Question

我试图使用gremlin scala为janusgraph设置一个IntelliJ版本的spark，但是我遇到了错误。

我的build.sbt文件是：

version := "1.0"

scalaVersion := "2.11.11"

libraryDependencies += "com.michaelpollmeier" % "gremlin-scala" % "2.3.0"
libraryDependencies += "org.apache.spark" %% "spark-core" % "2.2.1"
// https://mvnrepository.com/artifact/org.apache.spark/spark-sql
libraryDependencies += "org.apache.spark" %% "spark-sql" % "2.2.1"
// https://mvnrepository.com/artifact/org.apache.spark/spark-mllib
libraryDependencies += "org.apache.spark" %% "spark-mllib" % "2.2.1"
// https://mvnrepository.com/artifact/org.apache.spark/spark-hive
libraryDependencies += "org.apache.spark" %% "spark-hive" % "2.2.1"
// https://mvnrepository.com/artifact/org.janusgraph/janusgraph-core
libraryDependencies += "org.janusgraph" % "janusgraph-core" % "0.2.0"

libraryDependencies ++= Seq(
  "ch.qos.logback" % "logback-classic" % "1.2.3" % Test,
  "org.scalatest" %% "scalatest" % "3.0.3" % Test
)

resolvers ++= Seq(
  Resolver.mavenLocal,
  "Sonatype OSS" at "https://oss.sonatype.org/content/repositories/public"
)

但是当我尝试编译使用gremlin scala库或io.Source库的代码时，我遇到了错误。有人可以共享他们的构建文件或告诉我应该修改它来修复它。提前致谢。

所以，我试图编译这段代码：

import gremlin.scala._
import org.apache.commons.configuration.BaseConfiguration
import org.janusgraph.core.JanusGraphFactory


class Test1() {
  val conf = new BaseConfiguration()
  conf.setProperty("storage.backend", "inmemory")
  val gr = JanusGraphFactory.open(conf)
  val graph = gr.asScala()
  graph.close

}

object Test{
  def main(args: Array[String]) {
    val t = new Test1()
    println("in Main")
  }
}

我得到的错误是：

错误：（1,8）未找到：对象gremlin 导入gremlin.scala ._

错误：（10,18）值asScala不是org.janusgraph.core.JanusGraph的成员 val graph = gr.asScala（）

Answer 1

如果您转到Gremlin-Scala GitHub page，您会看到当前版本为＆＃34; 3.3.1.1＆＃34;那个

通常，您只需要在"com.michaelpollmeier" %% "gremlin-scala" % "SOME_VERSION"上添加一个依赖项，并为您的build.sbt添加一个您选择的图形数据库（本自述文件假定为tinkergraph）。最新版本显示在maven徽章中自述文件的顶部。

当主要版本的APi发生变化时，这并不奇怪图书馆是不同的。如果我将您的第一个依赖项更改为

//libraryDependencies += "com.michaelpollmeier" % "gremlin-scala" % "2.3.0" //old!
libraryDependencies += "com.michaelpollmeier" %% "gremlin-scala" % "3.3.1.1"

然后你的示例代码为我编译。

使用janusgraph和gremlin scala构建火花sbt

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