resultvohelper.java.svn-base

this is example use EJB with jboss.

/*
 * Copyright(C) 2008, NTT AT Co., Ltd.
 * Project: AWGStar
 *
 * Notes:
 *  N/A
 *
 * Record of change:
 * Date         Version      Name       Content
 * 2008/12/15   1.0          TriNT      First create       
 */
package jp.co.ntt.awgview.server.snmp;

import java.io.Serializable;
import java.util.Vector;

import jp.co.ntt.awgview.server.common.LogWriter;


/**
 * Class name : ResultVOHelper <BR>
 * 
 * Package : jp.co.ntt_at.awgview.server.common <BR>
 * 
 * Description : Store all SNMP response data from AWG-NE. <BR> 
 * Application use SnmpManager Object send SNMP commands to SNMP-Agents, and handle their response.  <BR> 
 * The response data will be store into ResultVO List. <BR>
 * 
 * @author : AI&T
 * @version : 1.0
 */
public class ResultVOHelper implements Serializable {
	private static final long serialVersionUID = -1694259899939266388L;
	/** List storage ResultVOs object */
	private Vector<ResultVO> lstResultVO = null;

	/**
	 * ResultVOHelper constructor
	 */
	public ResultVOHelper() {
		lstResultVO = new Vector<ResultVO>();
	}

	/**
	 * Returns the ResultVO list
	 * 
	 * @return Returns the lstResultVO.
	 */
	public Vector<ResultVO> getResultVOList() {
		return lstResultVO;
	}

	/**
	 * Sets the ResultVO list
	 * 
	 * @param ResultVOList
	 *            The ResultVOList to set
	 */
	public void setResultVOList(Vector<ResultVO> ResultVOList) {
		this.lstResultVO = ResultVOList;
	}

	/***
	 * Search a ResultVO object in lstResultVO
	 * 
	 * @param request
	 *            id: The ID of this ResultVO
	 * @return A ResultVO object that expected
	 */
	public synchronized ResultVO searchRequestID(int request) {
		ResultVO resultVO = null;
		
		try {
			synchronized (lstResultVO) {
				if ((lstResultVO == null)) {
					return null;
				} else if (lstResultVO.isEmpty()) {
					return null;
				}else{
					Vector<ResultVO> vectorTemp = new Vector<ResultVO>();					
					int len = lstResultVO.size();
					
					for (int i = 0; i < len; i++) {						
						ResultVO resultVOTemp = lstResultVO.get(i);
						if ((resultVOTemp != null)) {
							int responseID = resultVOTemp.getRequestID();
							if (responseID == request) {
								resultVO = resultVOTemp;
								vectorTemp.add(resultVOTemp);
							}
						}
					}
					// Remove Element in Vector					
					lstResultVO.removeAll(vectorTemp);
					
				}
			}
		} catch (Exception e) {
			LogWriter.getSNMPLogger().warn(e.toString());
		}
		return resultVO;
	}

	/**
	 * Add new a resultVO object in lstResultVO
	 * 
	 * @param resultVO
	 *            The resultVO that added
	 * @return Value that present whether this DataVO is added to lstResultVO or not
	 * 
	 */
	public synchronized boolean addDataVO(ResultVO resultVO) {
		boolean isAdded = false;

		if (resultVO != null) {
			try {
				lstResultVO.addElement(resultVO);
				isAdded = true;
			} catch (Exception e) {
				LogWriter.getSNMPLogger().warn("List store SNMP result out of memory. Refesh data");
				deleteAll();
				lstResultVO = new Vector<ResultVO>();
				lstResultVO.addElement(resultVO);
				isAdded = true;
			}
		}
		return isAdded;
	}

	/**
	 * Delete all ResultVO in lstResultVO
	 */
	public synchronized void deleteAll() {
		try {
			synchronized (lstResultVO) {
				if (lstResultVO != null){
					lstResultVO.removeAllElements();
				}
				lstResultVO = new Vector<ResultVO>();
			}
		} catch (Exception e) {
			LogWriter.getSNMPLogger().warn("Delete all ResultVO in lstResultVO: false");
			LogWriter.getSNMPLogger().warn("Refeshing lstResultVO");
			synchronized (lstResultVO) {
				lstResultVO = new Vector<ResultVO>();
			}
		}
	}
}