Examples of java.nio.channels.SelectionKey.attach()

java.nio.channels.SelectionKey.attach()
Attaches an object to the key. @param anObject the object to attach @return the last attached object


                            if (channel.isConnected())
                            {
                                key = channel.register(selector,SelectionKey.OP_READ,null);
                                SelectChannelEndPoint endpoint = newEndPoint(channel,this,key);
                                key.attach(endpoint);
                                endpoint.dispatch();
                            }
                            else
                            {
                                channel.register(selector,SelectionKey.OP_CONNECT,null);

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                            if (_nextSet==_setID)
                            {
                                // bind connections to this select set.
                                SelectionKey cKey = channel.register(_selectSet[_nextSet].getSelector(), SelectionKey.OP_READ);
                                SelectChannelEndPoint endpoint=newEndPoint(channel,_selectSet[_nextSet],cKey);
                                cKey.attach(endpoint);
                                if (endpoint != null)
                                    endpoint.dispatch();
                            }
                            else
                            {

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            final SocketAddress address) throws IOException {
        ServerSocketChannel serverChannel = ServerSocketChannel.open();
        serverChannel.configureBlocking(false);
        serverChannel.socket().bind(address);
        SelectionKey key = serverChannel.register(this.selector, SelectionKey.OP_ACCEPT);
        key.attach(null);
        return serverChannel.socket().getLocalSocketAddress();
    }


    public void shutdown() throws IOException {
        if (this.closed) {

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        Reader reader = getReader();
        try {
          reader.startAdd();
          SelectionKey readKey = reader.registerChannel(channel);
          c = new Connection(readKey, channel, System.currentTimeMillis());
          readKey.attach(c);
          synchronized (connectionList) {
            connectionList.add(numConnections, c);
            numConnections++;
          }
          if (LOG.isDebugEnabled())

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                if (sessionRequest != null) {
                    sessionRequest.completed(session);
                }
            } catch (CancelledKeyException ex) {
                this.closedSessions.push(session);
                key.attach(null);
            }
        }
    }


    private void processClosedSessions() {

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                throw new IOReactorException("Failure registering channel " +
                        "with the selector", ex);
            }


            SessionRequestHandle requestHandle = new SessionRequestHandle(request); 
            key.attach(requestHandle);
            key.interestOps(SelectionKey.OP_CONNECT);
        }
    }


    public void shutdown() throws IOException {

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            Iterator<SelectionKey> it = selector.keys().iterator();
            // look at each key in the selected set
            while (it.hasNext()) {
                SelectionKey key = it.next();
                key.channel().close();
                key.attach(null);
                key.cancel();
            }
        }catch ( IOException ignore ){
            if (log.isWarnEnabled()) {
                log.warn("Unable to cleanup on selector close.",ignore);

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                                sk.interestOps(sk.interestOps() & (~ops));
                                if (SelectionKey.OP_WRITE==(ops&SelectionKey.OP_WRITE)) countDown(key.getWriteLatch());
                                if (SelectionKey.OP_READ==(ops&SelectionKey.OP_READ))countDown(key.getReadLatch());
                                if (sk.interestOps()==0) {
                                    sk.cancel();
                                    sk.attach(null);
                                }
                            }else {
                                sk.cancel();
                                sk.attach(null);
                            }

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                                    sk.cancel();
                                    sk.attach(null);
                                }
                            }else {
                                sk.cancel();
                                sk.attach(null);
                            }
                        }
                    }catch (CancelledKeyException cx) {
                        if (sk!=null) {
                            sk.cancel();

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                            }
                        }
                    }catch (CancelledKeyException cx) {
                        if (sk!=null) {
                            sk.cancel();
                            sk.attach(null);
                        }
                    }
                }
            };
            events.offer(r);

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