Simulating Graylog Query for Stream Messages

This function simulates querying Graylog for messages that match a specific query on a given stream.

Technology Stack : graypy, logging

Code Type : Function

Code Difficulty : Intermediate

                
                    
def graylog_query(stream, query):
    """
    Query Graylog for messages matching a specific query on a given stream.

    Args:
        stream (str): The name of the stream to query.
        query (str): The query string to use for filtering messages.

    Returns:
        list: A list of messages that match the query.
    """
    from graypy import GELFHandler
    from graypy import GELFFormatter
    from graypy import GraylogHandler

    # Create a GELF formatter
    gelf_formatter = GELFFormatter()

    # Create a GELF handler with the formatter
    gelf_handler = GraylogHandler(host='localhost', port=12201, formatter=gelf_formatter)

    # Create a logger with the GELF handler
    logger = logging.getLogger('graylog_query_logger')
    logger.addHandler(gelf_handler)
    logger.setLevel(logging.INFO)

    # Log a message to trigger the query
    logger.info(f"Querying stream '{stream}' with query '{query}'")

    # Wait for the query to be processed and return the results
    # This is a simulation, as Graylog does not support real-time querying through Python libraries
    # In a real-world scenario, you would have some mechanism to fetch the results
    return ["Mock message 1", "Mock message 2", "Mock message 3"]