Java tutorial
/* * Copyright 2011 Alibaba.com All right reserved. This software is the * confidential and proprietary information of Alibaba.com ("Confidential * Information"). You shall not disclose such Confidential Information and shall * use it only in accordance with the terms of the license agreement you entered * into with Alibaba.com. */ package com.alibaba.dubbo.governance.web.home.module.screen; import java.util.Map; import javax.servlet.ServletOutputStream; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.springframework.beans.factory.annotation.Autowired; import com.alibaba.dubbo.common.URL; import com.alibaba.dubbo.governance.web.util.WebConstants; import com.alibaba.dubbo.registry.common.domain.User; import com.alibaba.fastjson.JSON; public abstract class Restful { @Autowired private HttpServletResponse response; @Autowired HttpServletRequest request; // @Autowired // RegistryValidator registryService; protected String role = null; protected String operator = null; protected User currentUser = null; protected String operatorAddress = null; protected URL url = null; public void execute(Map<String, Object> context) throws Exception { Result result = new Result(); if (request.getParameter("url") != null) { url = URL.valueOf(URL.decode(request.getParameter("url"))); } if (context.get(WebConstants.CURRENT_USER_KEY) != null) { User user = (User) context.get(WebConstants.CURRENT_USER_KEY); currentUser = user; operator = user.getUsername(); role = user.getRole(); context.put(WebConstants.CURRENT_USER_KEY, user); } operatorAddress = (String) context.get("clientid"); if (operatorAddress == null || operatorAddress.isEmpty()) { operatorAddress = (String) context.get("request.remoteHost"); } context.put("operator", operator); context.put("operatorAddress", operatorAddress); String jsonResult = null; try { result = doExecute(context); result.setStatus("OK"); } catch (IllegalArgumentException t) { result.setStatus("ERROR"); result.setCode(3); result.setMessage(t.getMessage()); } // catch (InvalidRequestException t) { // result.setStatus("ERROR"); // result.setCode(2); // result.setMessage(t.getMessage()); // } catch (Throwable t) { result.setStatus("ERROR"); result.setCode(1); result.setMessage(t.getMessage()); } response.setContentType("application/javascript"); ServletOutputStream os = response.getOutputStream(); try { jsonResult = JSON.toJSONString(result); os.print(jsonResult); } catch (Exception e) { response.setStatus(500); os.print(e.getMessage()); } finally { os.flush(); } } protected abstract Result doExecute(Map<String, Object> context) throws Exception; }