Timeout MySQL au bout de 8 heures

**peofofo** · 11/01/2012, 12h35

Bonjour à tous,

J'utilise JDBC, pour me connecter a MYSQL.
Mais seulement voilà, J'ai au bout de 8 heures d'ouverture de connection un timeout qui me provoque une erreur:
com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure
The last packet successfully received from the server was 45 496 828 milliseconds ago.
The last packet sent successfully to the server was 1 milliseconds ago.

le Wait Time out est configuré:
wait timeout : 28 800
Equivalent de 8heures.

Grosso-modo, j'ouvre la connexion et je ne la referme jamais.
Car si je la ferme et la ré-ouvre a chaque requête, j'ai l'erreur: "too many connections"

Voici mon code:
JdbcConnector

Code :

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public class JdbcConnector {
	static Logger logger = Logger.getLogger("JdbcConnector.class");
	private static Connection connect;
 
	/**
         * Méthode qui va retourner notre instance
         * et la créer si elle n'existe pas...
         * @return
         */
	public static Connection getInstance(){
		try {
			if(connect == null || connect.isClosed()){
				try {
					//On regarde les préférences:
					Serializer<Preferences> preferences = new Serializer<Preferences>(new File("file/Pito.lic"));
					preferences.lectureserialize();
					Serializer<Licence> licence = new Serializer<Licence>(new File("file/sack.lic"));
					licence.lectureserialize();
					String serveur=(licence.getObject()!=null && licence.getObject().getType_licence().equals("normal"))?"localhost":preferences.getObject().getServeur();
					if(preferences.getFile().length() > 0 && preferences.getObject().isConnection_bdd()){
						logger.info("Lecture Préférence: "+preferences.getObject().toString());
						Properties props = new Properties();
						props.setProperty("user",preferences.getObject().getUtilisateur());
						props.setProperty("password",preferences.getObject().getPassword());
						props.setProperty("autoReconnect", "true");
						connect = DriverManager.getConnection("jdbc:mysql://"+serveur+"/"+preferences.getObject().getBase(),props);
						logger.info("Connection a la base de donnée: "+connect);
					}
					else{
						connect=null;
						JOptionPane.showMessageDialog(null, "Impossible de se connecter!", "ERREUR DE CONNEXION ! ", JOptionPane.ERROR_MESSAGE);
					}
				} catch (SQLException e) {
					JOptionPane.showMessageDialog(null, e.getMessage(), "ERREUR DE CONNEXION ! ", JOptionPane.ERROR_MESSAGE);
				}
			}
		} catch (HeadlessException e) {
			e.printStackTrace();
			JOptionPane.showMessageDialog(null, e.getMessage(), "ERREUR DE CONNEXION ! ", JOptionPane.ERROR_MESSAGE);
		} catch (SQLException e) {
			e.printStackTrace();
			JOptionPane.showMessageDialog(null, e.getMessage(), "ERREUR DE CONNEXION ! ", JOptionPane.ERROR_MESSAGE);
		}
		return connect;	
	}
 
	public static void test_connection(String serveur, String base, String utilisteur, String passe) {
		// TODO Auto-generated method stub
		try {
			connect = DriverManager.getConnection("jdbc:mysql://"+serveur+"/"+base, utilisteur, passe);
			JOptionPane.showMessageDialog(null, "La connection avec la base de donnée est réussi!", "CONNECTION A LA BASE MYSL AVEC SUCCES! ", JOptionPane.INFORMATION_MESSAGE);
		} catch (HeadlessException e) {
			e.printStackTrace();
			JOptionPane.showMessageDialog(null, e.getMessage(), "ERREUR DE CONNEXION ! ", JOptionPane.ERROR_MESSAGE);
		} catch (SQLException e) {
			e.printStackTrace();
			JOptionPane.showMessageDialog(null, e.getMessage(), "ERREUR DE CONNEXION ! ", JOptionPane.ERROR_MESSAGE);
		}
 
	}
 
}

Classe MembresDao extends DAO<Membres>

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public ArrayList<Membres> select(String champ, String valeur, int admin) {
		connect= JdbcConnector.getInstance();
		try {
			Statement state = this.connect.createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE,ResultSet.CONCUR_READ_ONLY);
	            PreparedStatement prepare = this.connect.prepareStatement(
	            		"SELECT m.id, m.nom, m.prenom, m.passe, m.solde, m.afficher, m.admin, m.forfait "+
	            		"FROM membres m " +
	            		"WHERE `"+champ+"`=? " +
	            		"ORDER BY m.nom, m.prenom ASC");
 
	            //On paramètre notre requête préparée
	            prepare.setString(1, valeur);
 
		//On exécute la requête
		ResultSet resultat = prepare.executeQuery();
		int i=0;
		while(resultat.next()){
			table.add(i, new Membres(resultat.getInt("m.id"), resultat.getString("m.nom"), resultat.getString("m.prenom"), resultat.getString("m.passe"), 
							resultat.getFloat("m.solde"), resultat.getInt("m.afficher"), resultat.getInt("m.admin"), resultat.getInt("m.forfait")));
			i++;
		}
 
		prepare.close();
   	 	state.close();
 
		} catch (SQLException e) {
			e.printStackTrace();
	    }
		return table;
	}

Je vous remercie pour vos réponses

**sinok** · 11/01/2012, 18h36

Utiliser un pool de connexions (tel que DBCP) et relâcher systématiquement les connexion en faisant un close des éléments (connexion+resultset+statement) dans le bloc finally correspondant au try/catch de tes opérations SQL.

**peofofo** · 14/01/2012, 10h16

Merci Sinok pour la réponse,

J'ai télécharger les bibliothèque et testé le code d'exemple:
http://svn.apache.org/viewvc/commons...va?view=markup

En modifiant la classe de l'exemple, ça me donne:

Code :

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/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
 
import java.sql.DriverManager;
import java.sql.Connection;
import java.sql.Statement;
import java.sql.ResultSet;
import java.sql.SQLException;
 
//
// Here are the dbcp-specific classes.
// Note that they are only used in the setupDriver
// method. In normal use, your classes interact
// only with the standard JDBC API
//
import org.apache.commons.pool.ObjectPool;
import org.apache.commons.pool.impl.GenericObjectPool;
import org.apache.commons.dbcp.ConnectionFactory;
import org.apache.commons.dbcp.PoolingDriver;
import org.apache.commons.dbcp.PoolableConnectionFactory;
import org.apache.commons.dbcp.DriverManagerConnectionFactory;
 
