{"id":50510,"date":"2022-11-28T06:16:18","date_gmt":"2023-04-30T05:17:49","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e7%94%a8scala%e6%9d%a5%e6%90%9elagom%ef%bc%81%e3%80%90%e7%ac%ac%e4%ba%8c%e9%83%a8%e5%88%86%ef%bc%9a%e5%88%9b%e5%bb%ba%e6%9c%80%e5%b0%8f%e6%9c%8d%e5%8a%a1%e3%80%91\/"},"modified":"2024-04-29T02:48:20","modified_gmt":"2024-04-28T18:48:20","slug":"%e7%94%a8scala%e6%9d%a5%e6%90%9elagom%ef%bc%81%e3%80%90%e7%ac%ac%e4%ba%8c%e9%83%a8%e5%88%86%ef%bc%9a%e5%88%9b%e5%bb%ba%e6%9c%80%e5%b0%8f%e6%9c%8d%e5%8a%a1%e3%80%91","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e7%94%a8scala%e6%9d%a5%e6%90%9elagom%ef%bc%81%e3%80%90%e7%ac%ac%e4%ba%8c%e9%83%a8%e5%88%86%ef%bc%9a%e5%88%9b%e5%bb%ba%e6%9c%80%e5%b0%8f%e6%9c%8d%e5%8a%a1%e3%80%91\/","title":{"rendered":"\u7528Scala\u6765\u641eLagom\uff01\u3010\u7b2c\u4e8c\u90e8\u5206\uff1a\u521b\u5efa\u6700\u5c0f\u670d\u52a1\u3011"},"content":{"rendered":"

\u6211\u662fGaku\u3002
\n\u5f00\u59cb\u7528Scala\u505aLagom\uff01\u3010\u7b2c1\u90e8\u5206\uff1a\u73af\u5883\u8bbe\u7f6e\u3011
\n\u4e4b\u524d\u5b8c\u6210\u4e86\u73af\u5883\u8bbe\u7f6e\uff0c\u6240\u4ee5\u8fd9\u6b21\u8981\u521b\u5efa\u4e00\u4e2a\u65b0\u7684\u670d\u52a1\u3002
\n\u63d0\u4f9b\u7684Hello World\u4e2d\u5305\u542b\u4e86\u5f88\u591a\u5185\u5bb9\uff0c\u7406\u89e3\u8d77\u6765\u6709\u4e9b\u56f0\u96be\uff0c\u6240\u4ee5\u6211\u5c06\u8fdb\u4e00\u6b65\u7b80\u5316\u4ee3\u7801\uff0c\u53ea\u521b\u5efa\u4e00\u4e2a\u6700\u57fa\u672c\u7684\u80fd\u5de5\u4f5c\u7684\u670d\u52a1\uff08\u53ea\u80fd\u901a\u8fc7Get\u65b9\u6cd5\u83b7\u53d6\u4e00\u4e2a\u5b57\u7b26\u4e32\uff09\u3002<\/p>\n

\u6211\u5011\u9019\u6b21\u5275\u5efa\u7684\u7a0b\u5f0f\u78bc<\/h1>\n

\u8fd9\u662f\u5728\u8fd9\u91cc\u3002
\nhttps:\/\/github.com\/gaku3601\/study-lagom\/tree\/step2<\/p>\n

\u521b\u5efaapi\u548cimpl\u6587\u4ef6\u5939\u3002<\/h2>\n
\"image.png\"<\/div>\n

\u6dfb\u52a0\u6a21\u5757<\/h2>\n

\u5c06study-lagom\/build.sbt\u8fdb\u884c\u5982\u4e0b\u4fee\u6b63\u3002<\/p>\n

organization<\/span> in<\/span> ThisBuild<\/span> :=<\/span> \"com.example\"<\/span>\r\nversion<\/span> in<\/span> ThisBuild<\/span> :=<\/span> \"1.0-SNAPSHOT\"<\/span>\r\n\r\n\/\/ the Scala version that will be used for cross-compiled libraries<\/span>\r\nscalaVersion<\/span> in<\/span> ThisBuild<\/span> :=<\/span> \"2.13.0\"<\/span>\r\n\r\nval<\/span> macwire<\/span> =<\/span> \"com.softwaremill.macwire\"<\/span> %%<\/span> \"macros\"<\/span> %<\/span> \"2.3.3\"<\/span> %<\/span> \"provided\"<\/span>\r\nval<\/span> scalaTest<\/span> =<\/span> \"org.scalatest\"<\/span> %%<\/span> \"scalatest\"<\/span> %<\/span> \"3.1.1\"<\/span> %<\/span> Test<\/span>\r\n\r\n\/\/ \u8ffd\u8a18<\/span>\r\nlazy<\/span> val<\/span> `<\/span>study<\/span>-<\/span>lagom` = (project in file(\".