By Kuassi Mensah
The conventional department of work among the database (which merely shops and manages SQL and XML facts for quick, effortless facts seek and retrieval) and the applying server (which runs program or enterprise good judgment, and presentation common sense) is out of date. even supposing the books fundamental concentration is on programming the Oracle Database, the techniques and strategies supplied follow to such a lot RDBMS that aid Java together with Oracle, DB2, Sybase, MySQL, and PostgreSQL. this is often the 1st ebook to hide new Java, JDBC, SQLJ, JPublisher and net providers positive factors in Oracle Database 10g unencumber 2 (the insurance starts off with Oracle 9i unencumber 2). This publication is a must-read for database builders viewers (DBAs, database purposes builders, info architects), Java builders (JDBC, SQLJ, J2EE, and OR Mapping frameworks), and to the rising internet companies assemblers.
* Describes pragmatic suggestions, complicated database functions, in addition to provision of a wealth of code samples
* Addresses programming types which run in the database in addition to programming types which run in middle-tier or client-tier opposed to the database.
* Discusses languages for kept approaches: while to exploit proprietary languages equivalent to PL/SQL and while to exploit average languages resembling Java; additionally working non-Java scripting languages within the database
* Describes the Java runtime within the Oracle database 10g (i.e., OracleJVM), its structure, reminiscence administration, protection administration, threading, Java execution, the local Compiler (i.e., NCOMP), the right way to make Java identified to SQL and PL/SQL, facts kinds mapping, find out how to call-out to exterior net elements, EJB elements, ERP frameworks, and exterior databases.
* Describes JDBC programming and the recent Oracle JDBC 10g beneficial properties, its complicated connection providers (pooling, failover, load-balancing, and the short database occasion notification mechanism) for clustered databases (RAC) in Grid environments.
* Describes SQLJ programming and the newest Oracle SQLJ 10g gains , contrasting it with JDBC
* Describes the most recent Database net companies good points, internet prone thoughts and prone orientated structure (SOA) for DBA, the database as net companies supplier and the database as internet prone consumer.
* Abridged assurance of JPublisher 10g, a flexible supplement to JDBC, SQLJ and Database net companies.
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Extra info for Oracle Database Programming using Java and Web Services
Example text
Finally, just for fun, in Chapter 5, you will run basic JACL, Jython, Scheme, and Groovy scripts in the data1. See Oracle JDBC, Oracle SQLJ, and JPublisher in Part II; then Database Web Services in Part III; and Putting Everything Together in Part IV. 2 There is a growing adoption of Java in the database, among DBAs and database developers, and after reading this book, you will probably become an aficionado, if that is not already the case! 2. I must say that this proof of concept does not correspond to any Oracle product plan.
X in Oracle Database 10g (Release 1 and 2). 3 How Is Java Stored in the Database? The JDK VM stores, loads, and runs Java sources/classes from the file system; the OracleJVM stores each Java class (and derived classes), its source, the potential/optional Java resources (used for properties and miscellaneous needs), and the metadata in a managed, stand-alone database object called “libunit” (short for library unit). Let’s see the storage structures involved. Where Is the Java Source Stored? Unlike PL/SQL sources, which are stored in human-readable format as VARCHAR columns of system tables, Java sources are stored in nonhumanreadable format as Opaque types,1 using UTF8 character set, in internal system tables.
Support for large Java programs has been addressed by designing efficient memory management. Robustness, or resilience, was another requirement that was addressed through the integration with the RDBMS session model. 1 Tight Integration with the RDBMS The tight integration with the RDBMS consists of allowing Java to execute in the same address space as SQL and PL/SQL, while making no compromise on security and data integrity. This goal was accomplished by espousing the session model of the Oracle database.