Apply Custom Transforms

Etleap-provided Repository

1. Contact Etleap support to request that a GitHub repository is created and linked to your Etleap organization.
2. Provide the GitHub usernames that you would like to have write access to the repository.

Self-provided Repository

1. Set up your Github repository.
2. Grant the user etleap-transforms-prod Read Access.
3. Provide Etleap support with your repository URL so we can link it to your Etleap account.

Python

The example below is a Python file called test_function.py. The rules for Python transforms are as follows:

• A top-level function called apply that takes one or more arguments has to be defined. The arguments correspond to the values of the input fields.
• The apply function should return a dictionary where the column names are the keys.
• The functions can raise errors, which are caught and handled by Etleap’s data parsing error logic.
• Any standard library can be used. If you need a custom library, please contact support.

import math
import re
 
def apply(x):
  return {"col1":"Demo!" + x, "col2":math.cos(math.pi / 4.0), "col3":None, "col4":"asf"}

Java

The example below is a Java file called TestFunction.java. The rules for Java transforms are as follows:

• A method called apply that takes one or more arguments has to be defined. The arguments correspond to the values of the input fields.
• The apply method should return a Map<String, String> where the column names are the keys.
• The functions can throw exceptions, which are caught and handled by Etleap’s data parsing error logic.
• Any Java 8 standard library can be used. If you need a custom library, please contact support.

import java.util.Collections;
import java.util.Map;
 
public class TestFunction {
    public Map<String, String> apply(String input1, String input2) {
        return Collections.singletonMap("foo", "bar");
    }
}