Examples of org.eclipse.ecf.datashare.IChannelListener

org.eclipse.ecf.datashare.IChannelListener
Listener for receiving messages sent to a given channel. The following types of events may be received asynchronously via this listener:
IChannelMessageEvent - delivered when this channel receives a message.
IChannelConnectEvent - delivered when this container or other remote containers connect.
IChannelDisconnectEvent - delivered when this channel or other remote containers disconnect.

Note these methods will be called asynchronously when notifications of remote changes are received by the provider implementation code. The provider is free to call the methods below with an arbitrary thread, so the implementation of these methods must be appropriately prepared.

For example, if the code implementing any of these methods must interact with user interface code, then it should use code such as the following to execute on the SWT UI thread:
```
 Display.getDefault().asyncExec(new Runnable() { public void run() { ... UI code here } }); 
```
Further, the code in the implementations of these methods should not block via I/O operations or blocking UI calls.

      }
    });
  }


  public IMergeableChannel createChannel(IChannelConfig newChannelConfig) throws ECFException {
    final IChannelListener listener = newChannelConfig.getListener();
    final SharedObjectDescription sodesc = new SharedObjectDescription(FeedSharedObject.class, IDFactory.getDefault().createGUID(), new HashMap());
    final SharedObjectTypeDescription sotypedesc = sodesc.getTypeDescription();
    ISharedObject sharedObject = null;
    if (sotypedesc.getName() != null) {
      sharedObject = SharedObjectFactory.getDefault().createSharedObject(sotypedesc, new Object[] {listener});

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    final ID serverID = IDFactory.getDefault().createStringID(targetURL);
    container.connect(serverID, null);
    // get IMergeableChannelContainer adapter
    final IMergeableChannelContainerAdapter channelContainer = (IMergeableChannelContainerAdapter) container.getAdapter(IMergeableChannelContainerAdapter.class);
    // create channel listener
    final IChannelListener listener = new IChannelListener() {
      public void handleChannelEvent(IChannelEvent event) {
        System.out.println("listener.handleChannelEvent(" + event + ")");
      }
    };
    // create a new channel

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    // Create channel ID with fixed name 'channel2'
    final ID channelID = IDFactory.getDefault().createID(
        channelContainer.getChannelNamespace(), CHANNEL_ID);
    // Setup listener so then when channelmessageevents are received that
    // they present in UI
    final IChannelListener channelListener = new IChannelListener() {
      public void handleChannelEvent(final IChannelEvent event) {
        if (event instanceof IChannelMessageEvent) {
          IChannelMessageEvent msg = (IChannelMessageEvent) event;
          scribbleView.handleDrawLine(msg.getData());
        }

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  protected IChannel createChannel(IContainer container) throws ECFException {
    IChannelContainerAdapter channelContainer = (IChannelContainerAdapter) container.getAdapter(IChannelContainerAdapter.class);
    if (channelContainer == null) throw new NullPointerException("cannot get channel container adapter");
    
    ID channelID = IDFactory.getDefault().createID(channelContainer.getChannelNamespace(), "channel1");
    IChannelListener channelListener = new IChannelListener() {
      public void handleChannelEvent(IChannelEvent event) {
        System.out.println("handleChannelEvent("+event+")");
      }};
    return channelContainer.createChannel(channelID, channelListener, new HashMap());
  }

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    // Create channel ID with fixed name 'channel2'
    final ID channelID = IDFactory.getDefault().createID(
        channelContainer.getChannelNamespace(), "channel2");
    // Setup listener so then when channelmessageevents are received that
    // they present in UI
    final IChannelListener channelListener = new IChannelListener() {
      public void handleChannelEvent(final IChannelEvent event) {
        if (event instanceof IChannelMessageEvent) {
          IChannelMessageEvent msg = (IChannelMessageEvent) event;
          showMessageInUI(new String(msg.getData()));
        } else System.out.println("got channel event " + event);

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   * 
   * @param containerId
   *            the target ID of the container has connected to
   */
  void fireChannelConnectEvent(final ID containerId) {
    IChannelListener listener = getListener();
    if (listener != null) {
      fireChannelEvent(listener, new IChannelConnectEvent() {
        public ID getChannelID() {
          return id;
        }

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   * 
   * @param containerId
   *            the target ID of the container has disconnected from
   */
  void fireChannelDisconnectEvent(final ID containerId) {
    IChannelListener listener = getListener();
    if (listener != null) {
      fireChannelEvent(listener, new IChannelDisconnectEvent() {
        public ID getChannelID() {
          return id;
        }

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   * @param message
   *            the message that was received
   */
  void processIncomingMessage(SocketChannel socketChannel, byte[] message) {
    // we read something, need to notify
    IChannelListener listener = getListener();
    if (listener != null) {
      // we have a listener, convert our data and then notify
      byte[][] messages = convert(message);
      if (messages != null) {
        fireMessageEvents(listener, socketChannel, messages);

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  public IChannelListener getListener() {
    return listener;
  }


  public IChannelListener setListener(IChannelListener listener) {
    IChannelListener previous = this.listener;
    this.listener = listener;
    return previous;
  }

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  }


  public void testChannelConnectEvent() throws Exception {
    final ID[] eventIds = new ID[2];


    channelA = createChannel(channelContainerA, new IChannelListener() {
      public void handleChannelEvent(IChannelEvent e) {
        if (e instanceof IChannelConnectEvent) {
          IChannelConnectEvent event = (IChannelConnectEvent) e;
          eventIds[0] = event.getChannelID();
          eventIds[1] = event.getTargetID();

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