The Presentation of JavaTwo 2011 @Taiwan

1. 在雲端上啜飲爪哇

2. 在雲端上啜飲爪哇 王建興 qing.chwang at gmail.com

12. 在 EC2 上部署 Java Web 應用程式 *Chris Richardson, “Running Java applications on the Amazon Elastic Compute Cloud”

18. 這正是為什麼有時候我們需要基於 PaaS 平台來開發的重要原因之一

23. 行情 *http://code.google.com/intl/en/appengine/docs/billing.html $0.64 Hourly per instance Backends ( B8 class) $0.32 Hourly per instance Backends ( B4 class) $0.16 Hourly per instance Backends ( B2 class) $0.08 Hourly per instance Backends ( B1 class) $0.30 N/A (daily) Always On $0.0001 recipients Recipients Emailed $0.45 gigabytes per month High Replication Storage $0.15 gigabytes per month Stored Data $0.10 CPU hours CPU Time $0.10 gigabytes Incoming Bandwidth $0.12 gigabytes Outgoing Bandwidth Unit cost Unit Resource

24. 架構 Request Response Web page transactions Result Browser URL fetch or E-mail More services Schedule routine Static Storage HTTP / HTTPS * 清大資工鍾葉青教授雲端計算課程講義投影片 Web interface Sandbox Runtime environment Datastore Memcache

33. 處理 Datastore 會是在 GAE 上開發應用系統的最大挑戰

34. Kind 、 Entity 、 Key 、 Property User 傳統關聯式資料庫 Datastore *Cloud Tu @TWJUG User Sport Null Null Favor2 Movie Null Null Favor3 Music Cloud 1 Music Tom 3 Null John 2 Favor1 Name PK Music Favor Cloud Name 1 Key John Name 2 Key Music ， Sport ， Movie Favor Tom Name 3 Key Kind Table Key PK Property Field Entity Row

35. Native Datastore 操作 DatastoreService datastore = DatastoreServiceFactory.getDatastoreService(); Entity employee = new Entity("Employee"); employee.setProperty("firstName", "Antonio"); employee.setProperty("lastName", "Salieri"); Date hireDate = new Date(); employee.setProperty("hireDate", hireDate); employee.setProperty("attendedHrTraining", true); datastore.put(employee); Kind Entity Key Property *Cloud Tu @TWJUG 在 Entity 的 constructor 中指定。未指定時，系統會自動指派一個 UUID 的 key

39. JDO/Query Language public byte[] getPhoto(long id) { PersistenceManager pm = PMF.get().getPersistenceManager(); String query = &quot;select from &quot; + Photo.class.getName() + &quot; where id == &quot;+id; List<Photo> photos = (List<Photo>) pm.newQuery(query).execute(); if( photos.isEmpty() ) { pm.close(); return null; } Photo p = photos.get(0); Blob content = p.getContent(); byte[] b = content.getBytes(); pm.close(); return b; }

41. EntityGroup User *Cloud Tu @TWJUG 自動產生 RootKey ParentKey Cloud Name 1 Key 自動產生 RootKey ParentKey John Name 2 Key 2 ParentKey Mary Name 3 Key 2 ParentKey Mary Name 4 Key 2 ParentKey Joe Name 5 Key A EntityGroup B EntityGroup

50. GAE 中三種類型的程式碼 Request Handler Scheduled Task Backend

61. Diggirl x Cloud

62. Diggirl x Cloud for iPhone (1/2)

63. Diggirl x Cloud for iPhone (2/2)

67. Directory Service 的原有架構 Internet API

69. 採 GAE 輔助的新架構 Internet Internet API API

76. Thanks!