[WICKET-6967] allow sending asynchronous messages

wicket-native-websocket/wicket-native-websocket-core/src/main/java/org/apache/wicket/protocol/ws/api/IWebSocketConnection.java

@@ -17,6 +17,7 @@
 package org.apache.wicket.protocol.ws.api;
 
 import java.io.IOException;
+import java.util.concurrent.Future;
 
 import org.apache.wicket.Application;
 import org.apache.wicket.protocol.ws.api.message.IWebSocketPushMessage;
@@ -55,6 +56,27 @@ public interface IWebSocketConnection
 	 */
 	IWebSocketConnection sendMessage(String message) throws IOException;
 
+    /**
+     * Sends a text message to the client in an asynchronous way.
+     *
+     * @param message
+     *      the text message
+     * @return a {@link java.util.concurrent.Future} representing the send operation
+     *
+     */
+    Future<Void> sendMessageAsync(String message);
+
+    /**
+     * Sends a text message to the client in an asynchronous way.
+     *
+     * @param message
+     *      the text message
+     * @param timeOut
+     *      the timeout for operation
+     * @return a {@link java.util.concurrent.Future} representing the send operation
+     */
+    Future<Void> sendMessageAsync(String message, long timeOut);
+
 	/**
 	 * Sends a binary message to the client.
 	 *
@@ -69,6 +91,34 @@ public interface IWebSocketConnection
 	 */
 	IWebSocketConnection sendMessage(byte[] message, int offset, int length) throws IOException;
 
+    /**
+     * Sends a binary message to the client in an asynchronous way.
+     *
+     * @param message
+     *      the binary message
+     * @param offset
+     *      the offset to read from
+     * @param length
+     *      how much data to read
+     * @return a {@link java.util.concurrent.Future} representing the send operation
+     */
+    Future<Void> sendMessageAsync(byte[] message, int offset, int length);
+
+    /**
+     * Sends a binary message to the client in an asynchronous way.
+     *
+     * @param message
+     *      the binary message
+     * @param offset
+     *      the offset to read from
+     * @param length
+     *      how much data to read
+     * @param timeOut
+     *      *      the timeout for operation
+     * @return a {@link java.util.concurrent.Future} representing the send operation
+     */
+    Future<Void> sendMessageAsync(byte[] message, int offset, int length, long timeOut);
+
 	/**
 	 * Broadcasts a push message to the wicket page (and it's components) associated with this
 	 * connection. The components can then send messages or component updates to client by adding

wicket-native-websocket/wicket-native-websocket-core/src/main/java/org/apache/wicket/protocol/ws/util/tester/TestWebSocketConnection.java

@@ -17,6 +17,7 @@
 package org.apache.wicket.protocol.ws.util.tester;
 
 import java.io.IOException;
+import java.util.concurrent.Future;
 
 import org.apache.wicket.Application;
 import org.apache.wicket.protocol.http.WebApplication;
@@ -62,15 +63,43 @@ public IWebSocketConnection sendMessage(String message) throws IOException
 		return this;
 	}
 
-	@Override
+    @Override
+    public Future<Void> sendMessageAsync(String message)
+    {
+        return sendMessageAsync(message, -1);
+    }
+
+    @Override
+    public Future<Void> sendMessageAsync(String message, long timeOut)
+    {
+        checkOpenness();
+        onOutMessage(message);
+        return null;
+    }
+
+    @Override
 	public IWebSocketConnection sendMessage(byte[] message, int offset, int length) throws IOException
 	{
 		checkOpenness();
 		onOutMessage(message, offset, length);
 		return this;
 	}
 
-	/**
+    @Override
+    public Future<Void> sendMessageAsync(byte[] message, int offset, int length)
+    {
+        return sendMessageAsync(message, offset, length, -1);
+    }
+
+    @Override
+    public Future<Void> sendMessageAsync(byte[] message, int offset, int length, long timeOut)
+    {
+        checkOpenness();
+        onOutMessage(message, offset, length);
+        return null;
+    }
+
+    /**
 	 * A callback method that is called when a text message should be send to the client
 	 *
 	 * @param message

wicket-native-websocket/wicket-native-websocket-javax/src/main/java/org/apache/wicket/protocol/ws/javax/JavaxWebSocketConnection.java

@@ -18,8 +18,10 @@
 
 import java.io.IOException;
 import java.nio.ByteBuffer;
+import java.util.concurrent.Future;
 
 import javax.websocket.CloseReason;
+import javax.websocket.RemoteEndpoint;
 import javax.websocket.Session;
 
 import org.apache.wicket.protocol.ws.api.AbstractWebSocketConnection;
@@ -82,7 +84,25 @@ public synchronized IWebSocketConnection sendMessage(String message) throws IOEx
 		return this;
 	}
 
-	@Override
+    @Override
+    public Future<Void> sendMessageAsync(String message)
+    {
+        checkClosed();
+
+        return session.getAsyncRemote().sendText(message);
+    }
+
+    @Override
+    public Future<Void> sendMessageAsync(String message, long timeOut)
+    {
+        checkClosed();
+
+        RemoteEndpoint.Async remoteEndpoint  = session.getAsyncRemote();
+        remoteEndpoint.setSendTimeout(timeOut);
+        return remoteEndpoint.sendText(message);
+    }
+
+    @Override
 	public synchronized IWebSocketConnection sendMessage(byte[] message, int offset, int length)
 		throws IOException
 	{
@@ -93,7 +113,28 @@ public synchronized IWebSocketConnection sendMessage(byte[] message, int offset,
 		return this;
 	}
 
-	private void checkClosed()
+    @Override
+    public Future<Void> sendMessageAsync(byte[] message, int offset, int length)
+    {
+        checkClosed();
+
+        ByteBuffer buf = ByteBuffer.wrap(message, offset, length);
+        return session.getAsyncRemote().sendBinary(buf);
+    }
+
+    @Override
+
+    public Future<Void> sendMessageAsync(byte[] message, int offset, int length, long timeOut)
+    {
+        checkClosed();
+
+        RemoteEndpoint.Async remoteEndpoint  = session.getAsyncRemote();
+        remoteEndpoint.setSendTimeout(timeOut);
+        ByteBuffer buf = ByteBuffer.wrap(message, offset, length);
+        return remoteEndpoint.sendBinary(buf);
+    }
+
+    private void checkClosed()
 	{
 		if (!isOpen())
 		{