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gerrit.onosproject.org / onos-felix / 373a57d8c50f05e872ed874a0f5e42d99cb7a35c / . / ipojo / handler / jmx / doc / ipojo-jmx-handler.html
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Clement Escoffier83507512008-10-13 07:33:03 +0000[diff] [blame]1<!DOCTYPE HTML PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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Clement Escoffier83507512008-10-13 07:33:03 +0000[diff] [blame]5
Clement Escoffier8251f602009-01-15 15:35:17 +0000[diff] [blame]6 <title>Apache Felix - iPOJO JMX Handler</title>
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Clement Escoffier83507512008-10-13 07:33:03 +0000[diff] [blame]183
Clement Escoffier8251f602009-01-15 15:35:17 +0000[diff] [blame]184<h1><a name="iPOJOJMXHandler-iPOJOJMXHandler"></a>iPOJO JMX Handler</h1>
Clement Escoffier83507512008-10-13 07:33:03 +0000[diff] [blame]185
Clement Escoffier373a57d2009-07-21 12:06:46 +0000[diff] [blame^]186<p><em>This handler provides JMX management of component instance. It
187could be useful to manage instance remotely. As the handler exposes
188MBeans, you must have a MBean server running on your platform (as the
189platform MBean server or the MOSGi MBean Server).</em></p>
190
191<div class="toc">
192<ul>
193 <li><a href="#iPOJOJMXHandler-Features">Features</a></li>
194 <li><a href="#iPOJOJMXHandler-Prerequisites">Prerequisites</a></li>
195 <li><a href="#iPOJOJMXHandler-Download">Download</a></li>
196 <li><a href="#iPOJOJMXHandler-Howtouseit">How to use it</a></li>
197 <li><a href="#iPOJOJMXHandler-JMXHandleroptions">JMX Handler options</a></li>
198 <li><a href="#iPOJOJMXHandler-Globalhandlerattributes">Global handler attributes</a></li>
199 <li><a href="#iPOJOJMXHandler-Propertiesattributes">Properties attributes</a></li>
200 <li><a href="#iPOJOJMXHandler-Methodsattributes">Methods attributes</a></li>
201 <li><a href="#iPOJOJMXHandler-Examples">Examples</a></li>
202<ul>
203 <li><a href="#iPOJOJMXHandler-ExposingAttributes">Exposing Attributes</a></li>
204 <li><a href="#iPOJOJMXHandler-ExposingMethods">Exposing Methods</a></li>
205 <li><a href="#iPOJOJMXHandler-AttributeNotifications%253A">Attribute Notifications:</a></li>
206</ul>
207 <li><a href="#iPOJOJMXHandler-Configuringthehandlerwithannotations">Configuring the handler with annotations</a></li>
208</ul></div>
Clement Escoffier83507512008-10-13 07:33:03 +0000[diff] [blame]209
Clement Escoffier8251f602009-01-15 15:35:17 +0000[diff] [blame]210<h2><a name="iPOJOJMXHandler-Features"></a>Features</h2>
Clement Escoffier83507512008-10-13 07:33:03 +0000[diff] [blame]211
Clement Escoffier8251f602009-01-15 15:35:17 +0000[diff] [blame]212<p>The handler allows to:</p>
213<ul>
214 <li>Expose attributes accessible via JMX (with rights management).</li>
215 <li>Expose methods to be called through JMX.</li>
216 <li>Get notifications when attributes are modified .</li>
217</ul>
Clement Escoffier83507512008-10-13 07:33:03 +0000[diff] [blame]218
219
Clement Escoffier8251f602009-01-15 15:35:17 +0000[diff] [blame]220<h2><a name="iPOJOJMXHandler-Prerequisites"></a>Prerequisites</h2>
Clement Escoffier83507512008-10-13 07:33:03 +0000[diff] [blame]221
Clement Escoffier8251f602009-01-15 15:35:17 +0000[diff] [blame]222<p>To be functional this handler must register on an MBean Server,thus
223you obviously need it. Several servers are currently supported : the
224standard platform MBean server (included in the JDK), MOSGi (provided
225with Felix), ...<br>
226To use MOSGi, you have to deploy at least the following three bundles of MOSGi:</p>
227<ul>
228 <li>org.apache.felix.mosgi.jmx.agent</li>
229 <li>org.apache.felix.mosgi.jmx.registry</li>
230 <li>org.apache.felix.mosgi.jmx.rmiconnector</li>
231</ul>
Clement Escoffier83507512008-10-13 07:33:03 +0000[diff] [blame]232
233
Clement Escoffier373a57d2009-07-21 12:06:46 +0000[diff] [blame^]234<p>You can find MOSGi documentation on <a href="http://cwiki.apache.org/FELIX/mosgi-managed-osgi-framework.html" rel="nofollow">http://cwiki.apache.org/FELIX/mosgi-managed-osgi-framework.html</a></p>
Clement Escoffier83507512008-10-13 07:33:03 +0000[diff] [blame]235
Clement Escoffier8251f602009-01-15 15:35:17 +0000[diff] [blame]236<h2><a name="iPOJOJMXHandler-Download"></a>Download</h2>
Clement Escoffier83507512008-10-13 07:33:03 +0000[diff] [blame]237
Clement Escoffier8251f602009-01-15 15:35:17 +0000[diff] [blame]238<p>The JMX handler is available in the Felix trunk in the iPOJO project. See the <a href="http://felix.apache.org/site/download.html" title="Download">Download</a> page to download and compile these sources.</p>
