* Fixed a bug where a user can break Netty when he or she calls setSuccess() on AbstractChannel.closeFuture

* UnfailingChannelFuture is not used anymore - deleting

src/main/java/org/jboss/netty/channel/AbstractChannel.java

@@ -64,7 +64,7 @@ public abstract class AbstractChannel implements Channel {
     private final ChannelFactory factory;
     private final ChannelPipeline pipeline;
     private final ChannelFuture succeededFuture = new SucceededChannelFuture(this);
-    private final ChannelFuture closeFuture = new UnfailingChannelFuture(this, false);
+    private final ChannelCloseFuture closeFuture = new ChannelCloseFuture();
     private volatile int interestOps = OP_READ;
 
     /** Cache for the string representation of this channel */
@@ -163,7 +163,7 @@ public abstract class AbstractChannel implements Channel {
      *                      closed yet
      */
     protected boolean setClosed() {
-        return closeFuture.setSuccess();
+        return closeFuture.setClosed();
     }
 
     public ChannelFuture bind(SocketAddress localAddress) {
@@ -309,4 +309,27 @@ public abstract class AbstractChannel implements Channel {
         }
         return answer;
     }
+
+    private final class ChannelCloseFuture extends DefaultChannelFuture {
+
+        public ChannelCloseFuture() {
+            super(AbstractChannel.this, false);
+        }
+
+        @Override
+        public boolean setSuccess() {
+            // User is not supposed to call this method - ignore silently.
+            return false;
+        }
+
+        @Override
+        public boolean setFailure(Throwable cause) {
+            // User is not supposed to call this method - ignore silently.
+            return false;
+        }
+
+        boolean setClosed() {
+            return super.setSuccess();
+        }
+    }
 }

src/main/java/org/jboss/netty/channel/UnfailingChannelFuture.java

@@ -1,46 +0,0 @@
-/*
- * Copyright 2009 Red Hat, Inc.
- *
- * Red Hat licenses this file to you under the Apache License, version 2.0
- * (the "License"); you may not use this file except in compliance with the
- * License.  You may obtain a copy of the License at:
- *
- *    http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
- * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
- * License for the specific language governing permissions and limitations
- * under the License.
- */
-package org.jboss.netty.channel;
-
-/**
- * The {@link ChannelFuture} which can not fail at all.  Any attempt to mark
- * this future as failure, by calling {@link #setFailure(Throwable)} will raise
- * an {@link IllegalStateException}.
- *
- * @author The Netty Project (netty-dev@lists.jboss.org)
- * @author Trustin Lee (trustin@gmail.com)
- *
- * @version $Rev$, $Date$
- */
-public class UnfailingChannelFuture extends DefaultChannelFuture {
-
-    /**
-     * Creates a new instance.
-     *
-     * @param channel
-     *        the {@link Channel} associated with this future
-     * @param cancellable
-     *        {@code true} if and only if this future can be canceled
-     */
-    public UnfailingChannelFuture(Channel channel, boolean cancellable) {
-        super(channel, cancellable);
-    }
-
-    @Override
-    public boolean setFailure(Throwable cause) {
-        throw new IllegalStateException("Can not fail", cause);
-    }
-}