\"))\r\n  .aggregate(`my<\/span>-<\/span>study<\/span>-<\/span>lagom<\/span>-<\/span>api`, `my<\/span>-<\/span>study<\/span>-<\/span>lagom<\/span>-<\/span>impl`, `study<\/span>-<\/span>lagom<\/span>-<\/span>api`, `study<\/span>-<\/span>lagom<\/span>-<\/span>impl`, `study<\/span>-<\/span>lagom<\/span>-<\/span>stream<\/span>-<\/span>api`, `study<\/span>-<\/span>lagom<\/span>-<\/span>stream<\/span>-<\/span>impl`)\r\n\r\n\/\/ \u8ffd\u52a0\r\nlazy val `my<\/span>-<\/span>study<\/span>-<\/span>lagom<\/span>-<\/span>api` = (project in file(\"my-study-lagom-api\"))\r\n  .settings(\r\n    libraryDependencies ++= Seq(\r\n      lagomScaladslApi\r\n    )\r\n  )\r\n\r\n\/\/ \u8ffd\u52a0\r\nlazy val `my<\/span>-<\/span>study<\/span>-<\/span>lagom<\/span>-<\/span>impl` = (project in file(\"my-study-lagom-impl\"))\r\n  .enablePlugins(LagomScala)\r\n  .settings(\r\n    libraryDependencies ++= Seq(\r\n      macwire,\r\n    )\r\n  )\r\n  .dependsOn(`my<\/span>-<\/span>study<\/span>-<\/span>lagom<\/span>-<\/span>api`)\r\n\r\nlazy val `study<\/span>-<\/span>lagom<\/span>-<\/span>api` = (project in file(\"study-lagom-api\"))\r\n  .settings(\r\n    libraryDependencies ++= Seq(\r\n      lagomScaladslApi\r\n    )\r\n  )\r\n\r\nlazy val `study<\/span>-<\/span>lagom<\/span>-<\/span>impl` = (project in file(\"study-lagom-impl\"))\r\n  .enablePlugins(LagomScala)\r\n  .settings(\r\n    libraryDependencies ++= Seq(\r\n      lagomScaladslPersistenceCassandra,\r\n      lagomScaladslKafkaBroker,\r\n      lagomScaladslTestKit,\r\n      macwire,\r\n      scalaTest\r\n    )\r\n  )\r\n  .settings(lagomForkedTestSettings)\r\n  .dependsOn(`study<\/span>-<\/span>lagom<\/span>-<\/span>api`)\r\n\r\nlazy val `study<\/span>-<\/span>lagom<\/span>-<\/span>stream<\/span>-<\/span>api` = (project in file(\"study-lagom-stream-api\"))\r\n  .settings(\r\n    libraryDependencies ++= Seq(\r\n      lagomScaladslApi\r\n    )\r\n  )\r\n\r\nlazy val `study<\/span>-<\/span>lagom<\/span>-<\/span>stream<\/span>-<\/span>impl` = (project in file(\"study-lagom-stream-impl\"))\r\n  .enablePlugins(LagomScala)\r\n  .settings(\r\n    libraryDependencies ++= Seq(\r\n      lagomScaladslTestKit,\r\n      macwire,\r\n      scalaTest\r\n    )\r\n  )\r\n  .dependsOn(`study<\/span>-<\/span>lagom<\/span>-<\/span>stream<\/span>-<\/span>api`, `study<\/span>-<\/span>lagom<\/span>-<\/span>api<\/span>`)<\/span>\r\n\r\n<\/code><\/pre>\n
\"image.png\"<\/div>\n
\u8fdb\u884c<\/h1>\n
