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package test;
import plc.*;
// pour les exceptions de apache
//import org.apache.commons.exception.NestableRuntimeException;
// pour l'utilisation de collection et d'iterator
import java.util.*;
// pour la persistence (broker)
import org.apache.ojb.broker.*;
import org.apache.ojb.broker.query.*;
import java.sql.*;
public class TestPLCDatabase {
private static PersistenceBroker broker = null;
public static void main(String[] args) {
// 1) creer un objet et le rendre persistent
Plc plc = new Plc();
// on renseigne qq attributs
plc.setMacAddress("00:00:00:00:00:00");
plc.setIpAddress("137.138.49.233");
plc.setPort(80);
// enregistrement ds la base
storePLC(plc);
//-------------------------
// 2) mise a jour d'un objet existant
updatePLC(plc);
//-------------------------
// 3) effectuer des requetes sur la base et exploiter le resultat
try {
broker = PersistenceBrokerFactory.defaultPersistenceBroker();
}
catch(Throwable t) {
t.printStackTrace();
}
/*
* Il faut debuter une transaction avant chaque acces a la base
* en vue de respecter les conditions A.C.I.D d'une base
*/
try {
broker.beginTransaction();
System.out.println("Transaction");
}
catch(Exception e) {
System.out.println("Impossible de commencer la transaction : "+e);
}
// creation de critere de requete
Criteria crit = new Criteria();
// ????????????????
crit.addEqualTo("port", new Integer(80));
crit.addEqualTo("rack", new Integer(0));
crit.addEqualTo("initialValidity", "today");
// ????????????????
// creation de la requete
Query q = new QueryByCriteria(Plc.class, crit);
// execution de la requete
try {
Collection results = broker.getCollectionByQuery(q);
Iterator iter = results.iterator();
while(iter.hasNext()) {
Plc tmp = (Plc)iter.next();
System.out.println("Ip : "+tmp.getIpAddress());
System.out.println("port : "+tmp.getPort());
System.out.println("rack : "+tmp.getRack());
}
}
catch(Exception e) {
System.out.println("Exception 2 : "+e);
}
finally {
if(broker != null) broker.close();
}
// commit de la transaction pour liberer la base
broker.commitTransaction();
}
public static void storePLC(Plc toStore) {
PersistenceBroker broker = null;
try {
System.out.println("coucou1");
broker = PersistenceBrokerFactory.defaultPersistenceBroker();
System.out.println("coucou2");
broker.beginTransaction();
broker.store(toStore);
broker.commitTransaction();
}
catch(PersistenceBrokerException e) {
if(broker != null) broker.abortTransaction();
System.out.println("Exception : " + e);
}
finally {
if(broker != null) broker.close();
}
}
public static void updatePLC(Plc toUpdate) {
PersistenceBroker broker = null;
try {
broker = PersistenceBrokerFactory.defaultPersistenceBroker();
QueryByCriteria query = new QueryByCriteria(toUpdate);
Plc result = (Plc)broker.getObjectByQuery(query);
if(result != null) {
broker.beginTransaction();
result.setRack(0);
result.setSlot(2);
broker.store(result);
broker.commitTransaction();
}
}
catch(PersistenceBrokerException e) {
if(broker != null) broker.abortTransaction();
System.out.println("Exception : " + e);
}
finally {
if(broker != null) broker.close();
}
}
} |
