><tr><td class="line1"> new TemporalDependency().setField(<span class="string">"myFoo"</span><span>) </span></td></tr><tr><td class="line2"> .setOnTimeoutPolicy(TemporalDependency.NULLABLE) </td></tr><tr><td class="line1"> .setTimeout(3000) </td></tr><tr><td class="line2"> .setProxy(<span class="keyword">true</span><span>) </span></td></tr><tr><td class="line1"> ) </td></tr><tr><td class="line2"> .createInstance(); </td></tr></tbody></table></div><textarea style="display: none;" name="newcodemacro" class="java:nocontrols:nogutter" rows="10" readonly="readonly">new PrimitiveComponentType()
+ .setBundleContext(context)
+ .setClassName(MyComponentImpl.class.getName())
+ .addDependency(
+ new TemporalDependency().setField("myFoo")
+ .setOnTimeoutPolicy(TemporalDependency.NULLABLE)
+ .setTimeout(3000)
+ .setProxy(true)
+ )
+ .createInstance();</textarea>
+<script class="javascript">
+ if(!window.newcodemacro_initialised)
+ {
+ window.newcodemacro_initialised = true;
+ window.oldonloadmethod = window.onload;
+ window.onload = function(){
+ dp.SyntaxHighlighter.HighlightAll('newcodemacro');
+ if(window.oldonloadmethod)
+ {
+ window.oldonloadmethod();
+ }
+ }
+ }
+
+</script>
+</div>
+
+
+<h2><a name="apache-felix-ipojo-api-Instancecreation"></a>Instance creation</h2>
+<p>The API allows you to create instances from the component type you described. Three differents methods.<br>
+The <tt>createInstance()</tt> method just creates an instance. The <tt>createInstance(String name)</tt> method allows to set the instance name. Finally, the <tt>createInstance(Dictionary configuration)</tt>
+allows setting the instance configuration. All those methods returns
+the ComponentInstance object allowing to manage the instance (stop,
+start, dispose). </p>
+
+<h2><a name="apache-felix-ipojo-api-ManagedServiceandPropagation"></a>Managed Service and Propagation</h2>
+<p>You can enable/disable the property propagation thanks to the <tt>setPropagation</tt> method on the PrimitiveComponentType object. <br>
+You can also set the the managed service PID with the <tt>setManagedServicePID</tt>
+method. This method should be only use to give a default value of for
+singleton component. In all other case, the managed service pid has to
+be provided inside the instance configuration.</p>
+
+<h2><a name="apache-felix-ipojo-api-ManagingiPOJOFactory"></a>Managing iPOJO Factory</h2>
+<p>Beyond the PrimitiveComponentType, an iPOJO factory is hidden. You can configure this factory to be public or private with the <tt>setPublic</tt> method. You can also set the name of the factory with the <tt>setName</tt> method. </p>
+
+<p>Then, you can access to the Factory object by calling the <tt>getFactory</tt> method.</p>
+
+<h2><a name="apache-felix-ipojo-api-AccesstotheintrospectionAPI"></a>Access to the introspection API</h2>
+<p>The API provides bridge to get access to the iPOJO introspection
+API. The introspection API allows reconfiguring at runtime an instance
+(properties, service dependencies...). From Service and Dependency,
+Property and ServiceProperty objects, call the <tt>getXXXDescription</tt>
+method. You must give the instance that you want to introspect in
+argument. If the lookup success, you get an object allowing
+reconfiguring the service, dependency or property. </p>
+
+<h2><a name="apache-felix-ipojo-api-SingletonComponentType"></a>Singleton Component Type</h2>
+<p>If you are sure to create only one instance of your component type,
+you can use the singleton component type class. This is a kind of
+primitive component type, but when you start it (with the <tt>create</tt> method), it will automatically create an instance.</p>
+<div class="code">
