How to figure out whether context is still connected

hi all,
i wrote a little java ldap util which is using jndi.
this util overs the possibility to keep the connection to the ldapServer once it has been established. this feature is using the jndi feature overing the keep connection setting.
now, when the time has come to reuse the context i want to figure out whether it is still connected to the ldapServer or not. e.g. if the server has reset the connection due to a timeout, i want to be able to get to know that.
unfortunatelly i wasn't able to figure out how to do this yet.
i implemented a workAround which does a simple ctx.lookup("") at the context which is expected to still be connected.
but i don't like this solution cause it causes additional network traffic which is in fact not needed.
so my question is how do i figure out whether the connection opend by the context is still open before im going to use that context again?
thx a lot
dialsc

Why do you want to know? Just use the context. If the context is still connected you save a handshake; if it isn't, it forms a new connection. What other possibility is there?

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