Clement Escoffier83507512008-10-13 07:33:03 +0000[diff] [blame]239
Clement Escoffier8251f602009-01-15 15:35:17 +0000[diff] [blame]240<h2><a name="iPOJOJMXHandler-Howtouseit"></a>How to use it</h2>
Clement Escoffier83507512008-10-13 07:33:03 +0000[diff] [blame]241
Clement Escoffier8251f602009-01-15 15:35:17 +0000[diff] [blame]242<p>The handler needs to be added in the metadata.xml, you just add a namespace (e.g., jmx) :</p>
Clement Escoffier373a57d2009-07-21 12:06:46 +0000[diff] [blame^]243<div class="code">
244<div class="dp-highlighter"><table class="dp-xml" border="0" cellpadding="0" cellspacing="0"><tbody><tr><td class="line1"><span></span><span class="tag">&lt;</span><span>ipojo&nbsp;xmlns:</span><span class="attribute">jmx</span><span>=</span><span class="attribute-value">"org.apache.felix.ipojo.handlers.jmx"</span><span>&gt;&nbsp;</span></td></tr><tr><td class="line2">&nbsp;&nbsp;&nbsp;&nbsp;...&nbsp;</td></tr><tr><td class="line1"><span class="tag">&lt;/</span><span>ipojo</span><span class="tag">&gt;</span><span>&nbsp;</span></td></tr></tbody></table></div><textarea style="display: none;" name="newcodemacro" class="xml:nocontrols:nogutter" rows="10" readonly="readonly">&lt;ipojo xmlns:jmx="org.apache.felix.ipojo.handlers.jmx"&gt;
Clement Escoffier83507512008-10-13 07:33:03 +0000[diff] [blame]245 ...
Clement Escoffier373a57d2009-07-21 12:06:46 +0000[diff] [blame^]246&lt;/ipojo&gt;</textarea>
247<script class="javascript">
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263
Clement Escoffier8251f602009-01-15 15:35:17 +0000[diff] [blame]264<p>So, you could now expose in JMX properties and methods of your component. They are surrounded by the &lt;jmx:config&gt;<br>
265tag.</p>
Clement Escoffier373a57d2009-07-21 12:06:46 +0000[diff] [blame^]266<div class="code">
267<div class="dp-highlighter"><table class="dp-xml" border="0" cellpadding="0" cellspacing="0"><tbody><tr><td class="line1"><span></span><span class="tag">&lt;</span><span>jmx:config</span><span class="tag">&gt;</span><span>&nbsp;</span></td></tr><tr><td class="line2">&nbsp;&nbsp;&nbsp;&nbsp;<span class="tag">&lt;</span><span>jmx:property&nbsp;</span><span class="attribute">name</span><span>=</span><span class="attribute-value">"message"</span><span>&nbsp;</span><span class="attribute">field</span><span>=</span><span class="attribute-value">"m_msg"</span><span>&nbsp;</span><span class="attribute">rights</span><span>=</span><span class="attribute-value">"w"</span><span>&nbsp;</span><span class="attribute">notification</span><span>=</span><span class="attribute-value">"true"</span><span>/&gt;&nbsp;</span></td></tr><tr><td class="line1">&nbsp;&nbsp;&nbsp;&nbsp;<span class="tag">&lt;</span><span>jmx:method&nbsp;</span><span class="attribute">name</span><span>=</span><span class="attribute-value">"doSomethingBad"</span><span>/&gt;&nbsp;</span></td></tr><tr><td class="line2">&nbsp;&nbsp;&nbsp;&nbsp;<span class="tag">&lt;</span><span>jmx:method&nbsp;</span><span class="attribute">name</span><span>=</span><span class="attribute-value">"doSomethingGood"</span><span>/&gt;&nbsp;</span></td></tr><tr><td class="line1"><span class="tag">&lt;/</span><span>jmx:config</span><span class="tag">&gt;</span><span>&nbsp;</span></td></tr></tbody></table></div><textarea style="display: none;" name="newcodemacro" class="xml:nocontrols:nogutter" rows="10" readonly="readonly">&lt;jmx:config&gt;
268 &lt;jmx:property name="message" field="m_msg" rights="w" notification="true"/&gt;
269 &lt;jmx:method name="doSomethingBad"/&gt;
270 &lt;jmx:method name="doSomethingGood"/&gt;
271&lt;/jmx:config&gt;</textarea>
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289<div class="panelMacro"><table class="infoMacro"><colgroup><col width="24"><col></colgroup><tbody><tr><td valign="top"><img src="ipojo-jmx-handler_files/information.gif" alt="" border="0" align="absmiddle" height="16" width="16"></td><td><b>Serialization</b><br><p>Be
290careful that the argument and return type of methods must be
291serializable. In case of several methods have the same name, each of
292them will be exposed.</p></td></tr></tbody></table></div>
Clement Escoffier83507512008-10-13 07:33:03 +0000[diff] [blame]293
Clement Escoffier8251f602009-01-15 15:35:17 +0000[diff] [blame]294<h2><a name="iPOJOJMXHandler-JMXHandleroptions"></a>JMX Handler options</h2>
Clement Escoffier83507512008-10-13 07:33:03 +0000[diff] [blame]295
Clement Escoffier8251f602009-01-15 15:35:17 +0000[diff] [blame]296<p>Here you can find all configuration options of the JMX handler.
