架构操练Kata：魔兽先锋

http://nealford.com/katas/list.html；译者：王瑞鹏、伍斌
大雪娱乐公司现在想要打造一款第一人称射击的 MMORPG（大型多人在线角色扮演游戏）网页游戏

用户：100万+（期望最终达到）

需求：

• 用户选择想要玩的地图，然后随机地选出技能类似的游戏角色参与游戏；
• 玩家可以通过购买内购项目来增强游戏角色的技能/装备；
• 适配任何“现代”的主流浏览器；
• 全浸式体验（音效、图形、视觉外观等）；
• 玩家可以和在可聊天范围内的其他玩家聊天；
• 玩家可以创建邀请赛锦标赛，令其邀请的其他玩家加入；
• 访客可以观察全部游戏玩家的活动，但不会被玩家看到，且不会与之互动；
• 玩家能够创建新的地图，武器，甚至是游戏规则（如单一武器，夺旗战等）；

背景信息

• 游戏的性能需要优先满足，但相比之下，当玩家数量激增时系统的可伸缩性（scalability）更加重要；
• 如果这款游戏获得成功，该公司会将其抽取出一个框架，以便销售
• 最大的花费是请艺术高手创作出视觉体验

World of Webcraft

An entertainment company wants a first-person shooter MMORPG game delivered through the browser

Users: millions+ (they hope)

Requirements:

• users choose the map they want to play in, then duke it out with randomly-selected players of roughly equal skill
• players can 'trick out' their characters with skills/equipment by sending the company money
• usable from any 'modern' Web browser
• full-immersion experience (sound, graphics, etc)
• players can 'chat' (trash talk) to other players, but only those 'within range'
• players can create invitation-only tournaments
• guests can observe all the players without being seen/interact (ghosts)
• players can create new maps, weapons, and rules

Additional Context:

• gaming performance is high priority, but scalability even more so
• if this game is successful, the company plans to extract the good bits as a framework they can sell
• biggest expense are the highly skilled artists creating the visual look and feel