+<div class="dp-highlighter"><table class="dp-c" border="0" cellpadding="0" cellspacing="0"><tbody><tr><td class="line1"><span>PrimitiveComponentType type = new SingletonComponentType() </span></td></tr><tr><td class="line2"> .setBundleContext(context) </td></tr><tr><td class="line1"> .setClassName(org.example.service.impl.MyComponentImpl.<span class="keyword">class</span><span>.getName()) </span></td></tr><tr><td class="line2"> .addDependency(new Dependency().setField(<span class="string">"myFoo"</span><span>)) </span></td></tr><tr><td class="line1"> .setValidateMethod(<span class="string">"start"</span><span>); </span></td></tr><tr><td class="line2"> </td></tr><tr><td class="line1"> ((SingletonComponentType) type) </td></tr><tr><td class="line2"> .setObject(new MyComponentImpl(5)) <span class="comment">// Inject a pojo object</span><span> </span></td></tr><tr><td class="line1"> .create();<span class="comment">// Create an instance</span><span> </span></td></tr></tbody></table></div><textarea style="display: none;" name="newcodemacro" class="java:nocontrols:nogutter" rows="10" readonly="readonly">PrimitiveComponentType type = new SingletonComponentType()
+ .setBundleContext(context)
+ .setClassName(org.example.service.impl.MyComponentImpl.class.getName())
+ .addDependency(new Dependency().setField("myFoo"))
+ .setValidateMethod("start");
+
+ ((SingletonComponentType) type)
+ .setObject(new MyComponentImpl(5)) // Inject a pojo object
+ .create();// Create an instance</textarea>
+<script class="javascript">
+ if(!window.newcodemacro_initialised)
+ {
+ window.newcodemacro_initialised = true;
+ window.oldonloadmethod = window.onload;
+ window.onload = function(){
+ dp.SyntaxHighlighter.HighlightAll('newcodemacro');
+ if(window.oldonloadmethod)
+ {
+ window.oldonloadmethod();
+ }
+ }
+ }
+
+</script>
+</div>
+
+
+<p>The type created with the singleton component type are set to <tt>private</tt> by default. Instead of calling the <tt>start</tt> method, you have to call one of the <tt>create</tt> methods to start the type and create the instance.</p>
+
+<p>You can also set the contained POJO object by using the <tt>setObject</tt> method. The given object MUST be compatible with the component implementation class.</p>
+
+<h2><a name="apache-felix-ipojo-api-Usingexternalhandlers"></a>Using external handlers</h2>
+<p>iPOJO is extensible... So, it makes sense that the API is also
+extensible. So component type provides a method allowing to add
+external handler configuration:</p>
+<div class="code">
+<div class="dp-highlighter"><table class="dp-c" border="0" cellpadding="0" cellspacing="0"><tbody><tr><td class="line1"><span></span><span class="keyword">return</span><span> new PrimitiveComponentType() </span></td></tr><tr><td class="line2"> .setBundleContext(context) </td></tr><tr><td class="line1"> .setClassName(HostImpl.<span class="keyword">class</span><span>.getName()) </span></td></tr><tr><td class="line2"> .addHandler(new Whiteboard() </td></tr><tr><td class="line1"> .onArrival(<span class="string">"arrival"</span><span>) </span></td></tr><tr><td class="line2"> .onDeparture(<span class="string">"departure"</span><span>) </span></td></tr><tr><td class="line1"> .setFilter(<span class="string">"(foo=foo)"</span><span>) </span></td></tr><tr><td class="line2"> ); </td></tr></tbody></table></div><textarea style="display: none;" name="newcodemacro" class="java:nocontrols:nogutter" rows="10" readonly="readonly">return new PrimitiveComponentType()
+ .setBundleContext(context)
+ .setClassName(HostImpl.class.getName())
+ .addHandler(new Whiteboard()
+ .onArrival("arrival")
+ .onDeparture("departure")
+ .setFilter("(foo=foo)")
+ );</textarea>
+<script class="javascript">
+ if(!window.newcodemacro_initialised)
+ {
+ window.newcodemacro_initialised = true;
+ window.oldonloadmethod = window.onload;
+ window.onload = function(){
+ dp.SyntaxHighlighter.HighlightAll('newcodemacro');
+ if(window.oldonloadmethod)
+ {
+ window.oldonloadmethod();
+ }
+ }
+ }
+
+</script>
+</div>
+
+
+<p>The <tt>addHandler</tt> method allows you to add any handler description. A handler description is an object of a class implementing <tt>org.apache.felix.ipojo.api.HandlerConfiguration</tt>. Handler provider willing to support the API have to provide this class. For example, the example above uses <tt>Whiteboard</tt> that is the Whiteboard pattern handler description. This class is very simple, and is shown below:</p>
