Arthas: Mbean support

[dili91]

Hi, first of all thank you for this amazing tool. it was a huge help for me in the last weeks, much more than existing and commercial tools.

Now my question:
Is there a way I can enquiry MBean objects on a running java process ? In a similar way like on VisualVm + MBean plugin installed...
If not already feasible with the help of OGNL syntax, would it be possible/ are you interested in adding this feature ?

[hengyunabc]

There is a plan to support JMX: https://github.com/alibaba/arthas/issues/367

Use the ognl command to get MBean object:

ognl '@java.lang.management.ManagementFactory@getOperatingSystemMXBean().getSystemLoadAverage()'

[dili91]

Some OGNL statements that might be useful to others :

1. List all active Mbeans
ognl '@java.lang.management.ManagementFactory@getPlatformMBeanServer().queryNames(null, null)'

_OR_

ognl '@java.lang.management.ManagementFactory@getPlatformMBeanServer().queryMBeans(null, null)'

2. Get all attributes available for a specific MBean
ognl '@java.lang.management.ManagementFactory@getPlatformMBeanServer().getMBeanInfo(@javax.management.ObjectName@getInstance("com.zaxxer.hikari:type=Pool (myds1)")).getAttributes()'

3. Inspect a MBean attribute value
ognl '@java.lang.management.ManagementFactory@getPlatformMBeanServer().getAttribute(@javax.management.ObjectName@getInstance("com.zaxxer.hikari:type=Pool (myds1)"), "ActiveConnections")'