\u9996\u5148\uff0c\u6211\u5df2\u7ecf\u5bf9\u6211\u7406\u89e3\u7684\u90e8\u5206\u505a\u4e86\u8bc4\u8bba\u3002\u5bf9\u4e8e\u6211\u8fd8\u6ca1\u6709\u7406\u89e3\u7684\u90e8\u5206\uff0c\u6211\u5199\u4e86\u4e00\u4e9b\u6a21\u7cca\u7684\u8bc4\u8bba\uff0c\u5982\u679c\u60a8\u53ef\u4ee5\u5ffd\u7565\u7684\u8bdd\u6211\u4f1a\u5f88\u611f\u6fc0\u3002\uff08\u8fd9\u53ea\u662f\u6211\u81ea\u5df1\u7684\u5907\u5fd8\u5f55\u3002\u5982\u679c\u6211\u7406\u89e3\u4e86\uff0c\u6211\u4f1a\u8fdb\u884c\u66f4\u65b0\u7684\u3002\uff09<\/p>\n
API\u7684\u5b9e\u73b0<\/h2>\n
\"image.png\"<\/div>\n
\u6240\u4ee5\uff0c\u4ee5\u8fd9\u6837\u7684\u65b9\u5f0f\u8fdb\u884c\u5b9e\u65bd\u3002<\/p>\n
package<\/span> com.example.mystudylagom.api<\/span>\r\n\r\nimport<\/span> akka.NotUsed<\/span>\r\nimport<\/span> com.lightbend.lagom.scaladsl.api.<\/span>{<\/span>Descriptor<\/span>,<\/span> Service<\/span>,<\/span> ServiceCall<\/span>}<\/span>\r\n\r\ntrait<\/span> MyStudyLagomService<\/span> extends<\/span> Service<\/span> {<\/span>\r\n\r\n  \/**\r\n    * Example: curl http:\/\/localhost:9000\/api\/hello2\/Alice\r\n    * id: string\u306b\u306f\/api\/hello2\/:id\u306eid\u304c\u5165\u3063\u3066\u304f\u308b\r\n    * ServiceCall[NotUsed, String]\u306eNotUsed\u90e8\u5206\u306b\u306frequest body\u304c\u3001String\u306fresponse\u306e\u80a9\r\n    *  \u4eca\u56de\u3001request body\u306fNotUsed\u3067\u4f7f\u308f\u306a\u3044\u3053\u3068\u3092\u5ba3\u8a00\u3057\u3066\u3044\u308b\u2192\u3064\u307e\u308a\u53d6\u5f97\u51e6\u7406\r\n    *  lagom\u306fServiceCall[NotUsed, String]\u81ea\u52d5\u7684\u306bGet\u30e1\u30bd\u30c3\u30c9\u3068\u5224\u65ad\u3059\u308b\r\n    *\/<\/span>\r\n  def<\/span> hello<\/span>(<\/span>id<\/span>:<\/span> String<\/span>)<\/span>:<\/span> ServiceCall<\/span>[<\/span>NotUsed<\/span>, String<\/span>]<\/span>\r\n\r\n  override<\/span> final<\/span> def<\/span> descriptor<\/span>:<\/span> Descriptor<\/span> =<\/span> {<\/span>\r\n    import<\/span> Service._<\/span>\r\n    named<\/span>(<\/span>\"my-study-lagom\"<\/span>)<\/span>\r\n      .<\/span>withCalls<\/span>(<\/span>\r\n        pathCall<\/span>(<\/span>\"\/api\/hello2\/:id\"<\/span>,<\/span> hello<\/span> _<\/span>),<\/span> \/\/ API\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u3092\u5b9a\u7fa9<\/span>\r\n      )<\/span>\r\n      .<\/span>withAutoAcl<\/span>(<\/span>true<\/span>)<\/span> \/\/ \u3053\u308c\u306f\u3064\u3051\u3068\u304b\u306a\u3044\u3068\u52d5\u304b\u306a\u3044\u3002<\/span>\r\n  }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u521b\u5efaServiceImpl<\/h2>\n
\"image.png\"<\/div>\n
\u6240\u4ee5\uff0c\u6211\u7684StudyLagomServiceImpl.scala<\/p>\n
