EBS Live XML Input Adapter Sample

Contents

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

This sample demonstrates the use of the StreamBase EBS Live XML input adapter.

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 Input Adapters list.

  • Click OK.

StreamBase Studio creates a project for this sample.

Sample Location

By default, the sample files are installed in:

On Windows

C:\Program Files\StreamBase Systems\StreamBase.n.m\sample\adapter\embedded\ebslivexml\

On UNIX

/opt/streambase/sample/adapter/embedded/ebslivexml/

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_ebslivexml
Windows XP:
   C:\Documents and Settings\username\My Documents\
      StreamBase Studio n.m Workspace\sample_embedded_ebslivexml
Windows 7 and Windows Vista:
   C:\Users\username\Documents\StreamBase Studio n.m Workspace\
      sample_embedded_ebslivexml

Running This Sample in StreamBase Studio

Note

To use this sample, you will need to obtain access to a valid EBS Live XML market data server.

  1. In the Package Explorer, double-click EBSLiveXMLSample.sbapp.

  2. Select the adapter icon to open the Properties view for the adapter.

  3. Select the Adapter Properties tab and enter the Server Hostname and Port Number of the EBS Live XML server to which you have access.

  4. Click the Run button. This opens the SB Test/Debug perspective and starts the application.

  5. In the Test/Debug Perspective, open the Application Output view. If connectivity to your EBS Live server is configured correctly, look for tuples emitted on the IncomingMessages stream indicating that market data is flowing.

  6. In the Manual Input view, select the AdapterCommands stream. Enter disconnect in the command field. Click Send Data and observe that tuples stop flowing from the IncomingMessages stream. Also observe that a message has been printed to the console to indicate the adapters has disconnected from the EBS Live server.

  7. In the Manual Input view, select the AdapterCommands stream again and enter connect in the command field. Click Send Data and observe that tuples start flowing again from the IncomingMessages stream.

  8. 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.

  1. 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.

  2. In window 1, type:

    sbd EBSLiveXMLSample.sbapp

  3. In window 2, type:

    sbc dequeue -v

    This window displays the tuples dequeued from the adapter's output port.

  4. In window 3, disconnect from the EBS Live server:

    echo disconnect | sbc enqueue AdapterCommands

  5. Observe in window 2 that Tuples stop flowing from the IncomingMessages stream. A message is issued in window 1 to indicate the adapter has disconnected from the EBS Live server.

  6. In window 3, reconnect to the EBS Live server:

    echo connect | sbc enqueue AdapterCommands

  7. Observe in window 2 that Tuples start flowing again from the IncomingMessages stream. A message is issued in window 1 to indicate the adapter has reconnected to the EBS Live server.

  8. In window 3, type the following command to terminate the server and dequeuer:

    sbadmin shutdown