484718 - Review idle timeout handling.

Introduced Connection.onIdleExpired().

jetty-io/src/main/java/org/eclipse/jetty/io/AbstractConnection.java

@@ -220,6 +220,12 @@ public abstract class AbstractConnection implements Connection
         getEndPoint().close();
     }
 
+    @Override
+    public boolean onIdleExpired()
+    {
+        return true;
+    }
+
     @Override
     public int getMessagesIn()
     {

jetty-io/src/main/java/org/eclipse/jetty/io/AbstractEndPoint.java

@@ -158,6 +158,10 @@ public abstract class AbstractEndPoint extends IdleTimeout implements EndPoint
     @Override
     protected void onIdleExpired(TimeoutException timeout)
     {
+        Connection connection = _connection;
+        if (connection != null && !_connection.onIdleExpired())
+            return;
+
         boolean output_shutdown=isOutputShutdown();
         boolean input_shutdown=isInputShutdown();
         boolean fillFailed = _fillInterest.onFail(timeout);

jetty-io/src/main/java/org/eclipse/jetty/io/Connection.java

@@ -73,6 +73,19 @@ public interface Connection extends Closeable
     @Override
     public void close();
 
+    /**
+     * <p>Callback method invoked upon an idle timeout event.</p>
+     * <p>Implementations of this method may return true to indicate that the idle timeout
+     * handling should proceed normally, typically failing the EndPoint and causing it to
+     * be closed.</p>
+     * <p>When false is returned, the handling of the idle timeout event is halted
+     * immediately and the EndPoint left in the state it was before the idle timeout event.</p>
+     *
+     * @return true to let the EndPoint handle the idle timeout,
+     *         false to tell the EndPoint to halt the handling of the idle timeout.
+     */
+    public boolean onIdleExpired();
+
     public int getMessagesIn();
     public int getMessagesOut();
     public long getBytesIn();

jetty-io/src/main/java/org/eclipse/jetty/io/ssl/SslConnection.java

@@ -171,6 +171,12 @@ public class SslConnection extends AbstractConnection
         getDecryptedEndPoint().getConnection().close();
     }
 
+    @Override
+    public boolean onIdleExpired()
+    {
+        return getDecryptedEndPoint().getConnection().onIdleExpired();
+    }
+
     @Override
     public void onFillable()
     {
@@ -328,17 +334,29 @@ public class SslConnection extends AbstractConnection
 
         public DecryptedEndPoint()
         {
-            super(null,getEndPoint().getLocalAddress(), getEndPoint().getRemoteAddress());
-            setIdleTimeout(getEndPoint().getIdleTimeout());
+            // Disable idle timeout checking: no scheduler and -1 timeout for this instance.
+            super(null, getEndPoint().getLocalAddress(), getEndPoint().getRemoteAddress());
+            super.setIdleTimeout(-1);
+        }
+
+        @Override
+        public long getIdleTimeout()
+        {
+            return getEndPoint().getIdleTimeout();
         }
 
         @Override
         public void setIdleTimeout(long idleTimeout)
         {
-            super.setIdleTimeout(idleTimeout);
             getEndPoint().setIdleTimeout(idleTimeout);
         }
 
+        @Override
+        public boolean isOpen()
+        {
+            return getEndPoint().isOpen();
+        }
+
         @Override
         protected WriteFlusher getWriteFlusher()
         {
@@ -922,12 +940,6 @@ public class SslConnection extends AbstractConnection
             super.close();
         }
 
-        @Override
-        public boolean isOpen()
-        {
-            return getEndPoint().isOpen();
-        }
-
         @Override
         public Object getTransport()
         {