{"id":183,"date":"2012-04-09T15:02:49","date_gmt":"2012-04-09T06:02:49","guid":{"rendered":"http:\/\/lab.synergy-marketing.co.jp\/blog\/?p=183"},"modified":"2018-11-14T16:34:00","modified_gmt":"2018-11-14T07:34:00","slug":"scala-%e3%81%a7-di-effective-scala-lift-%e3%81%aedi%e7%b7%a8","status":"publish","type":"post","link":"https:\/\/www.techscore.com\/blog\/2012\/04\/09\/scala-%e3%81%a7-di-effective-scala-lift-%e3%81%aedi%e7%b7%a8\/","title":{"rendered":"Scala \u3067 DI (Effective Scala \/ Lift \u306eDI\u7de8)"},"content":{"rendered":"

\u3053\u3093\u306b\u3061\u306f\u3001\u99ac\u5834\u3067\u3059\u3002<\/p>\n

\u524d\u56de\u306fScala\u306eDI\u306e\u30d1\u30bf\u30fc\u30f3\u3068\u3057\u3066\u306f\u6700\u3082\u6709\u540d\u306aCake Pattern\u3092\u7d39\u4ecb\u3057\u307e\u3057\u305f\u3002\u4eca\u56de\u306fDI\u306e\u4ed6\u306e\u30d1\u30bf\u30fc\u30f3\u3082\u7d39\u4ecb\u3057\u305f\u3044\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\n

Twitter \u3067\u306eScala DI<\/h2>\n

\u3055\u3066\u3001\u5c11\u3057\u524d\u306bTwitter \u304cScala \u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/a>\u3092github\u4e0a\u306b\u516c\u958b\u3057\u307e\u3057\u305f\u3002DI\u306b\u3064\u3044\u3066\u306f\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u8a00\u3063\u3066\u3044\u307e\u3059\u306d\uff08\u304b\u306a\u308a\u610f\u8a33\u3067\u3059\uff09\u3002<\/p>\n

\n\u3000Scala \u306bmixin\u306e\u4ed5\u7d44\u307f\u3092\u5c0e\u5165\u3057\u305f\u306e\u306f\u3001\u4f1d\u7d71\u7684\u306aDI\u306e\u624b\u6cd5\u3092\u3084\u3081\u305f\u304b\u3063\u305f\u304b\u3089\u3060\u3068\u601d\u3046\u3002\u65b0\u65b9\u5f0f\u306e\u6700\u305f\u308b\u3082\u306e\u304c\u300cCake pattern\u300d\u3060\u308d\u3046\u3002
\n(\u7565\uff09
\n\u3000\u3051\u3069\u3001Scala\u3092\u5229\u7528\u3059\u308b\u3060\u3051\u3067\u3001\u53e4\u5178\u7684DI\u624b\u6cd5\u306e\u554f\u984c\u70b9\u306f\u3060\u3044\u305f\u3044\u89e3\u6c7a\u3067\u304d\u308b\u3068\u611f\u3058\u308b\u3002(\u7565\uff09\u3060\u304b\u3089\u3001\u79c1\u305f\u3061\u306f\u3042\u307e\u308a\u7d99\u627f\u305b\u305a\u306b\u69cb\u9020\u5316\u3057\u3088\u3046\u3068\u6c7a\u3081\u305f\u3002\u305d\u306e\u65b9\u304c\u30e2\u30b8\u30e5\u30fc\u30eb\u6027\u304c\u9ad8\u304f\u30c6\u30b9\u30c8\u3057\u3084\u3059\u3044\u30d7\u30ed\u30b0\u30e9\u30e0\u304c\u3067\u304d\u308b\u3068\u601d\u3046\u304b\u3089\u3002\n<\/p><\/blockquote>\n

\u300c\u4f1d\u7d71\u7684\u306aDI\u306e\u624b\u6cd5\u300d\u3068\u3044\u3046\u306e\u306f\u3001Spring\u3068\u540c\u3058\u3088\u3046\u306b\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u3067\u90e8\u54c1\u3092\u8a2d\u5b9a\u3057\u3066\u3044\u304f\u65b9\u6cd5\u3067\u3059\u3002\u53d6\u308a\u66ff\u3048\u305f\u3044\u90e8\u54c1\u306etrait\u3092\u4f5c\u6210\u3059\u308b\u3068\u3053\u308d\u307e\u3067\u306fCake Patten\u3068\u4e00\u7dd2\u3067\u3059\u3002<\/p>\n