//
// Here's a simple example of how to use the PoolingDriver.
//
 
//
// To compile this example, you'll want:
//  * commons-pool-1.5.6.jar
//  * commons-dbcp-1.3.jar (JDK 1.4-1.5) or commons-dbcp-1.4 (JDK 1.6+)
// in your classpath.
//
// To run this example, you'll want:
//  * commons-collections.jar
//  * commons-pool-1.5.6.jar
//  * commons-dbcp-1.3.jar (JDK 1.4-1.5) or commons-dbcp-1.4 (JDK 1.6+)
//  * the classes for your (underlying) JDBC driver
// in your classpath.
//
// Invoke the class using two arguments:
//  * the connect string for your underlying JDBC driver
//  * the query you'd like to execute
// You'll also want to ensure your underlying JDBC driver
// is registered.  You can use the "jdbc.drivers"
// property to do this.
//
// For example:
//  java -Djdbc.drivers=oracle.jdbc.driver.OracleDriver \
//       -classpath commons-pool-1.5.6.jar:commons-dbcp-1.4.jar:oracle-jdbc.jar:. \
//       PoolingDriverExample \
//       "jdbc:oracle:thin:scott/tiger@myhost:1521:mysid" \
//       "SELECT * FROM DUAL"
//
public class PoolingDriverExample {
 
    public static void main(String[] args) {
        //
        // First we load the underlying JDBC driver.
        // You need this if you don't use the jdbc.drivers
        // system property.
        //
        System.out.println("Loading underlying JDBC driver.");
        try {
            Class.forName("org.gjt.mm.mysql.Driver");
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        }
        System.out.println("Done.");
 
        //
        // Then we set up and register the PoolingDriver.
        // Normally this would be handled auto-magically by
        // an external configuration, but in this example we'll
        // do it manually.
        //
        System.out.println("Setting up driver.");
        try {
            setupDriver(args[0]);
        } catch (Exception e) {
            e.printStackTrace();
        }
        System.out.println("Done.");
 
        //
        // Now, we can use JDBC as we normally would.
        // Using the connect string
        //  jdbc:apache:commons:dbcp:example
        // The general form being:
        //  jdbc:apache:commons:dbcp:<name-of-pool>
        //
 
        Connection conn = null;
        Statement stmt = null;
        ResultSet rset = null;
 
        try {
            System.out.println("Creating connection.");
			conn = DriverManager.getConnection("jdbc:mysql://localhost/bcsg", "peofofo", "test");
            System.out.println("Creating statement.");
            stmt = conn.createStatement();
            System.out.println("Executing statement.");
            rset = stmt.executeQuery(args[1]);
            System.out.println("Results:");
            int numcols = rset.getMetaData().getColumnCount();
            while(rset.next()) {
                for(int i=1;i<=numcols;i++) {
                    System.out.print("\t" + rset.getString(i));
                }
                System.out.println("");
            }
        } catch(SQLException e) {
            e.printStackTrace();
        } finally {
            try { if (rset != null) rset.close(); } catch(Exception e) { }
            try { if (stmt != null) stmt.close(); } catch(Exception e) { }
            try { if (conn != null) conn.close(); } catch(Exception e) { }
        }
 
        // Display some pool statistics
        try {
            printDriverStats();
        } catch (Exception e) {
            e.printStackTrace();
        }
 
        // closes the pool
        try {
            shutdownDriver();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
 
    public static void setupDriver(String connectURI) throws Exception {
        //
        // First, we'll create a ConnectionFactory that the
        // pool will use to create Connections.
        // We'll use the DriverManagerConnectionFactory,
        // using the connect string passed in the command line
        // arguments.
        //
        ConnectionFactory connectionFactory =
            new DriverManagerConnectionFactory(connectURI,null);
 
        //
        // Next, we'll create the PoolableConnectionFactory, which wraps
        // the "real" Connections created by the ConnectionFactory with
        // the classes that implement the pooling functionality.
        //
        PoolableConnectionFactory poolableConnectionFactory =
            new PoolableConnectionFactory(connectionFactory, null, null, connectURI, false, false);
 
        //
        // Now we'll need a ObjectPool that serves as the
        // actual pool of connections.
        //
        // We'll use a GenericObjectPool instance, although
        // any ObjectPool implementation will suffice.
        //
        ObjectPool connectionPool =
            new GenericObjectPool(poolableConnectionFactory);
 
        //
        // Finally, we create the PoolingDriver itself...
        //
        Class.forName("org.apache.commons.dbcp2.PoolingDriver");
        PoolingDriver driver = (PoolingDriver) DriverManager.getDriver("jdbc:apache:commons:dbcp:");
 
        //
        // ...and register our pool with it.
        //
        driver.registerPool("example",connectionPool);
 
        //
        // Now we can just use the connect string "jdbc:apache:commons:dbcp:example"
        // to access our pool of Connections.
        //
    }
 
    public static void printDriverStats() throws Exception {
        PoolingDriver driver = (PoolingDriver) DriverManager.getDriver("jdbc:apache:commons:dbcp:");
        ObjectPool connectionPool = driver.getConnectionPool("example");
 
        System.out.println("NumActive: " + connectionPool.getNumActive());
        System.out.println("NumIdle: " + connectionPool.getNumIdle());
    }
 
    public static void shutdownDriver() throws Exception {
        PoolingDriver driver = (PoolingDriver) DriverManager.getDriver("jdbc:apache:commons:dbcp:");
        driver.closePool("example");
    }
}

Mais dans la console, j'ai encore des erreurs lié a l'argument du main:

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Loading underlying JDBC driver.
Done.
Setting up driver.
java.lang.ArrayIndexOutOfBoundsException: 0
Done.
Creating connection.
	at PoolingDriverExample.main(PoolingDriverExample.java:92)
Creating statement.
Executing statement.
Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 1
	at PoolingDriverExample.main(PoolingDriverExample.java:116)

Je ne vois pas trop comment ajouter ce code ensuite dans méthode getInstance() (dans le premier post)

Merci encore

**tchize_** · 14/01/2012, 23h22

Envoyé par peofofo

Grosso-modo, j'ouvre la connexion et je ne la referme jamais.
Car si je la ferme et la ré-ouvre a chaque requête, j'ai l'erreur: "too many connections"

C'est que vous vous contentez d'en ouvrir de nouvelles sas fermer les connexions.

**peofofo** · 16/01/2012, 09h05

Merci Tchize,

En faite si je ne ferme jamais les connections je n'ai pas l'erreur "too many connections" mais un timeout sur l'ouverture de connexion.
Par contre si je ferme sur chaque requête la connexion, sur certaines pages j'ai l'erreur "too many connections".
Sur une seule action, je peux effectuer une quinzaine de requêtes.

Je pense que la réponse de Sinok est la solution, mais je n'arrive pas faire fonctionner l'exemple de la bibliothèque de dbcp.
Et je ne comprend pas trop le principe et comment l'appliqué a mon code sur le premier post?

En vous remerciant

**tchize_** · 16/01/2012, 09h59

Envoyé par peofofo

Par contre si je ferme sur chaque requête la connexion, sur certaines pages j'ai l'erreur "too many connections".

Non, justement, si vous avez cette erreur c'est justement parceque certaines connexions restent ouvertes.

