ETP Browser - Streaming

Documentation > User Guide > ETP Browser

Streaming provides the ability to describe object URIs and stream their historical and real-time channel data.

Streaming

Consists of the following fields:

  • Max Data Items - sets the maxDataItems in the Start message of ChannelStreaming and limits the number of data points in a single message

  • Max Msg Rate - sets the maxMessageRate in the Start message of ChannelStreaming. This tells the server to not send two channel messages within a smaller window than this value (in milliseconds)

  • URI - refers to a single channel or a higher level object, such as a well, wellbore, or log. After typing or pasting a value in the text box click "Add" to add the URI to the URI List

  • URI List - an array of URIs that will be used for describing and streaming

Streaming Types
  • Latest Value - this will start channel streaming from the latest values on all the channels identified from the Describe

  • Index Count - this will stream the last n values on all the channels identified from the Describe

  • Time Index - this can be used to either start streaming from a particular point in time by just setting the Start Time or by doing a Range Request by specifying both start and end time

  • Depth Index - this can be used to either start streaming from a particular index point by just setting the Start Index or by doing a Range Request by specifying both start and end index

Buttons
  • Start - sends a Start message for ChannelStreaming using the current ETP session

  • Describe - sends a Describe message using the URI list as an array of URIs

  • Start Streaming - sends a channelStreamingStart message all the channels identified from the Describe

  • Stop Streaming - sends a channelStreamingStop message all the channels identified from the Describe

  • Request Range - sends a channelRanges message for all the channels identified from the Describe with the StartIndex and EndIndex values from the "Time Index" and "Depth Index" fields

Documentation > User Guide > ETP Browser