Thanks thats a good idea, we actually found one just a couple of days ago that is
similar, but doesnt require inheritance.
Create a wraperclass, lets call it "SQLExer" and have it implement execute(), which
just does the logic below.
Funny you should metion smalltalk blocks, I was just mentioning to some co-workers
that that would be the perfect solution for this problem :)
-thanks
Joel
Per Spilling wrote:
> Hi Joel,
>
> I would suggest using a base class which implements the common functionality in a
> generic way, combined with inner classes used as codeblocks (in the Smalltalk
> tradition) which are passed to the baseclass, i.e. something like this:
>
> public interface SqlStatment() {
> public Result execute();
> };
>
> public class MyEjbBase {
> public Result executeSql( SqlStatement s )
> {
> while ((retryCount < maxRetries) && (!success))
> {
> try {
> result = s.execute()
> success = true
> } catch(SqlException sqe) {
> retryCount = retryCount + 1
> } finally {
> ...
> }
> return result;
> }
> }
> }
>
> public class DerivedEjb extends MyEjbBase {
> public void ejbFindByPrimaryKey()
> {
> ...
> result = executeSql( new SqlStatement() { ... } );
> ...
> }
> }
>
> etc.
>
> -Per
>
> --
> Per Spilling <[EMAIL PROTECTED]>
> Objectware AS, Slemdalsveien 37, Pb. 137 Vinderen, 0319 Oslo, Norway
> Tel: +47 23199200 Mobile: +47 90915115 Fax: +47 23199201
>
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