Web Server Request And Response Input and Output Adapter Samples

About The Samples

In this sample, the TIBCO StreamBase® Web Server Request input adapter and TIBCO StreamBase® Web Server Response output adapter work together to serve up Http content, response to AJAX queries, web sockets, file downloads, and file uploads.

When this sample is started a web server is created on port 8080. This web server will server up the demo web site which demonstrates the various requests that can be performed against this server.

Running The Samples in StreamBase Studio

In the Package Explorer, double-click to open the webserver.sbapp. 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.
For the example, open a web browser to http://localhost:8080
In the Application Output view, observe tuples emitted on the RequestData and ResponseData output streams.
Select the tuple emitted from the RequestData and ResponseData streams, then use the triangles next to the data fields displayed to analyze and understand their structure.
Now on the demo web page severed by this example try out various operations and observe the results on the web page and in studio.
Press F9 or click the Stop Running Application button.
When done, press F9 or click the Stop Running Application button.

Running This Sample in Terminal Windows

This section describes how to run this sample in UNIX terminal windows or Windows command prompt windows. Running this sample in terminal windows does not provide the best illustration of the Web Server adapter, because tuples emitted are not easily human readable. Nevertheless, if you only have terminal access to a UNIX server running StreamBase, follow the steps in this section.

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 your workspace copy of the sample, as described above.
In window 1, type:
```
sbd -f sbd.sbconf webserver.sbapp
```
In window 2, type:
```
sbc dequeue RequestData
```
This window will display tuples dequeued from the adapter's request stream.
In window 3, type:
```
sbc dequeue ResponseData
```
This window will display tuples dequeued from the adapter's response stream.
For the example, open a web browser to http://localhost:8080
Observe that in window 2 and window 3 tuples are emitted from the RequestData and ResponseData streams.
In window 3, type Ctrl+C, then 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, select File → Load StreamBase Sample.
Select Web Server Request Response Adapters from the StreamBase Standard Adapters category.
Click OK.

StreamBase Studio creates a single project containing the sample files.

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_adapter_embedded_webserver

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/adapter/embedded/webserver

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.