+<div class="code">
+<div class="dp-highlighter"><table class="dp-c" border="0" cellpadding="0" cellspacing="0"><tbody><tr><td class="line1"><span></span><span class="keyword">public</span><span> </span><span class="keyword">class</span><span> Whiteboard </span><span class="keyword">implements</span><span> HandlerConfiguration { </span></td></tr><tr><td class="line2"> </td></tr><tr><td class="line1"> <span class="keyword">public</span><span> </span><span class="keyword">static</span><span> </span><span class="keyword">final</span><span> String NAME = </span><span class="string">"wbp"</span><span>; </span></td></tr><tr><td class="line2"> </td></tr><tr><td class="line1"> <span class="keyword">public</span><span> </span><span class="keyword">static</span><span> </span><span class="keyword">final</span><span> String NAMESPACE = </span><span class="string">"org.apache.felix.ipojo.whiteboard"</span><span>; </span></td></tr><tr><td class="line2"> </td></tr><tr><td class="line1"> <span class="keyword">private</span><span> String arrival; </span></td></tr><tr><td class="line2"> </td></tr><tr><td class="line1"> <span class="keyword">private</span><span> String departure; </span></td></tr><tr><td class="line2"> </td></tr><tr><td class="line1"> <span class="keyword">private</span><span> String modification; </span></td></tr><tr><td class="line2"> </td></tr><tr><td class="line1"> <span class="keyword">private</span><span> String filter; </span></td></tr><tr><td class="line2"> </td></tr><tr><td class="line1"> <span class="keyword">public</span><span> Whiteboard onArrival(String method) { </span></td></tr><tr><td class="line2"> arrival = method; </td></tr><tr><td class="line1"> <span class="keyword">return</span><span> </span><span class="keyword">this</span><span>; </span></td></tr><tr><td class="line2"> } </td></tr><tr><td class="line1"> </td></tr><tr><td class="line2"> <span class="keyword">public</span><span> Whiteboard onDeparture(String method) { </span></td></tr><tr><td class="line1"> departure = method; </td></tr><tr><td class="line2"> <span class="keyword">return</span><span> </span><span class="keyword">this</span><span>; </span></td></tr><tr><td class="line1"> } </td></tr><tr><td class="line2"> </td></tr><tr><td class="line1"> <span class="keyword">public</span><span> Whiteboard onModification(String method) { </span></td></tr><tr><td class="line2"> modification = method; </td></tr><tr><td class="line1"> <span class="keyword">return</span><span> </span><span class="keyword">this</span><span>; </span></td></tr><tr><td class="line2"> } </td></tr><tr><td class="line1"> </td></tr><tr><td class="line2"> <span class="keyword">public</span><span> Whiteboard setFilter(String fil) { </span></td></tr><tr><td class="line1"> filter = fil; </td></tr><tr><td class="line2"> <span class="keyword">return</span><span> </span><span class="keyword">this</span><span>; </span></td></tr><tr><td class="line1"> } </td></tr><tr><td class="line2"> </td></tr><tr><td class="line1"> <span class="keyword">public</span><span> Element getElement() { </span></td></tr><tr><td class="line2"> ensureValidity(); </td></tr><tr><td class="line1"> <span class="comment">// Create the root element.</span><span> </span></td></tr><tr><td class="line2"> Element element = new Element(NAME, NAMESPACE); </td></tr><tr><td class="line1"> <span class="comment">// Mandatory attributes</span><span> </span></td></tr><tr><td class="line2"> element.addAttribute(new Attribute(<span class="string">"onArrival"</span><span>, arrival)); </span></td></tr><tr><td class="line1"> element.addAttribute(new Attribute(<span class="string">"onDeparture"</span><span>, departure)); </span></td></tr><tr><td class="line2"> element.addAttribute(new Attribute(<span class="string">"filter"</span><span>, filter)); </span></td></tr><tr><td class="line1"> </td></tr><tr><td class="line2"> <span