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Java Open Source » Database ORM » Speedo_1.4.5 
Speedo_1.4.5 » simplereference » Main.java
/**
 * Copyright (C) 2001-2006 France Telecom R&D
 */
package simplereference;

import org.objectweb.util.monolog.api.BasicLevel;

import java.util.ArrayList;
import java.util.Collection;
import java.util.Iterator;
import java.util.List;

import javax.jdo.PersistenceManager;
import javax.jdo.Query;

import common.MainHelper;

public class Main extends MainHelper {

    public static void main(String[] args) {
        new Main().init(args).run().end();
    }
    
    public MainHelper run() {
        final int nbDep = 3;
        final int nbEmp = 20;
        List deps = new ArrayList(nbDep);
        for (int i = 0; i < nbDep; i++) {
            Department d = new Department();
            d.setName("department_" + i);
            deps.add(d);
        }
        List emps = new ArrayList(nbEmp);
        for (int i = 0; i < nbEmp; i++) {
            Employee e = new Employee();
            e.setSsn("employee_" + i);
            e.setDepartment((Department) deps.get(i % nbDep));
            emps.add(e);
        }
        logger.log(BasicLevel.INFO, "Create " + nbDep + "' department :" + deps);
        PersistenceManager pm = pmf.getPersistenceManager();
        pm.currentTransaction().begin();
        pm.makePersistentAll(emps);
        pm.currentTransaction().commit();

        logger.log(BasicLevel.INFO, "Empty Cache.");
        emps.clear();
        deps.clear();
        pm.evictAll();
        
        pm.currentTransaction().begin();
        logger.log(BasicLevel.INFO, "Find Employees.");
        Query q = pm.newQuery(Employee.class);
        q.setFilter("department.name == p1");
        q.declareParameters("String p1");
        Collection c = (Collection) q.execute("department_" + (nbDep - 1));
        for (Iterator it = c.iterator(); it.hasNext();) {
            Employee e = (Employee) it.next();
            logger.log(BasicLevel.INFO, "- Employee found:" + e.toString());
        }
        q.closeAll();
        pm.currentTransaction().commit();
        
        pm.currentTransaction().begin();
        q = pm.newQuery(Employee.class);
        c = (Collection) q.execute();
        emps.addAll(c);
        q.closeAll();
        q = pm.newQuery(Department.class);
        c = (Collection) q.execute();
        deps.addAll(c);
        q.closeAll();
        logger.log(BasicLevel.INFO, "Delete " + deps.size() + " departments.");
        pm.deletePersistentAll(deps);
        logger.log(BasicLevel.INFO, "Delete " + emps.size() + " employees.");
        pm.deletePersistentAll(emps);
        pm.currentTransaction().commit();
        pm.close();
        return this;
    }

}
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