August 2000
Intermediate to advanced
348 pages
8h 51m
English
Content preview from Database Programming with JDBC & Java, Second EditionBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.
Distributed Transactions
You have only one more element of JDBC to cover—distributed transactions. All database access you have dealt with so far involves transactions against a single database. In this environment, your DBMS manages the details of each transaction. This support is good enough for most database applications. As companies move increasingly towards an enterprise model of systems development, however, the need for supporting transactions against multiple databases grows. Where single data source transactions are the rule today, they will likely prove the exception in business computing in the future.
Distributed transactions are transactions that span two or more data sources. For example, you may have an Informix data source containing your corporate digital media assets and an Oracle database holding your corporate data. When you delete product information for an obsolete product line stored in the Oracle database, you need to know that the commercials and web images stored in Informix database have been deleted as well. Without support for distributed transactions, you are forced to handle the delete in two separate transactions: one against Oracle and the other against Informix. If the commit against Oracle succeeds but the Informix commit fails, you end up with inconsistent data.
Of course, you may simply avoid the issue by selecting either Oracle or Informix to store all of your corporate data. If you choose a nice supercomputer with terabytes of hard disk space ...
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.
Read now
Unlock full access
More than 5,000 organizations count on O’Reilly
O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.