**peofofo** · 16/01/2012, 11h53

Actuellement, le code que j'utilise n'a aucune fermeture de connexion.
Et j'ai une condition Si connexion ouverte, on ne la ré-ouvre pas.
Ce code provoque un timeout au bout de 8 heures.
Et si je met la clause finally sur chaque requête -> fermeture de connexion , j'ai l'erreur "too many connections"
De plus le temps de chargement est multiplié par 4 voir plus.
Donc l'objectif n'est pas de faire ralentir le process.
Si tu as un code d'exemple ou je peux m'inspirer.

Encore merci

**sinok** · 16/01/2012, 12h19

exemple propre de gestion des connexions JDBC

Code :

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Connection c = null;
PreparedStatement stmt = null;
ResultSet rs = null;
try {
	try {
		//On récupère la connexion de la ou elle est, drive/datasource/whatever
		c = DriverManager.getConnection("jdbc:mysql://"+serveur+"/"+preferences.getObject().getBase(),props);
		stmt = c.prepareStatement("SELECT m.id, m.nom, m.prenom, m.passe, m.solde, m.afficher, m.admin, m.forfait "+
			"FROM membres m " +
			"WHERE `"+champ+"`=? " +
			"ORDER BY m.nom, m.prenom ASC");
		prepare.setString(1, valeur);
 
		//On exécute la requête
		ResultSet resultat = prepare.executeQuery();
		int i=0;
		while(resultat.next()){
			table.add(i, new Membres(	resultat.getInt("m.id"), 
					resultat.getString("m.nom"), 
					resultat.getString("m.prenom"), 
					resultat.getString("m.passe"), 
					resultat.getFloat("m.solde"), 
					resultat.getInt("m.afficher"), 
					resultat.getInt("m.admin"), 
					resultat.getInt("m.forfait")
				)
			);
			i++;
		}
	} catch ( SQLException e) {
		e.printStacktrace();
	} finally {
		if (rs != null) {
			rs.close();
		} 
		if (stmt != null) {
			stmt.close();
		} 
		if (c != null) {
			c.close();
		} 
	}
} catch(SQLException e) {
	e.printStacktrace();
}

Cf la FAQ

**peofofo** · 18/01/2012, 11h32

Merci tchize_

J'ai voulu faire un test et j'ai obtenu ceci:

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public static Connection getInstance(){
		try {
			if(connect == null || connect.isClosed()){
				try {
					//On regarde les préférences:
					Serializer<Preferences> preferences = new Serializer<Preferences>(new File("file/Pito.lic"));
					preferences.lectureserialize();
					Serializer<Licence> licence = new Serializer<Licence>(new File("file/sack.lic"));
					licence.lectureserialize();
					String serveur=(licence.getObject()!=null && licence.getObject().getType_licence().equals("normal"))?"localhost":preferences.getObject().getServeur();
					if(preferences.getFile().length() > 0 && preferences.getObject().isConnection_bdd()){
 
						String base = preferences.getObject().getBase();
						String utilisteur=preferences.getObject().getUtilisateur();
						String passe=preferences.getObject().getPassword();
						System.out.println("Setting up data source.");
				        DataSource dataSource = setupDataSource("jdbc:mysql://"+serveur+"/"+base);
				        connect = dataSource.getConnection();
				        System.out.println("Done.");
					}
					else{
						connect=null;
						JOptionPane.showMessageDialog(null, "Impossible de se connecter!", "ERREUR DE CONNEXION ! ", JOptionPane.ERROR_MESSAGE);
					}
				} catch (SQLException e) {
					JOptionPane.showMessageDialog(null, e.getMessage(), "ERREUR DE CONNEXION ! ", JOptionPane.ERROR_MESSAGE);
				}
			}
		} catch (HeadlessException e) {
			e.printStackTrace();
			JOptionPane.showMessageDialog(null, e.getMessage(), "ERREUR DE CONNEXION ! ", JOptionPane.ERROR_MESSAGE);
		} catch (SQLException e) {
			e.printStackTrace();
			JOptionPane.showMessageDialog(null, e.getMessage(), "ERREUR DE CONNEXION ! ", JOptionPane.ERROR_MESSAGE);
		}
		return connect;	
	}
 
	public static void test_connection(String serveur, String base, String utilisteur, String passe) {
		// TODO Auto-generated method stub
		try {
			connect = DriverManager.getConnection("jdbc:mysql://"+serveur+"/"+base, utilisteur, passe);
			JOptionPane.showMessageDialog(null, "La connection avec la base de donnée est réussi!", "CONNECTION A LA BASE MYSL AVEC SUCCES! ", JOptionPane.INFORMATION_MESSAGE);
		} catch (HeadlessException e) {
			e.printStackTrace();
			JOptionPane.showMessageDialog(null, e.getMessage(), "ERREUR DE CONNEXION ! ", JOptionPane.ERROR_MESSAGE);
		} catch (SQLException e) {
			e.printStackTrace();
			JOptionPane.showMessageDialog(null, e.getMessage(), "ERREUR DE CONNEXION ! ", JOptionPane.ERROR_MESSAGE);
		}
 
	}
 
	 public static DataSource setupDataSource(String connectURI) {
	        //
	        // First, we'll create a ConnectionFactory that the
	        // pool will use to create Connections.
	        // We'll use the DriverManagerConnectionFactory,
	        // using the connect string passed in the command line
	        // arguments.
	        //
	        ConnectionFactory connectionFactory =
	            new DriverManagerConnectionFactory(connectURI,null);
 
	        //
	        // Next we'll create the PoolableConnectionFactory, which wraps
	        // the "real" Connections created by the ConnectionFactory with
	        // the classes that implement the pooling functionality.
	        //
	        PoolableConnectionFactory poolableConnectionFactory =
	            new PoolableConnectionFactory(connectionFactory, null, null, connectURI, false, false);
 
	        //
	        // Now we'll need a ObjectPool that serves as the
	        // actual pool of connections.
	        //
	        // We'll use a GenericObjectPool instance, although
	        // any ObjectPool implementation will suffice.
	        //
	        ObjectPool connectionPool =
	            new GenericObjectPool(poolableConnectionFactory);
 
	        //
	        // Finally, we create the PoolingDriver itself,
	        // passing in the object pool we created.
	        //
	        PoolingDataSource dataSource = new PoolingDataSource(connectionPool);
 
	        return dataSource;
	    }

J'ai l'erreur dans la console:

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FATAL - java.lang.NullPointerException
FATAL - 	at org.apache.commons.dbcp.PoolableConnectionFactory.<init>(PoolableConnectionFactory.java:54)

Je pense que ce problème vient de la variable String: "jdbc:mysql://"+serveur+"/"+base

Ce code vient des exemples sur dbcp :
http://svn.apache.org/viewvc/commons...143885&view=co

Merci pour votre aide

**tchize_** · 18/01/2012, 15h22

utilise new PoolableConnectionFactory(connectionFactory) plutot que la version avec plein de paramètre. Je pense qu'il ne digère pas tes null

