[SNMP4J] enable SNMP monitoring for Java app with existing MBeans

[david pocivalnik]

Hi Frank,

thanks! worked like a charm.

BR
david

On 2/21/2013 8:53 PM, Frank Fock wrote:
> Hi David,
>
> You need to send a SNMP SET PDU to trigger an action.
> With GET you get only the current state of the action adapter object.
>
> Best regards,
> Frank
>
> Am 21.02.2013 19:04, schrieb david pocivalnik:
>> Hi Frank,
>>
>> thanks for the explanations. I left only open issues (for readability)
>> and commented inline.
>>
>> On 2/21/2013 1:25 AM, Frank Fock wrote:
>>> Please find my comments inline below:
>>> Am 19.02.2013 11:10, schrieb david pocivalnik:
>>>> but, I don't understand some details.
>> [...]
>>>> - the OID's I'm using start with "1.3.6.1.4.", when adding a View (in
>>>> the agent, vacm.addViewTreeFamily) I thought that when removing
>>>> vacm.addViewTreeFamily(new OctetString("fullReadView"), new OID("1.3"),
>>>> new OctetString(), VacmMIB.vacmViewIncluded, StorageType.nonVolatile);
>>>> I would only get an error back, but I again received the value.
>>> It seems that there is another view associated with the group mapped to
>>> your user that allows access to the OID.
>> I haven't checked that yet.
>>
>>>> - with SNMP it is possible to set and get values, but just to be sure, i
>>>> can't call a method from an SNMP manager that returns void, but executes
>>>> the method called?
>>> SNMP4J-AgentJMX provides MBeanActionMOScalarSupport to support actions
>>> (= method call)
>>> on scalars:
>>> http://www.snmp4j.org/agentJMX/doc/org/snmp4j/agent/mo/jmx/MBeanActionMOScalarSupport.html
>>> The mapping of the action parameters is provided through MBeanActionInfo.
>> thanks. I added
>>
>> private static final Object[][] SCALAR_MBEANS_IMP_ACTIONS = {
>> 		{ TestManagementMib.oidImpCall, 			new MBeanStateInfo[] { new
>> MBeanStateInfo(2, null, null) },
>> new MBeanActionInfo[] { new MBeanActionInfo(3, "startImport", new
>> Object[0]) }}};
>>
>> scalarSupportActions.addAll(onameImp, SCALAR_MBEANS_IMP_ACTIONS);
>>
>> impCall = moFactory.createScalar(oidImpCall,
>> 				moFactory.createAccess(MOAccessImpl.ACCESSIBLE_FOR_READ_WRITE), new
>> Integer32());
>>
>> to the designated methods, as done for SCALAR_MBEANS_JVM_MEMORY_ACTIONS
>> in your example. The only problem, I can't seem to execute the method.
>> I'm sure that's a problem with the snmp call. I tried with
>>
>> libexec/check_snmp -H dp -C public -o .1.3.6.1.4.1.42.2.145.3.163.1.1.2.3.0
>> (script by nagios) and
>> snmpget -c public -v 2c dp .1.3.6.1.4.1.42.2.145.3.163.1.1.2.3.0
>>
>> which should call gc(), but in both cases the response is
>>
>> SNMP OK - 2 | iso.3.6.1.4.1.42.2.145.3.163.1.1.2.3.0=2 ,
>> iso.3.6.1.4.1.42.2.145.3.163.1.1.2.3.0 = INTEGER: 2 respectively.
>>
>> the same is true for the method I tried to call in my small test
>> application, which should just print something on the console of the
>> agent when called.
>>
>> i couldn't think of any other method that I could use. Do you have any
>> idea what command to use to execute a method?
>>
>> Thanks in advance and BR
>> David
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>