package<\/span> com.example.mystudylagom.impl<\/span>\r\n\r\nimport<\/span> akka.NotUsed<\/span>\r\nimport<\/span> com.example.mystudylagom.api.MyStudyLagomService<\/span>\r\nimport<\/span> com.lightbend.lagom.scaladsl.api.ServiceCall<\/span>\r\n\r\nimport<\/span> scala.concurrent.Future<\/span>\r\n\r\nclass<\/span> MyStudyLagomServiceImpl<\/span>()<\/span> extends<\/span> MyStudyLagomService<\/span> {<\/span>\r\n  \/\/ api\u306e\u5b9f\u88c5\u306e\u4e2d\u8eab\u3002\u300c_ =>\u300d\u306e_\u306b\u306fpost\u306e\u5834\u5408\u3001request body\u304c\u5165\u3063\u3066\u304f\u308b\u307f\u305f\u3044\u3002<\/span>\r\n  override<\/span> def<\/span> hello<\/span>(<\/span>id<\/span>:<\/span> String<\/span>)<\/span>:<\/span> ServiceCall<\/span>[<\/span>NotUsed<\/span>, String<\/span>]<\/span> =<\/span> ServiceCall<\/span> {<\/span> _<\/span> =><\/span>\r\n    \/\/ \u306a\u3093\u3067\u3082\u304b\u3093\u3067\u3082Future\u3067\u8fd4\u305b\u3070OK\u3063\u307d\u3044\uff1f<\/span>\r\n    Future<\/span>.<\/span>successful<\/span>(<\/span>\"test\"<\/span>)<\/span>\r\n  }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u5982\u679c\u7528\u8fd9\u4e2a\u542f\u52a8\uff0c\u770b\u8d77\u6765\u4f1a\u52a8\uff0c\u4f46\u4f1a\u51fa\u73b0\u9519\u8bef\u3002\u6839\u636e\u7b80\u77ed\u8c03\u67e5\uff0c\u4f3c\u4e4e\u9700\u8981\u4e00\u4e2a\u7528\u4e8e\u8fdb\u884cDI\u7684Loader\u3002
\n\u53ef\u4ee5\u6309\u4ee5\u4e0b\u65b9\u5f0f\u5b9e\u65bd\u3002<\/p>\n
package<\/span> com.example.mystudylagom.impl<\/span>\r\n\r\nimport<\/span> com.example.mystudylagom.api.MyStudyLagomService<\/span>\r\nimport<\/span> com.lightbend.lagom.scaladsl.api.ServiceLocator<\/span>\r\nimport<\/span> com.lightbend.lagom.scaladsl.api.ServiceLocator.NoServiceLocator<\/span>\r\nimport<\/span> com.lightbend.lagom.scaladsl.server._<\/span>\r\nimport<\/span> com.lightbend.lagom.scaladsl.devmode.LagomDevModeComponents<\/span>\r\nimport<\/span> play.api.libs.ws.ahc.AhcWSComponents<\/span>\r\nimport<\/span> com.softwaremill.macwire._<\/span>\r\n\r\n\/*\r\n * \u3053\u308c\u306fDI\u306e\u4ed5\u7d44\u307f\u3092\u884c\u3046\u305f\u3081\u306b\u5fc5\u8981\uff1f\r\n * \u3053\u306efile\u3092\u4f5c\u3089\u306a\u3044\u3068\u52d5\u304b\u306a\u3044\r\n * \u3068\u308a\u3042\u3048\u305a\u3001\u3044\u3089\u306a\u3044\u3082\u306e\u3092\u524a\u304e\u843d\u3068\u3057\u3066\u3001\u6700\u4f4e\u9650\u52d5\u304f\u3088\u3046\u306b\u3057\u305f\u3082\u306e\r\n * akka\u3068\u304bcassandra\u306e\u8aad\u307f\u8fbc\u307f\u3082\u3053\u3053\u3067\u884c\u3046\u3088\u3046\u306a\u306e\u3067\u3001\u307e\u305f\u5225\u306e\u6a5f\u4f1a\u3067\u307b\u305d\u307c\u305d\u8a66\u3059\u3002\r\n *\/<\/span>\r\nclass<\/span> MyStudyLagomLoader<\/span> extends<\/span> LagomApplicationLoader<\/span> {<\/span>\r\n\r\n  \/\/ load\u3068loadDevMode\u3067\u3001\u304a\u305d\u3089\u304f\u3001\u672c\u756a\u30fb\u958b\u767a\u74b0\u5883\u3067\u4f7f\u3046\u4f9d\u5b58\u3092\u7ba1\u7406\u3059\u308b\u611f\u3058\u304b\u306a\uff1f<\/span>\r\n  