**peofofo** · 19/01/2012, 08h33

Oui c'est ce que je voulais mettre, mais ce constructeur a un seul argument, n'existe pas.
Voici la classe PoolableConnectionFactory:

Code :

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package org.apache.commons.dbcp;
/*     */ 
/*     */ import java.sql.Connection;
/*     */ import java.sql.ResultSet;
/*     */ import java.sql.SQLException;
/*     */ import java.sql.Statement;
/*     */ import java.util.Collection;
/*     */ import java.util.Iterator;
/*     */ import org.apache.commons.pool.KeyedObjectPool;
/*     */ import org.apache.commons.pool.KeyedObjectPoolFactory;
/*     */ import org.apache.commons.pool.ObjectPool;
/*     */ import org.apache.commons.pool.PoolableObjectFactory;
/*     */ 
/*     */ public class PoolableConnectionFactory
/*     */   implements PoolableObjectFactory
/*     */ {
/* 722 */   protected volatile ConnectionFactory _connFactory = null;
/* 723 */   protected volatile String _validationQuery = null;
/* 724 */   protected volatile int _validationQueryTimeout = -1;
/* 725 */   protected Collection _connectionInitSqls = null;
/* 726 */   protected volatile ObjectPool _pool = null;
/* 727 */   protected volatile KeyedObjectPoolFactory _stmtPoolFactory = null;
/* 728 */   protected Boolean _defaultReadOnly = null;
/* 729 */   protected boolean _defaultAutoCommit = true;
/* 730 */   protected int _defaultTransactionIsolation = -1;
/*     */   protected String _defaultCatalog;
/* 736 */   protected AbandonedConfig _config = null;
/*     */   static final int UNKNOWN_TRANSACTIONISOLATION = -1;
/*     */ 
/*     */   public PoolableConnectionFactory(ConnectionFactory connFactory, ObjectPool pool, KeyedObjectPoolFactory stmtPoolFactory, String validationQuery, boolean defaultReadOnly, boolean defaultAutoCommit)
/*     */   {
/*  52 */     this._connFactory = connFactory;
/*  53 */     this._pool = pool;
/*  54 */     this._pool.setFactory(this);
/*  55 */     this._stmtPoolFactory = stmtPoolFactory;
/*  56 */     this._validationQuery = validationQuery;
/*  57 */     this._defaultReadOnly = ((defaultReadOnly) ? Boolean.TRUE : Boolean.FALSE);
/*  58 */     this._defaultAutoCommit = defaultAutoCommit;
/*     */   }
/*     */ 
/*     */   public PoolableConnectionFactory(ConnectionFactory connFactory, ObjectPool pool, KeyedObjectPoolFactory stmtPoolFactory, String validationQuery, Collection connectionInitSqls, boolean defaultReadOnly, boolean defaultAutoCommit)
/*     */   {
/*  73 */     this._connFactory = connFactory;
/*  74 */     this._pool = pool;
/*  75 */     this._pool.setFactory(this);
/*  76 */     this._stmtPoolFactory = stmtPoolFactory;
/*  77 */     this._validationQuery = validationQuery;
/*  78 */     this._connectionInitSqls = connectionInitSqls;
/*  79 */     this._defaultReadOnly = ((defaultReadOnly) ? Boolean.TRUE : Boolean.FALSE);
/*  80 */     this._defaultAutoCommit = defaultAutoCommit;
/*     */   }
/*     */ 
/*     */   public PoolableConnectionFactory(ConnectionFactory connFactory, ObjectPool pool, KeyedObjectPoolFactory stmtPoolFactory, String validationQuery, int validationQueryTimeout, boolean defaultReadOnly, boolean defaultAutoCommit)
/*     */   {
/*  95 */     this._connFactory = connFactory;
/*  96 */     this._pool = pool;
/*  97 */     this._pool.setFactory(this);
/*  98 */     this._stmtPoolFactory = stmtPoolFactory;
/*  99 */     this._validationQuery = validationQuery;
/* 100 */     this._validationQueryTimeout = validationQueryTimeout;
/* 101 */     this._defaultReadOnly = ((defaultReadOnly) ? Boolean.TRUE : Boolean.FALSE);
/* 102 */     this._defaultAutoCommit = defaultAutoCommit;
/*     */   }
/*     */ 
/*     */   public PoolableConnectionFactory(ConnectionFactory connFactory, ObjectPool pool, KeyedObjectPoolFactory stmtPoolFactory, String validationQuery, int validationQueryTimeout, Collection connectionInitSqls, boolean defaultReadOnly, boolean defaultAutoCommit)
/*     */   {
/* 118 */     this._connFactory = connFactory;
/* 119 */     this._pool = pool;
/* 120 */     this._pool.setFactory(this);
/* 121 */     this._stmtPoolFactory = stmtPoolFactory;
/* 122 */     this._validationQuery = validationQuery;
/* 123 */     this._validationQueryTimeout = validationQueryTimeout;
/* 124 */     this._connectionInitSqls = connectionInitSqls;
/* 125 */     this._defaultReadOnly = ((defaultReadOnly) ? Boolean.TRUE : Boolean.FALSE);
/* 126 */     this._defaultAutoCommit = defaultAutoCommit;
/*     */   }
/*     */ 
/*     */   public PoolableConnectionFactory(ConnectionFactory connFactory, ObjectPool pool, KeyedObjectPoolFactory stmtPoolFactory, String validationQuery, boolean defaultReadOnly, boolean defaultAutoCommit, int defaultTransactionIsolation)
/*     */   {
/* 140 */     this._connFactory = connFactory;
/* 141 */     this._pool = pool;
/* 142 */     this._pool.setFactory(this);
/* 143 */     this._stmtPoolFactory = stmtPoolFactory;
/* 144 */     this._validationQuery = validationQuery;
/* 145 */     this._defaultReadOnly = ((defaultReadOnly) ? Boolean.TRUE : Boolean.FALSE);
/* 146 */     this._defaultAutoCommit = defaultAutoCommit;
/* 147 */     this._defaultTransactionIsolation = defaultTransactionIsolation;
/*     */   }
/*     */ 
/*     */   public PoolableConnectionFactory(ConnectionFactory connFactory, ObjectPool pool, KeyedObjectPoolFactory stmtPoolFactory, String validationQuery, Collection connectionInitSqls, boolean defaultReadOnly, boolean defaultAutoCommit, int defaultTransactionIsolation)
/*     */   {
/* 163 */     this._connFactory = connFactory;
/* 164 */     this._pool = pool;
/* 165 */     this._pool.setFactory(this);
/* 166 */     this._stmtPoolFactory = stmtPoolFactory;
/* 167 */     this._validationQuery = validationQuery;
/* 168 */     this._connectionInitSqls = connectionInitSqls;
/* 169 */     this._defaultReadOnly = ((defaultReadOnly) ? Boolean.TRUE : Boolean.FALSE);
/* 170 */     this._defaultAutoCommit = defaultAutoCommit;
/* 171 */     this._defaultTransactionIsolation = defaultTransactionIsolation;
/*     */   }
/*     */ 
/*     */   public PoolableConnectionFactory(ConnectionFactory connFactory, ObjectPool pool, KeyedObjectPoolFactory stmtPoolFactory, String validationQuery, int validationQueryTimeout, boolean defaultReadOnly, boolean defaultAutoCommit, int defaultTransactionIsolation)
/*     */   {
/* 187 */     this._connFactory = connFactory;
/* 188 */     this._pool = pool;
/* 189 */     this._pool.setFactory(this);
/* 190 */     this._stmtPoolFactory = stmtPoolFactory;
/* 191 */     this._validationQuery = validationQuery;
/* 192 */     this._validationQueryTimeout = validationQueryTimeout;
/* 193 */     this._defaultReadOnly = ((defaultReadOnly) ? Boolean.TRUE : Boolean.FALSE);
/* 194 */     this._defaultAutoCommit = defaultAutoCommit;
/* 195 */     this._defaultTransactionIsolation = defaultTransactionIsolation;
/*     */   }
/*     */ 
/*     */   public PoolableConnectionFactory(ConnectionFactory connFactory, ObjectPool pool, KeyedObjectPoolFactory stmtPoolFactory, String validationQuery, int validationQueryTimeout, Collection connectionInitSqls, boolean defaultReadOnly, boolean defaultAutoCommit, int defaultTransactionIsolation)
