cityaction.java

客户资料管理系统——来自人民邮电出版社《Java信息管理系统开发实例导航》的第六章

//---------------------------------------------------------
// Application: Crm of Enterprice
// Author     : eSingle
// File       : CityAction.java
//
// Copyright 2004 LandSoft Corp.
// Writed at Thu Jun 24 15:45:10 CST 2004
// 作者：曹广鑫
// mailto:[e-mail]
//---------------------------------------------------------


package com.landsoft.crm.controller;

import javax.sql.*;
import java.util.*;

import org.apache.commons.logging.LogFactory;


import javax.servlet.http.*;
import javax.servlet.*;

import org.apache.struts.action.*;
import org.apache.struts.util.*;

import com.landsoft.crm.model.*;
import com.landsoft.crm.dao.*;
import com.landsoft.crm.util.*;

public class CityAction extends Action {
  private org.apache.commons.logging.Log __log = LogFactory.getFactory().getInstance(this.getClass());
  private static final int PAGE_LENGTH = 20;

  public ActionForward execute(ActionMapping mapping, ActionForm form,
      HttpServletRequest request, HttpServletResponse response) {
    ActionForward myforward = null;
    String myaction = mapping.getParameter();

    if (isCancelled(request)) {
      if (__log.isInfoEnabled()) {
        __log.info(" [City] " + mapping.getAttribute() + " - action was cancelled");
      }
      return mapping.findForward("cancel");
    }
    if (__log.isInfoEnabled()) {
      __log.info(" [City] action: "+myaction);
    }
    if ("".equalsIgnoreCase(myaction)) {
      myforward = mapping.findForward("failure");
    } else if ("VIEW".equalsIgnoreCase(myaction)) {
      myforward = performView(mapping, form, request, response);
    } else if ("EDIT".equalsIgnoreCase(myaction)) {
      myforward = performEdit(mapping, form, request, response);
    } else if ("ADD".equalsIgnoreCase(myaction)) {
      myforward = performAdd(mapping, form, request, response);
    } else if ("SAVE".equalsIgnoreCase(myaction)) {
      myforward = performSave(mapping, form, request, response);
    } else if ("REMOVE".equalsIgnoreCase(myaction)) {
      myforward = performRemove(mapping, form, request, response);
    } else if ("TRASH".equalsIgnoreCase(myaction)) {
      myforward = performTrash(mapping, form, request, response);
    } else if ("LIST".equalsIgnoreCase(myaction)) {
      myforward = performList(mapping, form, request, response);
    } else {
      myforward = mapping.findForward("failure");
    }
    return myforward;
  }


  private ActionForward performList(ActionMapping mapping, ActionForm actionForm, HttpServletRequest request, HttpServletResponse response) {
    try {
      DataSource ds = (DataSource) servlet.getServletContext().getAttribute(Action.DATA_SOURCE_KEY);

      CityDAO cityDAO = new CityDAO(ds);

      int offset;
      int length = PAGE_LENGTH;
      String pageOffset = request.getParameter("pager.offset");
      if (pageOffset == null || pageOffset.equals("")) {
        offset = 0;
      } else {
        offset = Integer.parseInt(pageOffset);
      }

      List citys = cityDAO.list(offset, length);

      String[] objKeys = {"City", "list"};
      String objKey = CacheManager.createKey(objKeys);
      Integer size = (Integer)SizeCacheManager.getCache(objKey);
      if(size == null) {
        size = new Integer(cityDAO.getSize("city", ""));
        SizeCacheManager.putCache(size, objKey, 1);
      }

      String url = request.getContextPath()+"/"+mapping.getPath()+".do";
      String pagerHeader = Pager.generate(offset, size.intValue(), length, url);
      request.setAttribute("pagerHeader", pagerHeader);

      request.setAttribute("CITYS", citys);
    } catch (Exception e) {
      generalError(request, e);
      return mapping.findForward("failure");
    }

    return mapping.findForward("success");
  }

  private ActionForward performView(ActionMapping mapping, ActionForm actionForm, HttpServletRequest request, HttpServletResponse response) {
    CityForm form = (CityForm) actionForm;
    try {
      DataSource ds = (DataSource) servlet.getServletContext().getAttribute(Action.DATA_SOURCE_KEY);

      CityDAO cityDAO = new CityDAO(ds);

