最代码网站中关于动态表event的设计思路
为了能将最代码整站用户的操作都展现出来,需要设计一种动态类型,既可以根据业务无限扩展,也可以指定某些用户行为是可以产生多少牛币交换的,这样就在原先javaniu的零散的表设计基础上抽象出event表
表结构如下:
CREATE TABLE `javaniu_event` ( `id` bigint(20) unsigned NOT NULL auto_increment, `create_time` datetime NOT NULL, `update_time` datetime default NULL, `event_rule_id` bigint(20) NOT NULL default '0' COMMENT '用户注册\r\n下载代码\r\n浏览分享\r\n浏览寻求\r\n收藏分享\r\n收藏寻求\r\n浏览活动\r\n追加悬赏\r\n加入活动\r\n拜师\r\n关注用户\r\n发表心情\r\n发表寻求\r\n评论寻求\r\n评论代码\r\n上传代码\r\n下载代码\r\n分享代码\r\n关注用户\r\n浏览分享\r\n浏览寻求\r\n管理员删除代码\r\n收藏分享\r\n收藏寻求\r\n获取勋章\r\n拜师傅\r\n发起活动\r\n浏览活动\r\n加入活动\r\n追加悬赏\r\n连续一周发表心情\r\n用户周贡献排行\r\n用户月贡献排行\r\n用户年贡献排行\r\n代码下载周排行\r\n代码下载月排行\r\n代码下载年排行', `user_id` bigint(20) NOT NULL default '0', `source_user_id` bigint(20) NOT NULL default '0', `source_id` bigint(20) NOT NULL default '0', `target_id` bigint(20) NOT NULL default '0', `status` int(2) NOT NULL default '0' COMMENT '-1删除0待审核2正常', `type` int(2) NOT NULL default '0', PRIMARY KEY (`id`), KEY `create_time` (`create_time`), KEY `userid_status` (`user_id`,`status`), KEY `event_rule_id_source_id` (`event_rule_id`,`source_id`), KEY `event_rule_id_status` (`event_rule_id`,`status`), KEY `type_source_id` (`type`,`source_id`) ) ENGINE=InnoDB DEFAULT CHARSET=utf8
关联表event_rule可以指定牛币规则及其动态显示信息,结构如下:
CREATE TABLE `javaniu_event_rule` ( `id` bigint(20) unsigned NOT NULL auto_increment, `create_time` datetime NOT NULL, `update_time` datetime default NULL, `type` int(1) NOT NULL COMMENT '注册+1\r\n发表心情+1\r\n连续一周发表心情+5\r\n分享代码+1\r\n分享代码被下载+n(n为分享者者自定义牛币)\r\n寻求代码-2\r\n上传代码+1\r\n上传代码被下载+1\r\n代码被设为最佳+n(n为寻求者者自定义牛币)\r\n删除代码-1\r\n无效寻求-2\r\n无效代码-2\r\n管理员奖赏+n\r\n管理员惩罚-n\r\n周top10+5\r\n月top10+10\r\n年top10+100\r\n信息完善+1\r\n包月vip+100\r\n师傅赠送+n牛币\r\n授予徽章+5牛币\r\n', `name` varchar(100) NOT NULL, `niubi` int(11) NOT NULL, `extend_json` varchar(1000) NOT NULL, PRIMARY KEY (`id`) ) ENGINE=InnoDB DEFAULT CHARSET=utf8
event的用户行为数据模型抽象如下:
模型一:用户a通过事件x产生动态0=user_id_a 0 0 0
a=>x=>0
模型二:用户a通过事件x产生产生用户a的数据1=user_id_a 0 0 1
a=>x=>1
模型三:用户a通过事件x对用户b的数据1产生用户a的数据2=user_id_a b 1 2
a=>x+b+1=>2
模型四:用户a通过事件x对用户b的数据1产生动态0=user_id_a b 1 0
a=>x+b+1=>0
模型五:用户a通过事件x对用户b产生动态0=user_id_a b 0 0
a=>x+b=>0
排列组合:
user_id source_user_id source_id target_id
user_id
user_id source_user_id
user_id source_user_id source_id
user_id source_user_id source_id target_id
这样就囊括了所有会出现的用户event,只要在java层做业务转换即可:
最核心的event数据转换java类源码:
package com.zuidaima.core.service.impl; private void setSourceAndTarget(Event event, EventRule _eventRule) { try { EventRule eventRule = new EventRule(); eventRule.setCreateTime(_eventRule.getCreateTime()); eventRule.setExtendJson(_eventRule.getExtendJson()); eventRule.setId(_eventRule.getId()); eventRule.setName(_eventRule.getName()); eventRule.setNiubi(_eventRule.getNiubi()); eventRule.setType(_eventRule.getType()); eventRule.setUpdateTime(_eventRule.getUpdateTime()); BaseEntity source = null; BaseEntity target = null; long sourceId = event.getSourceId(); long targetId = event.getTargetId(); JSONObject extend = eventRule.getExtend(); extend = eventRule.getExtend(); String description = (String) extend.get("description"); String _description = null; Answer answer = null; Project project = null; switch (eventRule.getType()) { case ModuleConstants.EVENT_TYPE_RULE_PROJECT_CREATE: case ModuleConstants.EVENT_TYPE_RULE_PROJECT_DELETE_BY_USER: case