[scala]
\n trait TwitterApi {<\/p>\n

def getProfile(twitterId:String):String<\/p>\n

}
\n[\/scala]<\/p>\n

ProfileService\u3067TwitterApi\u3092\u5229\u7528\u3057\u305f\u3044\u306e\u3067\u3001\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u3067\u6e21\u3057\u307e\u3059\u3002
\n[scala]
\n class ProfileService(twitterApi:TwitterApi) {<\/p>\n

def count(twitterId:String) = twitterApi.getProfile(twitterId).length<\/p>\n

}
\n[\/scala]<\/p>\n

Scala\u3067\u3059\u306e\u3067\u3001\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u5f15\u6570\u3067Factory \u30e1\u30bd\u30c3\u30c9\u3092\u6e21\u3059\u4e8b\u3082\u3067\u304d\u307e\u3059\u3002\u3053\u3046\u3059\u308b\u3053\u3068\u306b\u3088\u308a\u90e8\u54c1\u306e\u751f\u6210\uff0f\u8a2d\u5b9a\u304c\u67d4\u8edf\u306b\u3067\u304d\u307e\u3059\u3002<\/p>\n

[scala]
\nclass ProfileService( connectTwitter: String => TwitterApi){<\/p>\n

def count(twitterId:String) = connectTwitter(authCode).getProfile(twitterId).length<\/p>\n

}
\n[\/scala]<\/p>\n

\u30b3\u30f3\u30c6\u30ca\u306b\u3042\u305f\u308bobject\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u306a\u308b\u3067\u3057\u3087\u3046\u304b\u3002<\/p>\n

[scala]
\nobject ComponentRegistry{<\/p>\n

val twitterApi = new TwitterApiImpl()<\/p>\n

val profileService = new ProfileService(twitterApi)<\/p>\n

}
\n[\/scala]<\/p>\n

\u30b3\u30fc\u30c9\u4e2d\u3067<\/p>\n

[scala]
\n val profileService = ComponentRegistry.profileService
\n[\/scala]<\/p>\n

\u306e\u3088\u3046\u306b\u3001ComponentRegistry\u304b\u3089profileService\u3092\u53d6\u5f97\u3059\u308b\u3068\u3053\u308d\u3082CakePattern\u3068\u540c\u3058\u3067\u3059\u3002\u3053\u306e\u30d1\u30bf\u30fc\u30f3\u3092\u5229\u7528\u3059\u308c\u3070\u3001trait\u796d\u308a\u304c\u89e3\u6d88\u3055\u308c\u308b\u306e\u3067\u3060\u3044\u3076\u3059\u3063\u304d\u308a\u3057\u3066\u3044\u3044\u3067\u3059\u306d\u3002<\/p>\n

Lift \u3067\u306eDI<\/h2>\n

CakePattern \u3084 Twitter \u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u3067\u306f\u3001\u3069\u306e\u3088\u3046\u306b\u30af\u30e9\u30b9\u3092\u3064\u304f\u308b\u3068\u53d6\u308a\u66ff\u3048\u3084\u3059\u3044\u304b\u3001\u3068\u3044\u3046\u3053\u3068\u306b\u6ce8\u76ee\u3057\u3066\u3044\u305f\u3068\u601d\u3044\u307e\u3059\u3002\u5bfe\u3057\u3066\u3001ComponentRegistry\u3092\u9ad8\u6a5f\u80fd\u306b\u3057\u3066\u3001\u5834\u9762\u3054\u3068\u306b\u9069\u5207\u306a\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u63d0\u4f9b\u3057\u3066\u3082\u3089\u3046\u3088\u3046\u306b\u3057\u3088\u3046\u3001\u3068\u3044\u3046\u306e\u304c\u3001Lift<\/a>\u3067\u3059\u3002<\/p>\n