/*     */   {
/* 212 */     this._connFactory = connFactory;
/* 213 */     this._pool = pool;
/* 214 */     this._pool.setFactory(this);
/* 215 */     this._stmtPoolFactory = stmtPoolFactory;
/* 216 */     this._validationQuery = validationQuery;
/* 217 */     this._validationQueryTimeout = validationQueryTimeout;
/* 218 */     this._connectionInitSqls = connectionInitSqls;
/* 219 */     this._defaultReadOnly = ((defaultReadOnly) ? Boolean.TRUE : Boolean.FALSE);
/* 220 */     this._defaultAutoCommit = defaultAutoCommit;
/* 221 */     this._defaultTransactionIsolation = defaultTransactionIsolation;
/*     */   }
/*     */ 
/*     */   public PoolableConnectionFactory(ConnectionFactory connFactory, ObjectPool pool, KeyedObjectPoolFactory stmtPoolFactory, String validationQuery, boolean defaultReadOnly, boolean defaultAutoCommit, AbandonedConfig config)
/*     */   {
/* 243 */     this._connFactory = connFactory;
/* 244 */     this._pool = pool;
/* 245 */     this._config = config;
/* 246 */     this._pool.setFactory(this);
/* 247 */     this._stmtPoolFactory = stmtPoolFactory;
/* 248 */     this._validationQuery = validationQuery;
/* 249 */     this._defaultReadOnly = ((defaultReadOnly) ? Boolean.TRUE : Boolean.FALSE);
/* 250 */     this._defaultAutoCommit = defaultAutoCommit;
/*     */   }
/*     */ 
/*     */   public PoolableConnectionFactory(ConnectionFactory connFactory, ObjectPool pool, KeyedObjectPoolFactory stmtPoolFactory, String validationQuery, boolean defaultReadOnly, boolean defaultAutoCommit, int defaultTransactionIsolation, AbandonedConfig config)
/*     */   {
/* 274 */     this._connFactory = connFactory;
/* 275 */     this._pool = pool;
/* 276 */     this._config = config;
/* 277 */     this._pool.setFactory(this);
/* 278 */     this._stmtPoolFactory = stmtPoolFactory;
/* 279 */     this._validationQuery = validationQuery;
/* 280 */     this._defaultReadOnly = ((defaultReadOnly) ? Boolean.TRUE : Boolean.FALSE);
/* 281 */     this._defaultAutoCommit = defaultAutoCommit;
/* 282 */     this._defaultTransactionIsolation = defaultTransactionIsolation;
/*     */   }
/*     */ 
/*     */   public PoolableConnectionFactory(ConnectionFactory connFactory, ObjectPool pool, KeyedObjectPoolFactory stmtPoolFactory, String validationQuery, boolean defaultReadOnly, boolean defaultAutoCommit, int defaultTransactionIsolation, String defaultCatalog, AbandonedConfig config)
/*     */   {
/* 308 */     this._connFactory = connFactory;
/* 309 */     this._pool = pool;
/* 310 */     this._config = config;
/* 311 */     this._pool.setFactory(this);
/* 312 */     this._stmtPoolFactory = stmtPoolFactory;
/* 313 */     this._validationQuery = validationQuery;
/* 314 */     this._defaultReadOnly = ((defaultReadOnly) ? Boolean.TRUE : Boolean.FALSE);
/* 315 */     this._defaultAutoCommit = defaultAutoCommit;
/* 316 */     this._defaultTransactionIsolation = defaultTransactionIsolation;
/* 317 */     this._defaultCatalog = defaultCatalog;
/*     */   }
/*     */ 
/*     */   public PoolableConnectionFactory(ConnectionFactory connFactory, ObjectPool pool, KeyedObjectPoolFactory stmtPoolFactory, String validationQuery, Boolean defaultReadOnly, boolean defaultAutoCommit, int defaultTransactionIsolation, String defaultCatalog, AbandonedConfig config)
/*     */   {
/* 343 */     this._connFactory = connFactory;
/* 344 */     this._pool = pool;
/* 345 */     this._config = config;
/* 346 */     this._pool.setFactory(this);
/* 347 */     this._stmtPoolFactory = stmtPoolFactory;
/* 348 */     this._validationQuery = validationQuery;
/* 349 */     this._defaultReadOnly = defaultReadOnly;
/* 350 */     this._defaultAutoCommit = defaultAutoCommit;
/* 351 */     this._defaultTransactionIsolation = defaultTransactionIsolation;
/* 352 */     this._defaultCatalog = defaultCatalog;
/*     */   }
/*     */ 
/*     */   public PoolableConnectionFactory(ConnectionFactory connFactory, ObjectPool pool, KeyedObjectPoolFactory stmtPoolFactory, String validationQuery, Collection connectionInitSqls, Boolean defaultReadOnly, boolean defaultAutoCommit, int defaultTransactionIsolation, String defaultCatalog, AbandonedConfig config)
/*     */   {
/* 381 */     this._connFactory = connFactory;
/* 382 */     this._pool = pool;
/* 383 */     this._config = config;
/* 384 */     this._pool.setFactory(this);
/* 385 */     this._stmtPoolFactory = stmtPoolFactory;
/* 386 */     this._validationQuery = validationQuery;
/* 387 */     this._connectionInitSqls = connectionInitSqls;
/* 388 */     this._defaultReadOnly = defaultReadOnly;
/* 389 */     this._defaultAutoCommit = defaultAutoCommit;
/* 390 */     this._defaultTransactionIsolation = defaultTransactionIsolation;
/* 391 */     this._defaultCatalog = defaultCatalog;
/*     */   }
/*     */ 
/*     */   public PoolableConnectionFactory(ConnectionFactory connFactory, ObjectPool pool, KeyedObjectPoolFactory stmtPoolFactory, String validationQuery, int validationQueryTimeout, Boolean defaultReadOnly, boolean defaultAutoCommit, int defaultTransactionIsolation, String defaultCatalog, AbandonedConfig config)
/*     */   {
/* 420 */     this._connFactory = connFactory;
/* 421 */     this._pool = pool;
/* 422 */     this._config = config;
/* 423 */     this._pool.setFactory(this);
/* 424 */     this._stmtPoolFactory = stmtPoolFactory;
/* 425 */     this._validationQuery = validationQuery;
/* 426 */     this._validationQueryTimeout = validationQueryTimeout;
/* 427 */     this._defaultReadOnly = defaultReadOnly;
/* 428 */     this._defaultAutoCommit = defaultAutoCommit;
/* 429 */     this._defaultTransactionIsolation = defaultTransactionIsolation;
/* 430 */     this._defaultCatalog = defaultCatalog;
/*     */   }
/*     */ 
/*     */   public PoolableConnectionFactory(ConnectionFactory connFactory, ObjectPool pool, KeyedObjectPoolFactory stmtPoolFactory, String validationQuery, int validationQueryTimeout, Collection connectionInitSqls, Boolean defaultReadOnly, boolean defaultAutoCommit, int defaultTransactionIsolation, String defaultCatalog, AbandonedConfig config)
/*     */   {
/* 461 */     this._connFactory = connFactory;
/* 462 */     this._pool = pool;
/* 463 */     this._config = config;
/* 464 */     this._pool.setFactory(this);
/* 465 */     this._stmtPoolFactory = stmtPoolFactory;
/* 466 */     this._validationQuery = validationQuery;
/* 467 */     this._validationQueryTimeout = validationQueryTimeout;
/* 468 */     this._connectionInitSqls = connectionInitSqls;
/* 469 */     this._defaultReadOnly = defaultReadOnly;
/* 470 */     this._defaultAutoCommit = defaultAutoCommit;
/* 471 */     this._defaultTransactionIsolation = defaultTransactionIsolation;
/* 472 */     this._defaultCatalog = defaultCatalog;
/*     */   }
/*     */ 
/*     */   public void setConnectionFactory(ConnectionFactory connFactory)
/*     */   {
/* 480 */     this._connFactory = connFactory;
/*     */   }
/*     */ 
/*     */   public void setValidationQuery(String validationQuery)
/*     */   {
/* 490 */     this._validationQuery = validationQuery;
/*     */   }
/*     */ 
/*     */   public void setValidationQueryTimeout(int timeout)
