Re: sync on local variable

Roedy Green <>
Wed, 24 Mar 2010 17:42:02 -0700
On Wed, 24 Mar 2010 15:55:30 -0700, markspace <>
wrote, quoted or indirectly quoted someone who said :

If you later export that local reference to another thread or object, it
should be fine. It's valid to synchronize on a object that some other
part of the system will see later.

I have a JTable. I get a row put it in a local variable and
synchronise on that. Does that not lock anyone else getting that
row, even if they have nothing to do with my local variable?

 AppToWatch row;
 synchronized ( ALL_ROWS )
                row = ALL_ROWS.get( rowIndex );
                state = row.getState();
  synchronized ( row )
                    url = row.getVersionURL();
                    marker = row.getMarker();
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