This is the presentation I will be giving on Sunday at Silicon Valley Code Camp 2009.

1. Simple-Spring-Memcached http://code.google.com/p/simple-spring-memcached/ A library that enables your code to benefit from distributed caching (via memcached), with minimal configuration and simple annotations.

3. Sr. Software Engineer at Widgetbox, Inc

4. 10+ Years as a Software Engineer

5. http://www.nelz.net/

6. http://www.twitter.com/nelz9999

7. http://www.linkedin.com/in/nelz9999

9. Familiar with Spring

10. May be interested in adding Memcached

11. Understand the basics of Caching

12. Understand the basics of Distributed Caching

14. Spring

15. Serializable / Externalizable Objects

16. High-Read, Low-Write

17. You control (or can wrap) the methods you want to cache

18. Expensive Read Operations

19. Operational Ability to Support Memcached

20. SSM's Niche

22. Share My Learnings

23. Self-Evident Concept

27. EasyMock

29. Spring / AspectJ

30. Log4J

32. Should be transparent to main code flow

35. AOP to the Rescue!

37. <bean id=&quot;memcachedConnectionBean&quot; class=

38. &quot;net.nelz.simplesm.config.MemcachedConnectionBean&quot;>

39. <property name=&quot;consistentHashing&quot; value=&quot;true&quot; />

40. <property name=&quot;nodeList&quot; value=&quot;127.0.0.1:11211 127.0.0.1:11311&quot; />

41. </bean>

42. <aop:aspectj-autoproxy />

44. if cacheHasKey($key), return getFromCache($key)

45. $value = doExpensiveRequestForValue()

46. storeInCache($key, $value)

47. return $value

48. Gets info out of the cache

49. Also back door of putting info into the cache

50. [PS: Pertinent Negative Null]

52. Key + Namespace + Other Characters (~16)

53. No Spaces

54. Default: toString()

55. Preferred: @CacheKeyMethod

58. Bad: 123 vs 123

59. Good: Vet:123 vs Pet:123

61. assignedKey = &quot;InTheWindow&quot;,

62. namespace = &quot;DOG&quot;,

63. expiration = 300)

64. Dog getDogInWindow() {

65. ...

66. }

68. keyIndex = 0,

69. namespace = &quot;VETS&quot;,

70. expiration = 300)

71. Vet getVet(Long id) {

72. ...

73. }

75. keyIndex = 1,

76. namespace = &quot;VETS&quot;,

77. expiration = 300)

78. Vet getVet(Credentials cred, Long id) {

79. ...

80. }

82. “ KEY” -> List<Value>

84. Key -> List<Value>

86. @ReadThroughMultiCache

89. No Map support (yet?)

90. Subset Pass-Through

92. keyIndex = 0,

93. namespace = &quot;VETS&quot;,

94. expiration = 300)

95. List<Vet> getVet(List<Long> ids) {

96. ...

97. }

99. doUnderlyingOperations()

100. deleteFromCache($key)

101. Removes info from the cache

103. assignedKey = &quot;InTheWindow&quot;,

104. namespace = &quot;DOG&quot;)

105. void removeFromWindow(Dog dog) {

106. ...

107. }

109. keyIndex = 0,

110. namespace = &quot;FISH&quot;)

111. void died(Fish fish) {

112. ...

113. }

115. keyIndex = 1,

116. namespace = &quot;DOG&quot;)

117. void sellLitter(Buyer to, List<Dog> dogs) {

118. ...

119. }

121. $key = calculateValueCacheName()

122. $value = harnessValueToStore()

123. storeInCache($key, $value)

124. Puts info into the cache

126. assignedKey = &quot;InTheWindow&quot;,

127. dataIndex = -1,

128. namespace = &quot;DOG&quot;,

129. expiration = 300)

130. Dog chooseDogForWindow() {

131. ...

132. }

134. keyIndex = 0,

135. dataIndex = 0,

136. namespace = &quot;FISH&quot;,

137. expiration = 300)

138. void addToInventory(Fish fish) {

139. ...

140. }

142. keyIndex = 2,

143. dataIndex = -1,

144. namespace = &quot;DOG&quot;,

145. expiration = 300)

146. List<Dog> newLitter(Dog mom, Dog dad, List<Long> ids) {

147. ...

148. }

150. Demo...

151. Demo...

152. Demo.

154. Exceptions within the caching code should be invisible to user, other than via log

155. Commons-logging / Log4J

157. Updates on Save

159. Namespace Invalidation

160. Multi-Invalidation / Method

161. Multi-Parameter Keys

163. Cache Observers

164. Second-level cache

168. @ReturnValueKeyProvider(

169. keyProviderBeanName = “myBeanName”

170. )

172. Not Maintained?

176. Demo Code

177. Also on SlideShare

178. Gliffy.com

180. http://www.flickr.com/photos/edrabbit/3440426582/

181. http://www.flickr.com/photos/nielsvk/258851215/

182. http://www.flickr.com/photos/origomi/22442743/

183. http://www.flickr.com/photos/samcrockett/2213593924/

184. http://www.flickr.com/photos/themarkpike/83868756/

185. http://www.flickr.com/photos/bohman/210977249/

186. http://www.flickr.com/photos/red5standingby/235794106/

187. http://www.flickr.com/photos/roblee/375671072/

188. http://www.flickr.com/photos/andyandorla/239043213/

189. http://www.flickr.com/photos/chrisdag/1225937650/

190. http://www.flickr.com/photos/mechanikat/2727944748/

191. http://www.flickr.com/photos/expressmonorail/3694867130/

192. http://www.flickr.com/photos/ttstam/3833225072/

193. http://www.flickr.com/photos/vernhart/1574355240/

194. Questions Questions?