如何在scala主对象中使用幻影
我想用幻影来对付我的卡桑德拉 这是我学习如何使用phantom的示例(感谢Thiago) 我可以成功运行“SongTest” 但是我在运行如何在scala主对象中使用幻影,scala,cassandra,phantom-dsl,Scala,Cassandra,Phantom Dsl,我想用幻影来对付我的卡桑德拉 这是我学习如何使用phantom的示例(感谢Thiago) 我可以成功运行“SongTest” 但是我在运行数据库时遇到了一些麻烦。请在scala主对象中创建。 “scalatest”中的相同代码已成功运行。但在我的scala主对象中,它失败了。 这是我的源代码 package com.cassandra.phantom.modeling import com.cassandra.phantom.modeling.database._ import com.ca
数据库时遇到了一些麻烦。请在scala主对象中创建。
“scalatest”中的相同代码已成功运行。但在我的scala主对象中,它失败了。
这是我的源代码
package com.cassandra.phantom.modeling
import com.cassandra.phantom.modeling.database._
import com.cassandra.phantom.modeling.connector._
import scala.concurrent.ExecutionContext.Implicits.global
import scala.concurrent.duration._
/**
* Created by karamko on 2017. 3. 28..
*/
class TestCass extends EmbeddedDatabase with Connector.connector.Connector {
def create() {
database.create(5.seconds)
}
}
object Main extends App{
val test = new TestCass
test.create()
}
这是我的错误
Exception in thread "main" java.lang.NoClassDefFoundError: scala/reflect/runtime/package$
at com.outworkers.phantom.column.AbstractColumn$class.com$outworkers$phantom$column$AbstractColumn$$_name(AbstractColumn.scala:55)
at com.outworkers.phantom.column.Column.com$outworkers$phantom$column$AbstractColumn$$_name$lzycompute(Column.scala:24)
at com.outworkers.phantom.column.Column.com$outworkers$phantom$column$AbstractColumn$$_name(Column.scala:24)
at com.outworkers.phantom.column.AbstractColumn$class.name(AbstractColumn.scala:58)
at com.outworkers.phantom.column.Column.name(Column.scala:24)
at com.outworkers.phantom.column.PrimitiveColumn.qb(PrimitiveColumn.scala:38)
at com.outworkers.phantom.builder.query.RootCreateQuery$$anonfun$lightweight$1.apply(CreateQuery.scala:48)
at com.outworkers.phantom.builder.query.RootCreateQuery$$anonfun$lightweight$1.apply(CreateQuery.scala:48)
at scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:234)
at scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:234)
at scala.collection.immutable.Set$Set4.foreach(Set.scala:200)
at scala.collection.TraversableLike$class.map(TraversableLike.scala:234)
at scala.collection.AbstractSet.scala$collection$SetLike$$super$map(Set.scala:47)
at scala.collection.SetLike$class.map(SetLike.scala:92)
at scala.collection.AbstractSet.map(Set.scala:47)
at com.outworkers.phantom.builder.query.RootCreateQuery.lightweight(CreateQuery.scala:48)
at com.outworkers.phantom.builder.query.RootCreateQuery.ifNotExists(CreateQuery.scala:71)
at com.outworkers.phantom.CassandraTable.autocreate(CassandraTable.scala:92)
at com.cassandra.phantom.modeling.database.SongsDatabase$$anon$1$$anonfun$createQueries$1.apply(SongsDatabase.scala:15)
at com.cassandra.phantom.modeling.database.SongsDatabase$$anon$1$$anonfun$createQueries$1.apply(SongsDatabase.scala:15)
at com.outworkers.phantom.database.ExecutableCreateStatementsList.future(Database.scala:173)
at com.outworkers.phantom.database.Database.createAsync(Database.scala:85)
at com.outworkers.phantom.database.Database.create(Database.scala:75)
at com.cassandra.phantom.modeling.SongsStreaming$.main(Main.scala:29)
at com.cassandra.phantom.modeling.SongsStreaming.main(Main.scala)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at com.intellij.rt.execution.application.AppMain.main(AppMain.java:147)
Caused by: java.lang.ClassNotFoundException: scala.reflect.runtime.package$
at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
... 30 more
我解决了添加以下依赖项的问题
libraryDependencies += "org.scala-lang" % "scala-reflect" % scalaVersion.value
非常感谢NoClassDefFoundError是一个依赖性错误,您已经知道了。享受Scala和phantom-dsl。phantom不再使用Scala反射,我不确定这是需要的,我认为重启SBT只是神奇地解决了这个问题。