Merge "Fixed for bug 1168 : Issue while update subnet"

[controller.git] / opendaylight / md-sal / sal-rest-connector / src / main / java / org / opendaylight / controller / sal / streams / websockets / WebSocketServerHandler.java

diff --git a/opendaylight/md-sal/sal-rest-connector/src/main/java/org/opendaylight/controller/sal/streams/websockets/WebSocketServerHandler.java b/opendaylight/md-sal/sal-rest-connector/src/main/java/org/opendaylight/controller/sal/streams/websockets/WebSocketServerHandler.java
index 618ee57abab305668d069f7a6031cc0fabc8d8f5..ce12d34e083f2ca440c754ab736aed1834276e0f 100644 (file)
--- a/opendaylight/md-sal/sal-rest-connector/src/main/java/org/opendaylight/controller/sal/streams/websockets/WebSocketServerHandler.java
+++ b/opendaylight/md-sal/sal-rest-connector/src/main/java/org/opendaylight/controller/sal/streams/websockets/WebSocketServerHandler.java
@@ -8,6 +8,7 @@ import static io.netty.handler.codec.http.HttpResponseStatus.BAD_REQUEST;
 import static io.netty.handler.codec.http.HttpResponseStatus.FORBIDDEN;
 import static io.netty.handler.codec.http.HttpResponseStatus.INTERNAL_SERVER_ERROR;
 import static io.netty.handler.codec.http.HttpVersion.HTTP_1_1;
+
 import io.netty.buffer.ByteBuf;
 import io.netty.buffer.Unpooled;
 import io.netty.channel.ChannelFuture;
@@ -25,14 +26,16 @@ import io.netty.handler.codec.http.websocketx.WebSocketFrame;
 import io.netty.handler.codec.http.websocketx.WebSocketServerHandshaker;
 import io.netty.handler.codec.http.websocketx.WebSocketServerHandshakerFactory;
 import io.netty.util.CharsetUtil;
-
 import java.io.IOException;
-
 import org.opendaylight.controller.sal.streams.listeners.ListenerAdapter;
 import org.opendaylight.controller.sal.streams.listeners.Notificator;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
+/**
+ * {@link WebSocketServerHandler} is implementation of {@link SimpleChannelInboundHandler} which allow handle
+ * {@link FullHttpRequest} and {@link WebSocketFrame} messages.
+ */
 public class WebSocketServerHandler extends SimpleChannelInboundHandler<Object> {
 
     private static final Logger logger = LoggerFactory.getLogger(WebSocketServerHandler.class);
@@ -40,7 +43,7 @@ public class WebSocketServerHandler extends SimpleChannelInboundHandler<Object>
     private WebSocketServerHandshaker handshaker;
 
     @Override
-    protected void channelRead0(ChannelHandlerContext ctx, Object msg) throws Exception {
+    protected void channelRead0(final ChannelHandlerContext ctx, final Object msg) throws Exception {
         if (msg instanceof FullHttpRequest) {
             handleHttpRequest(ctx, (FullHttpRequest) msg);
         } else if (msg instanceof WebSocketFrame) {
@@ -48,8 +51,15 @@ public class WebSocketServerHandler extends SimpleChannelInboundHandler<Object>
         }
     }
 
-    private void handleHttpRequest(ChannelHandlerContext ctx, FullHttpRequest req)
-            throws Exception {
+    /**
+     * Checks if HTTP request method is GET and if is possible to decode HTTP result of request.
+     *
+     * @param ctx
+     *            ChannelHandlerContext
+     * @param req
+     *            FullHttpRequest
+     */
+    private void handleHttpRequest(final ChannelHandlerContext ctx, final FullHttpRequest req) throws Exception {
         // Handle a bad request.
         if (!req.getDecoderResult().isSuccess()) {
             sendHttpResponse(ctx, req, new DefaultFullHttpResponse(HTTP_1_1, BAD_REQUEST));
@@ -73,19 +83,29 @@ public class WebSocketServerHandler extends SimpleChannelInboundHandler<Object>
         }
 
         // Handshake
-        WebSocketServerHandshakerFactory wsFactory = new WebSocketServerHandshakerFactory(
-                getWebSocketLocation(req), null, false);
+        WebSocketServerHandshakerFactory wsFactory = new WebSocketServerHandshakerFactory(getWebSocketLocation(req),
+                null, false);
         handshaker = wsFactory.newHandshaker(req);
         if (handshaker == null) {
-            WebSocketServerHandshakerFactory.sendUnsupportedWebSocketVersionResponse(ctx.channel());
+            WebSocketServerHandshakerFactory.sendUnsupportedVersionResponse(ctx.channel());
         } else {
             handshaker.handshake(ctx.channel(), req);
         }
 
     }
 
-    private static void sendHttpResponse(ChannelHandlerContext ctx,
-            HttpRequest req, FullHttpResponse res) {
+    /**
+     * Checks response status, send response and close connection if necessary
+     *
+     * @param ctx
+     *            ChannelHandlerContext
+     * @param req
+     *            HttpRequest
+     * @param res
+     *            FullHttpResponse
+     */
+    private static void sendHttpResponse(final ChannelHandlerContext ctx, final HttpRequest req,
+            final FullHttpResponse res) {
         // Generate an error page if response getStatus code is not OK (200).
         if (res.getStatus().code() != 200) {
             ByteBuf buf = Unpooled.copiedBuffer(res.getStatus().toString(), CharsetUtil.UTF_8);
@@ -101,7 +121,15 @@ public class WebSocketServerHandler extends SimpleChannelInboundHandler<Object>
         }
     }
 
-    private void handleWebSocketFrame(ChannelHandlerContext ctx, WebSocketFrame frame) throws IOException {
+    /**
+     * Handles web socket frame.
+     *
+     * @param ctx
+     *            {@link ChannelHandlerContext}
+     * @param frame
+     *            {@link WebSocketFrame}
+     */
+    private void handleWebSocketFrame(final ChannelHandlerContext ctx, final WebSocketFrame frame) throws IOException {
         if (frame instanceof CloseWebSocketFrame) {
             handshaker.close(ctx.channel(), (CloseWebSocketFrame) frame.retain());
             String streamName = Notificator.createStreamNameFromUri(((CloseWebSocketFrame) frame).reasonText());
@@ -119,15 +147,21 @@ public class WebSocketServerHandler extends SimpleChannelInboundHandler<Object>
     }
 
     @Override
-    public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause)
-            throws Exception {
+    public void exceptionCaught(final ChannelHandlerContext ctx, final Throwable cause) throws Exception {
         if (cause instanceof java.nio.channels.ClosedChannelException == false) {
-            //cause.printStackTrace();
+            // cause.printStackTrace();
         }
         ctx.close();
     }
 
-    private static String getWebSocketLocation(HttpRequest req) {
+    /**
+     * Get web socket location from HTTP request.
+     *
+     * @param req
+     *            HTTP request from which the location will be returned
+     * @return String representation of web socket location.
+     */
+    private static String getWebSocketLocation(final HttpRequest req) {
         return "http://" + req.headers().get(HOST) + req.getUri();
     }