Re: visad.TypeException: ScalarType: name already used

• To: visad-list@xxxxxxxxxxxxx
• Subject: Re: visad.TypeException: ScalarType: name already used
• From: "William L. Hibbard" <WHIBBARD@xxxxxxxxxxxxx>
• Date: Tue, 07 Jul 1998 05:27 CST

On consideration, I recommend Dave's solution:
 
        RealType X;
        try {
          X = new RealType("X",null,null);
        } catch (TypeException e) {
          X = RealType.getRealTypeByName("X");
        }
 
because its thread safe.  My initial solution:
 
  RealType X = RealType.getRealTypeByName("X");
  if (X == null) X = new RealType("X",null,null);
 
is not, because another thread can construct a
'RealType("X",null,null)' between my calls to
'getRealTypeByName' and 'new RealType'.
 
----------------------------------------------------------
Bill Hibbard, SSEC, 1225 W. Dayton St., Madison, WI  53706
whibbard@xxxxxxxxxxxxx  608-263-4427  fax: 608-263-6738
http://www.ssec.wisc.edu/~billh/vis.html
 
"kill cross-platform Java by growing the polluted Java market"
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