Stream Scrapfly Data into Apache Kafka Topics

Apache Kafka is an open-source stream processing platform that is primarily used for building real-time data pipelines and event-driven applications. When paired with the CData API Driver for JDBC, Kafka can work with live Scrapfly data. This article describes how to connect, access and stream Scrapfly data into Apache Kafka Topics and to start Confluent Control Center to help users secure, manage, and monitor the Scrapfly data received using Kafka infrastructure in the Confluent Platform.

With built-in optimized data processing, the CData JDBC Driver offers unmatched performance for interacting with live Scrapfly data. When you issue complex SQL queries to Scrapfly, the driver pushes supported SQL operations, like filters and aggregations, directly to Scrapfly and utilizes the embedded SQL engine to process unsupported operations client-side (often SQL functions and JOIN operations). Its built-in dynamic metadata querying allows you to work with and analyze Scrapfly data using native data types.

Prerequisites

Before connecting the CData JDBC Driver for streaming Scrapfly data in Apache Kafka Topics, install and configure the following in the client Linux-based system.

1. Confluent Platform for Apache Kafka
2. Confluent Hub CLI Installation
3. Self-Managed Kafka JDBC Source Connector for Confluent Platform

Define a New JDBC Connection to Scrapfly data

1. Download CData API Driver for JDBC on a Linux-based system
2. Follow the given instructions to create a new directory extract all the driver contents into it:
   1. Create a new directory named Scrapfly

      		mkdir API
      		

   2. Move the downloaded driver file (.zip) into this new directory

      		mv APIJDBCDriver.zip API/
      		

   3. Unzip the CData APIJDBCDriver contents into this new directory

      		unzip APIJDBCDriver.zip
      		

3. Open the Scrapfly directory and navigate to the lib folder

   ls
   cd lib/
   

4. Copy the contents of the lib folder of the CData API Driver for JDBC into the lib folder of Kafka Connect JDBC. Check the Kafka Connect JDBC folder contents to confirm that the cdata.jdbc.api.jar file is successfully copied into the lib folder

   cp -r /path/to/CData API Driver for JDBC/lib/* /usr/share/confluent-hub-components/confluentinc-kafka-connect-jdbc/lib/
   cd /usr/share/confluent-hub-components/confluentinc-kafka-connect-jdbc/lib/
   

5. Install the CData Scrapfly JDBC driver license using the given command, followed by your Name and Email ID

   	java -jar cdata.jdbc.api.jar -l
   	

6. Enter the product key or "TRIAL" (In the scenarios of license expiry, please contact our CData Support team)
7. Start the Confluent local services using the command:

   	confluent local services start
   	

   This starts all the Confluent Services like Zookeeper, Kafka, Schema Registry, Kafka REST, Kafka CONNECT, ksqlDB and Control Center. You are now ready to use the CData JDBC driver for Scrapfly to stream messages using Kafka Connect Driver into Kafka Topics on ksqlDB.

   
8. Create the Kafka topics manually using a POST HTTP API Request:

    curl --location 'server_address:8083/connectors' 
   	--header 'Content-Type: application/json'
   	--data '{ 
   		"name": "jdbc_source_cdata_api_01", 
   		"config": { 
   			"connector.class": "io.confluent.connect.jdbc.JdbcSourceConnector", 
   			"connection.url": "jdbc:api:Profile=C:\profiles\Scrapfly.apip;AuthScheme=APIKey;ProfileSettings='APIKey=your_api_key';",
   		"topic.prefix": "api-01-", 
   		"mode": "bulk" 
   		} 
   	}'
   

   Let us understand the fields used in the HTTP POST body (shown above):

   • connector.class: Specifies the Java class of the Kafka Connect connector to be used.
   • connection.url: The JDBC connection URL to connect with Scrapfly data.

     Built-in Connection String Designer

     For assistance in constructing the JDBC URL, use the connection string designer built into the CData API Driver for JDBC. Either double-click the JAR file or execute the jar file from the command-line.

     		java -jar cdata.jdbc.api.jar
     		

     Fill in the connection properties and copy the connection string to the clipboard.

     The Scrapfly API uses API Key authentication. The API key is passed as the key query parameter on every request.

     Using API Key Authentication

     Your Scrapfly API key is required to create a connection. To obtain your API key:

     1. Log into your Scrapfly account at scrapfly.io.
     2. Navigate to Dashboard and select API Keys.
     3. Copy your API key (begins with scp-live- for production or scp-test- for the test environment).

     After obtaining your API key, set the following connection properties:

     • AuthScheme: Set this to APIKey.
     • APIKey: Set this to your Scrapfly API key.

     Example connection string:

     Profile=C:\profiles\Scrapfly.apip;AuthScheme=APIKey;ProfileSettings='APIKey=your_api_key';
     

     
   • topic.prefix: A prefix that will be added to the Kafka topics created by the connector. It's set to "api-01-".
   • mode: Specifies the mode in which the connector operates. In this case, it's set to "bulk", which suggests that the connector is configured to perform bulk data transfer.

   This request adds all the tables/contents from Scrapfly as Kafka Topics.

   Note: The IP Address (server) to POST the request (shown above) is the Linux Network IP Address.

9. Run ksqlDB and list the topics. Use the commands:

   ksql
   list topics;
   

   
10. To view the data inside the topics, type the SQL Statement:

    PRINT topic FROM BEGINNING;
    

Connecting with the Confluent Control Center

To access the Confluent Control Center user interface, ensure to run the "confluent local services" as described in the above section and type http://<server address>:9021/clusters/ on your local browser.

Get Started Today

Download a free, 30-day trial of the CData API Driver for JDBC and start streaming Scrapfly data into Apache Kafka. Reach out to our Support Team if you have any questions.