如何建立从游戏框架2.5.X

Question

罐子我尝试从清洁工程与sbt-assembly建立罐子如何在docs描述：

addSbtPlugin("com.eed3si9n" % "sbt-assembly" % "0.11.2") 

import AssemblyKeys._ 

assemblySettings 

mainClass in assembly := Some("play.core.server.ProdServerStart") 

fullClasspath in assembly += Attributed.blank(PlayKeys.playPackageAssets.value) 

，但它给了我很多重复数据删除的错误。如何用sbt-assembly打造“胖”罐？

Answer 1

需要设置几个位来构建一个播放应用程序作为一个胖罐子。

从asssembly插件开始。必须有一个名为assembly.sbt的文件直接位于项目目录中。为了确切并消除混淆，如果您的项目名为MyPlayProject，则该文件必须位于“MyPlayProject/project/assembly.sbt”中，并且应仅包含以下内容。

addSbtPlugin("com.eed3si9n" % "sbt-assembly" % "0.14.3" 

很明显，版本可能会改变，但它应该工作。这会将程序集插件添加到您的项目中，如果像其他插件一样添加到plugins.sbt文件中，它将不起作用。

作为一个涵盖所有基础的问题，还要确保你有标准的sbt项目，包括project/build.properties。请注意，对于玩2.5.X版本SBT 13.8或更高每https://www.playframework.com/documentation/2.5.x/Migration25#sbt-upgrade-to-0.13.11

sbt.version=0.13.11 

需要，造成您的问题可能的关键部分是build.sbt 文件，其中应该包括合并战略的一部分。在JAR文件中有许多标准文件（例如MANIFEST.MF等），当您将所有JAR文件合并到一个胖JAR文件中时，您必须执行一些操作来处理这些重复的文件。基本示例

assemblyMergeStrategy in assembly := { 
    case r if r.startsWith("reference.conf") => MergeStrategy.concat 
    case PathList("META-INF", m) if m.equalsIgnoreCase("MANIFEST.MF") => MergeStrategy.discard 
    case x => MergeStrategy.first 
} 

您的里程可能与特定情况下的处理方式很相似，但这对于标准的播放式胖罐而言非常基本。

上述合并策略的一些基本情况如下：

• 合并所有jar的reference.conf为脂肪JAR单个文件。我忘记了导致这个问题的具体问题，但我认为，如果没有这一步骤，您就无法将您的游戏应用作为胖罐子来运行。我没有证据）
• 放弃每个jar的MANIFEST.MF文件。许多在线的例子都显示为'case PathList（“META-INF”，xs @ _ *）=> MergeStrategy.discard'。这可以通过删除jar的META-INF目录中的任何东西来实现。然而，开始播放2.4依赖注入已被推到很难玩，如果使用依赖注入有一个库依赖net.sf.ehcache其中包括使用依赖注入所需的服务文件。修复是留下所有其他文件，只是丢弃MANIFEST.MF文件，具体如我所做的或只是删除一切，不要使用任何依赖注入（不推荐）
• 一般捕获所有情况下，保持第一任何重复的文件并丢弃其他文件。当你可能在同一个库上有多个公共依赖关系并且没有保存多个副本的理由时很有用。

由于我无法澄清与评论这里是一个完整的示例build.sbt文件。

name := """MyPlayProject""" 

version := "1.0" 

lazy val `root` = (project in file(".")).enablePlugins(PlayScala) 

scalaVersion := "2.11.8" 

// Set JS Engine to use 
JsEngineKeys.engineType := JsEngineKeys.EngineType.Node 

// Set repository details for resolving additional depenecies 
resolvers ++= Seq(
    "scalaz-bintray" at "https://dl.bintray.com/scalaz/releases", 
    "ClouderaRepo" at "https://repository.cloudera.com/content/repositories/releases" 
) 

// Specifies dependencies to use in project 
libraryDependencies ++= Seq(
    "org.apache.kafka" % "kafka_2.11" % "0.9.0.1", 
    jdbc, 
    cache, 
    ws, 
    specs2 % Test 
) 

// Add an additional source content route besides the default 
unmanagedResourceDirectories in Test <+= baseDirectory (_ /"target/web/public/test") 

unmanagedSourceDirectories in Compile += baseDirectory.value/"src2"/"main"/"scala" 

sourceDirectory in Compile <<= baseDirectory/"src2/main/scala" 

scalaSource in Compile <<= baseDirectory/"src2/main/scala" 

// Informs SBT Assembly how to handle duplicated files when combining project and dependency jars into a single fat jar 
assemblyMergeStrategy in assembly := { 
    case n if n.startsWith("reference.conf") => MergeStrategy.concat 
    case PathList("META-INF", xs @ _*) => MergeStrategy.discard 
    case x => MergeStrategy.first 
} 

我会留下更多细节意见回答，所以我本来可以更精确地对我的回答，但问题是有点老了，并且说我的声望不够高反正之前...希望这有助于。

P.S.我在寻找帮助时遇到了自己的合并问题，将play 2.3.4迁移到2.5.4。这就是为什么我将META-INF合并策略更改为仅丢弃MANIFEST.MF，否则会导致以下异常。我将其与我的答案一起重新发布，希望它可能会在搜索结果中找到，因为我最初在搜索时发现它很少。

Oops, cannot start the server. 
com.google.inject.CreationException: Unable to create injector, see the following errors: 

