代码下载地址:http://www.zuidaima.com/share/1838230785625088.htm
最近由于zuidaima.com注册用户的增多,qq企业邮箱发送邮件会被封禁账号导致注册后面的用户收不到周总结,所以紧急开发了一套多账号,多服务器发送邮件的程序。
大概的设计思路如下:
1.服务器可以无限扩展,但由于qq企业邮箱是限定域名,所以要想多服务器还得有多域名,多账号也不行。
2.最核心的代码是FIFO分配指定长度的邮件列表这一步,通过java线程同步Queue实现。
3.发送失败的要加到重试队列继续发送。
4.经测试每分钟发一封邮件,qq企业邮箱最大可以发送7000封邮件,这样最代码2个账号service@javaniu.com和service@zuidaima.com就可以发送到15000个邮件,该方案绝对是性价比超高的,目前市面上每封邮件1分钱,那15000也得150元人民币,如果你每周呢?
5.可以指定某个用户id来只发送某个范围的邮件列表
6.可以指定clear参数来清空所有邮件列表,不过该参数慎用,避免多发送邮件。
下面分享下核心代码,有思路和代码做参考,我想大家肯定可以自己搭建起来了:
分配邮件端核心java代码:
package com.zuidaima.mail; private final static Map<Long, Queue<User>> map = new HashMap<Long, Queue<User>>(); // 申请发邮件的邮箱地址,每次根据mailTaskCount配置来取个数 public @ResponseBody JSONObject apply_mails( @PathVariable("id") Long id, @RequestParam(value = "start_date", required = false) String startDate, @RequestParam(value = "end_date", required = false) String endDate, @RequestParam(value = "clear", required = false) String clear, @RequestParam(value = "user_id", required = false) Long user_id) throws IOException, TemplateException { JSONObject json = new JSONObject(); String error = ""; if (StringUtils.isBlank(startDate) || StringUtils.isBlank(endDate)) { error = "参数非法,startDate和endDate"; json.put("error", error); return json; } final Task task = taskService.findOneById(id); if (task.getType() != ModuleConstants.TASK_TYPE_WEEK_SUMMARY) { error = "任务" + id + "不是周总结"; json.put("error", error); return json; } Queue<User> allUsers = null; List<User> users = new ArrayList<User>(); synchronized (map) {//注意线程安全 if (StringUtils.isNotBlank(clear)) {// clear map.put(id, null); error = "任务清空成功"; json.put("error", error); return json; } allUsers = map.get(id); if (allUsers == null) { allUsers = new LinkedList<User>(); if (user_id == null) { user_id = 0l; } Page<User> page = userService .findAllReceiveMailUsersGreaterThanId(user_id, 1, Integer.MAX_VALUE); allUsers.addAll(page.getContent()); map.put(id, allUsers); } int size = allUsers.size(); if (size == 0) { error = "任务" + id + "执行完毕!"; json.put("error", error); return json; } int i = 0; while (i < mailTaskCount) { User _user = allUsers.poll(); if (_user == null) { break; } users.add(_user); i++; } } File templateFile = new File(deployPath + "/apply_week_summary_" + id + ".html"); String templdate = ""; if (templateFile.exists()) { templdate = FileUtils.readFileToString(templateFile, "utf-8"); } else { List<Long> weekSummaryShareIds = findIds(startDate, endDate); ModelMap model = new ModelMap(); Collection<Project> weekSummaryShares = projectService .findAllByIds(weekSummaryShareIds); Configuration configuration = freemarkerConfig.getConfiguration(); configuration.setDirectoryForTemplateLoading(new File(deployPath + "/WEB-INF/template/")); Template template = configuration .getTemplate("apply_week_summary.htm"); Page<Rank> weekRankUsers = rankService.findAllByType( ModuleConstants.RANK_TYPE_USER_CONTRIBUTE_WEEK, ParamConstants.DEFAULT_PAGE, ParamConstants.DEFAULT_TOP_LESS_COUNT, ModuleConstants.RANKSORT); model.put("weekRankUsers", weekRankUsers); Page<Rank> monthRankUsers = rankService.findAllByType( ModuleConstants.RANK_TYPE_USER_CONTRIBUTE_MONTH, ParamConstants.DEFAULT_PAGE, ParamConstants.DEFAULT_TOP_LESS_COUNT, ModuleConstants.RANKSORT); model.put("monthRankUsers", monthRankUsers); model.put("task", task); model.put("weekSummaryShares", weekSummaryShares); Sort sort = new Sort(Direction.DESC, "secondSort"); Page<Project> downloadProjects = projectService.findAllByType( ModuleConstants.PROJECT_TYPE_SHARE_CODE, 