class="comment">// Optional attribute</span><span> </span></td></tr><tr><td class="line1"> <span class="keyword">if</span><span> (modification != </span><span class="keyword">null</span><span>) { </span></td></tr><tr><td class="line2"> element.addAttribute(new Attribute(<span class="string">"onModification"</span><span>, modification)); </span></td></tr><tr><td class="line1"> } </td></tr><tr><td class="line2"> </td></tr><tr><td class="line1"> <span class="keyword">return</span><span> element; </span></td></tr><tr><td class="line2"> } </td></tr><tr><td class="line1"> </td></tr><tr><td class="line2"> <span class="keyword">private</span><span> </span><span class="keyword">void</span><span> ensureValidity() { </span></td></tr><tr><td class="line1"> <span class="keyword">if</span><span> (arrival == </span><span class="keyword">null</span><span>) { </span></td></tr><tr><td class="line2"> <span class="keyword">throw</span><span> new IllegalStateException(</span><span class="string">"The whiteboard pattern configuration must have a onArrival method"</span><span>); </span></td></tr><tr><td class="line1"> } </td></tr><tr><td class="line2"> <span class="keyword">if</span><span> (departure == </span><span class="keyword">null</span><span>) { </span></td></tr><tr><td class="line1"> <span class="keyword">throw</span><span> new IllegalStateException(</span><span class="string">"The whiteboard pattern configuration must have a onDeparture method"</span><span>); </span></td></tr><tr><td class="line2"> } </td></tr><tr><td class="line1"> <span class="keyword">if</span><span> (filter == </span><span class="keyword">null</span><span>) { </span></td></tr><tr><td class="line2"> <span class="keyword">throw</span><span> new IllegalStateException(</span><span class="string">"The whiteboard pattern configuration must have a filter"</span><span>); </span></td></tr><tr><td class="line1"> } </td></tr><tr><td class="line2"> </td></tr><tr><td class="line1"> } </td></tr></tbody></table></div><textarea style="display: none;" name="newcodemacro" class="java:nocontrols:nogutter" rows="10" readonly="readonly">public class Whiteboard implements HandlerConfiguration {
+
+ public static final String NAME = "wbp";
+
+ public static final String NAMESPACE = "org.apache.felix.ipojo.whiteboard";
+
+ private String arrival;
+
+ private String departure;
+
+ private String modification;
+
+ private String filter;
+
+ public Whiteboard onArrival(String method) {
+ arrival = method;
+ return this;
+ }
+
+ public Whiteboard onDeparture(String method) {
+ departure = method;
+ return this;
+ }
+
+ public Whiteboard onModification(String method) {
+ modification = method;
+ return this;
+ }
+
+ public Whiteboard setFilter(String fil) {
+ filter = fil;
+ return this;
+ }
+
+ public Element getElement() {
+ ensureValidity();
+ // Create the root element.
+ Element element = new Element(NAME, NAMESPACE);
+ // Mandatory attributes
+ element.addAttribute(new Attribute("onArrival", arrival));
+ element.addAttribute(new Attribute("onDeparture", departure));
+ element.addAttribute(new Attribute("filter", filter));
+
+ // Optional attribute
+ if (modification != null) {
+ element.addAttribute(new Attribute("onModification", modification));
+ }
+
+ return element;
+ }
+
+ private void ensureValidity() {
+ if (arrival == null) {
+ throw new IllegalStateException("The whiteboard pattern configuration must have a onArrival method");
+ }
+ if (departure == null) {
+ throw new IllegalStateException("The whiteboard pattern configuration must have a onDeparture method");
+ }
+ if (filter == null) {
+ throw new IllegalStateException("The whiteboard pattern configuration must have a filter");
+ }
+
+ }</textarea>
+<script class="javascript">
+ if(!window.newcodemacro_initialised)
+ {
+ window.newcodemacro_initialised = true;
+ window.oldonloadmethod = window.onload;
+ window.onload = function(){
+ dp.SyntaxHighlighter.HighlightAll('newcodemacro');
+ if(window.oldonloadmethod)
+ {
+ window.oldonloadmethod();
