SBT+spring-boot: “在 META-INF/spring.factories 中找不到自动配置类”

huangapple
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英文:

SBT+spring-boot: " No auto configuration classes found in META-INF/spring.factories"

问题

我有一个用Scala编写的Spring Boot应用程序。我正在使用SBT来构建项目。我已经使用"sbt-assembly"生成了一个包含所有必需依赖项的大而全的JAR文件。

sbt版本 = 1.3.5
scala版本 := "2.13.1"

以下是我的build.sbt文件

  1. import BuildUtils.readVersion
  3. 名称 := "DiscoveryEngine"
  4. 版本 := "0.1"
  5. scala版本 := "2.13.1"
  6. 组织 := "com.javasree.scala.discoveryengine"
  7. 发布Maven风格 := true
  9. 懒惰的val artifactoryRepo = settingKey[sbt.librarymanagement.Resolver]("Artifactory repository value")
  11. isSnapshot := {
  12.   sys.props.getOrElse("DISCOVERY_ENGINE_SNAPSHOT", sys.env.getOrElse("DISCOVERY_ENGINE_SNAPSHOT", "true")) match {
  13.     case "true" | "1" => true
  14.     case "false" | "0" => false
  15.     case _ => println("将默认值设置为true为'SNAPSHOT'")
  16.       true
  17.   }
  18. }
  20. 在(Compile, packageDoc)中发布Artifact := false
  21. 在(Compile, packageSrc)中发布Artifact := false
  23. /*
  24. 如果环境变量(DISCOVERY_ENGINE_SNAPSHOT)设置为true，则构建将执行“快照”
  25. 否则将是“发布”
  26. * */
  27. 版本 := {
  28.   readVersion("app-build")+
  29.     (isSnapshot.value match {
  30.       case true => "-SNAPSHOT"
  31.       case false => ""
  32.     })
  33. }
  35. artifactoryRepo := {
  36.   val repoURL = "http://localhost:8081/artifactory"
  37.   (isSnapshot.value match {
  38.     case true => "jfrog-snapshot" at s"${repoURL}/javasree-sbt-snapshot;build.timestamp=" + new java.util.Date().getTime
  39.     case false => "jfrog-remote" at s"${repoURL}/javasree-sbt-local"
  40.   })
  41. }
  43. publishTo := Some( artifactoryRepo.value )
  44. credentials += Credentials("Artifactory Realm", "localhost", "admin", "password")
  46. 在assembly中的assemblyMergeStrategy := {
  47.   case PathList("META-INF", xs @ _*) => MergeStrategy.discard
  48.   case x => MergeStrategy.last
  49. }
  51. libraryDependencies ++= Seq(
  52.     "com.google.code.gson" % "gson" % "2.8.2" % "provided"
  53.   )++Dependencies.springDependencies

我对Scala和SBT还不太熟悉。其中一些代码是我通过谷歌搜索盲目添加的，只是为了确保我的构建能够正常工作。其中一个这样的代码是assembly mergestrategy。

当我遇到“重复项查找错误”时，我尝试了不同的mergeStrategy代码。经过多次尝试，我最终成功生成了大而全的JAR文件。最初，我的大而全的JAR文件并没有成功运行，因为它又出现了不同的“无法加载主类”的错误。

上述的构建脚本是我最终生成大而全的JAR文件的脚本，我能够运行这个JAR文件。这次它没有给我“无法加载主类”的错误，而是给了我一个新的错误，如下所示。

  1. $ java -jar DiscoveryEngine-assembly-1.0-SNAPSHOT.jar
  2. 00:44:54.232 [main] DEBUG org.springframework.web.context.support.StandardServletEnvironment - Activating profiles []
  4.   .   ____          _            __ _ _
  5.  /\\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \
  6. ( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
  7.  \\/  ___)| |_)| | | | | || (_| |  ) ) ) )
  8.   '  |____| .__|_| |_|_| |_\__, | / / / /
  9.  =========|_|==============|___/=/_/_/_/
  10.  :: Spring Boot ::         (v1.0-SNAPSHOT)
  12. 00:44:54.323 [main] INFO scala.App - Starting App v1.0-SNAPSHOT on LAPTOP-U3JTGOFA with PID 5648 (H:\Projects\Scala\DiscoryEngine\target\scala-2.13\DiscoveryEngine-assembly-1.0-SNAPSHOT.jar started by sree in H:\Projects\Scala\DiscoryEngine\target\scala-2.13)
  13. 00:44:54.324 [main] DEBUG scala.App - Running with Spring Boot v1.0-SNAPSHOT, Spring v1.0-SNAPSHOT
  14. 00:44:54.324 [main] INFO scala.App - No active profile set, falling back to default profiles: default
  15. ...

