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Analyze Cassandra Data in Infragistics Reveal
Use the CData API Server to create an OData API on top of Cassandra data and visualize live Cassandra data in Ingragistics Reveal.
Reveal is a data visualization solution provided by Infragistics and can be paired with the CData API Server and Cassandra ADO.NET Provider to build dynamic dashboards from live Cassandra data. The CData API Server generates an OData API for Cassandra, which is natively consumable in Reveal. In this article, we walk through connecting to Cassandra in API Server and connecting to the API Server from Infragistics Reveal to create a simple dashboard.
Connect to Cassandra 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 "Cassandra"
- Enter the necessary authentication properties to connect to Cassandra.
Set the Server, Port, and Database connection properties to connect to Cassandra. Additionally, to use internal authentication set the User and Password connection properties.
Add Cassandra Resource Definitions in API Server
After connecting to Cassandra, create Resources, which represent API endpoints for Cassandra data.
- Click Settings -> Resources -> Add Resource
- Select the Cassandra 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 Cassandra from Reveal through API Server.
- Click Settings -> Users
- Click Add
- Configure a User with access to the Cassandra 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 Cassandra 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 Cassandra data. For more information on creating OData feeds from Cassandra (and more than 150 other sources), visit the API Server page. Download a free, 30-day trial and start working live Cassandra data in tools that consume OData APIs.
