We are now going to write a minimal client program which will perform the following operations:
initialize the EyeDB and person
packages
connect to the EyeDB server
open a database
creates two person instances and mary them
Example 5.1, “A Java minimal client” shows the code for a minimal Java client:
Example 5.1. A Java minimal client
// // Persontest.java // import person.*; class PersonTest { public static void main(String args[]) { // Initialize the eyedb package and parse the default eyedb options // on the command line String[] outargs = org.eyedb.Root.init("PersonTest", args); // Check that a database name is given on the command line int argc = outargs.length; if (argc != 1) { System.err.println("usage: java PersonTest dbname"); System.exit(1); } try { // Initialize the person package person.Database.init(); // Open the connection with the backend org.eyedb.Connection conn = new org.eyedb.Connection(); // Open the database named outargs[0] person.Database db = new person.Database(outargs[0]); db.open(conn, org.eyedb.Database.DBRW); db.transactionBegin(); // Create two persons john and mary Person john = new Person(db); john.setFirstname("john"); john.setLastname("travolta"); john.setAge(26); Person mary = new Person(db); mary.setFirstname("mary"); mary.setLastname("stuart"); mary.setAge(22); // Mary them ;-) john.setSpouse(mary); // Store john and mary in the database john.store(org.eyedb.RecMode.FullRecurs); john.trace(); db.transactionCommit(); } catch(org.eyedb.Exception e) { // Catch any eyedb exception e.print(); System.exit(1); } } }