\u3000Lift\u306b\u306f\u3001DI \u30b3\u30f3\u30c6\u30ca\u306e\u57fa\u5e95\u3068\u306a\u308bSimpleInjector\u3068\u3044\u3046\u30af\u30e9\u30b9\u304c\u3042\u308a\u307e\u3059\u3002SimpleInjector\u5185\u3067\u306f\u53d6\u308a\u66ff\u3048\u53ef\u80fd\u90e8\u54c1\u3068\u3057\u3066\u5229\u7528\u3057\u305f\u3044\u30af\u30e9\u30b9\u3092\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u5ba3\u8a00\u3057\u307e\u3059\u3002<\/p>\n

[scala]
\nobject ComponentRegistry extends SimpleInjector{<\/p>\n

val twitterApi = new Inject(new TwiterApiImpl){}<\/p>\n

}
\n[\/scala]<\/p>\n

TwitterApi \u305d\u306e\u3082\u306e\u3067\u306f\u306a\u304f\u3001TwitterApiImpl\u3092\u5f15\u6570\u306b\u3068\u308bInject\u3068\u3044\u3046\u30af\u30e9\u30b9\u3092\u5b9a\u7fa9\u3057\u307e\u3059\u3002
\nTwitterApi \u3092\u5229\u7528\u3059\u308bProfileService\u3067\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306bComponentRegistry\u304b\u3089TwitterApi\u3092\u53d6\u5f97\u3057\u307e\u3059\u3002<\/p>\n

[scala]
\n class ProfileService {<\/p>\n

def count(twitterId:String) = ComponentRegistry.twitterApi.vend.getProfile(twitterId).length \/\/ vend\u3067TwitterApiImpl\u3092\u53d6\u5f97\u3059\u308b<\/p>\n

}
\n[\/scala]<\/p>\n

\u3055\u3066\u3053\u3053\u304b\u3089\u304cSimpleInjector\u306e\u4fbf\u5229\u306a\u3068\u3053\u308d\u306a\u306e\u3067\u3059\u304c\u3001SimpleInjector\u306f\u30b9\u30b3\u30fc\u30d7\u5185\u3067\u63d0\u4f9b\u3059\u308b\u30af\u30e9\u30b9\u3092\u5909\u66f4\u3059\u308b\u6a5f\u80fd\u3092\u6301\u3063\u3066\u3044\u307e\u3059\u3002
\n\u3053\u306e\u6a5f\u80fd\u3092\u5229\u7528\u3059\u308b\u3068\u3001\u30c6\u30b9\u30c8\u30e1\u30bd\u30c3\u30c9\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u306a\u308b\u3067\u3057\u3087\u3046\u3002<\/p>\n

[scala]
\nclass ProfileServiceTest extends UniFunSuite with ShouldMatchers {<\/p>\n

test("\u30d7\u30ed\u30d5\u30a1\u30a4\u30eb\u306e\u6587\u5b57\u6570\u3092\u6570\u3048\u308b"){
\n val twitterApi = Mockito.mock(classOf[TwitterApi])
\n Mockito.when(twitterApi.getProfile("AyakoBaba")).thenReturn("\u99ac\u5834\u5f69\u5b50\u306e\u30d7\u30ed\u30d5\u30a3\u30fc\u30eb")<\/p>\n

ComponentRetistry.twitterApi.doWith(twitterApi){
\n val result = new ProfileService(twitterApi).getProfile("AyakoBaba")
\n result should be (11)
\n }<\/p>\n

}<\/p>\n

}
\n[\/scala]<\/p>\n

Inject\u306edoWith\u30e1\u30bd\u30c3\u30c9\u3092\u5229\u7528\u3059\u308c\u3070\u3001\u95a2\u6570\u30d6\u30ed\u30c3\u30af\u5185\u3067\u306fComponentRegistry.twitterApi.vend\u3067\u30e2\u30c3\u30af\u306etwitterApi\u3092\u53d6\u5f97\u3067\u304d\u307e\u3059\u3002<\/p>\n

\u3053\u306eSimpleInjector\u306f\u3001Lift \u306eWeb \u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3092\u63a1\u7528\u3057\u306a\u304f\u3066\u3082\u5358\u72ec\u3067\u5229\u7528\u53ef\u80fd\u306a\u30af\u30e9\u30b9\u3067\u3059\u306e\u3067\u3001\u8208\u5473\u304c\u3042\u308b\u65b9\u306f\u305c\u3072\u3002<\/p>\n

