我刚接触喷雾，我无法让它上班......：/
我的build.sbt：
val apacheDeps = Seq(
"commons-validator" % "commons-validator" % "1.4.1"
)
val sprayAndAkkaDeps = {
val sprayV = "1.3.3"
Seq(
"io.spray" %% "spray-can" % sprayV,
"io.spray" %% "spray-routing" % sprayV,
"io.spray" %% "spray-testkit" % sprayV % "test",
"com.typesafe.akka" %% "akka-actor" % "2.3.9"
)
}
name := "myApp"
version := "1.0.0"
scalaVersion := "2.11.6"
libraryDependencies ++= Seq(
"org.mongodb" %% "casbah" % "2.8.1",
"ch.qos.logback" % "logback-classic" % "1.1.2",
"org.scala-lang.modules" %% "scala-xml" % "1.0.3",
"com.typesafe.play" %% "play-json" % "2.4.0",
"org.specs2" %% "specs2-core" % "3.6.1" % "test",
"com.netaporter" %% "scala-uri" % "0.4.7"
) ++ apacheDeps ++ sprayAndAkkaDeps
Revolver.settings
我的主要目标：
import akka.actor._
import akka.io.IO
import akka.pattern.ask
import spray.can.Http
import akka.util.Timeout
import scala.concurrent.duration._
object Main extends App {
implicit val timeout = new Timeout(5.seconds)
implicit val system = ActorSystem("acontextGen")
val listener = system.actorOf(Props[listeners.MyHttpListener], "httpListener")
IO(Http) ? Http.Bind(listener, interface = "localhost", port = 7777)
}
我的听众：
package listeners
import spray.routing._
class MyHttpListener extends HttpServiceActor {
def receive = runRoute {
path("hi") {
get {
complete("hello")
}
}
}
}
问题。当我运行时，我得到这个输出，服务器没有启动7777端口
> gen[ERROR] Uncaught error from thread [acontextGen-akka.actor.default-dispatcher-2] shutting down JVM since 'akka.jvm-exit-on-fatal-error' is enabled for ActorSystem[acontextGen]
gen[ERROR] java.lang.NoClassDefFoundError: shapeless/PrependAux$
gen[ERROR] at spray.routing.directives.PathDirectives$class.pathPrefix(PathDirectives.scala:40)
gen[ERROR] at spray.routing.HttpServiceActor.pathPrefix(HttpService.scala:96)
gen[ERROR] at spray.routing.directives.PathDirectives$class.path(PathDirectives.scala:33)
gen[ERROR] at spray.routing.HttpServiceActor.path(HttpService.scala:96)
gen[ERROR] at listeners.MyHttpListener.receive(MyHttpListener.scala:9)
gen[ERROR] at akka.actor.ActorCell.newActor(ActorCell.scala:558)
gen[ERROR] at akka.actor.ActorCell.create(ActorCell.scala:578)
gen[ERROR] at akka.actor.ActorCell.invokeAll$1(ActorCell.scala:456)
gen[ERROR] at akka.actor.ActorCell.systemInvoke(ActorCell.scala:478)
gen[ERROR] at akka.dispatch.Mailbox.processAllSystemMessages(Mailbox.scala:279)
gen [ERROR] [06/19/2015 18:41:00.089] [acontextGen-akka.actor.default-dispatcher-2] [ActorSystem(acontextGen)] Uncaught error from thread [acontextGen-akka.actor.default-dispatcher-2] shutting down JVM since 'akka.jvm-exit-on-fatal-error' is enabled
gen java.lang.NoClassDefFoundError: shapeless/PrependAux$
gen at spray.routing.directives.PathDirectives$class.pathPrefix(PathDirectives.scala:40)
gen at spray.routing.HttpServiceActor.pathPrefix(HttpService.scala:96)
gen at spray.routing.directives.PathDirectives$class.path(PathDirectives.scala:33)
gen at spray.routing.HttpServiceActor.path(HttpService.scala:96)
gen at listeners.MyHttpListener.receive(MyHttpListener.scala:9)
gen at akka.actor.ActorCell.newActor(ActorCell.scala:558)
gen at akka.actor.ActorCell.create(ActorCell.scala:578)
gen at akka.actor.ActorCell.invokeAll$1(ActorCell.scala:456)
gen at akka.actor.ActorCell.systemInvoke(ActorCell.scala:478)
gen at akka.dispatch.Mailbox.processAllSystemMessages(Mailbox.scala:279)
gen at akka.dispatch.Mailbox.run(Mailbox.scala:220)
gen at akka.dispatch.Mailbox.exec(Mailbox.scala:231)
gen at scala.concurrent.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260)
