Realtime Fraud Detection

This repository contains a demo for real-time fraud detection.

Installation prerequisites

• Docker Compose: This tutorial uses Docker Compose to manage an Apache Kafka environment (including sample data generation) and a Flink cluster (for remote execution). You can download and install Docker Compose from the official website.

Spinning up the services using Docker Compose

From your project directory, run docker compose up kafka init-kafka data-generator to create Kafka topics and generate sample data.

After a few seconds, you should see messages indicating your Kafka environment is ready:

realtime-fraud-detection-init-kafka-1      | Successfully created the following topics:
realtime-fraud-detection-init-kafka-1      | payment
realtime-fraud-detection-init-kafka-1      | order
realtime-fraud-detection-init-kafka-1      | sink
realtime-fraud-detection-init-kafka-1 exited with code 0
realtime-fraud-detection-data-generator-1  | Connected to Kafka
realtime-fraud-detection-data-generator-1  | Producing 20000 records to payment topic payment and order topic order

The payment Kafka topic contains messages in the following format:

{
    "createTime": "2023-09-20 22:19:02.224",
    "orderId": 1695248388,
    "payAmount": 88694.71922270155,
    "payPlatform": 0,
    "provinceId": 6,
}

The order Kafka topic contains messages in the following format:

{
    "createTime": "2024-07-19 20:47:25.707", 
    "orderId": 1721422046, 
    "category": "kids_pets", 
    "merchantId": 869,
}

In a separate terminal, we can explore what these messages look like:

>>> from kafka import KafkaConsumer
>>>
>>> consumer = KafkaConsumer("payment")
>>> for _, msg in zip(range(3), consumer):
...     print(msg)
... 
ConsumerRecord(topic='payment', partition=0, offset=628, timestamp=1702073942808, timestamp_type=0, key=None, value=b'{"createTime": "2023-12-08 22:19:02.808", "orderId": 1702074256, "payAmount": 79901.88673289565, "payPlatform": 1, "provinceId": 1}', headers=[], checksum=None, serialized_key_size=-1, serialized_value_size=131, serialized_header_size=-1)
ConsumerRecord(topic='payment', partition=0, offset=629, timestamp=1702073943310, timestamp_type=0, key=None, value=b'{"createTime": "2023-12-08 22:19:03.309", "orderId": 1702074257, "payAmount": 34777.62234573957, "payPlatform": 0, "provinceId": 3}', headers=[], checksum=None, serialized_key_size=-1, serialized_value_size=131, serialized_header_size=-1)
ConsumerRecord(topic='payment', partition=0, offset=630, timestamp=1702073943811, timestamp_type=0, key=None, value=b'{"createTime": "2023-12-08 22:19:03.810", "orderId": 1702074258, "payAmount": 17101.347666982423, "payPlatform": 0, "provinceId": 2}', headers=[], checksum=None, serialized_key_size=-1, serialized_value_size=132, serialized_header_size=-1)