MySQLConnectionTest.java

package test.prefuse.data.io.sql;

import java.util.logging.Logger;

import javax.swing.JFrame;

import junit.framework.TestCase;
import prefuse.data.Table;
import prefuse.data.io.sql.ConnectionFactory;
import prefuse.data.io.sql.DatabaseDataSource;
import prefuse.util.ui.JPrefuseTable;
import test.prefuse.TestConfig;

public class MySQLConnectionTest extends TestCase {

    // logger
    private static final Logger s_logger 
        = Logger.getLogger(MySQLConnectionTest.class.getName());
    
    private Table m_table;
    
    public void testLoadFromMySQLDatabase() {
        String host     = "localhost";
        String database = "friendster";
        String user     = "anonymous";
        String password = "";
        
        String keyField = "uid";
        String query1   = "SELECT profiles.* FROM profiles, graph WHERE " +
            "(graph.uid1 = 186297 AND profiles.uid = graph.uid2)";
        String query2   = "SELECT profiles.* FROM profiles, graph WHERE " +
            "(graph.uid1 = 21721 AND profiles.uid = graph.uid2)";
        
        //String query    = "SELECT gender, age, COUNT(*) FROM profiles GROUP BY gender,age";
        
        s_logger.info(TestConfig.memUse());
        
        Table t = null;
        try {
            DatabaseDataSource db = ConnectionFactory.getMySQLConnection(
                    host, database, user, password);
            
            s_logger.info(TestConfig.memUse());
            
            t = db.getData(t, query1, keyField);
            db.loadData(t, query2, keyField);
            
        } catch ( Exception e ) {
            e.printStackTrace();
            fail("Error connecting to database");
        }
        
        // text-dump
        StringBuffer sbuf = new StringBuffer('\n');
        sbuf.append("--[Table: ").append(t.getRowCount()).append(" rows, ")
            .append(t.getColumnCount()).append(" cols]--\n");
        for (int c = 0, idx = -1; c < t.getColumnCount(); ++c) {
            String name = t.getColumnType(c).getName();
            if ( (idx=name.lastIndexOf('.')) >= 0 )
                name = name.substring(idx+1);
            sbuf.append(c).append("\t").append(name).append("\t")
                .append(t.getColumnName(c)).append('\n');
        }
        sbuf.append('\n');
        sbuf.append(TestConfig.memUse()).append('\n');
        s_logger.info(sbuf.toString());
        
        m_table = t;
    }
    
    public static void main(String[] args) {
        MySQLConnectionTest test = new MySQLConnectionTest();
        test.testLoadFromMySQLDatabase();
        
        JFrame f = JPrefuseTable.showTableWindow(test.m_table);
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    }
    
}