[jira] [Commented] (MARMOTTA-408) Use MBeans / JMX for monitoring and statistics

["Rajika Kumarasiri (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/MARMOTTA-408?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13917518#comment-13917518 ] 

Rajika Kumarasiri commented on MARMOTTA-408:
--------------------------------------------

hello, 

I got the proposed POC working. Please find the attached patch and the screenshot. 

The screenshot shows how I exposed the OS and JDK run-time information(similar to System->Statistics->System ) using a MBean from the newly developed JMX infrastructure. 

The classes; 
a). org.apache.marmotta.platform.core.api.jmx.JMXService
b). org.apache.marmotta.platform.core.services.jmx.JMXServiceImpl
c). org.apache.marmotta.platform.core.services.jmx.JMXRMIRegistryController
d). org.apache.marmotta.platform.core.services.jmx.JMXMBeansRegister
e). org.apache.marmotta.platform.core.services.jmx.JMXAdapter

are responsible for #1 in the jira. The mentioned MBeanRegister API is defined in JMXMBeansRegister (d)). It has the APIs to register and unregister the MBeans. The other classes basically create a JMX connector and starts it with the platform. I consumed the SystemStartupEvent to start the JMX CDI service. When the JMX service started you will see a log entry similar to below.
11:19:49.001 INFO  o.a.m.p.core.services.jmx.JMXAdapter - Management using JMX available from 'service:jmx:rmi:///jndi/rmi://localhost:15000/marmotta'.

The interface and class;
a). org.apache.marmotta.platform.core.services.jmx.SystemStatisticsMBean
b). org.apache.marmotta.platform.core.services.jmx.SystemStatistics   

are an example for #2. They collects the stats about the OS/JDK run time data and register them into  #1 using MBeans so that we can view that statistics using JConsole(or any other JMX client). This is what can be seen in the screen shot. I just implemented this logic inside org.apache.marmotta.platform.core.services.jmx.JMXServiceImpl itself but it should be implemented in each place where those stats will be collected (for example org.apache.marmotta.platform.core.services.statistics.system.SystemStatisticsModule). 

Now the next step is to identify various places, components or modules across the platform and other places and replace them with relevant MBeans and register them with the MBean server similar to #2 above. #1 also need to improve so that other jmx parameters can be configured(for example SSL connections). 

Do you think I am heading in the correct direction ? I would like to start writing my proposal based on this information once I compiled a list of places to have new MBeans to collect respective statistics. I am familiar with JUnit and each of this new feature will be covered with a JUnit test case. 

Please let me know your feedback or any comment.

Thank you.

> Use MBeans / JMX for monitoring  and statistics
> -----------------------------------------------
>
>                 Key: MARMOTTA-408
>                 URL: https://issues.apache.org/jira/browse/MARMOTTA-408
>             Project: Marmotta
>          Issue Type: Improvement
>          Components: Platform
>            Reporter: Sebastian Schaffert
>              Labels: gsoc2014, java, jmx
>
> We should use JMX for monitoring different aspects of the Marmotta system, e.g. the caching statistics. This should replace the existing StatisticsService, providing a new infrastructure to store and push via JMX different parameters, allowing to monitor Marmotta from any of the available JMX tools.



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