Contents
This sample shows how to use the TIBCO StreamBase® 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.
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In the Package Explorer view, in project
sample_decision-table, double-click to open thedecision-table.sbappapplication. -
With the
decision-table.sbappapplication selected and active, click the
button. This opens the SB Test/Debug perspective and starts the application.
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In the Manual Input view, select the
Inputstream, enterJane Doein theNamefield, and click . -
In the Application Output 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
Stop Running Application button.
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In the Package Explorer view, in project
sample_decision-table, double-click to open thedecision-table-streambase-expressions.sbappapplication. -
With the
decision-table-streambase-expressions.sbappapplication selected and active, click the button. This opens the SB Test/Debug perspective and starts the application.
-
In the Manual Input view, select the
Inputstream, enterPeterin theNamefield, and click . -
In the Application Output 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
Stop Running Application button.
In StreamBase Studio, import this sample with the following steps:
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From the top menu, click → .
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Select decision-table from the Data Constructs and Operators category.
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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_decision-tableSee 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/decision-tableSee Default Installation Directories for the default location of studio-workspace on your system.