/*     */   {
/* 503 */     this._validationQueryTimeout = timeout;
/*     */   }
/*     */ 
/*     */   public synchronized void setConnectionInitSql(Collection connectionInitSqls)
/*     */   {
/* 513 */     this._connectionInitSqls = connectionInitSqls;
/*     */   }
/*     */ 
/*     */   public synchronized void setPool(ObjectPool pool)
/*     */   {
/* 521 */     if ((null != this._pool) && (pool != this._pool))
/*     */       try {
/* 523 */         this._pool.close();
/*     */       }
/*     */       catch (Exception e)
/*     */       {
/*     */       }
/* 528 */     this._pool = pool;
/*     */   }
/*     */ 
/*     */   public synchronized ObjectPool getPool()
/*     */   {
/* 536 */     return this._pool;
/*     */   }
/*     */ 
/*     */   public void setStatementPoolFactory(KeyedObjectPoolFactory stmtPoolFactory)
/*     */   {
/* 546 */     this._stmtPoolFactory = stmtPoolFactory;
/*     */   }
/*     */ 
/*     */   public void setDefaultReadOnly(boolean defaultReadOnly)
/*     */   {
/* 554 */     this._defaultReadOnly = ((defaultReadOnly) ? Boolean.TRUE : Boolean.FALSE);
/*     */   }
/*     */ 
/*     */   public void setDefaultAutoCommit(boolean defaultAutoCommit)
/*     */   {
/* 562 */     this._defaultAutoCommit = defaultAutoCommit;
/*     */   }
/*     */ 
/*     */   public void setDefaultTransactionIsolation(int defaultTransactionIsolation)
/*     */   {
/* 570 */     this._defaultTransactionIsolation = defaultTransactionIsolation;
/*     */   }
/*     */ 
/*     */   public void setDefaultCatalog(String defaultCatalog)
/*     */   {
/* 578 */     this._defaultCatalog = defaultCatalog;
/*     */   }
/*     */ 
/*     */   public Object makeObject() throws Exception {
/* 582 */     Connection conn = this._connFactory.createConnection();
/* 583 */     if (conn == null) {
/* 584 */       throw new IllegalStateException("Connection factory returned null from createConnection");
/*     */     }
/* 586 */     initializeConnection(conn);
/* 587 */     if (null != this._stmtPoolFactory) {
/* 588 */       KeyedObjectPool stmtpool = this._stmtPoolFactory.createPool();
/* 589 */       conn = new PoolingConnection(conn, stmtpool);
/* 590 */       stmtpool.setFactory((PoolingConnection)conn);
/*     */     }
/* 592 */     return new PoolableConnection(conn, this._pool, this._config);
/*     */   }
/*     */ 
/*     */   protected void initializeConnection(Connection conn) throws SQLException {
/* 596 */     Collection sqls = this._connectionInitSqls;
/* 597 */     if (conn.isClosed()) {
/* 598 */       throw new SQLException("initializeConnection: connection closed");
/*     */     }
/* 600 */     if (null != sqls) { Statement stmt = null;
/*     */       Iterator iterator;
/*     */       try {
/* 603 */         stmt = conn.createStatement();
/* 604 */         for (iterator = sqls.iterator(); iterator.hasNext(); )
/*     */         {
/* 606 */           Object o = iterator.next();
/* 607 */           if (o == null) {
/* 608 */             throw new NullPointerException("null connectionInitSqls element");
/*     */           }
/*     */ 
/* 611 */           String sql = o.toString();
/* 612 */           stmt.execute(sql);
/*     */         }
/*     */       } finally {
/* 615 */         if (stmt != null)
/*     */           try {
/* 617 */             stmt.close();
/*     */           }
/*     */           catch (Exception t)
/*     */           {
/*     */           }
/*     */       }
/*     */     }
/*     */   }
/*     */ 
/*     */   public void destroyObject(Object obj) throws Exception {
/* 627 */     if (obj instanceof PoolableConnection)
/* 628 */       ((PoolableConnection)obj).reallyClose();
/*     */   }
/*     */ 
/*     */   public boolean validateObject(Object obj)
/*     */   {
/* 633 */     if (obj instanceof Connection) {
/*     */       try {
/* 635 */         validateConnection((Connection)obj);
/* 636 */         return true;
/*     */       } catch (Exception e) {
/* 638 */         return false;
/*     */       }
/*     */     }
/* 641 */     return false;
/*     */   }
/*     */ 
/*     */   public void validateConnection(Connection conn) throws SQLException
/*     */   {
/* 646 */     String query = this._validationQuery;
/* 647 */     if (conn.isClosed()) {
/* 648 */       throw new SQLException("validateConnection: connection closed");
/*     */     }
/* 650 */     if (null != query) {
/* 651 */       Statement stmt = null;
/* 652 */       ResultSet rset = null;
/*     */       try {
/* 654 */         stmt = conn.createStatement();
/* 655 */         if (this._validationQueryTimeout > 0) {
/* 656 */           stmt.setQueryTimeout(this._validationQueryTimeout);
/*     */         }
/* 658 */         rset = stmt.executeQuery(query);
/* 659 */         if (!(rset.next()))
/* 660 */           throw new SQLException("validationQuery didn't return a row");
/*     */       }
/*     */       finally {
/* 663 */         if (rset != null)
/*     */           try {
/* 665 */             rset.close();
/*     */           }
/*     */           catch (Exception t)
/*     */           {
/*     */           }
/* 670 */         if (stmt != null)
/*     */           try {
/* 672 */             stmt.close();
/*     */           }
/*     */           catch (Exception t)
/*     */           {
/*     */           }
/*     */       }
/*     */     }
/*     */   }
/*     */ 
/*     */   public void passivateObject(Object obj) throws Exception {
/* 682 */     if (obj instanceof Connection) {
/* 683 */       Connection conn = (Connection)obj;
/* 684 */       if ((!(conn.getAutoCommit())) && (!(conn.isReadOnly()))) {
/* 685 */         conn.rollback();
/*     */       }
/* 687 */       conn.clearWarnings();
/* 688 */       if (!(conn.getAutoCommit())) {
/* 689 */         conn.setAutoCommit(true);
/*     */       }
/*     */     }
/* 692 */     if (obj instanceof DelegatingConnection)
/* 693 */       ((DelegatingConnection)obj).passivate();
/*     */   }
/*     */ 
/*     */   public void activateObject(Object obj) throws Exception
/*     */   {
/* 698 */     if (obj instanceof DelegatingConnection) {
/* 699 */       ((DelegatingConnection)obj).activate();
/*     */     }
/* 701 */     if (obj instanceof Connection) {
/* 702 */       Connection conn = (Connection)obj;
/* 703 */       if (conn.getAutoCommit() != this._defaultAutoCommit) {
/* 704 */         conn.setAutoCommit(this._defaultAutoCommit);
/*     */       }
/* 706 */       if ((this._defaultTransactionIsolation != -1) && (conn.getTransactionIsolation() != this._defaultTransactionIsolation))
/*     */       {
/* 709 */         conn.setTransactionIsolation(this._defaultTransactionIsolation);
/*     */       }
/* 711 */       if ((this._defaultReadOnly != null) && (conn.isReadOnly() != this._defaultReadOnly.booleanValue()))
/*     */       {
/* 713 */         conn.setReadOnly(this._defaultReadOnly.booleanValue());
/*     */       }
/* 715 */       if ((this._defaultCatalog == null) || (this._defaultCatalog.equals(conn.getCatalog())))
/*     */         return;
/* 717 */       conn.setCatalog(this._defaultCatalog);
/*     */     }
/*     */   }
/*     */ }
 