297There are two kinds of manageable elements : properties and methods.
298First is described the global configuration of the handler. Then
299elements can be configured, using several attributes, as described
300below.</p>
Clement Escoffier83507512008-10-13 07:33:03 +0000[diff] [blame]301
Clement Escoffier8251f602009-01-15 15:35:17 +0000[diff] [blame]302<h2><a name="iPOJOJMXHandler-Globalhandlerattributes"></a>Global handler attributes</h2>
Clement Escoffier373a57d2009-07-21 12:06:46 +0000[diff] [blame^]303<div class="borderedTable"><table class="confluenceTable"><tbody>
Clement Escoffier8251f602009-01-15 15:35:17 +0000[diff] [blame]304<tr>
305<th class="confluenceTh">Attribute name </th>
306<th class="confluenceTh"> Required </th>
307<th class="confluenceTh"> Description</th>
308</tr>
309<tr>
310<td class="confluenceTd">objectName</td>
311<td class="confluenceTd">NO</td>
312<td class="confluenceTd">The complete object name of the managed
313component. The syntax of this attribute must be compliant with the
314ObjectName syntax, detailed in the JMX specification.<br>
315If neither domain nor name attributes are specified, the default value
316is determined by the package, the type and the instance name of the
317component. This attribute overrides the domain and name attributes.<br>
318<em>Example:</em> "my.domain:type=myType,name=myName"</td>
319</tr>
320<tr>
321<td class="confluenceTd">domain</td>
322<td class="confluenceTd">NO</td>
323<td class="confluenceTd">The domain of the managed object (i.e., the
324left part of the object name). This attribute must be compliant with
325the domain syntax, as described in the JMX specification.<br>
326<em>Example:</em> "my.domain"</td>
327</tr>
328<tr>
329<td class="confluenceTd">name</td>
330<td class="confluenceTd">NO</td>
331<td class="confluenceTd">The name property of the managed object. The
332value of this attribute must comply with the ObjectName value syntax,
333as described in the JMX specification.</td>
334</tr>
335<tr>
336<td class="confluenceTd">usesMOSGi</td>
337<td class="confluenceTd">NO</td>
338<td class="confluenceTd">Determines if the component must be register on the MOSGi MBean server or not.</td>
339</tr>
340<tr>
341<td class="confluenceTd">preRegister <br>
342postRegister <br>
343preDeregister<br>
344postDeregister</td>
345<td class="confluenceTd">NO</td>
346<td class="confluenceTd">These attributes allow to specify methods to
347carry out operations before and after being registered or unregistered
348from the MBean server.</td>
349</tr>
Clement Escoffier373a57d2009-07-21 12:06:46 +0000[diff] [blame^]350</tbody></table></div>
Clement Escoffier83507512008-10-13 07:33:03 +0000[diff] [blame]351
Clement Escoffier8251f602009-01-15 15:35:17 +0000[diff] [blame]352<h2><a name="iPOJOJMXHandler-Propertiesattributes"></a>Properties attributes</h2>
Clement Escoffier373a57d2009-07-21 12:06:46 +0000[diff] [blame^]353<div class="borderedTable"><table class="confluenceTable"><tbody>
Clement Escoffier8251f602009-01-15 15:35:17 +0000[diff] [blame]354<tr>
355<th class="confluenceTh">Attribute name</th>
356<th class="confluenceTh">Required</th>
357<th class="confluenceTh">Description</th>
358</tr>
359<tr>
360<td class="confluenceTd">field</td>
361<td class="confluenceTd">YES</td>
362<td class="confluenceTd">The name of the component's field to expose.</td>
363</tr>
364<tr>
365<td class="confluenceTd">name</td>
366<td class="confluenceTd">NO</td>
367<td class="confluenceTd">The name of the property as it will appear in JMX. If unspecified, the default value is the name of the exposed field.</td>
368</tr>
369<tr>
370<td class="confluenceTd">rights</td>
371<td class="confluenceTd">NO</td>
372<td class="confluenceTd">Specify the access permission of the exposed field. The accepted values are :
373<ul>
374 <li>"r" : read-only access, the default value.</li>
375 <li>"w" : read and write access.</li>
376</ul>
377</td>
378</tr>
379<tr>
380<td class="confluenceTd">notification</td>
381<td class="confluenceTd">NO</td>
382<td class="confluenceTd">Enable or disable attribute change
383notification sending for this property. If set to "true", a
384notification is sent each time the value of the field changes.</td>
385</tr>
Clement Escoffier373a57d2009-07-21 12:06:46 +0000[diff] [blame^]386</tbody></table></div>
Clement Escoffier8251f602009-01-15 15:35:17 +0000[diff] [blame]387<h2><a name="iPOJOJMXHandler-Methodsattributes"></a>Methods attributes</h2>
Clement Escoffier373a57d2009-07-21 12:06:46 +0000[diff] [blame^]388<div class="borderedTable"><table class="confluenceTable"><tbody>
Clement Escoffier8251f602009-01-15 15:35:17 +0000[diff] [blame]389<tr>
390<th class="confluenceTh">Attribute name</th>
391<th class="confluenceTh">Required</th>
392<th class="confluenceTh">Description</th>
393</tr>
394<tr>
395<td class="confluenceTd">name</td>
396<td class="confluenceTd">YES</td>
397<td class="confluenceTd">The name of the method to expose. If multiple methods have the same name, all of them are exposed.</td>
398</tr>
399<tr>
400<td class="confluenceTd">description</td>
401<td class="confluenceTd">NO</td>
