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SIGMOD '96 Proceedings of the 1996 ACM SIGMOD international conference on Management of data
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VLDB '99 Proceedings of the 25th International Conference on Very Large Data Bases
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USITS'97 Proceedings of the USENIX Symposium on Internet Technologies and Systems on USENIX Symposium on Internet Technologies and Systems
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FAST'03 Proceedings of the 2nd USENIX conference on File and storage technologies
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Middleware'06 Proceedings of the 7th ACM/IFIP/USENIX international conference on Middleware
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Middleware'11 Proceedings of the 12th ACM/IFIP/USENIX international conference on Middleware
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ASE '11 Proceedings of the 2011 26th IEEE/ACM International Conference on Automated Software Engineering
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DBSocial '12 Proceedings of the 2nd ACM SIGMOD Workshop on Databases and Social Networks
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This paper describes how caching was used to improve performance in the Accessible Business Rules framework (ABR) for IBM's Websphere. ABR is a middleware system which enables application writers to build applications where the time and situation-variable parts of their business logic are externally applied entities known as business rules. The cache significantly reduced the number of queries to remote databases by storing query results. A key problem we faced was how to keep the cache current after database updates. This was solved using data update propagation (DUP). Two enhancements we made to DUP were to employ an update strategy which considers the values of database updates in order to perform intelligent cache invalidations and to automatically compute dependencies using compile and run-time analysis. Our techniques can be applied to other caching environments besides ABR. We show how our cache invalidation strategies perform for applications with database updates having queries similar to those in the Set Query benchmark.