Contents
This sample shows how to use the Spotfire Streaming Decision Table operator.
The Decision Table operator evaluates a set of rules against each input tuple and emits an output tuple when a rule's conditions match the values in the input tuple.
The sample contains two StreamBase applications, each with a corresponding table in
StreamBase native (.sbdt) format. The native format
tables can also be replaced with their supplied respective tables in the Excel
(.xlsx) format. The decision-table.sbapp application uses simple condition and action
schemas and a small set of rules that illustrate the basic decision table rule
syntax. The decision-table-streambase-expressions.sbapp
application uses a more complex condition schema and set of rules that illustrate the
use of StreamBase expressions in condition and action columns.
See Using the Decision Table Operator for a description of the operator's properties.
In StreamBase Studio, import this sample with the following steps:
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From the top-level menu, click >.
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Enter
decisionto narrow the list of options. -
Select Decision tables containing rules from the Data Constructs and Operators category.
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Click .
StreamBase Studio creates a single project for the operator samples.
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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 > from the context menu.
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Open the
src/main/eventflow/folder.packageName -
Open the
decision-table.sbappfile and click the
button. This opens the SB
Test/Debug perspective and starts the module.
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In the Manual Input view, select the
Inputstream, enterJane Doein theNamefield, and click . -
In the Output Streams view, observe a tuple dequeued on the
Outputstream indicating a decision table rule has fired. -
Experiment by entering other values in the
NameandAgefields, clicking , and observing the resulting output tuples. -
When done, press F9 or click the
Terminate EventFlow Fragment button.
-
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 > from the context menu.
-
Open the
src/main/eventflow/folder.packageName -
Open the
decision-table-streambase-expressions.sbappfile and click the button. This opens the SB
Test/Debug perspective and starts the module.
-
In the Manual Input view, select the
Inputstream, enterPeterin theNamefield, and click . -
In the Output Streams view, observe a tuple dequeued on the
Outputstream indicating a decision table rule has fired. -
Experiment by entering other values in the fields, clicking , and observing the resulting output tuples.
-
When done, press F9 or click the
Terminate EventFlow Fragment button.
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_decision-table
See Default Installation
Directories for the default location of studio-workspace on your system.