ModuleConstants.EVENT_TYPE_RULE_PROJECT_DELETE_BY_ADMIN: case ModuleConstants.EVENT_TYPE_RULE_PROJECT_VIEW: case ModuleConstants.EVENT_TYPE_RULE_PROJECT_COLLECT: case ModuleConstants.EVENT_TYPE_RULE_PROJECT_REWARD: if (sourceId > 0) { source = projectService.findOneById(sourceId); } if (targetId > 0) { target = projectService.findOneById(targetId); } project = (Project) target; if (source != null) { project = (Project) source; } if (project == null) { return; } _description = String.format( description, ModuleConstants.PROJECT_TYPE_DESC_MAP.get( project.getType()).getDesc()); break; case ModuleConstants.EVENT_TYPE_RULE_POST_CREATE: case ModuleConstants.EVENT_TYPE_RULE_POST_DELETE_BY_USER: case ModuleConstants.EVENT_TYPE_RULE_POST_DELETE_BY_ADMIN: if (sourceId > 0) { source = postService.findOneById(sourceId); } if (targetId > 0) { target = postService.findOneById(targetId); } Post post = (Post) target; if (source != null) { post = (Post) source; } _description = String.format(description, ModuleConstants.POST_TYPE_DESC_MAP.get(post.getType())); break; // case ModuleConstants.EVENT_TYPE_RULE_GROUP_CREATE://暂时没有这种动态 case ModuleConstants.EVENT_TYPE_RULE_GROUP_JOIN_IN: case ModuleConstants.EVENT_TYPE_RULE_GROUP_DELETE_BY_USER: // case // ModuleConstants.EVENT_TYPE_RULE_GROUP_DELETE_BY_ADMIN://暂时没有这种动态 if (sourceId > 0) { source = groupService.findOneById(sourceId); } if (targetId > 0) { target = groupService.findOneById(targetId); } Group group = (Group) source; _description = String .format(description, ModuleConstants.GROUP_TYPE_DESC_MAP.get(group .getType())); break; case ModuleConstants.EVENT_TYPE_RULE_COMMENT_CREATE: case ModuleConstants.EVENT_TYPE_RULE_COMMENT_DELETE_BY_USER: case ModuleConstants.EVENT_TYPE_RULE_COMMENT_DELETE_BY_ADMIN: target = commentService.findOneById(targetId); Comment comment = (Comment) target; int commentType = comment.getType(); if (commentType == ModuleConstants.COMMENT_TYPE_ANSWER) { source = answerService.findOneById(sourceId); answer = (Answer) source; project = (Project) answer.getTarget(); _description = String.format( description, ModuleConstants.PROJECT_TYPE_DESC_MAP.get( project.getType()).getDesc()); } else if (commentType == ModuleConstants.COMMENT_TYPE_PROJECT) { source = projectService.findOneById(sourceId); project = (Project) source; _description = String.format( description, ModuleConstants.PROJECT_TYPE_DESC_MAP.get( project.getType()).getDesc()); } else if (commentType == ModuleConstants.COMMENT_TYPE_POST) { source = postService.findOneById(sourceId); post = (Post) source; _description = String.format(description, ModuleConstants.POST_TYPE_DESC_MAP.get(post .getType())); } else { } break; case ModuleConstants.EVENT_TYPE_RULE_ANSWER_CREATE: case ModuleConstants.EVENT_TYPE_RULE_ANSWER_BEEN_SET_PERFECT: source = projectService.findOneById(sourceId); target = answerService.findOneById(targetId); project = (Project) source; _description = String.format( description, ModuleConstants.PROJECT_TYPE_DESC_MAP.get( project.getType()).getDesc()); break; case ModuleConstants.EVENT_TYPE_RULE_ANSWER_GET: case ModuleConstants.EVENT_TYPE_RULE_ANSWER_DELETE_BY_USER: case ModuleConstants.EVENT_TYPE_RULE_ANSWER_DELETE_BY_ADMIN: source = answerService.findOneById(sourceId); answer = (Answer) source; Project _project = (Project) answer.getTarget(); _description = String.format( description, ModuleConstants.PROJECT_TYPE_DESC_MAP.get( _project.getType()).getDesc()); break; case ModuleConstants.EVENT_TYPE_RULE_REPUTATION_CREATE: if (sourceId > 0) { source = reputationService.findOneById(sourceId); } if (targetId > 0) { target = reputationService.findOneById(targetId); } break; case ModuleConstants.EVENT_TYPE_RULE_USER_FOLLOW: source = userService.findOneById(sourceId); User _user = (User) source; _description = String .format(description, "<a href='/user/n/" + _user.getName() + ".htm'>" + _user.getName() + "</a>"); break; case ModuleConstants.EVENT_TYPE_RULE_MENTION_COMMENT: target = commentService.findOneById(targetId); comment = (Comment) target; commentType = comment.getType(); if (commentType == ModuleConstants.COMMENT_TYPE_ANSWER) { source = answerService.findOneById(sourceId); answer = (Answer) source; project = (Project) answer.getTarget(); _description = String.format( description, ModuleConstants.PROJECT_TYPE_DESC_MAP.get( project.getType()).getDesc()); } else if (commentType == ModuleConstants.COMMENT_TYPE_PROJECT) { source = projectService.findOneById(sourceId); project = (Project) source; _description = String.format( description, ModuleConstants.PROJECT_TYPE_DESC_MAP.get( project.getType()).getDesc()); } else if (commentType == ModuleConstants.COMMENT_TYPE_POST) { source = postService.findOneById(sourceId); post = (Post) source; _description = String.format(description, ModuleConstants.POST_TYPE_DESC_MAP.get(post .getType())); } else { } break; case ModuleConstants.EVENT_TYPE_RULE_MENTION_POST: source = postService.findOneById(sourceId); break; default: _description = description; } extend.put("description", _description); eventRule.setExtend(extend); eventRule.setExtendJson(extend.toString()); event.setEventRule(eventRule); event.setSource(source); event.setTarget(target); } catch (Exception e) { logger.error("Fail to setSourceAndTarget event:" + event); } }
freemarker显示层转换核心代码:
<#switch event.eventRule.type> <#case event_type_rule_post_create> <@event_post_macro event.target/> <#break> <#case event_type_rule_project_create> <@event_project_macro event event.target/> <#break> <#case event_type_rule_project_view> <#case event_type_rule_project_collect> <#case event_type_rule_project_reward> <@event_project_macro event event.source/> <#break> <#case event_type_rule_comment_create> <@event_comment_macro event event.target/> <#break> <#case event_type_rule_answer_create> <@event_answer_macro event event.target/> <#break> <#case event_type_rule_answer_get> <#case event_type_rule_answer_been_set_perfect> <@event_answer_macro event event.source/> <#break> <#case event_type_rule_mention_comment> <@event_comment_macro event event.target/> <#break> <#case event_type_rule_mention_post> <@event_post_macro event.source/> <#break> </#switch>
比如其中一种event type的freemarker macro代码如下:
<!--event post--> <#macro event_post_macro post> <div class="content margin_top5"> ${post.contentExt} <span class="comments_count"> <a target="_blank" href="/mood/${post.id}/comment.htm" rel="nofollow"><img alt="${post.thirdSort}个评论" src="/resource/img/comment.gif"> ${post.thirdSort}</a> </span> </div> </#macro>
这样的设计符合高内聚低耦合的设计思路,未来可以根据业务实现无限扩张,当然代价就是event表越来越大,但可以通过分库分表来分担压力,大家可以参考下,有好的意见可以留言。
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