qfactory.java

POS is a Java&#174 platform-based, mission-critical, ISO-8583 based financial transaction library/fr

/*
 * jPOS Project [http://jpos.org]
 * Copyright (C) 2000-2008 Alejandro P. Revilla
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

package org.jpos.q2;


import java.io.File;
import java.io.FileInputStream;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.net.MalformedURLException;
import java.util.Collection;
import java.util.Iterator;
import java.util.List;
import java.util.MissingResourceException;
import java.util.Properties;
import java.util.ResourceBundle;

import javax.management.Attribute;
import javax.management.AttributeList;
import javax.management.AttributeNotFoundException;
import javax.management.InstanceAlreadyExistsException;
import javax.management.InstanceNotFoundException;
import javax.management.InvalidAttributeValueException;
import javax.management.MBeanException;
import javax.management.MBeanRegistrationException;
import javax.management.MBeanServer;
import javax.management.MalformedObjectNameException;
import javax.management.NotCompliantMBeanException;
import javax.management.ObjectInstance;
import javax.management.ObjectName;
import javax.management.ReflectionException;

import org.jdom.Element;
import org.jpos.core.Configurable;
import org.jpos.core.Configuration;
import org.jpos.core.ConfigurationException;
import org.jpos.core.SimpleConfiguration;
import org.jpos.core.XmlConfigurable;
import org.jpos.util.LogSource;
import org.jpos.util.Logger;

/**
 * @author <a href="mailto:[e-mail]">Alireza Taherkordi</a>
 * @author <a href="mailto:[e-mail]">Alejandro P. Revilla</a>
 * @version $Revision: 2594 $ $Date: 2008-01-22 14:41:31 -0200 (Tue, 22 Jan 2008) $
 */
public class QFactory {
    ObjectName loaderName;
    Q2 q2;
    ResourceBundle classMapping;

    public QFactory (ObjectName loaderName, Q2 q2) {
        super ();
        this.loaderName = loaderName;
        this.q2  = q2;
        classMapping = ResourceBundle.getBundle(this.getClass().getName());
    }

    public Object instantiate (Q2 server, Element e) 
        throws ReflectionException,
               MBeanException,
               InstanceNotFoundException
    {
        String clazz  = e.getAttributeValue ("class");
        if (clazz == null) {
            try {
                clazz = classMapping.getString (e.getName());
            } catch (MissingResourceException ex) {
                // no class attribute, no mapping
                // let MBeanServer do the yelling
            }
        }
        MBeanServer mserver = server.getMBeanServer();
        getExtraPath (server.getLoader (), e);
        return mserver.instantiate (clazz, loaderName);
    }

    public ObjectInstance createQBean (Q2 server, Element e, Object obj) 
        throws ClassNotFoundException, 
               InstantiationException,
               IllegalAccessException,
               MalformedObjectNameException,
               MalformedURLException,
               InstanceAlreadyExistsException,
               MBeanRegistrationException,
               InstanceNotFoundException,
               MBeanException,
               NotCompliantMBeanException,
               InvalidAttributeValueException,
               ReflectionException,
               ConfigurationException
    {
        String name   = e.getAttributeValue ("name");
        if (name == null)
            name = e.getName ();

        ObjectName objectName = new ObjectName (Q2.QBEAN_NAME + name);
        MBeanServer mserver = server.getMBeanServer();
        if(mserver.isRegistered(objectName)) {
            throw new InstanceAlreadyExistsException (name+" has already been deployed in another file.");
        }
        ObjectInstance instance = mserver.registerMBean (
            obj, objectName 
        );
        try {
            setAttribute (mserver, objectName, "Name", name);
            String logger = e.getAttributeValue ("logger");
            if (logger != null)
                setAttribute (mserver, objectName, "Logger", logger);
            setAttribute (mserver, objectName, "Server", server);
            setAttribute (mserver, objectName, "Persist", e);
            configureQBean(mserver,objectName,e);
            setConfiguration (obj, e);  // handle legacy (QSP v1) Configurables 

            if (obj instanceof QBean) 
                mserver.invoke (objectName, "init",  null, null);
        }
        catch (ConfigurationException ce) {
            mserver.unregisterMBean(objectName);
            throw ce;
        }

        return instance;
    }
    public Q2 getQ2() {
        return q2;
    }
    public void getExtraPath (QClassLoader loader, Element e) {
        Element classpathElement = e.getChild ("classpath");
        if (classpathElement != null) {
            try {
                loader = loader.scan (true);    // force a new classloader
            } catch (Throwable t) {
                getQ2().getLog().error(t);
            }
            Iterator iter = classpathElement.getChildren ("url").iterator();
            while (iter.hasNext ()) {
                Element u = (Element) iter.next ();
                try {
                    loader.addURL (u.getTextTrim ());
                } catch (MalformedURLException ex) {
                    q2.getLog().warn (u.getTextTrim(), ex);
                }
            }
        }
    }

    public void setAttribute 
        (MBeanServer server, ObjectName objectName, 
         String attribute, Object value)
        throws InstanceNotFoundException,
               MBeanException,
               InvalidAttributeValueException,
               ReflectionException
    {
        try {
            server.setAttribute (
                objectName, new Attribute (attribute, value)
            );
        } catch (AttributeNotFoundException ex) {
            // okay to fail
        }
    }

    public void startQBean (Q2 server, ObjectName objectName)
        throws ClassNotFoundException, 
               InstantiationException,
               IllegalAccessException,
               MalformedObjectNameException,
               MalformedURLException,
               InstanceAlreadyExistsException,
               MBeanRegistrationException,
               InstanceNotFoundException,
               MBeanException,
               NotCompliantMBeanException,
               InvalidAttributeValueException,
               ReflectionException
    {
        MBeanServer mserver = server.getMBeanServer();
        mserver.invoke (objectName, "start",  null, null);
    }

    public void destroyQBean (Q2 server, ObjectName objectName, Object obj)
        throws ClassNotFoundException, 
               InstantiationException,
               IllegalAccessException,
               MalformedObjectNameException,
               MalformedURLException,
               InstanceAlreadyExistsException,
               MBeanRegistrationException,
               InstanceNotFoundException,
               MBeanException,
               NotCompliantMBeanException,
               InvalidAttributeValueException,
               ReflectionException
    {
        MBeanServer mserver = server.getMBeanServer();
        if (obj instanceof QBean) {
            mserver.invoke (objectName, "stop",  null, null);
            mserver.invoke (objectName, "destroy",  null, null);
        }
        if (objectName != null)
            mserver.unregisterMBean (objectName);