protocol-framework: use lambdas

[controller.git] / opendaylight / commons / protocol-framework / src / main / java / org / opendaylight / protocol / framework / AbstractSessionNegotiator.java

diff --git a/opendaylight/commons/protocol-framework/src/main/java/org/opendaylight/protocol/framework/AbstractSessionNegotiator.java b/opendaylight/commons/protocol-framework/src/main/java/org/opendaylight/protocol/framework/AbstractSessionNegotiator.java
index 9f9f811e889f85c20352db331187f008b812bd85..a883eaf4ea1fa55980f3f897d4dcb45ca500c2bf 100644 (file)
--- a/opendaylight/commons/protocol-framework/src/main/java/org/opendaylight/protocol/framework/AbstractSessionNegotiator.java
+++ b/opendaylight/commons/protocol-framework/src/main/java/org/opendaylight/protocol/framework/AbstractSessionNegotiator.java
@@ -8,6 +8,7 @@
 package org.opendaylight.protocol.framework;
 
 import io.netty.channel.Channel;
+import io.netty.channel.ChannelFutureListener;
 import io.netty.channel.ChannelHandlerContext;
 import io.netty.channel.ChannelInboundHandlerAdapter;
 import io.netty.util.concurrent.Promise;
@@ -23,10 +24,11 @@ import com.google.common.base.Preconditions;
  * needing to provide only
  *
  * @param <M> Protocol message type
- * @param <S> Protocol session type, has to extend ProtocolSession<M>
+ * @param <S> Protocol session type, has to extend {@code ProtocolSession<M>}
  */
+@Deprecated
 public abstract class AbstractSessionNegotiator<M, S extends AbstractProtocolSession<?>> extends ChannelInboundHandlerAdapter implements SessionNegotiator<S> {
-    private final Logger logger = LoggerFactory.getLogger(AbstractSessionNegotiator.class);
+    private final Logger LOG = LoggerFactory.getLogger(AbstractSessionNegotiator.class);
     private final Promise<S> promise;
     protected final Channel channel;
 
@@ -39,42 +41,61 @@ public abstract class AbstractSessionNegotiator<M, S extends AbstractProtocolSes
     protected abstract void handleMessage(M msg) throws Exception;
 
     protected final void negotiationSuccessful(final S session) {
-        logger.debug("Negotiation on channel {} successful with session {}", channel, session);
+        LOG.debug("Negotiation on channel {} successful with session {}", channel, session);
         channel.pipeline().replace(this, "session", session);
         promise.setSuccess(session);
     }
 
-    protected final void negotiationFailed(final Throwable cause) {
-        logger.debug("Negotiation on channel {} failed", channel, cause);
+    protected void negotiationFailed(final Throwable cause) {
+        LOG.debug("Negotiation on channel {} failed", channel, cause);
         channel.close();
         promise.setFailure(cause);
     }
 
+    /**
+     * Send a message to peer and fail negotiation if it does not reach
+     * the peer.
+     *
+     * @param msg Message which should be sent.
+     */
+    protected final void sendMessage(final M msg) {
+        this.channel.writeAndFlush(msg).addListener(
+                (ChannelFutureListener) f -> {
+                    if (!f.isSuccess()) {
+                        LOG.info("Failed to send message {}", msg, f.cause());
+                        negotiationFailed(f.cause());
+                    } else {
+                        LOG.trace("Message {} sent to socket", msg);
+                    }
+                });
+    }
+
     @Override
     public final void channelActive(final ChannelHandlerContext ctx) {
-        logger.debug("Starting session negotiation on channel {}", channel);
+        LOG.debug("Starting session negotiation on channel {}", channel);
         try {
             startNegotiation();
-        } catch (Exception e) {
-            logger.warn("Unexpected negotiation failure", e);
+        } catch (final Exception e) {
+            LOG.warn("Unexpected negotiation failure", e);
             negotiationFailed(e);
         }
     }
 
     @Override
+    @SuppressWarnings("unchecked")
     public final void channelRead(final ChannelHandlerContext ctx, final Object msg) {
-        logger.debug("Negotiation read invoked on channel {}", channel);
+        LOG.debug("Negotiation read invoked on channel {}", channel);
         try {
             handleMessage((M)msg);
-        } catch (Exception e) {
-            logger.debug("Unexpected error while handling negotiation message {}", msg, e);
+        } catch (final Exception e) {
+            LOG.debug("Unexpected error while handling negotiation message {}", msg, e);
             negotiationFailed(e);
         }
     }
 
     @Override
     public void exceptionCaught(final ChannelHandlerContext ctx, final Throwable cause) {
-        logger.info("Unexpected error during negotiation", cause);
+        LOG.info("Unexpected error during negotiation", cause);
         negotiationFailed(cause);
     }
 }