override<\/span> def<\/span> load<\/span>(<\/span>context<\/span>:<\/span> LagomApplicationContext<\/span>)<\/span>:<\/span> LagomApplication<\/span> =<\/span>\r\n    new<\/span> MyStudyLagomApplication<\/span>(<\/span>context<\/span>)<\/span> {<\/span>\r\n      override<\/span> def<\/span> serviceLocator<\/span>:<\/span> ServiceLocator<\/span> =<\/span> NoServiceLocator<\/span>\r\n    }<\/span>\r\n\r\n  \/\/ \u3053\u306e\u30e1\u30bd\u30c3\u30c9\u3001\u6d88\u3057\u3066\u3082\u52d5\u304f\uff1f\u3068\u601d\u3063\u3066\u6d88\u3057\u3066\u307f\u305f\u3089\u30a8\u30e9\u30fc\u51fa\u305f\u3002<\/span>\r\n  override<\/span> def<\/span> loadDevMode<\/span>(<\/span>context<\/span>:<\/span> LagomApplicationContext<\/span>)<\/span>:<\/span> LagomApplication<\/span> =<\/span>\r\n    new<\/span> MyStudyLagomApplication<\/span>(<\/span>context<\/span>)<\/span> with<\/span> LagomDevModeComponents<\/span>\r\n}<\/span>\r\n\r\nabstract<\/span> class<\/span> MyStudyLagomApplication<\/span>(<\/span>context<\/span>:<\/span> LagomApplicationContext<\/span>)<\/span>\r\n  extends<\/span> LagomApplication<\/span>(<\/span>context<\/span>)<\/span>\r\n    with<\/span> AhcWSComponents<\/span> {<\/span>\r\n\r\n  \/\/ \u3053\u3093\u306a\u611f\u3058\u3067\u30d0\u30a4\u30f3\u30c9\u3059\u308b\u307f\u305f\u3044<\/span>\r\n  override<\/span> lazy<\/span> val<\/span> lagomServer<\/span>:<\/span> LagomServer<\/span> =<\/span> serverFor<\/span>[<\/span>MyStudyLagomService<\/span>](<\/span>wire<\/span>[<\/span>MyStudyLagomServiceImpl<\/span>])<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u6240\u4ee5\uff0c\u5c06\u8fd9\u4e2aLoader\u5728\u914d\u7f6e\u6587\u4ef6\u4e2d\u6307\u5b9a\u51fa\u6765\u3002<\/p>\n
# Loader\u306e\u8aad\u307f\u8fbc\u307f\u3067\u3053\u306e\u4e00\u884c\u306f\u5fc5\u8981\r\n<\/span>play<\/span>.application<\/span>.loader<\/span> = com<\/span>.example<\/span>.mystudylagom<\/span>.impl<\/span>.MyStudyLagomLoader<\/span>\r\n<\/code><\/pre>\n
\u542f\u52a8<\/h1>\n
\u5982\u679c\u80fd\u505a\u5230\u8fd9\u4e00\u70b9\uff0c\u5c31\u8bd5\u7740\u542f\u52a8\u5b83\u3002\u4f7f\u7528curl\u5411\u521b\u5efa\u7684API\u53d1\u9001\u8bf7\u6c42\u3002<\/p>\n
gakumbp:study-lagom gaku$ curl http:\/\/localhost:9000\/api\/hello2\/Alice\r\ntest\r\n<\/code><\/pre>\n
\u6709\u4ec0\u4e48\u4e1c\u897f\u56de\u6765\u4e86\uff01\u7136\u540e\uff0c\u5f53\u5411study-lagom\u670d\u52a1\u7684API\u53d1\u9001curl\u8bf7\u6c42\u65f6<\/p>\n
gakumbp:study-lagom gaku$ curl http:\/\/localhost:9000\/api\/hello\/Alice\r\nHello, Alice!\r\n<\/code><\/pre>\n
\u8fd9\u8fb9\u4e5f\u4f1a\u6709\u4e00\u4e9b\u56de\u5e94?<\/p>\n
\u7ed3\u675f<\/h1>\n
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