我确信这与我的sbt-assembly插件和我的MergeStrategy有关，但是在Stack Overflow的其他线程中没有一个解决方案能够解决我的问题，我别无选择，只能向Stack Overflow的专家们寻求帮助，希望能够得到正确的答案。提前感谢您的帮助。

英文:

I have a spring boot application written in Scala. I am using SBT to build the project. I have used "sbt-assembly" to generate the big fat jar with all the required dependencies added as one.

sbt.version = 1.3.5
scalaVersion := "2.13.1"

below is my build.sbt file

  1. import BuildUtils.readVersion
  3. name := "DiscoveryEngine"
  4. version := "0.1"
  5. scalaVersion := "2.13.1"
  6. organization := "com.javasree.scala.discoveryengine"
  7. publishMavenStyle := true
  9. lazy val artifactoryRepo = settingKey[sbt.librarymanagement.Resolver]("Artifactory repository value")
  11. isSnapshot := {
  12.   sys.props.getOrElse("DISCOVERY_ENGINE_SNAPSHOT", sys.env.getOrElse("DISCOVERY_ENGINE_SNAPSHOT", "true")) match {
  13.     case "true" | "1" => true
  14.     case "false" | "0" => false
  15.     case _ => println("taking the default value as true for 'SNAPSHOT'")
  16.       true
  17.   }
  18. }
  20. publishArtifact in (Compile, packageDoc) := false
  21. publishArtifact in (Compile, packageSrc) := false
  23. /*
  24. if env variable(DISCOVERY_ENGINE_SNAPSHOT) is set to true then build will do "snapshot"
  25. or else it will be "release"
  26. * */
  27. version := {
  28.   readVersion("app-build")+
  29.     (isSnapshot.value match {
  30.       case true => "-SNAPSHOT"
  31.       case false => ""
  32.     })
  33. }
  35. artifactoryRepo := {
  36.   val repoURL = "http://localhost:8081/artifactory"
  37.   (isSnapshot.value match {
  38.     case true => "jfrog-snapshot" at s"${repoURL}/javasree-sbt-snapshot;build.timestamp=" + new java.util.Date().getTime
  39.     case false => "jfrog-remote" at s"${repoURL}/javasree-sbt-local"
  40.   })
  41. }
  43. publishTo := Some( artifactoryRepo.value )
  44. credentials += Credentials("Artifactory Realm", "localhost", "admin", "password")
  46. assemblyMergeStrategy in assembly := {
  47.   case PathList("META-INF", xs @ _*) => MergeStrategy.discard
  48.   case x => MergeStrategy.last
  49. }
  51.   libraryDependencies ++= Seq(
  52.     "com.google.code.gson" % "gson" % "2.8.2" % "provided"
  53.   )++Dependencies.springDependencies

I am new to scala and sbt. some of the stuff were added blindly as a result of google search. just to make sure my build works. One such code is the assembly mergestrategy.

I have used different mergeStrategy code when i faced "deduplication found error". after several trail and error method i finally was able generate the fat jar. Initially my fat jar did not ran successfully as it failed again with a different error "failed to load main ....".
The above build script is my final script that is generating the fat jar and i was able to run the jar. This time it is not giving "failed to load main..." error but instead giving me new different error as below.

