Re: [Springframework-developer] some jmx questions.

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Mark,

Just committed a fix to this. I guess I made the mistake of testing 
against the reference implementation when MX4J is actually a more 
accurate implementation ;). The problem was the default cache was set to 
never stale and so MX4J will always use its cached value which is 
unfortunately null. I set the default cached value to be -1 which is 
always stale (no caching). You can change this with the 
currencyTimeLimit property of the ManagedOperation attribute.

Regarding parameter information - that is a really good idea. The only 
problem I foresee is that configuration will unwieldy and index-based 
since it is impossible to get parameter names at runtime using reflection.

Rob

Rob Harrop wrote:

> Actually ignore that - I have managed to reproduce this in a test - 
> I'll look into it a bit more.
>
> Rob
>
> Rob Harrop wrote:
>
>> Mark,
>>
>> I guess this is a stupid question, but you did compile the Commons 
>> Attributes stuff? I ran all the tests against MX4J and they seems to 
>> run fine - including the method invocation ones.
>>
>> Rob
>>
>> Rob Harrop wrote:
>>
>>> Mark,
>>>
>>> It seems that you are using a fairly old version of JMX - a lot of 
>>> the class names are now different, but I don't think that is the 
>>> problem. I've put some time aside next week to really polish up JMX 
>>> support and perform a lot of testing on different platforms. I'll 
>>> get you an answer on this during the week.
>>>
>>> Rob
>>>
>>> Mark Pollack wrote:
>>>
>>>> Hi,
>>>>
>>>> I was playing around with the JMX sandbox - very useful - and have 
>>>> a few questions  Wasn't sure if I should post on the forum...but 
>>>> anyway...
>>>>
>>>> I couldn't get the MetadataModelMBeanInfoAssembler to work, when I 
>>>> tried to execute a managed operation I got "no result" shown in the 
>>>> MX4J http console, although only the methods I chose to expose were 
>>>> displayed.  If I remove the usage of the metadata and rely on the 
>>>> reflection support - it all works fine but I'd like to only expose 
>>>> some of the methods in my class.
>>>>
>>>> Here is a code snip since I was doing this inside a helper class I 
>>>> already had for MX4J.  Commenting out the metadata config code 
>>>> results in a happy app... :)
>>>>        JmxMBeanAdapter adapter = new JmxMBeanAdapter();
>>>>        adapter.setBeanFactory(beanFactory_);
>>>>        adapter.setServer(mBeanServer_);
>>>>        adapter.setBeans(beans_);
>>>>        //metadata config start
>>>>
>>>>        JmxAttributeSource attributesImpl = new 
>>>> CommonsAttributesJmxAttributeSource();
>>>>        MetadataModelMBeanInfoAssembler ass = new 
>>>> MetadataModelMBeanInfoAssembler();
>>>>        ass.setAttributeSource(attributesImpl);
>>>>        MetadataNamingStrategy naming = new MetadataNamingStrategy();
>>>>        naming.setAttributeSource(attributesImpl);
>>>>        adapter.setAssembler(ass);
>>>>        adapter.setNamingStrategy(naming);
>>>>
>>>> //metadata config end
>>>>               LOG.info("Registering mbeans....");
>>>>        adapter.afterPropertiesSet();
>>>>        LOG.info("Done registering mbeans.");
>>>>
>>>> and I have added attributes such as
>>>>
>>>> /**
>>>> * 
>>>> @@org.springframework.jmx.metadata.support.ManagedResource(objectName="TeamWork:Name=UserService", 
>>>> description="User Management")
>>>> *  */
>>>> public class HibernateUserService extends HibernateDaoSupport 
>>>> implements
>>>>        UserService
>>>>
>>>>
>>>>    /**
>>>>     *     * 
>>>> @@org.springframework.jmx.metadata.support.ManagedOperation(description="Create 
>>>> a user with a unique id")
>>>>     */
>>>>    public User create(String uniqueName)
>>>>
>>>>
>>>> and the beans_ map contains an entry <entry 
>>>> key="TeamWork:Name=UserService"><ref bean="UserService"/></entry>
>>>>
>>>> with a log like this....
>>>>
>>>> INFO [main] 2005-01-21 17:26:01,359 
>>>> [com.codestreet.application.jmx.DefaultAdapterFactoryBean] - 
>>>> Registering mbeans....
>>>>
>>>> DEBUG [main] 2005-01-21 17:26:01,671 
>>>> [org.springframework.jmx.JmxMBeanAdapter] - Bean Name: UserService 
>>>> has been autodetected for JMXification. Instantiating Now.
>>>>
>>>> DEBUG [main] 2005-01-21 17:26:01,671 
>>>> [org.springframework.jmx.JmxMBeanAdapter] - Bean with name: 
>>>> UserService is already registered for JMXification.
>>>>
>>>> DEBUG [main] 2005-01-21 17:26:01,906 
>>>> [org.springframework.jmx.JmxMBeanAdapter] - Located bean under key 
>>>> [TeamWork:Name=UserService] registering with JMX server.
>>>>
>>>> DEBUG [main] 2005-01-21 17:26:01,906 
>>>> [org.springframework.jmx.JmxMBeanAdapter] - Registering and 
>>>> Assembling MBean: TeamWork:Name=UserService
>>>>
>>>> INFO [main] 2005-01-21 17:26:01,937 
>>>> [org.springframework.jmx.JmxMBeanAdapter] - Registered MBean: 
>>>> TeamWork:Name=UserService
>>>>
>>>> INFO [main] 2005-01-21 17:26:01,937 
>>>> [com.codestreet.application.jmx.DefaultAdapterFactoryBean] - Done 
>>>> registering mbeans.
>>>>
>>>>
>>>>
>>>> Another issue was that for some reason the commons-attributes 
>>>> compiler was changing the string TeamWork:Name=UserService to 
>>>> TeamWork.Name=UserService, replacing the colon with a period.  Have 
>>>> you seen that?
>>>>
>>>> By way of extention has it been considered to add support for 
>>>> decribing method parameters in the operation attribute and relaying 
>>>> that info to the modelmbean?
>>>>
>>>> Thanks any help...
>>>>
>>>> Cheers,
>>>> Mark
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
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>>>>  
>>>>
>>>
>>>
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