gen at scala.concurrent.forkjoin.ForkJoinPool$WorkQueue.pollAndExecAll(ForkJoinPool.java:1253)
gen at scala.concurrent.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1346)
gen at scala.concurrent.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979)
gen at scala.concurrent.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107)
gen Caused by: java.lang.ClassNotFoundException: shapeless.PrependAux$
gen at java.net.URLClassLoader$1.run(URLClassLoader.java:372)
gen at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
gen at java.security.AccessController.doPrivileged(Native Method)
gen at java.net.URLClassLoader.findClass(URLClassLoader.java:360)
gen at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
gen at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
gen ... 17 more
gen
gen[ERROR] at akka.dispatch.Mailbox.run(Mailbox.scala:220)
gen[ERROR] at akka.dispatch.Mailbox.exec(Mailbox.scala:231)
gen[ERROR] at scala.concurrent.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260)
gen[ERROR] at scala.concurrent.forkjoin.ForkJoinPool$WorkQueue.pollAndExecAll(ForkJoinPool.java:1253)
gen[ERROR] at scala.concurrent.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1346)
gen[ERROR] at scala.concurrent.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979)
gen[ERROR] at scala.concurrent.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107)
gen[ERROR] Caused by: java.lang.ClassNotFoundException: shapeless.PrependAux$
gen[ERROR] at java.net.URLClassLoader$1.run(URLClassLoader.java:372)
gen[ERROR] at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
gen[ERROR] at java.security.AccessController.doPrivileged(Native Method)
gen[ERROR] at java.net.URLClassLoader.findClass(URLClassLoader.java:360)
gen[ERROR] at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
gen[ERROR] at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
gen[ERROR] ... 17 more
gen ... finished with exit code 255
你能解释一下我做错了什么吗？ 我已经遵循了这个例子：https://github.com/spray/spray-template/tree/on_spray-can_1.3虽然可以使用
> show externalDependencyClasspath
[info] List(Attributed(/home/user256/.ivy2/cache/org.scala-lang/scala-library/jars/scala-library-2.11.6.jar), Attributed(/home/user256/.ivy2/cache/org.mongodb/casbah-commons_2.11/jars/casbah-commons_2.11-2.8.1.jar), Attributed(/home/user256/.ivy2/cache/com.github.nscala-time/nscala-time_2.11/jars/nscala-time_2.11-1.0.0.jar), Attributed(/home/user256/.ivy2/cache/org.mongodb/mongo-java-driver/jars/mongo-java-driver-2.13.1.jar), Attributed(/home/user256/.ivy2/cache/org.mongodb/casbah-core_2.11/jars/casbah-core_2.11-2.8.1.jar), Attributed(/home/user256/.ivy2/cache/org.mongodb/casbah-query_2.11/jars/casbah-query_2.11-2.8.1.jar), Attributed(/home/user256/.ivy2/cache/org.mongodb/casbah-gridfs_2.11/jars/casbah-gridfs_2.11-2.8.1.jar), Attributed(/home/user256/.ivy2/cache/ch.qos.logback/logback-classic/jars/logback-classic-1.1.2.jar), Attributed(/home/user256/.ivy2/cache/ch.qos.logback/logback-core/jars/logback-core-1.1.2.jar), Attributed(/home/user256/.ivy2/cache/org.slf4j/slf4j-api/jars/slf4j-api-1.7.6.jar), Attributed(/home/user256/.ivy2/cache/org.scala-lang.modules/scala-xml_2.11/bundles/scala-xml_2.11-1.0.3.jar), Attributed(/home/user256/.ivy2/cache/com.typesafe.play/play-json_2.11/jars/play-json_2.11-2.4.0.jar), Attributed(/home/user256/.ivy2/cache/com.typesafe.play/play-iteratees_2.11/jars/play-iteratees_2.11-2.4.0.jar), Attributed(/home/user256/.ivy2/cache/org.scala-stm/scala-stm_2.11/jars/scala-stm_2.11-0.7.jar), Attributed(/home/user256/.ivy2/cache/com.typesafe/config/bundles/config-1.3.0.jar), Attributed(/home/user256/.ivy2/cache/com.typesafe.play/play-functional_2.11/jars/play-functional_2.11-2.4.0.jar), Attributed(/home/user256/.ivy2/cache/com.typesafe.play/play-datacommons_2.11/jars/play-datacommons_2.11-2.4.0.jar), Attributed(/home/user256/.ivy2/cache/joda-time/joda-time/jars/joda-time-2.7.jar), Attributed(/home/user256/.ivy2/cache/org.joda/joda-convert/jars/joda-convert-1.7.jar), Attributed(/home/user256/.ivy2/cache/org.scala-lang/scala-reflect/jars/scala-reflect-2.11.6.jar), Attributed(/home/user256/.ivy2/cache/com.fasterxml.jackson.core/jackson-core/bundles/jackson-core-2.5.3.jar), Attributed(/home/user256/.ivy2/cache/com.fasterxml.jackson.core/jackson-annotations/bundles/jackson-annotations-2.5.3.jar), Attributed(/home/user256/.ivy2/cache/com.fasterxml.jackson.core/jackson-databind/bundles/jackson-databind-2.5.3.jar), Attributed(/home/user256/.ivy2/cache/com.fasterxml.jackson.datatype/jackson-datatype-jdk8/bundles/jackson-datatype-jdk8-2.5.3.jar), Attributed(/home/user256/.ivy2/cache/com.fasterxml.jackson.datatype/jackson-datatype-jsr310/bundles/jackson-datatype-jsr310-2.5.3.jar), Attributed(/home/user256/.ivy2/cache/com.netaporter/scala-uri_2.11/jars/scala-uri_2.11-0.4.7.jar), Attributed(/home/user256/.ivy2/cache/org.parboiled/parboiled_2.11/jars/parboiled_2.11-2.0.1.jar), Attributed(/home/user256/.ivy2/cache/commons-validator/commons-validator/jars/commons-validator-1.4.1.jar), Attributed(/home/user256/.ivy2/cache/commons-beanutils/commons-beanutils/jars/commons-beanutils-1.8.3.jar), Attributed(/home/user256/.ivy2/cache/commons-logging/commons-logging/jars/commons-logging-1.2.jar), Attributed(/home/user256/.ivy2/cache/commons-digester/commons-digester/jars/commons-digester-1.8.1.jar), Attributed(/home/user256/.ivy2/cache/commons-collections/commons-collections/jars/commons-collections-3.2.1.jar), Attributed(/home/user256/.ivy2/cache/io.spray/spray-can_2.11/bundles/spray-can_2.11-1.3.3.jar), Attributed(/home/user256/.ivy2/cache/io.spray/spray-io_2.11/bundles/spray-io_2.11-1.3.3.jar), Attributed(/home/user256/.ivy2/cache/io.spray/spray-util_2.11/bundles/spray-util_2.11-1.3.3.jar), Attributed(/home/user256/.ivy2/cache/io.spray/spray-http_2.11/bundles/spray-http_2.11-1.3.3.jar), Attributed(/home/user256/.ivy2/cache/org.parboiled/parboiled-scala_2.11/jars/parboiled-scala_2.11-1.1.7.jar), Attributed(/home/user256/.ivy2/cache/org.parboiled/parboiled-core/jars/parboiled-core-1.1.7.jar), Attributed(/home/user256/.ivy2/cache/io.spray/spray-routing-shapeless2_2.11/bundles/spray-routing-shapeless2_2.11-1.3.3.jar), Attributed(/home/user256/.ivy2/cache/io.spray/spray-httpx_2.11/bundles/spray-httpx_2.11-1.3.3.jar), Attributed(/home/user256/.ivy2/cache/org.jvnet.mimepull/mimepull/jars/mimepull-1.9.5.jar), Attributed(/home/user256/.ivy2/cache/com.chuusai/shapeless_2.11/bundles/shapeless_2.11-2.1.0.jar), Attributed(/home/user256/.ivy2/cache/com.typesafe.akka/akka-actor_2.11/jars/akka-actor_2.11-2.3.9.jar))
答案 0 :(得分：6)
原因是无形的1.x和无形的2.x是不兼容的。但是，如果混合依赖于无形sbt的两个版本的依赖关系，依赖管理器默认只会逐出旧版本。这就是这里发生的事情：
> dependencyTree
myapp:myapp_2.11:1.0.0 [S]
+-com.netaporter:scala-uri_2.11:0.4.7 [S]
| +-org.parboiled:parboiled_2.11:2.0.1 [S]
| +-com.chuusai:shapeless_2.11:2.0.0 [S]
|
+-io.spray:spray-routing_2.11:1.3.3 [S]
| +-com.chuusai:shapeless_2.11:1.2.4 (evicted by: 2.0.0)
| +-io.spray:spray-http_2.11:1.3.3 [S]
| | +-io.spray:spray-util_2.11:1.3.3 [S]
| | +-org.parboiled:parboiled-scala_2.11:1.1.7 [S]
| | +-org.parboiled:parboiled-core:1.1.7
| | ...
spray-routing仍取决于shapeless 1.x而scala-uri依赖于parboiled2，而shapeless取决于spray-routing-shapeless2 2.x。
解决方案是使用专门构建的relationship()模块来帮助解决这类问题。