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Analyze Kafka Data in Infragistics Reveal
Use the CData API Server to create an OData API on top of Kafka data and visualize live Kafka data in Ingragistics Reveal.
Reveal is a data visualization solution provided by Infragistics and can be paired with the CData API Server and Kafka ADO.NET Provider to build dynamic dashboards from live Kafka data. The CData API Server generates an OData API for Kafka, which is natively consumable in Reveal. In this article, we walk through connecting to Kafka in API Server and connecting to the API Server from Infragistics Reveal to create a simple dashboard.
Connect to Kafka from API Server
CData API Server uses a straightforward, point-and-click interface to connect to data sources and generate APIs.
- Open API Server and click Settings -> Connection -> Add Connection
- Select "Kafka"
- Enter the necessary authentication properties to connect to Kafka.
Set BootstrapServers and the Topic properties to specify the address of your Apache Kafka server, as well as the topic you would like to interact with.
Authorization Mechanisms
- SASL Plain: The User and Password properties should be specified. AuthScheme should be set to 'Plain'.
- SASL SSL: The User and Password properties should be specified. AuthScheme should be set to 'Scram'. UseSSL should be set to true.
- SSL: The SSLCert and SSLCertPassword properties should be specified. UseSSL should be set to true.
- Kerberos: The User and Password properties should be specified. AuthScheme should be set to 'Kerberos'.
You may be required to trust the server certificate. In such cases, specify the TrustStorePath and the TrustStorePassword if necessary.
Add Kafka Resource Definitions in API Server
After connecting to Kafka, create Resources, which represent API endpoints for Kafka data.
- Click Settings -> Resources -> Add Resource
- Select the Kafka connection
- Select the table you wish to retrieve and click Next
- (Optional) Edit the resource to select specific fields and more
- Save the settings
Add an API Server User
Create a User to connect to Kafka from Reveal through API Server.
- Click Settings -> Users
- Click Add
- Configure a User with access to the Kafka Connection and Resource(s)
(Optional) Configure Cross-Origin Resource Sharing (CORS)
When accessing and connecting to multiple different domains from an application such as Ajax, there is a possibility of violating the limitations of cross-site scripting. In that case, configure the CORS settings in Settings -> Server.
- Enable cross-origin resource sharing (CORS): ON
- Allow all domains without '*': ON
- Access-Control-Allow-Methods: GET, PUT, POST, OPTIONS
- Access-Control-Allow-Headers: Authorization
Save the changes to the settings.
Create a Dashboard in Reveal
With the API Server configured, we can visualize Kafka data in Reveal.
- Log into Reveal and click Dashboards -> New
- Click Data Source -> OData Feed
- Specify the API Server API endpoint URL, for example: https://serverurl/api.rsc
- Select Generic Credentials and specify the API Server username and authentication token
- Select the entity you wish to visualize
- Select fields and choose a chart type
More Information & Free Trial
At this point, you have created a simple dashboard from live Kafka data. For more information on creating OData feeds from Kafka (and more than 150 other sources), visit the API Server page. Download a free, 30-day trial and start working live Kafka data in tools that consume OData APIs.
