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# Filter Operator Sample

## About This Sample

This sample uses a Filter operator to pass only trades of 10000 shares or more. The input stream contains the fields `Symbol` and `Volume`.

This topic describes `Filter.sbapp`, the Filter operator sample application.

## Importing This Sample into StreamBase Studio

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

- From the top-level menu, click File → Load StreamBase Sample.

- Enter `operator` to narrow the list of options.

- Select Operator sample group from the Data Constructs and Operators category.

- Click OK.

StreamBase Studio creates a single project for all the operator samples.

## Running This Sample in StreamBase Studio

1. 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 Maven → Update Project from the context menu.

2. Open the `src/main/eventflow/com.tibco.sb.sample.operator` folder.

3. Open the `Filter.sbapp` file and click the Run button. This opens the SB Test/Debug perspective and starts the module.

4. In the Output Streams view, select the StockOut output stream

5. In the Manual Input view, select the StockIn input stream

6. Enter ``intc`` and `10000` in the Symbol and Volume fields, respectively

7. Click Send Data, and observe that data appears in the StockOut stream

8. Enter `9999` in the Volume field.

9. Click Send Data, and observe no new data appears in the StockOut stream.

10. When done, press F9 or click the Terminate EventFlow Fragment button.

## 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 default location of `studio-workspace` on your system.