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From Dag Wanvik <dag.wan...@oracle.com>
Subject Re: Finding a role of Derby pair in Replication (Master or Slave)
Date Wed, 27 Feb 2013 03:37:04 GMT
The replication feature in Derby is pretty much bare bones still. I
don't believe there is an easy API to enquire about the
state as you request. I think you should be able to detect if the slave
has failed over, by seeing you can now connect to it (when it is still a
slave it isn't fully booted an normal connection attempt will fail).

As for an active Derby db instance being master, I think you can inspect
the log file to detect that state. Trying a startMaster would fail if it
is already a master, but that could have side effects you don't want of

Hope this helps,

On 27.02.2013 00:44, Oskar Zinger wrote:
> Is there a way to find out if a replicating pair of Derby is either
> master or slave? Or if the derby pair is participating in replication
> (mode)?
> It would be nice to have a way to find out a role and if its in
> replicating mode.
> This would be useful and easy way to determine which stopMaster=true
> or stopSlave=true attribute to use.
> Thanks,
> Oskar

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