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

import org.apache.commons.lang.exception.ExceptionUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.orm.jpa.JpaOptimisticLockingFailureException;
import org.springframework.
 
stereotype.Component;
import org.springframework.web.servlet.HandlerExceptionResolver;
import org.springframework.web.servlet.ModelAndView;

import com.xqx.fdczzxt.exception.ParameterCheckException;

/**
 * spring mvc 全域性異常捕獲處理
 * @author Wtao
 *
 */
@Component
public class GloableExceptionHandler implements
 
 HandlerExceptionResolver {
	final Logger log = LoggerFactory.getLogger(GloableExceptionHandler.class);

	@Override
	public ModelAndView resolveException(HttpServletRequest request,
			HttpServletResponse response, Object handler, Exception ex) {

		//異常日誌記錄級別設定
		if(ex instanceof ParameterCheckException
 
){
			//業務引數異常只做warn級別日誌
			log.warn(ex.getMessage(),ex);
		}else{
			log.error(ex.getMessage(),ex);
		}
		
		//特殊異常提示
		String tip = "出錯了";
		
		//樂觀鎖更新衝突
		if(ex instanceof JpaOptimisticLockingFailureException){
			tip = "更新操作衝突，請確保在同一時間只有您一人在操作該條記錄。";
		}
		
		//返回頁面異常頁面（"WEB-INF/jsp/error.jsp"）
		ModelAndView mv = new ModelAndView("error");
		mv.addObject("exception", ex);
		mv.addObject("stacktrace",ExceptionUtils.getStackTrace(ex));
		mv.addObject("tip", tip);
		return mv;
	}

}