Bridge eBay Connectivity with Apache NiFi

Apache NiFi supports powerful and scalable directed graphs of data routing, transformation, and system mediation logic. When paired with the CData JDBC Driver for eBay, NiFi can work with live eBay data. This article describes how to connect to and query eBay data from an Apache NiFi Flow.

With built-in optimized data processing, the CData JDBC Driver offers unmatched performance for interacting with live eBay data. When you issue complex SQL queries to eBay, the driver pushes supported SQL operations, like filters and aggregations, directly to eBay 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 eBay data using native data types.

Connecting to eBay Data in Apache NiFi

1. Download the CData JDBC Driver for eBay installer, unzip the package, run the .exe file to install the driver.

2. Copy the CData JDBC Driver JAR file (and license file if it exists), cdata.jdbc.ebay.jar (and cdata.jdbc.ebay.lic), to the Apache NiFi lib subfolder, for example, C:\nifi-1.3.0-bin\nifi-1.3.0\lib.

   On Windows, the default location for the CData JDBC Driver is C:\Program Files\CData\CData JDBC Driver for eBay.

3. Start Apache NiFi by running the run-nifi.bat file in bin subfolder, for example, C:\nifi-1.3.0-bin\nifi-1.3.0\bin.

   (OR)

   Use the command prompt to navigate to the particular directory and run the run-nifi.bat file for example:

   cd C:\nifi-1.3.0-bin\nifi-1.3.0\bin
   .\run-nifi.bat
   

4. Navigate to the Apache NiFi UI in your web browser: It should be https://localhost:8443/nifi.

   Note: If users are utilizing an older version of Apache NiFi, they should access it via http://localhost:8080/nifi. In earlier versions, HTTP was the protocol employed. However, in the most recent version, HTTPS is the standard. By default, HTTP operates on port 8080, while HTTPS uses port 8443.

5. When accessing Apache NiFi via a URL, it prompts you to enter a username and password for login.

   To retrieve login credentials, users should consult the 'App.log' file located within the log directory of their NiFi installation. This file typically contains the necessary details for accessing the NiFi interface.

6. Click the (Configuration) button from the Operate sidebar under the "NiFi Flow" process group.
7. In the NiFi Flow Configuration page, navigate to the "Controller Services" tab.
8. Click the button to create a new controller service.
9. In the Add Controller Service page, select "DBCPConnectionPool", and then click Add.
10. In the Configure Controller Service page, navigate to the "Properties" tab.
11. Click the gear button to configure the new DBCPConnection Pool.

12. Fill in the properties:

    Property	Value
    Database Connection URL	jdbc:ebay:AppId=MyAppId;CertId=MyCertId;DevId=MyDevId;SiteId=MySiteId;RuName=MyRuName;CallbackURL=http://localhost:33333;InitiateOAuth=GETANDREFRESH
    Database Driver Class Name	cdata.jdbc.ebay.EbayDriver
    Database Driver Location(s)	Path to your Apache NiFi's lib folder where the JAR files are present.

    Built-in Connection String Designer

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

    java -jar cdata.jdbc.ebay.jar

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

    If you will be accessing your own account, you can generate an OAuthAccessToken from your developer account dashboard. You can also allow other users to securely access their own accounts.

    Both of these methods require you to create an application key set to obtain values for the following connection properties: AppId, CertId, DevId, and SiteId.

    The user consent flow additionally requires the RuName and CallbackURL.

    See the "Getting Started" chapter in the help documentation for a guide to using OAuth.

13. To establish a connection and execute a select query, simply drag and drop the processor (indicated by the yellow highlight) into the workspace.
14. Select the 'ExecuteSQL' processor and click the 'Add' button to make it visible in the workspace.
15. Click on the added processor (ExecuteSQL)to open the connection page.
16. Click on the Verify Properties button and verify to test the connection.
17. Ensure that all the verification results are successful, and then click on APPLY.
18. Activate the connection by clicking the small button at the right corner of the screen.

Your eBay data is now available for use in Apache NiFi. For example, you can use the DBCPConnection Pool as the source for a QueryDatabaseTable processor (shown below).

Download a free, 30-day trial of the CData JDBC Driver for eBay and start working with your live eBay data in Apache NiFi. Reach out to our Support Team if you have any questions.