Web Streams Adapter Sample

About The Samples

In this sample, the Spotfire Streaming Web Input adapter and Spotfire Streaming Web Output adapter are used to enqueue and dequeue data using REST input requests and WebSocket clients connected for output.

When this sample is started, a web server is created on port 10090 by default and will contain a webpage at the root which lists all available web input and output URLs along with their associated schemas.

Importing This Sample into StreamBase Studio

In StreamBase Studio, import this sample with the following steps:

  • From the top-level menu, select File>Import Samples and Community Content.

  • Enter rest to narrow the list of options.

  • Select REST Web Input and Web Socket Stream Output from the StreamBase Standard Adapters category.

  • Click Import Now.

StreamBase Studio creates a single project containing the sample files.

Running This Sample in StreamBase Studio

  1. In the Project Explorer view, open the sample you just loaded.

    If you see red marks on a project folder, wait a moment for the project to load its features.

    If the red marks do not resolve themselves after a minute, select the project, right-click, and select Maven>Update Project from the context menu.

  2. Open the src/main/eventflow/packageName folder.

  3. Open the WebStreams.sbapp file and click the Run button. This opens the SB Test/Debug perspective and starts the module.

  4. For the example, open a web browser to http://localhost:10090 and use the links provided to open the input and outputs you would like to enqueue or dequeue

  5. Open a web browser to the WebSocket Output Test Page

  6. Open a web browser to the Web Input Test Page and click the Send Request button

  7. In the Output Streams view, observe tuples emitted on the Output output stream.

  8. In the WebSocket Output Test Page view the output in the grid that was dequeued by the WebSocket.

  9. Open a web browser to the Web Input 2 Test Page and fill in some of the fields for the REST call and click the Send Request button, in this case the response is after the tuple is processed by event flow.

  10. When done, press F9 or click the Terminate EventFlow Fragment button.

Sample Location

When you load the sample into StreamBase® Studio, Studio copies the sample project's files to your Studio workspace, which is normally part of your home directory, with full access rights.


Load this sample in StreamBase® Studio, and thereafter use the Studio workspace copy of the sample to run and test it, even when running from the command prompt.

Using the workspace copy of the sample avoids permission problems. The default workspace location for this sample is:


See Default Installation Directories for the default location of studio-workspace on your system.