402<td class="confluenceTd">The description of the exposed method, as it will appear in JMX.</td>
403</tr>
Clement Escoffier373a57d2009-07-21 12:06:46 +0000[diff] [blame^]404</tbody></table></div>
Clement Escoffier83507512008-10-13 07:33:03 +0000[diff] [blame]405
Clement Escoffier8251f602009-01-15 15:35:17 +0000[diff] [blame]406<h2><a name="iPOJOJMXHandler-Examples"></a>Examples</h2>
Clement Escoffier83507512008-10-13 07:33:03 +0000[diff] [blame]407
Clement Escoffier8251f602009-01-15 15:35:17 +0000[diff] [blame]408<p>In this part, we will give you a complete example of a component managed with JMX, using the JConsole provided by the SUN JDK.</p>
Clement Escoffier83507512008-10-13 07:33:03 +0000[diff] [blame]409
Clement Escoffier8251f602009-01-15 15:35:17 +0000[diff] [blame]410<h3><a name="iPOJOJMXHandler-ExposingAttributes"></a>Exposing Attributes</h3>
Clement Escoffier83507512008-10-13 07:33:03 +0000[diff] [blame]411
Clement Escoffier8251f602009-01-15 15:35:17 +0000[diff] [blame]412<p>In first time we create a simple component named MyComponent. We have add two fields named m_level (int) and m_message (String).</p>
Clement Escoffier373a57d2009-07-21 12:06:46 +0000[diff] [blame^]413<div class="code">
414<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>&nbsp;</span><span class="keyword">class</span><span>&nbsp;</span></td></tr><tr><td class="line2">MyComponent&nbsp;...&nbsp;{&nbsp;</td></tr><tr><td class="line1">&nbsp;&nbsp;&nbsp;&nbsp;<span class="comment">//&nbsp;Exposed&nbsp;attributes</span><span>&nbsp;</span></td></tr><tr><td class="line2">&nbsp;&nbsp;&nbsp;&nbsp;<span class="keyword">private</span><span>&nbsp;String&nbsp;m_message;&nbsp;</span></td></tr><tr><td class="line1">&nbsp;&nbsp;&nbsp;&nbsp;<span class="keyword">private</span><span>&nbsp;int&nbsp;m_level;&nbsp;</span></td></tr><tr><td class="line2">}&nbsp;</td></tr></tbody></table></div><textarea style="display: none;" name="newcodemacro" class="java:nocontrols:nogutter" rows="10" readonly="readonly">public class
Clement Escoffier83507512008-10-13 07:33:03 +0000[diff] [blame]415MyComponent ... {
Clement Escoffier373a57d2009-07-21 12:06:46 +0000[diff] [blame^]416 // Exposed attributes
417 private String m_message;
418 private int m_level;
419}</textarea>
420<script class="javascript">
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436
Clement Escoffier8251f602009-01-15 15:35:17 +0000[diff] [blame]437<p>We expose now the attributes in the jmx:config<br>
438tag in the metadata :</p>
Clement Escoffier373a57d2009-07-21 12:06:46 +0000[diff] [blame^]439<div class="code">
440<div class="dp-highlighter"><table class="dp-xml" border="0" cellpadding="0" cellspacing="0"><tbody><tr><td class="line1"><span></span><span class="tag">&lt;?</span><span>xml&nbsp;</span><span class="attribute">version</span><span>=</span><span class="attribute-value">"1.0"</span><span>&nbsp;</span><span class="attribute">encoding</span><span>=</span><span class="attribute-value">"UTF-8"</span><span>?&gt;&nbsp;</span></td></tr><tr><td class="line2"><span class="tag">&lt;</span><span>iPOJO&nbsp;xmlns:</span><span class="attribute">jmx</span><span>=</span><span class="attribute-value">"org.apache.felix.ipojo.handlers.jmx"</span><span>&gt;&nbsp;</span></td></tr><tr><td class="line1">&nbsp;&nbsp;&nbsp;&nbsp;<span class="tag">&lt;</span><span>component&nbsp;</span><span class="attribute">className</span><span>=</span><span class="attribute-value">"...MyComponent"</span><span>&nbsp;</span></td></tr><tr><td class="line2">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="attribute">architecture</span><span>=</span><span class="attribute-value">"true"</span><span>&nbsp;</span></td></tr><tr><td class="line1">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="attribute">immediate</span><span>=</span><span class="attribute-value">"true"</span><span>&gt;&nbsp;</span></td></tr><tr><td class="line2">&nbsp;</td></tr><tr><td class="line1">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="tag">&lt;</span><span>provides</span><span class="tag">/&gt;</span><span>&nbsp;</span></td></tr><tr><td class="line2">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="tag">&lt;</span><span>jmx:config</span><span class="tag">&gt;</span><span>&nbsp;</span></td></tr><tr><td class="line1">&nbsp;&nbsp;&nbsp;&nbsp;<span class="comments">&lt;!--&nbsp;Exposed&nbsp;properties&nbsp;--&gt;</span><span>&nbsp;</span></td></tr><tr><td class="line2">&nbsp;&nbsp;&nbsp;&nbsp;<span class="tag">&lt;</span><span>jmx:property&nbsp;</span><span class="attribute">field</span><span>=</span><span class="attribute-value">"m_level"</span><span>&nbsp;</span></td></tr><tr><td class="line1">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="attribute">name</span><span>=</span><span class="attribute-value">"The&nbsp;level"</span><span>&nbsp;</span></td></tr><tr><td class="line2">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="attribute">rights</span><span>=</span><span class="attribute-value">"r"</span><span>/&gt;&nbsp;</span></td></tr><tr><td class="line1">&nbsp;&nbsp;&nbsp;&nbsp;<span class="tag">&lt;</span><span>jmx:property&nbsp;</span><span class="attribute">field</span><span>=</span><span