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# UDP Multicast Mode Input and Output Adapter Sample

## About This Sample

This sample demonstrates the ability to both send and receive strings through the use of the TIBCO StreamBase® Input and Output Adapters for UDP, in multicast mode. Both the sender and receiver adapters are configured on the default Multicast Group IP and Port number. This sample contains one UDPSender and two UDPReceivers to illustrate the use of the multicast message delivery.

## Importing This Sample into StreamBase Studio

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

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

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

- Select UDP Multicast Mode Input and Output Adapters from the StreamBase Standard Adapters category.

- Click OK.

StreamBase Studio creates a project for the sample.

## 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/`packageName`` folder.

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

4. In the Feed Simulations view, select `input_stream_multi.sbfs` and click Run.

   There will be two copies of each tuple on the Output Streams view, one from each of the receiver output streams.

   Next, try selecting the Receiver2Control input stream from the drop-down menu in the Manual Input view. Type `disconnect` and click Send Data. This closes the connection to the multicast group for UDPReceiver2.

   One copy of each tuple appears on the Output Streams view.

   To reconnect, select the Receiver2Control input stream and send the command `connect`.

5. 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_adapter_embedded_udp_multicast

See Default Installation Directories for the default location of `studio-workspace` on your system.