  1. $ java -jar DiscoveryEngine-assembly-1.0-SNAPSHOT.jar
  2. 00:44:54.232 [main] DEBUG org.springframework.web.context.support.StandardServletEnvironment - Activating profiles []
  4.   .   ____          _            __ _ _
  5.  /\\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \
  6. ( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
  7.  \\/  ___)| |_)| | | | | || (_| |  ) ) ) )
  8.   '  |____| .__|_| |_|_| |_\__, | / / / /
  9.  =========|_|==============|___/=/_/_/_/
  10.  :: Spring Boot ::         (v1.0-SNAPSHOT)
  12. 00:44:54.323 [main] INFO scala.App - Starting App v1.0-SNAPSHOT on LAPTOP-U3JTGOFA with PID 5648 (H:\Projects\Scala\DiscoryEngine\target\scala-2.13\DiscoveryEngine-assembly-1.0-SNAPSHOT.jar started by sree in H:\Projects\Scala\DiscoryEngine\target\scala-2.13)
  13. 00:44:54.324 [main] DEBUG scala.App - Running with Spring Boot v1.0-SNAPSHOT, Spring v1.0-SNAPSHOT
  14. 00:44:54.324 [main] INFO scala.App - No active profile set, falling back to default profiles: default
  15. 00:44:54.325 [main] DEBUG org.springframework.boot.SpringApplication - Loading source class com.javasree.scala.discoveryengine.DiscoveryEngine
  16. 00:44:54.367 [main] DEBUG org.springframework.boot.web.servlet.context.AnnotationConfigServletWebServerApplicationContext - Refreshing org.springframework.boot.web.servlet.context.AnnotationConfigServletWebServerApplicationContext@1445d7f
  17. 00:44:54.378 [main] DEBUG org.springframework.beans.factory.support.DefaultListableBeanFactory - Creating shared instance of singleton bean 'org.springframework.context.annotation.internalConfigurationAnnotationProcessor'
  18. 00:44:54.477 [main] ERROR org.springframework.boot.SpringApplication - Application run failed
  19. java.lang.IllegalArgumentException: No auto configuration classes found in META-INF/spring.factories. If you are using a custom packaging, make sure that file is correct.
  20. 	at org.springframework.util.Assert.notEmpty(Assert.java:464)
  21. 	at org.springframework.boot.autoconfigure.AutoConfigurationImportSelector.getCandidateConfigurations(AutoConfigurationImportSelector.java:173)
  22. 	at org.springframework.boot.autoconfigure.AutoConfigurationImportSelector.getAutoConfigurationEntry(AutoConfigurationImportSelector.java:116)
  23. 	at org.springframework.boot.autoconfigure.AutoConfigurationImportSelector$AutoConfigurationGroup.process(AutoConfigurationImportSelector.java:396)
  24. 	at org.springframework.context.annotation.ConfigurationClassParser$DeferredImportSelectorGrouping.getImports(ConfigurationClassParser.java:875)
  25. 	at org.springframework.context.annotation.ConfigurationClassParser$DeferredImportSelectorGroupingHandler.processGroupImports(ConfigurationClassParser.java:801)
  26. 	at org.springframework.context.annotation.ConfigurationClassParser$DeferredImportSelectorHandler.process(ConfigurationClassParser.java:771)
  27. 	at org.springframework.context.annotation.ConfigurationClassParser.parse(ConfigurationClassParser.java:185)
  28. 	at org.springframework.context.annotation.ConfigurationClassPostProcessor.processConfigBeanDefinitions(ConfigurationClassPostProcessor.java:315)
  29. 	at org.springframework.context.annotation.ConfigurationClassPostProcessor.postProcessBeanDefinitionRegistry(ConfigurationClassPostProcessor.java:232)
  30. 	at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanDefinitionRegistryPostProcessors(PostProcessorRegistrationDelegate.java:275)
  31. 	at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanFactoryPostProcessors(PostProcessorRegistrationDelegate.java:95)
  32. 	at org.springframework.context.support.AbstractApplicationContext.invokeBeanFactoryPostProcessors(AbstractApplicationContext.java:705)
  33. 	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:531)
  34. 	at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:141)
  35. 	at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:743)
  36. 	at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:390)
  37. 	at org.springframework.boot.SpringApplication.run(SpringApplication.java:312)
  38. 	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1214)
  39. 	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1203)
  40. 	at com.javasree.scala.discoveryengine.DiscoveryEngine$.delayedEndpoint$com$javasree$scala$discoveryengine$DiscoveryEngine$1(DiscoveryEngine.scala:13)
  41. 	at com.javasree.scala.discoveryengine.DiscoveryEngine$delayedInit$body.apply(DiscoveryEngine.scala:12)
  42. 	at scala.Function0.apply$mcV$sp(Function0.scala:39)
  43. 	at scala.Function0.apply$mcV$sp$(Function0.scala:39)
  44. 	at scala.runtime.AbstractFunction0.apply$mcV$sp(AbstractFunction0.scala:17)
  45. 	at scala.App.$anonfun$main$1(App.scala:73)
  46. 	at scala.App.$anonfun$main$1$adapted(App.scala:73)
  47. 	at scala.collection.IterableOnceOps.foreach(IterableOnce.scala:553)
  48. 	at scala.collection.IterableOnceOps.foreach$(IterableOnce.scala:551)
  49. 	at scala.collection.AbstractIterable.foreach(Iterable.scala:921)
  50. 	at scala.App.main(App.scala:73)
  51. 	at scala.App.main$(App.scala:71)
  52. 	at com.javasree.scala.discoveryengine.DiscoveryEngine$.main(DiscoveryEngine.scala:12)
  53. 	at com.javasree.scala.discoveryengine.DiscoveryEngine.main(DiscoveryEngine.scala)
  54. 00:44:54.479 [main] DEBUG org.springframework.boot.web.servlet.context.AnnotationConfigServletWebServerApplicationContext - Closing org.springframework.boot.web.servlet.context.AnnotationConfigServletWebServerApplicationContext@1445d7f, started on Tue May 05 00:44:54 IST 2020

I am sure it is some thing to do with my sbt-assembly plugin and with my MergeStrategy but non of the solutions in the other thread of SO solved my issue and i left with no other choice other than asking the experts in SO and cross my fingers to get the right answer. Thank you in advance.

答案1

得分: 2

None of the Merge strategy properly merge spring.factories files.

So here I did

I created an assembly JAR with Scala and without library dependencies

Sbt assembly

Then I used the sbt package native plugin to collect all of the dependency JARs in my my_lib folder

  1. Sbt universal:packageBin

And I executed the JAR with the following command

  1. java -classpath "my_lib/*;my jar" my.main
英文:

None of the Merge strategy properly merge spring.factories files.

So here I did

I created assembly jar with scala and without library dependencies

Sbt assembly

Then I use sbt package native plugin to get all of the dependency jar in my my_lib folder

  1. Sbt univarsal:packageBin

And I run the jar by command

  1. Java -classpath "my_lib/*;my jar" my.main

huangapple
  • 本文由 发表于 2020年5月5日 03:16:34
  • 转载请务必保留本文链接：https://go.coder-hub.com/61599894.html
  • java
  • sbt
  • sbt-assembly
  • scala
  • spring-boot
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