RSS Reader Input Adapter Sample

Contents

Summary
Importing This Sample into StreamBase Studio
Sample Location
Running This Sample in StreamBase Studio
Running This Sample in Terminal Windows

Summary

This sample demonstrates reading RSS data from a website. The RSS Reader is configured to connect to two popular RSS feeds from nytimes.com. You must be connected to the Internet for this sample to function properly.

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 this sample from the Embedded Adapters list.
Click OK.

StreamBase Studio creates a single project containing the sample files.

Sample Location

By default, the sample files are installed in:

On Windows: C:\Program Files\StreamBase Systems\StreamBase.n.m\sample\adapter\embedded\rssreader\
On UNIX: /opt/streambase/sample/adapter/embedded/rssreader/

When you load the sample into StreamBase Studio, Studio copies the sample project's files to your Studio workspace. StreamBase Systems recommends that you use the workspace copy of the sample, especially on UNIX, where you may not have write access to /opt/streambase. In the default installation, the path to this sample in your Studio workspace is:

UNIX:       
  ~/streambase-studio-n.m-workspace/sample_adapter_embedded_rssreader
Windows XP:
  C:\Documents and Settings\username\My Documents\StreamBase Studio n.m Workspace\
      sample_adapter_embedded_rssreader
Windows 7 and Windows Vista:
  C:\Users\username\Documents\StreamBase Studio n.m Workspace\
      sample_adapter_embedded_rssreader

Running This Sample in StreamBase Studio

In the Package Explorer, double-click to open the RSSReader.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. The RSS input adapter instance in this application does not start when the application starts.
Start the RSS Reader adapter. To do so, open a terminal windows on UNIX, or a StreamBase Command Prompt on Windows, and type the following command:
```
sbadmin resume default.RSSFeedAggregator
```
As the RSS server sends lines of input to the application, they appear in the Application Output pane.
When done, press F9 or click the Stop Running Application button.

Running This Sample 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 RSSReader.sbapp
```
In window 2, type:
```
sbc dequeue RSSFeedOutput
```

In window 3, type:

sbadmin resume default.RSSFeedAggregator

Look for the processed tuples containing RSS feed information being output in window 2.
In window 3, type the following command to terminate the server and dequeuer:

sbadmin shutdown