1) Error in custom provider, net.sf.ehcache.CacheException: java.lang.AssertionError: No net.sf.ehcache.EhcacheInit services found 
    while locating play.api.cache.CacheManagerProvider 
    while locating net.sf.ehcache.CacheManager 
    for field at play.api.cache.NamedEhCacheProvider.manager(Cache.scala:211) 
    while locating play.api.cache.NamedEhCacheProvider 
    at com.google.inject.util.Providers$GuicifiedProviderWithDependencies.initialize(Providers.java:149) 
    at play.api.cache.EhCacheModule.play$api$cache$EhCacheModule$$bindCache$1(Cache.scala:184): 
Binding(interface net.sf.ehcache.Ehcache qualified with QualifierInstance(@play.cache.NamedCache(value=play)) to ProviderTarget(play.api.cache.NamedEhCacheProvider@45312be2)) (via modules: com.google.inject.util.Modules$OverrideModule -> play.api.inject.guice.GuiceableModuleConversions$$anon$1) 

1 error 
    at com.google.inject.internal.Errors.throwCreationExceptionIfErrorsExist(Errors.java:466) 
    at com.google.inject.internal.InternalInjectorCreator.injectDynamically(InternalInjectorCreator.java:176) 
    at com.google.inject.internal.InternalInjectorCreator.build(InternalInjectorCreator.java:110) 
    at com.google.inject.Guice.createInjector(Guice.java:96) 
    at com.google.inject.Guice.createInjector(Guice.java:84) 
    at play.api.inject.guice.GuiceBuilder.injector(GuiceInjectorBuilder.scala:181) 
    at play.api.inject.guice.GuiceApplicationBuilder.build(GuiceApplicationBuilder.scala:123) 
    at play.api.inject.guice.GuiceApplicationLoader.load(GuiceApplicationLoader.scala:21) 
    at play.core.server.ProdServerStart$.start(ProdServerStart.scala:47) 
    at play.core.server.ProdServerStart$.main(ProdServerStart.scala:22) 
    at play.core.server.ProdServerStart.main(ProdServerStart.scala) 
Caused by: net.sf.ehcache.CacheException: java.lang.AssertionError: No net.sf.ehcache.EhcacheInit services found 
    at net.sf.ehcache.LibraryInit.init(LibraryInit.java:55) 
    at net.sf.ehcache.CacheManager.init(CacheManager.java:366) 
    at net.sf.ehcache.CacheManager.<init>(CacheManager.java:259) 
    at net.sf.ehcache.CacheManager.newInstance(CacheManager.java:1037) 
    at net.sf.ehcache.CacheManager.newInstance(CacheManager.java:936) 
    at net.sf.ehcache.CacheManager.create(CacheManager.java:904) 
    at play.api.cache.CacheManagerProvider.get$lzycompute(Cache.scala:205) 
    at play.api.cache.CacheManagerProvider.get(Cache.scala:202) 
    at play.api.cache.CacheManagerProvider.get(Cache.scala:201) 
    at com.google.inject.internal.ProviderInternalFactory.provision(ProviderInternalFactory.java:81) 
    at com.google.inject.internal.BoundProviderFactory.provision(BoundProviderFactory.java:72) 
    at com.google.inject.internal.ProviderInternalFactory.circularGet(ProviderInternalFactory.java:61) 
    at com.google.inject.internal.BoundProviderFactory.get(BoundProviderFactory.java:62) 
    at com.google.inject.internal.SingleFieldInjector.inject(SingleFieldInjector.java:54) 
    at com.google.inject.internal.MembersInjectorImpl.injectMembers(MembersInjectorImpl.java:132) 
    at com.google.inject.internal.MembersInjectorImpl$1.call(MembersInjectorImpl.java:93) 
    at com.google.inject.internal.MembersInjectorImpl$1.call(MembersInjectorImpl.java:80) 
    at com.google.inject.internal.InjectorImpl.callInContext(InjectorImpl.java:1103) 
    at com.google.inject.internal.MembersInjectorImpl.injectAndNotify(MembersInjectorImpl.java:80) 
    at com.google.inject.internal.MembersInjectorImpl.injectMembers(MembersInjectorImpl.java:62) 
    at com.google.inject.internal.InjectorImpl.injectMembers(InjectorImpl.java:984) 
    at com.google.inject.util.Providers$GuicifiedProviderWithDependencies.initialize(Providers.java:149) 
    at com.google.inject.util.Providers$GuicifiedProviderWithDependencies$$FastClassByGuice$$2a7177aa.invoke(<generated>) 
    at com.google.inject.internal.cglib.reflect.$FastMethod.invoke(FastMethod.java:53) 
    at com.google.inject.internal.SingleMethodInjector$1.invoke(SingleMethodInjector.java:57) 
    at com.google.inject.internal.SingleMethodInjector.inject(SingleMethodInjector.java:91) 
    at com.google.inject.internal.MembersInjectorImpl.injectMembers(MembersInjectorImpl.java:132) 
    at com.google.inject.internal.MembersInjectorImpl$1.call(MembersInjectorImpl.java:93) 
    at com.google.inject.internal.MembersInjectorImpl$1.call(MembersInjectorImpl.java:80) 
    at com.google.inject.internal.InjectorImpl.callInContext(InjectorImpl.java:1092) 
    at com.google.inject.internal.MembersInjectorImpl.injectAndNotify(MembersInjectorImpl.java:80) 
    at com.google.inject.internal.Initializer$InjectableReference.get(Initializer.java:174) 
    at com.google.inject.internal.Initializer.injectAll(Initializer.java:108) 
    at com.google.inject.internal.InternalInjectorCreator.injectDynamically(InternalInjectorCreator.java:174) 
    ... 9 more 
Caused by: java.lang.AssertionError: No net.sf.ehcache.EhcacheInit services found 
    at net.sf.ehcache.LibraryInit.initService(LibraryInit.java:78) 
    at net.sf.ehcache.LibraryInit.init(LibraryInit.java:50) 
    ... 42 more