+ }
+ }
+ }
+
+</script>
+</div>
+
+
+<p>The only required method is <tt>getElement</tt> returning the
+Element-Attribute structure representing the handler configuration
+(this uses the internal iPOJO data format). If the metadata cannot be
+generated, the class throws IllegalStateExceptions.</p>
+
+<h2><a name="apache-felix-ipojo-api-CreatingcompositionwiththeAPI"></a>Creating composition with the API</h2>
+<p>The API also allows you to create iPOJO compositions in a pretty simple way. So you can create compositions:</p>
+<ul>
+ <li>containing internal instances</li>
+ <li>importing services</li>
+ <li>instantiating sub-services</li>
+ <li>exporting services</li>
+ <li>providing services (by delegation)</li>
+</ul>
+
+
+<p>Here are some examples:</p>
+<div class="code">
+<div class="dp-highlighter"><table class="dp-c" border="0" cellpadding="0" cellspacing="0"><tbody><tr><td class="line1"><span>PrimitiveComponentType prov = createAProvider(); </span><span class="comment">// Create a primitive type</span><span> </span></td></tr><tr><td class="line2"> PrimitiveComponentType cons = createAConsumer(); <span class="comment">// Create another primitive type</span><span> </span></td></tr><tr><td class="line1"> </td></tr><tr><td class="line2"> CompositeComponentType type = new CompositeComponentType() </td></tr><tr><td class="line1"> .setBundleContext(context) </td></tr><tr><td class="line2"> .setComponentTypeName(<span class="string">"comp1"</span><span>) </span></td></tr><tr><td class="line1"> .addInstance(new Instance(prov.getFactory().getName())) <span class="comment">// Create an instance in the composite</span><span> </span></td></tr><tr><td class="line2"> .addInstance(new Instance(cons.getFactory().getName())); </td></tr><tr><td class="line1"> </td></tr><tr><td class="line2"> ComponentInstance ci = type.createInstance(); </td></tr></tbody></table></div><textarea style="display: none;" name="newcodemacro" class="java:nocontrols:nogutter" rows="10" readonly="readonly">PrimitiveComponentType prov = createAProvider(); // Create a primitive type
+ PrimitiveComponentType cons = createAConsumer(); // Create another primitive type
+
+ CompositeComponentType type = new CompositeComponentType()
+ .setBundleContext(context)
+ .setComponentTypeName("comp1")
+ .addInstance(new Instance(prov.getFactory().getName())) // Create an instance in the composite
+ .addInstance(new Instance(cons.getFactory().getName()));
+
+ ComponentInstance ci = type.createInstance();</textarea>
+<script class="javascript">
+ if(!window.newcodemacro_initialised)
+ {
+ window.newcodemacro_initialised = true;
+ window.oldonloadmethod = window.onload;
+ window.onload = function(){
+ dp.SyntaxHighlighter.HighlightAll('newcodemacro');
+ if(window.oldonloadmethod)
+ {
+ window.oldonloadmethod();
+ }
+ }
+ }
+
+</script>
+</div>
+
+<div class="code">
+<div class="dp-highlighter"><table class="dp-c" border="0" cellpadding="0" cellspacing="0"><tbody><tr><td class="line1"><span>CompositeComponentType type = new CompositeComponentType() </span></td></tr><tr><td class="line2"> .setBundleContext(context) </td></tr><tr><td class="line1"> .setComponentTypeName(<span class="string">"comp3"</span><span>) </span></td></tr><tr><td class="line2"> .addSubService(new InstantiatedService() <span class="comment">// Importation</span><span> </span></td></tr><tr><td class="line1"> .setSpecification(Foo.<span class="keyword">class</span><span>.getName()) </span></td></tr><tr><td class="line2"> .setOptional(<span class="keyword">true</span><span>)); </span></td></tr></tbody></table></div><textarea style="display: none;" name="newcodemacro" class="java:nocontrols:nogutter" rows="10" readonly="readonly">CompositeComponentType type = new CompositeComponentType()
+ .setBundleContext(context)
+ .setComponentTypeName("comp3")
+ .addSubService(new InstantiatedService() // Importation
+ .setSpecification(Foo.class.getName())
+ .setOptional(true));</textarea>
+<script class="javascript">
