protectedloglistener.java

pos机交易实现源代码 含金融卡交易8583协议实现 开发环境：linux 典型应用：嵌入系统开发 仅供参考

/*
 * Copyright (c) 2000 jPOS.org.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. The end-user documentation included with the redistribution,
 *    if any, must include the following acknowledgment:
 *    "This product includes software developed by the jPOS project 
 *    (http://www.jpos.org/)". Alternately, this acknowledgment may 
 *    appear in the software itself, if and wherever such third-party 
 *    acknowledgments normally appear.
 *
 * 4. The names "jPOS" and "jPOS.org" must not be used to endorse 
 *    or promote products derived from this software without prior 
 *    written permission. For written permission, please contact 
 *    [e-mail].
 *
 * 5. Products derived from this software may not be called "jPOS",
 *    nor may "jPOS" appear in their name, without prior written
 *    permission of the jPOS project.
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  
 * IN NO EVENT SHALL THE JPOS PROJECT OR ITS CONTRIBUTORS BE LIABLE FOR 
 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 
 * POSSIBILITY OF SUCH DAMAGE.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the jPOS Project.  For more
 * information please see <http://www.jpos.org/>.
 */

package org.jpos.util;

import java.io.*;
import java.util.*;
import org.jpos.iso.ISOMsg;
import org.jpos.iso.ISOUtil;
import org.jpos.iso.ISOField;
import org.jpos.iso.ISOException;
import org.jpos.core.Configurable;
import org.jpos.core.Configuration;
import org.jpos.core.ConfigurationException;

/**
 * Protects selected fields from Logs<br>
 * ProtectedLogListener acts like a filter for Event logs,
 * it should be defined _before_ other standard LogListeners
 * such as SimpleLogListener or RotateLogListeners.<br>
 * i.e.
 * <pre>
 * <logger name="qsp">
 *   <log-listener class="org.jpos.util.SimpleLogListener"/>
 *   <log-listener class="org.jpos.util.ProtectedLogListener">
 *     <property name="protect" value="2 35 45 55" />
 *     <property name="wipe"    value="48" />
 *   </log-listener>
 *   <log-listener class="org.jpos.util.RotateLogListener">
 *     <property name="file" value="/tmp/qsp.log" />
 *     <property name="window" value="86400" />
 *     <property name="copies" value="5" />
 *     <property name="maxsize" value="1000000" />
 *   </log-listener>
 * </logger>
 * </pre>
 * 
 * Order is important. In the previous example SimpleLogListener
 * will dump unprotected LogEvents while RotateLogListener will
 * dump protected ones (for selected fields)
 *
 * @author <a href="mailto:[e-mail]">Alejandro P. Revilla</a>
 * @version $Revision: 1.2 $ $Date: 2001/09/20 12:50:30 $
 * @see org.jpos.core.Configurable
 * @since jPOS 1.3.3
 */
public class ProtectedLogListener implements LogListener, Configurable
{
    int[] protectFields = null;
    int[] wipeFields    = null;
    Configuration cfg   = null;

    public ProtectedLogListener () {
	super();
    }

   /**
    * Configure this ProtectedLogListener<br>
    * Properties:<br>
    * <ul>
    *  <li>[protect]   blank separated list of fields to be protected
    *  <li>[wipe]      blank separated list of fields to be wiped
    * </ul>
    * @param cfg Configuration 
    * @throws ConfigurationException
    */
    public void setConfiguration (Configuration cfg)
	throws ConfigurationException
    {
        this.cfg = cfg;
        protectFields = ISOUtil.toIntArray (cfg.get ("protect", ""));
        wipeFields    = ISOUtil.toIntArray (cfg.get ("wipe", ""));
    }
    public synchronized void log (LogEvent ev) {
        Vector payLoad = ev.getPayLoad();
        int size = payLoad.size();
        for (int i=0; i<size; i++) {
            Object obj = payLoad.elementAt (i);
            if (obj instanceof ISOMsg) {
                ISOMsg m = (ISOMsg) ((ISOMsg) obj).clone();
                try {
                    checkProtected (m);
                    checkHidden (m);
                } catch (ISOException e) { 
                    ev.addMessage (e);
                }
                payLoad.setElementAt (m, i);
            }
        }
    }
    private void checkProtected (ISOMsg m) throws ISOException {
        for (int i=0; i<protectFields.length; i++) {
            int f = protectFields[i];
            if (m.hasField (f))
                m.set (new ISOField (f, ISOUtil.protect (m.getString(f))));
        }
    }
    private void checkHidden (ISOMsg m) throws ISOException {
        for (int i=0; i<wipeFields.length; i++) {
            int f = wipeFields[i];
            if (m.hasField (f))
                m.set (new ISOField (f, "[WIPED]"));
        }
    }
}