class="attribute-value">"m_message"</span><span>&nbsp;</span></td></tr><tr><td class="line2">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="attribute">name</span><span>=</span><span class="attribute-value">"The&nbsp;message"</span><span>&nbsp;</span></td></tr><tr><td class="line1">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="attribute">rights</span><span>=</span><span class="attribute-value">"w"</span><span>/&gt;&nbsp;</span></td></tr><tr><td class="line2">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="tag">&lt;/</span><span>jmx:config</span><span class="tag">&gt;</span><span>&nbsp;</span></td></tr><tr><td class="line1">&nbsp;&nbsp;&nbsp;&nbsp;<span class="tag">&lt;/</span><span>component</span><span class="tag">&gt;</span><span>&nbsp;</span></td></tr><tr><td class="line2">&nbsp;&nbsp;&nbsp;&nbsp;<span class="tag">&lt;</span><span>instance&nbsp;</span></td></tr><tr><td class="line1">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="attribute">component</span><span>=</span><span class="attribute-value">"...MyComponent"</span><span>/&gt;&nbsp;</span></td></tr><tr><td class="line2"><span class="tag">&lt;/</span><span>iPOJO</span><span class="tag">&gt;</span><span>&nbsp;</span></td></tr></tbody></table></div><textarea style="display: none;" name="newcodemacro" class="xml:nocontrols:nogutter" rows="10" readonly="readonly">&lt;?xml version="1.0" encoding="UTF-8"?&gt;
441&lt;iPOJO xmlns:jmx="org.apache.felix.ipojo.handlers.jmx"&gt;
442 &lt;component className="...MyComponent"
443 architecture="true"
444 immediate="true"&gt;
Clement Escoffier83507512008-10-13 07:33:03 +0000[diff] [blame]445
Clement Escoffier373a57d2009-07-21 12:06:46 +0000[diff] [blame^]446 &lt;provides/&gt;
447 &lt;jmx:config&gt;
448 &lt;!-- Exposed properties --&gt;
449 &lt;jmx:property field="m_level"
450 name="The level"
451 rights="r"/&gt;
452 &lt;jmx:property field="m_message"
453 name="The message"
454 rights="w"/&gt;
455 &lt;/jmx:config&gt;
456 &lt;/component&gt;
Clement Escoffier83507512008-10-13 07:33:03 +0000[diff] [blame]457 &lt;instance
Clement Escoffier373a57d2009-07-21 12:06:46 +0000[diff] [blame^]458 component="...MyComponent"/&gt;
459&lt;/iPOJO&gt;</textarea>
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Clement Escoffier8251f602009-01-15 15:35:17 +0000[diff] [blame]477<p>Now, we could get and write the properties in the JConsole :<br>
Clement Escoffier373a57d2009-07-21 12:06:46 +0000[diff] [blame^]478<img src="ipojo-jmx-handler_files/JMXHandler_1.png" border="0" align="absmiddle"></p>
Clement Escoffier83507512008-10-13 07:33:03 +0000[diff] [blame]479
Clement Escoffier8251f602009-01-15 15:35:17 +0000[diff] [blame]480<h3><a name="iPOJOJMXHandler-ExposingMethods"></a>Exposing Methods</h3>
Clement Escoffier83507512008-10-13 07:33:03 +0000[diff] [blame]481
Clement Escoffier8251f602009-01-15 15:35:17 +0000[diff] [blame]482<p>We could now add methods in the initial class :</p>
Clement Escoffier373a57d2009-07-21 12:06:46 +0000[diff] [blame^]483<div class="code">
484<div class="dp-highlighter"><table class="dp-c" border="0" cellpadding="0" cellspacing="0"><tbody><tr><td class="line1"><span></span><span class="comment">/**</span></td></tr><tr><td class="line2"><span class="comment">Do&nbsp;something&nbsp;good</span></td></tr><tr><td class="line1"><span class="comment">*/</span><span>&nbsp;</span></td></tr><tr><td class="line2"><span class="keyword">public</span><span>&nbsp;</span><span class="keyword">void</span><span>&nbsp;doSomethingGood()&nbsp;{&nbsp;</span></td></tr><tr><td class="line1">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;...&nbsp;</td></tr><tr><td class="line2">}&nbsp;</td></tr><tr><td class="line1">&nbsp;</td></tr><tr><td class="line2"><span class="comment">/**</span></td></tr><tr><td class="line1"><span class="comment">Do&nbsp;something&nbsp;bad</span></td></tr><tr><td class="line2"><span class="comment">*/</span><span>&nbsp;</span></td></tr><tr><td class="line1"><span class="keyword">public</span><span>&nbsp;</span><span class="keyword">void</span><span>&nbsp;doSomethingBad()&nbsp;{&nbsp;</span></td></tr><tr><td class="line2">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;...&nbsp;</td></tr><tr><td class="line1">}&nbsp;</td></tr><tr><td class="line2">&nbsp;</td></tr><tr><td class="line1"><span class="comment">/**</span></td></tr><tr><td class="line2"><span class="comment">Do&nbsp;nothing</span></td></tr><tr><td class="line1"><span class="comment">*/</span><span>&nbsp;</span></td></tr><tr><td class="line2"><span class="keyword">public</span><span>&nbsp;</span><span class="keyword">void</span><span>&nbsp;doNothing()&nbsp;{&nbsp;</span></td></tr><tr><td class="line1">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;...&nbsp;</td></tr><tr><td class="line2">}&nbsp;</td></tr></tbody></table></div><textarea style="display: none;" name="newcodemacro" class="java:nocontrols:nogutter" rows="10" readonly="readonly">/**
Clement Escoffier83507512008-10-13 07:33:03 +0000[diff] [blame]485Do something good
486*/
Clement Escoffier373a57d2009-07-21 12:06:46 +0000[diff] [blame^]487public void doSomethingGood() {
Clement Escoffier83507512008-10-13 07:33:03 +0000[diff] [blame]488 ...
