Split Operator Sample

Contents

This Sample's Files
Running Split.sbapp in StreamBase Studio
Running Split.sbapp in Terminal Windows
Importing This Sample into StreamBase Studio
Sample Location

The Split operator is used to make sure tuples on one stream are processed before tuples on a different stream, when two or more streams originate in a single output port. For this sample application, the application designer decided it is more important to process users on an IP address before multiple IP addresses for a single user. This application sends the tuple to two streams because each stream processes the data in a way that is incompatible with the other stream.

This Sample's Files

The sample includes the following files in the ResourceFiles subdirectory:

A CSV trace file containing sample data, Split-IPandUserLogin.csv.
A feed simulation file, Split.sbfs, that references the trace file.

Running Split.sbapp in StreamBase Studio

In the Package Explorer, double-click to open the Split.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 All Streams.
In the Feed Simulations view, select Split.sbfs and click Run.
As the Feed Simulation sends input tuples to the application, they appear in the Application Input view.
In the Application Output view, notice that as the Split operator receives each tuple, it first sends the tuple along the top path (which is processed as far to the right in the diagram as it can proceed) before the Split operator releases a copy of the same tuple along the bottom path. This control eventually results in the Application Output display of:
```
INTRUSION_TooManyUsersForIP IP=127.0.0.1, CountOfUsers=11
```
before we see:
```
INTRUSION_TooManyIPsForUser UserID=101, CountOfIPs=11
```
from the Output Stream on the lower path.
After the CSV file reaches the last record, the Feed Simulation stops automatically.
When done, press F9 or click the Stop Running Application button.

Running Split.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.

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 Split.sbapp
```
In window 2: type:
```
sbc dequeue
```
No output is displayed at this point, but the dequeuer is prepared to receive output. This window eventually shows the output of the application.
In window 3, type:
```
sbfeedsim ResourceFiles\Split.sbfs
```
Observe lines like the following in the dequeue window:
```
INTRUSION_TooManyIPsForUser,101,11
INTRUSION_TooManyUsersForIP,127.0.0.1,11
INTRUSION_TooManyUsersForIP,127.0.0.1,5
INTRUSION_TooManyUsersForIP,127.0.0.3,4
INTRUSION_TooManyUsersForIP,127.0.7.1,4
```
Notice what happened: as the Split operator received each tuple, it first sent the tuple along the top path (which was processed as far to the right in the diagram as it could proceed) before the Split operator released a copy of the same tuple along the bottom path.
In window 3, type the following command to terminate the server and dequeuer:

sbadmin shutdown

Importing This Sample into StreamBase Studio

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

From the top menu, click File → Load 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 the permission problems that can occur when trying to work with the initially installed location of the sample. 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 location of streambase-install-dir on your system. This location may require administrator privileges for write access, depending on your platform.