Contents
This topic explains AggregateByTup.sbapp
, the Aggregate operator tuple dimension sample.
This sample demonstrates two uses of the tuple-based Aggregate operator. The first uses a tuple-based Aggregate operator to calculate a moving average of price for each of four successive trades of a given stock. It also ensures that the aggregation works for intermixed tuples for different stocks. The second provides a sequence number for input tuples, using a window which does not close and the emit feature to emit an output tuple for every input tuple.
-
In the Package Explorer, double-click to open the
AggregateByTup.sbapp
application. Make sure the application is the currently active tab in the EventFlow Editor. -
Click the Run button. This opens the SB Test/Debug perspective and starts the application.
-
In the Application Output view, select the AvgPricePSOut output stream. No output is displayed at this point, but the dequeuer is prepared to receive output. This view will eventually show the output of the application.
-
In the Manual Input view, select the TradesIn input stream.
-
Enter
AMAT
and23
in the Symbol, and PricePerShare fields, respectively. -
Click
, and observe that no output is displayed yet in the Application Output view. -
Enter
AMAT
and24
in the Symbol, and PricePerShare fields, respectively. -
Click
, and observe that no output is displayed yet in the Application Output view. -
Again enter
AMAT
and24
in the Symbol, and PricePerShare fields, respectively. -
Click
. There is still no output in the Application Output view. -
Enter
AMAT
and25
in the Symbol, and PricePerShare fields, respectively. -
Click
, and observe this line in the Application Output view:Symbol=AMAT, MovingAverage=24.0
Tip
If output data is too long to easily see in the Application Output table, click a row to display its field data in the Display Fields pane below the table.
-
Enter
AMAT
and20
in the Symbol, and PricePerShare fields, respectively. -
Click
, and observe this line in the Application Output view:Symbol=AMAT, MovingAverage=23.25
-
Enter
AMAT
and21
in the Symbol, and PricePerShare fields, respectively. -
Click
, and observe this line in the Application Output view:Symbol=AMAT, MovingAverage=22.5
-
Enter
AMAT
and21
in the Symbol, and PricePerShare fields, respectively. -
Click
, and observe this line in the Application Output view:Symbol=AMAT, MovingAverage=21.75
-
Enter
AMAT
and22
in the Symbol, and PricePerShare fields, respectively. -
Click
, and observe this line in the Application Output view:Symbol=AMAT, MovingAverage=21.0
-
Enter
INTC
and27
in the Symbol, and PricePerShare fields, respectively. -
Click
, and observe no further output is displayed yet in the Application Output view. -
Enter
INTC
and28
in the Symbol, and PricePerShare fields, respectively. -
Click
, and observe no further output is displayed yet in the Application Output view: -
Enter
AMAT
and22
in the Symbol, and PricePerShare fields, respectively. -
Click
, and observe this line in the Application Output view:Symbol=AMAT, MovingAverage=21.5
-
Enter
INTC
and27
in the Symbol, and PricePerShare fields, respectively. -
Click
, and observe no further output is displayed yet in the Application Output view: -
Enter
AMAT
and23
in the Symbol, and PricePerShare fields, respectively. -
Click
, and observe this line in the Application Output view:Symbol=AMAT, MovingAverage=22.0
-
Enter
INTC
and28
in the Symbol, and PricePerShare fields, respectively. -
Click
, and observe this line in the Application Output view:Symbol=INTC, MovingAverage=27.5
-
Next, view the sequence number.
-
In the Application Output view, select the SeqOut output stream. No output is displayed at this point, but the dequeuer is prepared to receive output.
-
Change from Manual Input to the Feed Simulations view.
-
Right click on
SeqFeed.sbfs
and select . -
Notice on output how sequence_number increases by
1
. -
When done, press F9 or click the Stop Running Application button.
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.
-
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.
-
In window 1, type:
sbd AggregateByTup.sbapp
-
In window 2, type:
sbc dequeue AvgPricePSOut
No output is displayed at this point, but the dequeuer is prepared to receive output. This window will eventually show the output of the application.
-
In window 3, type:
sbc enqueue TradesIn
The sbc command is now awaiting keyboard input. Then type:
AMAT,23
No output is displayed yet in the dequeue window.
-
Type:
AMAT,24
No output is displayed yet in the dequeue window.
-
Type:
AMAT,24
No output is displayed yet in the dequeue window.
-
Type:
AMAT,25
Observe this line in the dequeue window:
AMAT,24
-
Type:
AMAT,20
Observe this line in the dequeue window:
AMAT,23.25
-
Type:
AMAT,21
Observe this line in the dequeue window:
AMAT,22.5
-
Type:
AMAT,21
Observe this line in the dequeue window:
AMAT,21.750000
-
Type:
AMAT,22
Observe this line in the dequeue window:
AMAT,21
-
Type:
INTC,27
No further output is displayed yet in the dequeue window.
-
Type:
INTC,28
No further output is displayed yet in the dequeue window.
-
Type:
AMAT,22
Observe this line in the dequeue window:
AMAT,21.5
-
Type:
INTC,27
No further output is displayed yet in the dequeue window.
-
Type:
AMAT,23
Observe this line in the dequeue window:
AMAT,22
-
Type:
INTC,28
Observe this line in the dequeue window:
INTC,27.5
-
In window 3, press Ctrl+C.
The sbc enqueue command exits.
-
In window 2, press Ctrl+C.
The sbc dequeue command exits.
-
In window 2, type:
sbc dequeue SeqOut
-
In window 3, type:
sbfeedsim -a ResourceFiles\SeqFeed.sbfs
Observe the sequence numbers in the dequeue window.
-
Stop the feed simulation:
In window 3, press Ctrl+C.
-
In window 3, type the following command to terminate the server and dequeuer:
sbadmin shutdown
In StreamBase Studio, import this sample with the following steps:
-
From the top menu, click
→ . -
Select operator from the Data Constructs and Operators category.
-
Click OK.
StreamBase Studio creates a single project for the operator samples.
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 default 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.