Bidirectional BLOB Socket Input/Output Adapter Samples

About The Samples

The Spotfire Streaming Bidirectional BLOB Socket Reader and Writer Adapters can be used to send and receive data over a socket connection in BLOB format. This example shows how linked socket readers/writers work as both client and server. The example also shows how two different data transformers work (Serialized Tuple and BLOB).

The client in this example connects to the server and then sends an initial tuple of data. When the server receives data from the client socket, it echoes the tuple directly without modifying it. The client waits, and when it receives a response from the server it increments an integer in the response tuple by 1 and then sends the tuple back to the server. This handshaking continues until the parameter ${FinishedValue} is reached.

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 bidi to narrow the list of options.

  • Select Bidirectional BLOB socket input/output adapters 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 BLOBServerWithSerializedTupleClient.sbapp file and click the Run button. This opens the SB Test/Debug perspective and starts the module.

  4. For the example, in the Manual Input view select the ControlClient Stream, then enter CONNECT into the command field, then click Send Data to send the tuple.

  5. In the Output Streams view, observe tuples emitted on the ReadDataServer and ReadDataClient output streams.

  6. Select any tuple emitted from either stream and inspect tuple data fields in the Variables view below the output streams to analyze and understand their structure.

  7. 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.