+ if(!window.newcodemacro_initialised)
+ {
+ window.newcodemacro_initialised = true;
+ window.oldonloadmethod = window.onload;
+ window.onload = function(){
+ dp.SyntaxHighlighter.HighlightAll('newcodemacro');
+ if(window.oldonloadmethod)
+ {
+ window.oldonloadmethod();
+ }
+ }
+ }
+
+</script>
+</div>
+
+<div class="code">
+<div class="dp-highlighter"><table class="dp-c" border="0" cellpadding="0" cellspacing="0"><tbody><tr><td class="line1"><span>CompositeComponentType type = new CompositeComponentType() </span></td></tr><tr><td class="line2"> .setBundleContext(context) </td></tr><tr><td class="line1"> .setComponentTypeName(<span class="string">"comp2"</span><span>) </span></td></tr><tr><td class="line2"> .addSubService(new InstantiatedService() <span class="comment">// Instantiated service</span><span> </span></td></tr><tr><td class="line1"> .setSpecification(Foo.<span class="keyword">class</span><span>.getName())) </span></td></tr><tr><td class="line2"> .addInstance(new Instance(cons.getFactory().getName())); </td></tr></tbody></table></div><textarea style="display: none;" name="newcodemacro" class="java:nocontrols:nogutter" rows="10" readonly="readonly">CompositeComponentType type = new CompositeComponentType()
+ .setBundleContext(context)
+ .setComponentTypeName("comp2")
+ .addSubService(new InstantiatedService() // Instantiated service
+ .setSpecification(Foo.class.getName()))
+ .addInstance(new Instance(cons.getFactory().getName()));</textarea>
+<script class="javascript">
+ if(!window.newcodemacro_initialised)
+ {
+ window.newcodemacro_initialised = true;
+ window.oldonloadmethod = window.onload;
+ window.onload = function(){
+ dp.SyntaxHighlighter.HighlightAll('newcodemacro');
+ if(window.oldonloadmethod)
+ {
+ window.oldonloadmethod();
+ }
+ }
+ }
+
+</script>
+</div>
+
+<div class="code">
+<div class="dp-highlighter"><table class="dp-c" border="0" cellpadding="0" cellspacing="0"><tbody><tr><td class="line1"><span>CompositeComponentType type = new CompositeComponentType() </span></td></tr><tr><td class="line2"> .setBundleContext(context) </td></tr><tr><td class="line1"> .setComponentTypeName(<span class="string">"compExport"</span><span>) </span></td></tr><tr><td class="line2"> .addSubService(new InstantiatedService().setSpecification(Foo.<span class="keyword">class</span><span>.getName())) </span></td></tr><tr><td class="line1"> .addService(new ExportedService() </td></tr><tr><td class="line2"> .setSpecification(Foo.<span class="keyword">class</span><span>.getName())); </span><span class="comment">// Exports a service</span><span> </span></td></tr></tbody></table></div><textarea style="display: none;" name="newcodemacro" class="java:nocontrols:nogutter" rows="10" readonly="readonly">CompositeComponentType type = new CompositeComponentType()
+ .setBundleContext(context)
+ .setComponentTypeName("compExport")
+ .addSubService(new InstantiatedService().setSpecification(Foo.class.getName()))
+ .addService(new ExportedService()
+ .setSpecification(Foo.class.getName())); // Exports a service</textarea>
+<script class="javascript">
+ if(!window.newcodemacro_initialised)
+ {
+ window.newcodemacro_initialised = true;
+ window.oldonloadmethod = window.onload;
+ window.onload = function(){
+ dp.SyntaxHighlighter.HighlightAll('newcodemacro');
+ if(window.oldonloadmethod)
+ {
+ window.oldonloadmethod();
+ }
+ }
+ }
+
+</script>
+</div>
+
+<p><br clear="all"></p>
+
+ </div>
+ <img src="apache-felix-ipojo-api_files/footer.png" class="footer">
+</div>
+
+<script type="text/javascript">
+var gaJsHost = (("https:" == document.location.protocol) ? "https://ssl." : "http://www.");
+document.write(unescape("%3Cscript src='" + gaJsHost + "google-analytics.com/ga.js' type='text/javascript'%3E%3C/script%3E"));
+</script><script src="apache-felix-ipojo-api_files/ga.js" type="text/javascript"></script>
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+var pageTracker = _gat._getTracker("UA-1518442-4");
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