Comparison Filter

name	Comparison Filter
version	v1.0.1
GitHub	comparison-filter
DockerHub	weevenetwork/comparison-filter
authors	Jakub Grzelak, Paul Gaiduk

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Table of Content

• Comparison Filter
  • Table of Content
  • Description
  • Module Variables
  • Module Testing
  • Dependencies
  • Input
  • Output

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Description

This module is responsible for filtering the data based on an algebraic comparisons : <, >, <=, >=, ==, !=.

Module Variables

The following module configurations can be provided in a data service designer section on weeve platform:

Environment Variables	type	Description
INPUT_LABEL	string	The input label on which anomaly is detected
CONDITION	string	Condition for filtering data
COMPARE_VALUE	string	The value to compare with
MODULE_NAME	string	Name of the module
MODULE_TYPE	string	Type of the module (Input, Processing, Output)
LOG_LEVEL	string	Allowed log levels: DEBUG, INFO, WARNING, ERROR, CRITICAL. Refer to logging package documentation.
INGRESS_HOST	string	Host to which data will be received
INGRESS_PORT	string	Port to which data will be received
EGRESS_URLS	string	HTTP ReST endpoint for the next module

Module Testing

To test module navigate to test directory. In test/assets edit both .json file to provide input for the module and expected output. During a test, data received from the listeners are compared against expected output data. You can run tests with make run_test.

Dependencies

The following are module dependencies:

• bottle
• requests

The following are developer dependencies:

• pytest
• flake8
• black

Input

Input to this module is JSON body single object:

Example of single object:

{
  temperature: 15
}

Output

Output of this module is JSON body the same as input data if chosen comparison condition is satisfied:

{
  temperature: 15
}