/* Location:           C:\Users\PEO\workspace\commons-dbcp-1.4.jar
 * Qualified Name:     org.apache.commons.dbcp.PoolableConnectionFactory
 * Java Class Version: 6 (50.0)
 * JD-Core Version:    0.5.3
 */

**peofofo** · 20/01/2012, 10h25

Bonjour, je pense avoir trouvé la solution:

Voici mon code qui fonctionne:

Code :

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public class JdbcConnector {
	static Logger logger = Logger.getLogger("JdbcConnector.class");
	private static Connection connect;
	private static GenericObjectPool _pool = null;
	private static DataSource ds;
 
	/**
         * Méthode qui va retourner notre instance
         * et la créer si elle n'existe pas...
         * @return
         */
	public static Connection getInstance(){
		try {
			if(connect == null || connect.isClosed()){
					//On regarde les préférences:
					Serializer<Preferences> preferences = new Serializer<Preferences>(new File("file/Pito.lic"));
					preferences.lectureserialize();
					Serializer<Licence> licence = new Serializer<Licence>(new File("file/sack.lic"));
					licence.lectureserialize();
					String serveur=(licence.getObject()!=null && licence.getObject().getType_licence().equals("normal"))?"localhost":preferences.getObject().getServeur();
					if(preferences.getFile().length() > 0 && preferences.getObject().isConnection_bdd()){
						/*logger.info("Lecture Préférence: "+preferences.getObject().toString());
						Properties props = new Properties();
						props.setProperty("user",preferences.getObject().getUtilisateur());
						props.setProperty("password",preferences.getObject().getPassword());
						props.setProperty("autoReconnect", "true");
						connect = DriverManager.getConnection("jdbc:mysql://"+serveur+"/"+preferences.getObject().getBase(),props);
						logger.info("Connection a la base de donnée: "+connect);*/
						String base = preferences.getObject().getBase();
						String utilisteur=preferences.getObject().getUtilisateur();
						String passe=preferences.getObject().getPassword();
						System.out.println("Setting up data source.");
						try {
							ds = setupDataSource("jdbc:mysql://"+serveur+"/"+base, utilisteur, passe, 30, 70);
							connect = ds.getConnection();
						} catch (Exception e) {
							e.printStackTrace();
							JOptionPane.showMessageDialog(null, e.getMessage(), "ERREUR DE CONNEXION ! ", JOptionPane.ERROR_MESSAGE);
						}
				        System.out.println("Done.");
					}
					else{
						connect=null;
						JOptionPane.showMessageDialog(null, "Impossible de se connecter!", "ERREUR DE CONNEXION ! ", JOptionPane.ERROR_MESSAGE);
					}
			}
		} catch (HeadlessException e) {
			e.printStackTrace();
			JOptionPane.showMessageDialog(null, e.getMessage(), "ERREUR DE CONNEXION ! ", JOptionPane.ERROR_MESSAGE);
		} catch (SQLException e) {
			e.printStackTrace();
			JOptionPane.showMessageDialog(null, e.getMessage(), "ERREUR DE CONNEXION ! ", JOptionPane.ERROR_MESSAGE);
		}
		return connect;	
	}
 
	public static void test_connection(String serveur, String base, String utilisteur, String passe) {
		// TODO Auto-generated method stub
		try {
			connect = DriverManager.getConnection("jdbc:mysql://"+serveur+"/"+base, utilisteur, passe);
			JOptionPane.showMessageDialog(null, "La connection avec la base de donnée est réussi!", "CONNECTION A LA BASE MYSL AVEC SUCCES! ", JOptionPane.INFORMATION_MESSAGE);
		} catch (HeadlessException e) {
			e.printStackTrace();
			JOptionPane.showMessageDialog(null, e.getMessage(), "ERREUR DE CONNEXION ! ", JOptionPane.ERROR_MESSAGE);
		} catch (SQLException e) {
			e.printStackTrace();
			JOptionPane.showMessageDialog(null, e.getMessage(), "ERREUR DE CONNEXION ! ", JOptionPane.ERROR_MESSAGE);
		}
 