\u6700\u5f8c\u306b<\/h2>\n

\u3000\u3053\u3053\u307e\u3067Scala\u3067\u306eDI\u306e\u65b9\u6cd5\u3092\u3044\u308d\u3044\u308d\u7d39\u4ecb\u3057\u3066\u304d\u307e\u3057\u305f\u304c\u3001\u3044\u304b\u304c\u3060\u3063\u305f\u3067\u3057\u3087\u3046\u304b\u3002\u500b\u4eba\u7684\u306b\u306f\u3001Twitter\u65b9\u5f0f\u304c\u4e00\u756a\u3059\u3063\u304d\u308a\u3001\u30af\u30e9\u30b9\u304c\u5229\u7528\u3057\u3066\u3044\u308b\u90e8\u54c1\u3001\u69cb\u6210\u304c\u308f\u304b\u308a\u3084\u3059\u304f\u3044\u3044\u306a\u3001\u3068\u601d\u3044\u307e\u3057\u305f\u304c\u3001\u305d\u3053\u306f\u79c1\u304cOO\u306b\u6163\u308c\u3066\u3044\u308b\u304b\u3089\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u3002\u3044\u305a\u308c\u306b\u3057\u308d\u3001Twitter\u3055\u3093\u306e\u8a00\u3046\u3068\u304a\u308a\u3001DI\u306f\u30e2\u30b8\u30e5\u30e9\u30ea\u30c6\u30a3\u3068\u30c6\u30b9\u30bf\u30d3\u30ea\u30c6\u30a3\u306e\u5411\u4e0a\u306e\u305f\u3081\u306b\u306f\u5c0e\u5165\u3059\u308b\u3079\u304d\u3001\u3068\u65ad\u8a00\u3057\u307e\u3059\uff01\u307e\u3060\u307e\u3060\u5b9a\u756a\u306e\u65b9\u6cd5\u304c\u306a\u3044Scala\u3067\u3059\u304c\u3001\u3044\u308d\u3044\u308d\u6a21\u7d22\u3057\u3066\u3044\u304d\u305f\u3044\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

\u3053\u3093\u306b\u3061\u306f\u3001\u99ac\u5834\u3067\u3059\u3002<\/p>\n

\u524d\u56de\u306fScala\u306eDI\u306e\u30d1\u30bf\u30fc\u30f3\u3068\u3057\u3066\u306f\u6700\u3082\u6709\u540d\u306aCake Pattern\u3092\u7d39\u4ecb\u3057\u307e\u3057\u305f\u3002\u4eca\u56de\u306fDI\u306e\u4ed6\u306e\u30d1\u30bf\u30fc\u30f3\u3082\u7d39\u4ecb\u3057\u305f\u3044\u3068\u601d\u3044\u307e\u3059\u3002
\u7d9a\u304d\u3092\u8aad\u3080...<\/a><\/p>\n","protected":false},"author":23,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[254,18],"tags":[],"_links":{"self":[{"href":"https:\/\/www.techscore.com\/blog\/wp-json\/wp\/v2\/posts\/183"}],"collection":[{"href":"https:\/\/www.techscore.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.techscore.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.techscore.com\/blog\/wp-json\/wp\/v2\/users\/23"}],"replies":[{"embeddable":true,"href":"https:\/\/www.techscore.com\/blog\/wp-json\/wp\/v2\/comments?post=183"}],"version-history":[{"count":1,"href":"https:\/\/www.techscore.com\/blog\/wp-json\/wp\/v2\/posts\/183\/revisions"}],"predecessor-version":[{"id":13915,"href":"https:\/\/www.techscore.com\/blog\/wp-json\/wp\/v2\/posts\/183\/revisions\/13915"}],"wp:attachment":[{"href":"https:\/\/www.techscore.com\/blog\/wp-json\/wp\/v2\/media?parent=183"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.techscore.com\/blog\/wp-json\/wp\/v2\/categories?post=183"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.techscore.com\/blog\/wp-json\/wp\/v2\/tags?post=183"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}