auditlogger.java

我在加拿大学习的一个比较复杂的在线银行程序.

package com.ebusiness.ebank.log;

/**
 * <p>Title: </p>
 * <p>Description: </p>
 * <p>Copyright: Copyright (c) 2005</p>
 * <p>Company: eBusiness Inc., All right reserved</p>
 * @author not attributable
 * @version 1.0
 */
import java.util.Date;

import org.apache.log4j.Logger;
import org.apache.log4j.MDC;

import com.ebusiness.ebank.util.Constants;

public class AuditLogger {
  private Logger log;
  private Date startTime;
  private String failedReason;
  private String status;
  private String userID;
  private String action;
  private String entity;

  public AuditLogger(Logger log, String userID, String action, String entity)
  {
    startTime = new Date();
    this.log = log;
    this.userID = userID;
    this.action = action;
    this.entity = entity;
    failedReason = "";
    status = "Successful";
  }

  public void setFailedReason(String reason){
    this.failedReason = reason;
  }

  public void setStatus(String status){
   this.status = status;
 }

 public void log(String message){
    MDC.put(Constants.USER_ID, this.userID);
    MDC.put(Constants.ACTION, this.action);
    MDC.put(Constants.ENTITY, this.entity);
    MDC.put(Constants.STATUS, this.status);
    if (this.failedReason.length() > Constants.FAILED_REASON_MAX_LENGTH)
       this.failedReason = this.failedReason.substring(0,
                                             Constants.
                                             FAILED_REASON_MAX_LENGTH - 1);
    MDC.put(Constants.FAILED_REASON, this.failedReason);
    Date endTime = new Date();
    long duration = endTime.getTime() - startTime.getTime();
    MDC.put(Constants.DURATION, Long.toString(duration));
    log.audit(message);
 }
}