Simplifying Coherence queries
As you have probably realized by now, Coherence queries can become quite cumbersome to create as the number of attributes used within the query grows, especially if non-default value extractors need to be used.
One, and possibly the best, approach would be to implement a real query language. We could define a grammar for Coherence queries that would be used to parse a SQL-like query string into a parse tree representing a Coherence filter. This would actually be fairly straightforward, as grammar elements would map pretty much directly to the built-in filters provided by Coherence.
However, this would distract us from the main topic of the book and lead us into the discussion of topics such as language grammars and ...
Get Oracle Coherence 3.5 now with the O’Reilly learning platform.
O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.