      String citycode = request.getParameter("citycode");
      String nationcode = request.getParameter("nationcode");
      String provincecode = request.getParameter("provincecode");
      City city = cityDAO.retrieve(citycode, nationcode, provincecode);
      if (city == null) {
        ActionErrors aes = new ActionErrors();
        aes.add(aes.GLOBAL_ERROR, new ActionError("error.object.notfound", "City"));
        saveErrors(request, aes);
        if (__log.isErrorEnabled()) {
          __log.error(" [City] Object not found");
        }
      } else {
        org.apache.commons.beanutils.BeanUtils.populate(form, org.apache.commons.beanutils.BeanUtils.describe(city));
      }
    } catch (Exception e) {
      generalError(request, e);
      return mapping.findForward("failure");
    }
    return mapping.findForward("success");
  }

  private ActionForward performSave(ActionMapping mapping, ActionForm actionForm, HttpServletRequest request, HttpServletResponse response) {
    CityForm form = (CityForm) actionForm;

    try {
      DataSource ds = (DataSource) servlet.getServletContext().getAttribute(Action.DATA_SOURCE_KEY);

      CityDAO cityDAO = new CityDAO(ds);

      City city = new City();
      org.apache.commons.beanutils.BeanUtils.populate(city, org.apache.commons.beanutils.BeanUtils.describe(form));
      int strutsAction = form.getStrutsAction();
      if (strutsAction == CityForm.ADD) {
        String citycode = city.getCitycode();
        String nationcode = city.getNationcode();
        String provincecode = city.getProvincecode();
        if (cityDAO.retrieve(citycode, nationcode, provincecode) == null) {
          cityDAO.insert(city);
        } else {
          sqlDuplicateError(request, "City");
          return mapping.findForward("failure");
        }
      } else if (strutsAction == CityForm.EDIT) {
        cityDAO.update(city);
      }
    } catch (Exception e) {
      generalError(request, e);
      return mapping.findForward("failure");
    }
    return mapping.findForward("success");
  }

  private ActionForward performEdit(ActionMapping mapping, ActionForm actionForm, HttpServletRequest request, HttpServletResponse response) {
    CityForm form = (CityForm) actionForm;
    form.setStrutsAction(CityForm.EDIT);
    try {
      DataSource ds = (DataSource) servlet.getServletContext().getAttribute(Action.DATA_SOURCE_KEY);

      CityDAO cityDAO = new CityDAO(ds);

      String citycode = request.getParameter("citycode");
      String nationcode = request.getParameter("nationcode");
      String provincecode = request.getParameter("provincecode");

      City city = cityDAO.retrieve(citycode, nationcode, provincecode);
      org.apache.commons.beanutils.BeanUtils.populate(form, org.apache.commons.beanutils.BeanUtils.describe(city));
    } catch (Exception e) {
      generalError(request, e);
      return mapping.findForward("failure");
    }
    return mapping.findForward("success");
  }

  private ActionForward performAdd(ActionMapping mapping, ActionForm actionForm, HttpServletRequest request, HttpServletResponse response) {
    CityForm form = (CityForm) actionForm;
    form.setStrutsAction(CityForm.ADD);
    return mapping.findForward("success");
  }
  private ActionForward performRemove(ActionMapping mapping, ActionForm actionForm, HttpServletRequest request, HttpServletResponse response) {
    return performView(mapping, actionForm, request, response);
  }

  private ActionForward performTrash(ActionMapping mapping, ActionForm actionForm, HttpServletRequest request, HttpServletResponse response) {
    CityForm form = (CityForm) actionForm;
    try {
      DataSource ds = (DataSource) servlet.getServletContext().getAttribute(Action.DATA_SOURCE_KEY);

      CityDAO cityDAO = new CityDAO(ds);

      String citycode = request.getParameter("citycode");
      String nationcode = request.getParameter("nationcode");
      String provincecode = request.getParameter("provincecode");
      cityDAO.delete(citycode, nationcode, provincecode);
    } catch (Exception e) {
      generalError(request, e);
      return mapping.findForward("failure");
    }
    return mapping.findForward("success");
  }


  private void sqlDuplicateError(HttpServletRequest request, String objName) {
    ActionErrors aes = new ActionErrors();
    aes.add(aes.GLOBAL_ERROR, new ActionError("errors.database.duplicate", objName));
    saveErrors(request, aes);
    if (__log.isErrorEnabled()) {
      __log.error(" [City] Duplicate key Error - " + objName);
    }
  }

  private void generalError(HttpServletRequest request, Exception e) {
    ActionErrors aes = new ActionErrors();
    aes.add(aes.GLOBAL_ERROR, new ActionError("error.general", e.getMessage()));
    saveErrors(request, aes);
    e.printStackTrace();
    if (__log.isErrorEnabled()) {
      __log.error(" [City] Error - " + e.getMessage());
    }
  }
}