489}
490
491/**
492Do something bad
493*/
Clement Escoffier373a57d2009-07-21 12:06:46 +0000[diff] [blame^]494public void doSomethingBad() {
Clement Escoffier83507512008-10-13 07:33:03 +0000[diff] [blame]495 ...
496}
497
498/**
499Do nothing
500*/
Clement Escoffier373a57d2009-07-21 12:06:46 +0000[diff] [blame^]501public void doNothing() {
Clement Escoffier83507512008-10-13 07:33:03 +0000[diff] [blame]502 ...
Clement Escoffier373a57d2009-07-21 12:06:46 +0000[diff] [blame^]503}</textarea>
504<script class="javascript">
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520
Clement Escoffier8251f602009-01-15 15:35:17 +0000[diff] [blame]521<p>We add corresponding tags in the metadata to expose these methods:</p>
Clement Escoffier373a57d2009-07-21 12:06:46 +0000[diff] [blame^]522<div class="code">
523<div class="dp-highlighter"><table class="dp-xml" border="0" cellpadding="0" cellspacing="0"><tbody><tr><td class="line1"><span></span><span class="comments">&lt;!--&nbsp;Exposed&nbsp;methods&nbsp;--&gt;</span><span>&nbsp;</span></td></tr><tr><td class="line2"><span class="tag">&lt;</span><span>jmx:method&nbsp;</span><span class="attribute">name</span><span>=</span><span class="attribute-value">"doSomethingGood"</span><span>&nbsp;</span></td></tr><tr><td class="line1">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="attribute">description</span><span>=</span><span class="attribute-value">"Do&nbsp;something&nbsp;good."</span><span>/&gt;&nbsp;</span></td></tr><tr><td class="line2"><span class="tag">&lt;</span><span>jmx:method&nbsp;</span><span class="attribute">name</span><span>=</span><span class="attribute-value">"doSomethingBad"</span><span>&nbsp;</span></td></tr><tr><td class="line1">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="attribute">description</span><span>=</span><span class="attribute-value">"Do&nbsp;something&nbsp;bad."</span><span>/&gt;&nbsp;</span></td></tr><tr><td class="line2"><span class="tag">&lt;</span><span>jmx:method&nbsp;</span><span class="attribute">name</span><span>=</span><span class="attribute-value">"doNothing"</span><span>&nbsp;</span></td></tr><tr><td class="line1">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="attribute">description</span><span>=</span><span class="attribute-value">"Do&nbsp;absolutely&nbsp;nothing."</span><span>/&gt;&nbsp;</span></td></tr></tbody></table></div><textarea style="display: none;" name="newcodemacro" class="xml:nocontrols:nogutter" rows="10" readonly="readonly">&lt;!-- Exposed methods --&gt;
524&lt;jmx:method name="doSomethingGood"
525 description="Do something good."/&gt;
526&lt;jmx:method name="doSomethingBad"
527 description="Do something bad."/&gt;
528&lt;jmx:method name="doNothing"
529 description="Do absolutely nothing."/&gt;</textarea>
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Clement Escoffier8251f602009-01-15 15:35:17 +0000[diff] [blame]547<p>Now the three methods are exposed in the operations tab of the JConsole. We can invoked these methods :</p>
Clement Escoffier83507512008-10-13 07:33:03 +0000[diff] [blame]548
Clement Escoffier373a57d2009-07-21 12:06:46 +0000[diff] [blame^]549<p><img src="ipojo-jmx-handler_files/JMXHandler_2.png" border="0" align="absmiddle"></p>
Clement Escoffier83507512008-10-13 07:33:03 +0000[diff] [blame]550
Clement Escoffier8251f602009-01-15 15:35:17 +0000[diff] [blame]551<h3><a name="iPOJOJMXHandler-AttributeNotifications:"></a>Attribute Notifications:</h3>
Clement Escoffier83507512008-10-13 07:33:03 +0000[diff] [blame]552
Clement Escoffier8251f602009-01-15 15:35:17 +0000[diff] [blame]553<p>You could subscribe to attribute notification by adding the
554notification attribute in property tag. In our example if we want to be
555notified when m_level is modified, we change the property line in the
556metatada like this:</p>
Clement Escoffier373a57d2009-07-21 12:06:46 +0000[diff] [blame^]557<div class="code">
558<div class="dp-highlighter"><table class="dp-xml" border="0" cellpadding="0" cellspacing="0"><tbody><tr><td class="line1"><span></span><span class="tag">&lt;</span><span>jmx:property&nbsp;</span><span class="attribute">field</span><span>=</span><span class="attribute-value">"m_level"</span><span>&nbsp;</span></td></tr><tr><td class="line2">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="attribute">name</span><span>=</span><span class="attribute-value">"The&nbsp;level"</span><span>&nbsp;</span></td></tr><tr><td class="line1">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="attribute">rights</span><span>=</span><span class="attribute-value">"r"</span><span>&nbsp;</span></td></tr><tr><td class="line2">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="attribute">notification</span><span>=</span><span class="attribute-value">"true"</span><span>/&gt;&nbsp;</span></td></tr></tbody></table></div><textarea style="display: none;" name="newcodemacro" class="xml:nocontrols:nogutter" rows="10" readonly="readonly">&lt;jmx:property field="m_level"
559 name="The level"
560 rights="r"
561 notification="true"/&gt;</textarea>
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Clement Escoffier8251f602009-01-15 15:35:17 +0000[diff] [blame]579<p>So now if we change the string through JConsole or if the POJO is
580modified in other way, a notification will be sent to every listener.