1, ParamConstants.DEFAULT_TOP_COUNT, sort); model.put("downloadProjects", downloadProjects); sort = new Sort(Direction.DESC, "thirdSort"); Page<Project> commentProjects = projectService.findAllByType( ModuleConstants.PROJECT_TYPE_SHARE_CODE, 1, ParamConstants.DEFAULT_TOP_COUNT, sort); model.put("commentProjects", commentProjects); StringWriter stringWriter = new StringWriter(); stringWriter.flush(); stringWriter.close(); template.process(model, stringWriter); FileUtils.writeStringToFile(templateFile, stringWriter.toString(), "utf-8"); templdate = stringWriter.toString(); } json.put("template", templdate); JSONArray usersJson = new JSONArray(); for (User user : users) { JSONObject userJson = new JSONObject(); userJson.put("id", user.getId()); userJson.put("uuid", user.getUuid()); String code = Security.encryptUnsubscribeWeeklyEmail(user.getId() + "_" + new Date().getTime()); userJson.put("unsubscribe_weekly_email_code", code); userJson.put("email", user.getEmail()); usersJson.add(userJson); } json.put("users", usersJson); json.put("error", error); json.put("title", task.getTitle()); return json; }
发送邮件端核心java代码:
package com.zuidaima.mail; public static void main(String[] args) { if (args.length < 3) { System.out .println("需要3个参数:\n第一个是task id\n第二个是开始时间,如:2014-05-05\n第三个是结束时间,如:2014-05-09\n第四个参数user_id\n第五个参数是clear,如true"); return; } String task_id = args[0]; String start_date = args[1]; String end_date = args[2]; String user_id = "0"; if (args.length >= 4) { user_id = args[3]; } String clear = ""; if (args.length >= 5) { clear = args[4]; } String url = String.format(APPLY_EMAIL_URL, task_id, start_date, end_date, user_id, clear); while (true) { String response = request(url); JSONObject json = JSONObject.fromObject(response); String error = json.getString("error"); if (StringUtils.isNotBlank(error)) { System.out.println("发送邮件结束:error:" + error); break; } JSONArray usersJson = json.getJSONArray("users"); if (usersJson.size() == 0) { System.out.println("发送邮件结束"); break; } String template = json.getString("template"); String title = json.getString("title"); int i = 1; try { List<JSONObject> failed1 = new ArrayList<JSONObject>(); for (Object _userJson : usersJson) { send(_userJson, title, template, i, failed1, usersJson.size()); i++; } if (failed1.size() == 0) { System.out.println("发送邮件结束一批"); continue; } System.out.println("第一次发送失败的邮箱列表" + failed1); Thread.sleep(1 * 60 * 60 * 1000); List<JSONObject> failed2 = new ArrayList<JSONObject>(); i = 1; for (Object userJson : failed1) { send(userJson, title, template, i, failed2, failed1.size()); i++; } if (failed2.size() == 0) { System.out.println("failed1发送邮件结束一批"); continue; } System.out.println("第二次发送失败的邮箱列表" + failed2); Thread.sleep(1 * 60 * 60 * 1000); List<JSONObject> failed3 = new ArrayList<JSONObject>(); i = 1; for (Object userJson : failed2) { send(userJson, title, template, i, failed3, failed2.size()); i++; } if (failed3.size() == 0) { System.out.println("failed2发送邮件结束一批"); continue; } System.out.println("第三次发送失败的邮箱列表" + failed3); Thread.sleep(1 * 60 * 60 * 1000); List<JSONObject> failed4 = new ArrayList<JSONObject>(); i = 1; for (Object userJson : failed3) { send(userJson, title, template, i, failed4, failed3.size()); i++; } System.out.println("最终发送失败的邮箱列表:" + failed4); } catch (Exception e) { e.printStackTrace(); } } }
线上正式环境运行截图:
java中使用FIFO队列:java.util.Queue实现多台服务器发邮件的代码,布布扣,bubuko.com
java中使用FIFO队列:java.util.Queue实现多台服务器发邮件的代码
原文:http://blog.csdn.net/yaerfeng/article/details/29174657