When you configure the MapRStreams data object, specify the stream name that you read from in the following format:

/pathname:topic name

You can specify the stream name or use a regular expression for the stream name pattern only when you read from MapR Streams. The regular expression that you specify applies to the topic name and not the path name.

To subscribe to multiple topics that match a pattern, you can specify a regular expression. When you run the application on the cluster, the pattern matching is done against topics before the application runs. If you add a topic with a similar pattern when the application is already running, the application will not read from the topic.