581For example, we subscribe in the notification tab, and we get
582notification when the message changes :</p>
Clement Escoffier83507512008-10-13 07:33:03 +0000[diff] [blame]583
Clement Escoffier373a57d2009-07-21 12:06:46 +0000[diff] [blame^]584<p><img src="ipojo-jmx-handler_files/JMXHandler_3.png" border="0" align="absmiddle"></p>
Clement Escoffier8251f602009-01-15 15:35:17 +0000[diff] [blame]585
Clement Escoffier373a57d2009-07-21 12:06:46 +0000[diff] [blame^]586<h2><a name="iPOJOJMXHandler-Configuringthehandlerwithannotations"></a>Configuring the handler with annotations</h2>
Clement Escoffier8251f602009-01-15 15:35:17 +0000[diff] [blame]587
Clement Escoffier373a57d2009-07-21 12:06:46 +0000[diff] [blame^]588<p>It is possible to configure the handler with simple annotations available with iPOJO annotations. Here is an example of usage:</p>
589<div class="code">
590<div class="dp-highlighter"><table class="dp-c" border="0" cellpadding="0" cellspacing="0"><tbody><tr><td class="line1"><span></span><span class="keyword">import</span><span>&nbsp;org.apache.felix.ipojo.annotations.Component;&nbsp;</span></td></tr><tr><td class="line2"><span class="keyword">import</span><span>&nbsp;org.apache.felix.ipojo.handlers.jmx.Config;&nbsp;</span></td></tr><tr><td class="line1"><span class="keyword">import</span><span>&nbsp;org.apache.felix.ipojo.handlers.jmx.Method;&nbsp;</span></td></tr><tr><td class="line2"><span class="keyword">import</span><span>&nbsp;org.apache.felix.ipojo.handlers.jmx.Property;&nbsp;</span></td></tr><tr><td class="line1"><span class="preprocessor"></span></td></tr><tr><td class="line2"><span class="preprocessor">@Component</span><span>&nbsp;</span></td></tr><tr><td class="line1"><span class="preprocessor">@Config(domain="my-domain",&nbsp;usesMOSGi=false)</span><span>&nbsp;</span></td></tr><tr><td class="line2"><span class="keyword">public</span><span>&nbsp;</span><span class="keyword">class</span><span>&nbsp;JMXSimple&nbsp;{&nbsp;</span></td></tr><tr><td class="line1"><span class="preprocessor"></span></td></tr><tr><td class="line2"><span class="preprocessor">&nbsp;&nbsp;&nbsp;&nbsp;@Property(name="prop",&nbsp;notification=true,&nbsp;rights="w")&nbsp;//&nbsp;Field&nbsp;published&nbsp;in&nbsp;the&nbsp;MBean</span><span>&nbsp;</span></td></tr><tr><td class="line1">&nbsp;&nbsp;&nbsp;&nbsp;String&nbsp;m_foo;&nbsp;</td></tr><tr><td class="line2"><span class="preprocessor">&nbsp;&nbsp;&nbsp;&nbsp;</span></td></tr><tr><td class="line1"><span class="preprocessor">&nbsp;&nbsp;&nbsp;&nbsp;@Method(description="set&nbsp;the&nbsp;foo&nbsp;prop")&nbsp;//&nbsp;Method&nbsp;published&nbsp;in&nbsp;the&nbsp;MBean</span><span>&nbsp;</span></td></tr><tr><td class="line2">&nbsp;&nbsp;&nbsp;&nbsp;<span class="keyword">public</span><span>&nbsp;</span><span class="keyword">void</span><span>&nbsp;setFoo(String&nbsp;mes)&nbsp;{&nbsp;</span></td></tr><tr><td class="line1">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;System.out.println(<span class="string">"Set&nbsp;foo&nbsp;to&nbsp;"</span><span>&nbsp;+&nbsp;mes);&nbsp;</span></td></tr><tr><td class="line2">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;m_foo&nbsp;=&nbsp;mes;&nbsp;</td></tr><tr><td class="line1">&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;</td></tr><tr><td class="line2"><span class="preprocessor">&nbsp;&nbsp;&nbsp;&nbsp;</span></td></tr><tr><td class="line1"><span class="preprocessor">&nbsp;&nbsp;&nbsp;&nbsp;@Method(description="get&nbsp;the&nbsp;foo&nbsp;prop")&nbsp;//&nbsp;Method&nbsp;published&nbsp;in&nbsp;the&nbsp;MBean</span><span>&nbsp;</span></td></tr><tr><td class="line2">&nbsp;&nbsp;&nbsp;&nbsp;<span class="keyword">public</span><span>&nbsp;String&nbsp;getFoo()&nbsp;{&nbsp;</span></td></tr><tr><td class="line1">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="keyword">return</span><span>&nbsp;m_foo;&nbsp;</span></td></tr><tr><td class="line2">&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;</td></tr><tr><td class="line1">}&nbsp;</td></tr></tbody></table></div><textarea style="display: none;" name="newcodemacro" class="java:nocontrols:nogutter" rows="10" readonly="readonly">import org.apache.felix.ipojo.annotations.Component;
