Transaction Processing

..\sdk\sql.jdbc\tutorials\JDBC_Tutorial4.java

Now we will discuss transaction processing as it relates to the c-treeACE SQL JDBC Interface.

Transaction processing provides a safe method by which multiple database operations spread across separate tables/files are guaranteed to be atomic. By atomic, we mean that, within a transaction, either all of the operations succeed or none of the operations succeed. This "either all or none" atomicity insures that the integrity of the data in related tables/files is secure.

Like all other examples in the c-tree tutorial series, this tutorial simplifies the creation and use of a database into four simple steps: Initialize(), Define(), Manage(), and You’re Done() !

Tutorial #4: Transaction Processing

Here we demonstrate transaction control.

• Initialize() - Connects to the c-treeACE Database Engine.
• Define() - Defines and creates our four tables/files.
• Manage() - Adds rows/records to multiple tables/files under transaction control.
• Done() - Disconnects from c-treeACE Database Engine.

Note our simple mainline:

import java.sql.*;

import java.io.*;

public class JDBC_Tutorial4 {

   static Connection conn;

   static Statement stmt;

   //

   // main()

   //

   // The main() function implements the concept of "init, define, manage

   // and you're done..."

   //

   public static void main (String[] args)

      throws java.io.IOException

   {

      Initialize();

      Define();

      Manage();

      Done();

      System.out.print("\nPress <ENTER> key to exit . . .");

      System.in.read();

      System.exit(0);

   }

We suggest opening the source code with your own editor.

Continue now to review these four steps.