logaction.java

JSP+Struts+缓存的公司管理系统

//---------------------------------------------------------
// Application: Company Applcation
// Author     : Cao guangxin
// File       : LogAction.java
//
// Copyright 2006 RelationInfo Software
// Writed at Wed Apr 12 08:58:55 CST 2006
// writed by Eclipse SDK
// Visit http://www.37signals.cn
//---------------------------------------------------------


package net.cn37signals.company.controller;

import java.util.List;
import java.util.MissingResourceException;
import java.util.ResourceBundle;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.sql.DataSource;

import net.cn37signals.company.dao.LogDAO;
import net.cn37signals.company.model.Log;
import net.cn37signals.company.util.CacheManager;
import net.cn37signals.company.util.Pager;

import org.apache.commons.logging.LogFactory;
import org.apache.struts.action.Action;
import org.apache.struts.action.ActionError;
import org.apache.struts.action.ActionErrors;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;

public class LogAction extends Action {
  private org.apache.commons.logging.Log __log = LogFactory.getFactory().getInstance(this.getClass());
  private static int PAGE_LENGTH = 20;
  static {
    ResourceBundle prop = ResourceBundle.getBundle("resources.application");
    try {
      PAGE_LENGTH = Integer.parseInt(prop.getString("list.page.length"));
    } catch (Exception e) {
    }
  }

  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(" [Log] " + mapping.getAttribute() + " - action was cancelled");
      }
      return mapping.findForward("cancel");
    }
    if (__log.isInfoEnabled()) {
      __log.info(" [Log] 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 = getDataSource(request);

      LogDAO logDAO = new LogDAO(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 logs = logDAO.list(offset, length);

      String[] objKeys = {"Log", "list"};
      String objKey = CacheManager.createKey(objKeys);
      Integer size = (Integer)SizeCacheManager.getCache(objKey);
      if(size == null) {
        size = new Integer(logDAO.getSize("log", ""));
        SizeCacheManager.putCache(size, objKey, 10);
      }

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

      request.setAttribute("LOGS", logs);
    } 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) {
    LogForm form = (LogForm) actionForm;
    try {
      DataSource ds = getDataSource(request);

      LogDAO logDAO = new LogDAO(ds);

      int year = Integer.parseInt(request.getParameter("year"));
      int month = Integer.parseInt(request.getParameter("month"));
      Log log = logDAO.retrieve(year, month);
      if (log == null) {
        ActionErrors aes = new ActionErrors();
        aes.add(aes.GLOBAL_ERROR, new ActionError("error.object.notfound", "Log"));
        saveErrors(request, aes);
        if (__log.isErrorEnabled()) {
          __log.error(" [Log] Object not found");
        }
      } else {
        org.apache.commons.beanutils.BeanUtils.populate(form, org.apache.commons.beanutils.BeanUtils.describe(log));
        try {
          form.setYearDisplay("Log.year."+String.valueOf(log.getYear()));
        } catch (MissingResourceException mre) {
          form.setYearDisplay("not.available");
        }
        try {
          form.setMonthDisplay("Log.month."+String.valueOf(log.getMonth()));
        } catch (MissingResourceException mre) {
          form.setMonthDisplay("not.available");
        }
      }
    } 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) {
    LogForm form = (LogForm) actionForm;

    try {
      DataSource ds = getDataSource(request);

      LogDAO logDAO = new LogDAO(ds);

      Log log = new Log();
      org.apache.commons.beanutils.BeanUtils.populate(log, org.apache.commons.beanutils.BeanUtils.describe(form));
      int strutsAction = form.getStrutsAction();
      if (strutsAction == LogForm.ADD) {
        int year = log.getYear();
        int month = log.getMonth();
        if (logDAO.retrieve(year, month) == null) {
          logDAO.insert(log);
        } else {
          sqlDuplicateError(request, "Log");
          return mapping.findForward("failure");
        }
      } else if (strutsAction == LogForm.EDIT) {
        logDAO.update(log);
      }
    } 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) {
    LogForm form = (LogForm) actionForm;
    form.setStrutsAction(LogForm.EDIT);
    try {
      DataSource ds = getDataSource(request);

      LogDAO logDAO = new LogDAO(ds);

      int year = Integer.parseInt(request.getParameter("year"));
      int month = Integer.parseInt(request.getParameter("month"));

      Log log = logDAO.retrieve(year, month);
      org.apache.commons.beanutils.BeanUtils.populate(form, org.apache.commons.beanutils.BeanUtils.describe(log));
    } 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) {
    LogForm form = (LogForm) actionForm;
    form.setStrutsAction(LogForm.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) {
    LogForm form = (LogForm) actionForm;
    try {
      DataSource ds = getDataSource(request);

      LogDAO logDAO = new LogDAO(ds);

      int year = Integer.parseInt(request.getParameter("year"));
      int month = Integer.parseInt(request.getParameter("month"));
      logDAO.delete(year, month);
    } 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(" [Log] 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(" [Log] Error - " + e.getMessage());
    }
  }
}