591import org.apache.felix.ipojo.handlers.jmx.Config;
592import org.apache.felix.ipojo.handlers.jmx.Method;
593import org.apache.felix.ipojo.handlers.jmx.Property;
Clement Escoffier8251f602009-01-15 15:35:17 +0000[diff] [blame]594
595@Component
Clement Escoffier373a57d2009-07-21 12:06:46 +0000[diff] [blame^]596@Config(domain="my-domain", usesMOSGi=false)
597public class JMXSimple {
Clement Escoffier8251f602009-01-15 15:35:17 +0000[diff] [blame]598
Clement Escoffier373a57d2009-07-21 12:06:46 +0000[diff] [blame^]599 @Property(name="prop", notification=true, rights="w") // Field published in the MBean
600 String m_foo;
Clement Escoffier8251f602009-01-15 15:35:17 +0000[diff] [blame]601
Clement Escoffier373a57d2009-07-21 12:06:46 +0000[diff] [blame^]602 @Method(description="set the foo prop") // Method published in the MBean
603 public void setFoo(String mes) {
604 System.out.println("Set foo to " + mes);
Clement Escoffier8251f602009-01-15 15:35:17 +0000[diff] [blame]605 m_foo = mes;
606 }
607
Clement Escoffier373a57d2009-07-21 12:06:46 +0000[diff] [blame^]608 @Method(description="get the foo prop") // Method published in the MBean
609 public String getFoo() {
610 return m_foo;
Clement Escoffier8251f602009-01-15 15:35:17 +0000[diff] [blame]611 }
Clement Escoffier373a57d2009-07-21 12:06:46 +0000[diff] [blame^]612}</textarea>
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Clement Escoffier8251f602009-01-15 15:35:17 +0000[diff] [blame]630<p>The <tt>@org.apache.felix.ipojo.handlers.jmx.Config</tt> (<tt>@Config</tt> if the package it correctly imported) annotation is a type annotation (so placed on the <tt>class</tt> element. This annotation indicates that the instance will be exposed as an MBean. This annotation supports:</p>
631<ul>
632 <li>usesMOSGi: set to <tt>true</tt> to use MOSGi. Otherwise, the MBean will be exposed in the MBean Platform Server (default: <tt>false</tt>).</li>
633 <li>objectname: set the MBean objectname. The objectname must follow JMX specification. (default: <tt>package-name:factory-name:instance-name</tt>)</li>
634 <li>domain: set the MBean domain. (default: <tt>package-name</tt>)</li>
635 <li>name: set the MBean name. (default: <tt>instance-name</tt>).</li>
636</ul>
Clement Escoffier83507512008-10-13 07:33:03 +0000[diff] [blame]637
638
Clement Escoffier8251f602009-01-15 15:35:17 +0000[diff] [blame]639<p>The <tt>@org.apache.felix.ipojo.handlers.jmx.Property</tt> (<tt>@Property</tt>) annotation is a field annotation indicating that the field is exposed in the MBean. The supported attributes are:</p>
640<ul>
641 <li>name: set the property name</li>
642 <li>rights: set the access permission. Possible values are <tt>r</tt> (read only) and <tt>w</tt> (read and write). By default, properties are in read-only mode.</li>
643 <li>notification: enables notification on this property. By default notifications are disabled.</li>
644</ul>
Clement Escoffier83507512008-10-13 07:33:03 +0000[diff] [blame]645
646
Clement Escoffier8251f602009-01-15 15:35:17 +0000[diff] [blame]647<p>The <tt>@org.apache.felix.ipojo.handlers.jmx.Method</tt> (<tt>@Method</tt>) annotation is a method annotation indicating that the method is exposed in the MBean. Only one attribute can be customized:</p>
648<ul>
Clement Escoffier373a57d2009-07-21 12:06:46 +0000[diff] [blame^]649 <li>description: set the method description.
650<br clear="all">
651<br clear="all">
Clement Escoffier83507512008-10-13 07:33:03 +0000[diff] [blame]652
Clement Escoffier373a57d2009-07-21 12:06:46 +0000[diff] [blame^]653 </li></ul></div>
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Clement Escoffier8251f602009-01-15 15:35:17 +0000[diff] [blame]656
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