public void handleDownstream(final ChannelHandlerContext context, final ChannelEvent evt) throws Exception { if (evt instanceof ChannelStateEvent) { ChannelStateEvent e = (ChannelStateEvent) evt; switch (e.getState()) { case OPEN: case CONNECTED: case BOUND: if (Boolean.FALSE.equals(e.getValue()) || e.getValue() == null) { closeOutboundAndChannel(context, e); return; } } } if (!(evt instanceof MessageEvent)) { context.sendDownstream(evt); return; } MessageEvent e = (MessageEvent) evt; if (!(e.getMessage() instanceof ChannelBuffer)) { context.sendDownstream(evt); return; } // Do not encrypt the first write request if this handler is // created with startTLS flag turned on. if (startTls && sentFirstMessage.compareAndSet(false, true)) { context.sendDownstream(evt); return; } // Otherwise, all messages are encrypted. ChannelBuffer msg = (ChannelBuffer) e.getMessage(); PendingWrite pendingWrite; if (msg.readable()) { pendingWrite = new PendingWrite( evt.getFuture(), msg.toByteBuffer(msg.readerIndex(), msg.readableBytes())); } else { pendingWrite = new PendingWrite(evt.getFuture(), null); } synchronized (pendingUnencryptedWrites) { boolean offered = pendingUnencryptedWrites.offer(pendingWrite); assert offered; } wrap(context, evt.getChannel()); }