Import Real-Time Apache Airflow Data via ODBC in ColdFusion to Build Applications

Adobe ColdFusion is a web and mobile application development platform. It uses its own scripting language, ColdFusion Markup Language (CFML), to create data-driven websites as well as generate remote services, such as REST. When ColdFusion is paired with the CData API Driver for ODBC, you can link your ColdFusion web and mobile applications to operational Apache Airflow data. This allows for your applications to be more robust and complete. This article details how to use the ODBC driver to create a table populated with Apache Airflow data from within a ColdFusion markup file.

To follow along with this tutorial, you need to install the CData API Driver for ODBC and Adobe ColdFusion.

Configuring the Connection

If you have not already, first specify connection properties in an ODBC DSN (Data Source Name). This is the last step of the driver installation process. You can use the Microsoft ODBC Data Source Administrator to create and configure ODBC DSNs.

Start by setting the Profile connection property to the location of the ApacheAirflow Profile on disk (e.g. C:\profiles\ApacheAirflow.apip). Next, set the ProfileSettings connection property to the connection string for ApacheAirflow (see below).

ApacheAirflow API Profile Settings

Apache Airflow 3 uses JWT Bearer tokens for API authentication. You can generate a token from the Airflow web UI under Settings or via the Airflow CLI using airflow users create and the /api/v2/auth/token endpoint. Note that this profile targets Apache Airflow 3.x using the /api/v2 REST API. The legacy /api/v1 endpoint used by Airflow 2.x is not supported.

After setting the following connection properties, you are ready to connect:

• AuthScheme: Set this to APIKey.
• APIKey: Set this to your Apache Airflow JWT Bearer token.
• Server: Set this to the base URL of your Airflow instance (e.g. http://localhost:8080).

Adding a Data Source and Creating a Table

After creating a DSN, follow the steps below to add a new data source, test our connection to it, create a ColdFusion markup file, and, finally, import Apache Airflow Data and display it in a table in ColdFusion:

1. From the ColdFusion administrator interface, choose Data & Services.
2. Here, click "Add New Data Source". The data source name can be any name, provided it conforms to the ColdFusion variable naming conventions. For our ODBC driver, choose "ODBC Socket", then click the "Add" button.
3. From the ODBC DSN Dropdown menu select CData Apache Airflow Sys. Under the Advanced Settings section, leave the Connection String blank. Note that any properties specified in this input field will override the ones specified in the DSN Configuration.
4. Now, test the connection by pressing the check mark to the left of the CDataApache AirflowODBC data source you just created. When the data source reports an "OK" status, it is ready for use.
5. Next, create a new ColdFusion Markup file (.cfm) and place it in the wwwroot directory ("C:\ColdFusion2021\cfusion\wwwroot") for ColdFusion.

   The following code queries the data source:

               
           <cfquery name="Apache AirflowQuery" dataSource="CDataApache AirflowODBC"> 
             SELECT * FROM DagRuns 
           </cfquery> 
       

   And a CFTable can be used to quickly output the table in HTML:

               
             <cftable  
             query = "Apache AirflowQuery" 
             border = "1" 
             colHeaders 
             colSpacing = "2" 
             headerLines = "2" 
             HTMLTable 
             maxRows = "500" 
             startRow = "1"> 
   
             <cfcol header="<b>DagRunId</b>" align="Left" width=2 text="DagRunId"/> 
   
             <cfcol header="<b>State</b>" align="Left" width=15 text="State"/> 
   
             ...
   
           </cftable> 
       

   Full code, including the HTML portion is available below:

               
           <html> 
           <head><title>CData Software | Apache Airflow DagRuns Table Demo </title></head> 
           <body> 
           <cfoutput>#ucase("Apache Airflow DagRuns Table Demo")#</cfoutput> 
           <cfquery name="Apache AirflowQuery" dataSource="CDataApache AirflowODBC"> 
   
             SELECT * FROM DagRuns 
   
           </cfquery> 
           <cftable  
             query = "Apache AirflowQuery" 
             border = "1" 
             colHeaders 
             colSpacing = "2" 
             headerLines = "2" 
             HTMLTable 
             maxRows = "500" 
             startRow = "1"> 
             <cfcol header="<b>DagRunId</b>" align="Left" width=2 text="DagRunId"/> 
   
             <cfcol header="<b>State</b>" align="Left" width=15 text="State"/> 
   
             ...
   
           </cftable> 
           </body> 
   
           </html>  
       

6. Finally, run the code in a browser. It produces a table populated with Apache Airflow data!

As a note, the CData ODBC Drivers also support parameterized queries using the cfqueryparam element. For example:

SELECT * FROM Account WHERE name =  

Get Started Today

Download a free, 30-day trial of the CData ODBC Driver for Apache Airflow and start building Apache Airflow-connected applications with Adobe ColdFusion. Reach out to our Support Team if you have any questions.