How to import dbutils in Scala?

In Scala, dbutils typically refers to a utility library provided by Databricks for interacting with databases and performing data-related tasks within Databricks environments. To import dbutils in Scala, follow these steps:

Steps:

1. Open a Databricks Notebook: First, ensure you’re working within a Databricks Notebook environment.
2. Create a Scala Notebook: Create a new Scala notebook or use an existing one.
3. Import dbutils: In a Scala notebook, dbutils is already available by default, so you don’t need to explicitly import it. You can directly use it in your Scala code.

Example 1:

Here’s an example of how you might use dbutils within a Databricks Scala notebook to read data from a CSV file and display the first few rows:

Scala

// Assuming you have a CSV file uploaded to Databricks File System (DBFS)
val filePath = "dbfs:/FileStore/sample.csv"

// Use dbutils to read the CSV file
val df = spark.read.option("header", "true").csv(filePath)

// Print a message indicating that the file is read successfully
println(s"File '$filePath' is read successfully.")

In this code:

1. dbutils is used implicitly to access the file system.
2. spark is the SparkSession object, which is also available by default in Databricks notebooks.

Output:

Example 2:

Another example demonstrating how to use dbutils in a Databricks Scala notebook to perform file operations like moving a file from one location to another within the Databricks File System (DBFS):

Scala

// Define source and destination file paths
val sourceFilePath = "/path/to/source/file.txt"
val destinationFilePath = "/path/to/destination/file.txt"

// Use dbutils to move the file from source to destination
dbutils.fs.mv(sourceFilePath, destinationFilePath)

// Check if the file has been moved successfully
val fileExistsAtDestination = dbutils.fs.ls(destinationFilePath).nonEmpty

if (fileExistsAtDestination) {
  println(s"File moved successfully from $sourceFilePath to $destinationFilePath")
} else {
  println(s"Failed to move file from $sourceFilePath to $destinationFilePath")
}

In this code:

1. We define the source and destination file paths within the Databricks File System (DBFS).
2. We use dbutils.fs.mv() to move the file from the source to the destination.
3. Then, we check if the file exists at the destination using dbutils.fs.ls().
4. Finally, we print a success or failure message based on whether the file exists at the destination.