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Part I: Java in the Database > Pragmatic Applications Using Java in the Databas...

4. Pragmatic Applications Using Java in the Database

JDBC-style applications (i.e., a mix of Java and SQL) are the typical Java applications for the database, commonly known as Java stored procedures. As illustrated in Chapter 1, JDBC applications will likely run faster in the database because there is only one roundtrip and the proximity with the SQL layer (same memory space). This chapter walks you through a few examples of atypical Java applications in the database that implement new database functionality simply by using standard Java libraries. The examples include secure credit card processing using JSSE, calling out a non-Oracle database using a pure Java foreign JDBC driver, Calling Out to SAP Systems using SAP JCO, Using Java in the database and J2EE in the Middle tier Together (calling out to EJB, calling out to Web components using HTTP, JMS over Oracle streams/AQ), and an Excel-like expressions evaluator. These applications are either self-sufficient solutions for tactical needs or building blocks for more complete, complex, or strategic frameworks running in the database.


  

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