Merge Operator Sample

This sample uses a Merge operator to interlace trades from a Reuters and the Interactive Data PlusFeed (formerly Comstock), based on trade time. The input streams contain the fields Symbol, Volume, PricePS (per share), Time, and FeedID.

Running Merge.sbapp in StreamBase Studio

  1. In the Package Explorer, double-click to open the Merge.sbapp application. Make sure the application is the currently active tab in the EventFlow Editor.

  2. Click the Run button. This opens the SB Test/Debug perspective and starts the application.

  3. In the Application Output view, select the MergeOut output stream. No output is displayed at this point, but the dequeuer is prepared to receive output. This view eventually shows the output of the application.

  4. In the Manual Input view, select the ComstockIn input stream

  5. Enter amat, 100, 23, 10, and 0 in the Symbol, Volume, PricePS, Time, and FeedID fields, respectively.

    Click Send Data, and observe that no output is displayed yet in the Application Output view.

  6. Enter amat, 23, 10, and 1 in the Symbol, Volume, PricePS, Time, and FeedID fields, respectively.

    Click Send Data, and observe that no output is displayed yet in the Application Output view.

  7. Select the ReutersIn input stream.

  8. Enter intc, 200, 21, 11, and 0 in the Symbol, Volume, PricePS, Time, and FeedID fields, respectively.

    Click Send Data, and observe this data appears in the Application Output view:

    Symbol=amat, Volume=100, PricePS=23.0, Time=10, FeedID=0
  9. Enter intc, 200, 21, 11, and 1 in the Symbol, Volume, PricePS, Time, and FeedID fields, respectively.

    Click Send Data, and observe this data appears in the Application Output view.

    Symbol=amat, Volume=100, PricePS=23.0, Time=10, FeedID=1
  10. Enter msft, 100, 40, 12, and 0 in the Symbol, Volume, PricePS, Time, and FeedID fields, respectively.

    Click Send Data, and observe that no further output is displayed yet in the Application Output view.

  11. Enter msft, 100, 40, 12, and 1 in the Symbol, Volume, PricePS, Time, and FeedID fields, respectively.

    Click Send Data, and observe that no further output is displayed yet in the Application Output view.

  12. Select the ComstockIn input stream.

  13. Enter amat, 300, 24, 15, and 0 in the Symbol, Volume, PricePS, Time, and FeedID fields, respectively.

    Click Send Data, and observe this data appears in the Application Output view.

    Symbol=intc, Volume=200, PricePS=21.0, Time=11, FeedID=0
    Symbol=msft, Volume=100, PricePS=40.0, Time=12, FeedID=0
  14. Enter amat, 300, 24, 15, and 1 in the Symbol, Volume, PricePS, Time, and FeedID fields, respectively.

    Click Send Data, and observe this data appears in the Application Output view.

    Symbol=intc, Volume=200, PricePS=21.0, Time=11, FeedID=1
    Symbol=msft, Volume=100, PricePS=40.0, Time=12, FeedID=1
  15. When done, press F9 or click the Stop Running Application button.

Running Merge.sbapp in Terminal Windows

This section describes how to run the sample in UNIX terminal windows or Windows command prompt windows. On Windows, be sure to use the StreamBase Command Prompt from the Start menu as described in the Test/Debug Guide, not the default command prompt.

  1. Open three terminal windows on UNIX, or three StreamBase Command Prompts on Windows. In each window, navigate to the directory where the sample is installed, or to your workspace copy of the sample, as described above.

  2. In window 1, type:

    sbd Merge.sbapp

    The window shows notice[StreamBaseServer] listening on port 10000.

  3. In window 2, type:

    sbc dequeue MergeOut

    No output is displayed at this point, but the dequeuer is prepared to receive output. This window eventually shows the output of the application.

  4. In window 3, type:

    sbc enqueue

    The sbc command is now waiting for keyboard input. Type: ComstockIn,amat,100,23,10,0

    No output is displayed yet in the dequeue window.

  5. Type:

    ComstockIn,amat,100,23,10,1.

    No output is displayed yet in the dequeue window.

  6. Type:

    ReutersIn,intc,200,21,11,0.

    Observe this line in the dequeue window:

    amat,100,23.000000,10,0.

  7. Type:

    ReutersIn,intc,200,21,11,1.

    Observe this line in the dequeue window:

    amat,100,23.000000,10,1.

  8. Type:

    ReutersIn,msft,100,40,12,0.

    No further output is displayed yet in the dequeue window.

  9. Type:

    ReutersIn,msft,100,40,12,1.

    No further output is displayed yet in the dequeue window.

  10. Type:

    ComstockIn,amat,300,24,15,0.

    Observe these lines in the dequeue window:

    intc,200,21.000000,11,0
    msft,100,40.000000,12,0
  11. Type:

    ComstockIn,amat,300,24,15,1.

    Observe these lines in the dequeue window:

    intc,200,21.000000,11,1
    msft,100,40.000000,12,1
  12. In window 2, type: Ctrl+Z (Windows) or Ctrl+D (UNIX) to exit the sbc session.

  13. In window 3, type the following command to terminate the server and dequeuer:

    sbadmin shutdown

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Importing This Sample into StreamBase Studio

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

  • From the top menu, click FileLoad StreamBase Sample.

  • Select operator from the Data Constructs and Operators category.

  • Click OK.

StreamBase Studio creates a single project for the operator samples.

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.

Important

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:

studio-workspace/sample_operator

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

In the default TIBCO StreamBase installation, this sample's files are initially installed in:

streambase-install-dir/sample/operator

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