So far we've learned how to create events, assemble, and configure Oracle Event Processing applications. You've learned how CQL is used to process incoming data streams. Sometimes incoming data streams do not contain all of the information that we need for the business logic. In most instances, incoming data streams contain some information about a current transaction, but other information such as customer alert preferences are contained elsewhere. This contextual information is often held in a database table and ideally for low latency applications, pushed to an in-memory cache. It is also sometimes convenient to have application-specific thresholds or other contextual information in a cache as well for lower latency access to drive better application performance.
This chapter will cover the following topics:
Setting up JDBC data sources
Enriching events using a database table
Setting up caching systems
Enriching events using a cache
Using...