	}
 
	/**
    *
    * @param connectURI - JDBC Connection URI
    * @param username - JDBC Connection username
    * @param password - JDBC Connection password
    * @param minIdle - Minimum number of idel connection in the connection pool
    * @param maxActive - Connection Pool Maximum Capacity (Size)
    * @throws Exception
    */
   public static DataSource setupDataSource(String connectURI, 
	String username, 
	String password,
	int minIdle, int maxActive
	) throws Exception {
       //
       // First, we'll need a ObjectPool that serves as the
       // actual pool of connections.
       //
       // We'll use a GenericObjectPool instance, although
       // any ObjectPool implementation will suffice.
       //
       GenericObjectPool connectionPool = new GenericObjectPool(null);
 
       connectionPool.setMinIdle( minIdle );
       connectionPool.setMaxActive( maxActive );
 
       JdbcConnector._pool = connectionPool; 
       // we keep it for two reasons
     // #1 We need it for statistics/debugging
     // #2 PoolingDataSource does not have getPool()
     // method, for some obscure, weird reason.
 
       //
       // Next, we'll create a ConnectionFactory that the
       // pool will use to create Connections.
       // We'll use the DriverManagerConnectionFactory,
       // using the connect string from configuration
       //
       ConnectionFactory connectionFactory = 
       	new DriverManagerConnectionFactory(connectURI,username, password);
 
       //
       // Now we'll create the PoolableConnectionFactory, which wraps
       // the "real" Connections created by the ConnectionFactory with
       // the classes that implement the pooling functionality.
       //
       PoolableConnectionFactory poolableConnectionFactory =
               new PoolableConnectionFactory(
       	connectionFactory,connectionPool,null,null,false,true);
 
       PoolingDataSource dataSource = 
       	new PoolingDataSource(connectionPool);
 
       return dataSource;
   }
 
   public static void printDriverStats() throws Exception {
       ObjectPool connectionPool = JdbcConnector._pool;
       logger.info("NumActive: " + connectionPool.getNumActive());
       logger.info("NumIdle: " + connectionPool.getNumIdle());
   }
 
   /**
   *  getNumLockedProcesses - gets the 
   *  number of currently locked processes on the MySQL db
   *
   *  @return Number of locked processes
   */
   public int getNumLockedProcesses()
   {
       int num_locked_connections = 0;
       Connection con = null; 
       PreparedStatement p_stmt = null;  ResultSet rs = null;
       try
       {
           con = JdbcConnector.ds.getConnection();
           p_stmt = con.prepareStatement("SHOW PROCESSLIST");
           rs = p_stmt.executeQuery();
           while(rs.next())
           {
               if(rs.getString("State") != 
               		null && rs.getString("State").equals("Locked"))
               {
                   num_locked_connections++;
               }
           }
       }
       catch(Exception e)
       {
    	   logger.debug("Failed to get get Locked Connections - Exception: " + e.toString());
       } finally {
           try {
               rs.close();
               p_stmt.close();
               con.close();
           }  catch ( java.sql.SQLException ex) {
        	   logger.error ( ex.toString() );
           }
       }
       return num_locked_connections;
   }
 
}

Ce code vient du tutoriel: http://www.freshblurbs.com/jakarta-c...-dbcp-tutorial

J'ai cependant quelques questions:
1- A quoi correspond le min pool size et le max pool size? Valeur par défaut 30 et 70.
2- Le destructeur protected void finalize(), n'ai jamais appelé est il utile?
3- La méthode printDriverStats() donne le nombre de connexions?
4- La méthode getNumLockedProcesses(), je ne vois pas a quoi elle sert?

Merci

EDIT> Je viens de remarquer que le fait d'avoir fermé les requêtes, le temps moyen d'affichage d'une page est multiplié par 2 (surtout lorsque la base est distante).

**sinok** · 20/01/2012, 12h02

1 - Le min pool size est le nombre de connexions instanciées par défaut, le max étant le nombre maximal de connexions instanciées en parallèle dans le pool, au delà du max, le getConnection ne fournira la connexion qu'une fois qu'un des objets Connection sera à nouveau disponible (le but est d'éviter qu'il y ait trop de connexions simultanées au niveau du SGBD).

2 - Je ne vois pas de finalize dans ton code, de quel finalize parles tu?... De plus ce n'est pas un destructeur au sens propre du terme, et quoi qu'il en soit tu n'as en java aucune assurance quant au moment de son exécution, vu que c'est le GC qui gère ça.

3- bah suffit de lire le code de la méthode...

Code :

Sélectionner tout - Visualiser dans une fenêtre à part

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 public static void printDriverStats() throws Exception {
        ObjectPool connectionPool = ConnectionManager._pool;
        LOG.info("NumActive: " + connectionPool.getNumActive());
        LOG.info("NumIdle: " + connectionPool.getNumIdle());
    }

C'est suffisamment explicite...

4 - Récupère le nombre de processes au statut locked dans ta base mysql.

**tchize_** · 20/01/2012, 13h28

EDIT> Je viens de remarquer que le fait d'avoir fermé les requêtes, le temps moyen d'affichage d'une page est multiplié par 2 (surtout lorsque la base est distante).

Crée un transaction explicite dans ta connexion et fait explicitement le commit. Sinon t'es au bon vouloir du driver qui pourrait faire un commit ou un rollback lors du close.

**peofofo** · 24/01/2012, 06h10

Merci a tous les deux

Voici mes tests:
Temps de chargement des pages (changement de vue)
- la bdd en local: moins d'une seconde
- a distance sur un serveur (PC- Windows 7) wamp avec fermeture systématique des connections 4 secondes
- a distance sur un serveur (PC- Windows 7) wamp sans fermeture systématique des connections 2 secondes
-Test bdd distant sur serveur linux chez OVH: (en cours)

Test temps de connection supérieur à 8 heures:
-sans fermeture connections : timeout au bout de 8 heures
-avec fermeture connections : test en cours

Je vous tiens informé dès que j'aurais fini tous les tests.

Timeout MySQL au bout de 8 heures

JDBC Java

Vue hybride

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