scala - 使用databricks dbutils-api的问题

我们如何尝试使用它？


将依赖项“ com.databricks” %%“ dbutils-api”％“ 0.0.1”添加到build.sbt
用代码写：

import com.databricks.dbutils_v1.DBUtilsHolder.dbutils class Job { // business logic .. val jobResult: String = ??? dbutils.notebook.exit(jobResult)}


当我们将代码打包到罐子中时，我们得到：

[error] missing or invalid dependency detected while loading class file 'NotebookUtils.class'.
[error] Could not access term common in package com.databricks.backend,
[error] because it (or its dependencies) are missing. Check your build definition for
[error] missing or conflicting dependencies. (Re-run with `-Ylog-classpath` to see the problematic classpath.)
[error] A full rebuild may help if 'NotebookUtils.class' was compiled against an incompatible version of com.databricks.backend.
[error] one error found
[error] (compile:compileIncremental) Compilation failed

最佳答案

原因甚至是目前dbutils-api的最新版本（0.0.3）都依赖于com.databricks.backend.common（它既不是dbutils-api的一部分，也不是任何其他公共databricks库的一部分）。

trait NotebookUtils ... {
...
  def getContext() : com.databricks.backend.common.rpc.CommandContext
  def setContext(ctx : com.databricks.backend.common.rpc.CommandContext) : scala.Unit
}

而：

jar tvf dbutils-api_2.11-0.0.3.jar | grep backend
   439 Tue Jan 01 11:00:00 MSK 1980 com/databricks/backend/daemon/dbutils/Default.class
  1337 Tue Jan 01 11:00:00 MSK 1980 com/databricks/backend/daemon/dbutils/FileInfo$$anonfun$hashCode$1.class
  1265 Tue Jan 01 11:00:00 MSK 1980 com/databricks/backend/daemon/dbutils/FileInfo$$anonfun$hashCode$2.class
  4109 Tue Jan 01 11:00:00 MSK 1980 com/databricks/backend/daemon/dbutils/FileInfo.class
  1256 Tue Jan 01 11:00:00 MSK 1980 com/databricks/backend/daemon/dbutils/GrantInfo.class
  1480 Tue Jan 01 11:00:00 MSK 1980 com/databricks/backend/daemon/dbutils/MountInfo.class
   452 Tue Jan 01 11:00:00 MSK 1980 com/databricks/backend/daemon/dbutils/PackageGroup.class
     0 Tue Jan 01 11:00:00 MSK 1980 com/databricks/backend/
     0 Tue Jan 01 11:00:00 MSK 1980 com/databricks/backend/daemon/
     0 Tue Jan 01 11:00:00 MSK 1980 com/databricks/backend/daemon/dbutils/

最可能的原因是com.databricks.backend.common在dbutils定义文件中标记了提供的作用域（但是我不能100％确定，因为此lib在开源中不可用）。
我宁愿将其视为Databricks库中的错误。