Logging improvement

Today, when I have info for org.opendaylight.openflowplugin, it shows for connection but not for disconnection.
And when I set debug, i see good amount of loggings, but it is difficult to have logs, workspace to find out the given log for which device.

1) INFO: A connect and disconnect logs should be there in place
2) Any openflow plugin log, should print the node id
3) <please add specific requirements if you think any>