Java Code Examples for java.nio.channels.SelectionKey#isConnectable()

The following examples show how to use java.nio.channels.SelectionKey#isConnectable() . You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.

Example 1

Source File: PassiveRedisIndexer.java From mldht with Mozilla Public License 2.0

6 votes

@Override
public void selectionEvent(SelectionKey key) throws IOException {
	if(key.isValid() && key.isConnectable()) {
		chan.finishConnect();
		conMan.interestOpsChanged(this);
	}
		
	if(key.isValid() && key.isReadable())
		read();
	if(key.isValid() && key.isWritable()) {
		awaitingWriteNotification = false;
		tryWrite.run();
		conMan.interestOpsChanged(this);
	}
		
	
}

Example 2

Source File: PassiveRedisIndexer.java From bt with Apache License 2.0

6 votes

@Override
public void selectionEvent(SelectionKey key) throws IOException {
	if(key.isValid() && key.isConnectable()) {
		chan.finishConnect();
		conMan.interestOpsChanged(this);
	}
		
	if(key.isValid() && key.isReadable())
		read();
	if(key.isValid() && key.isWritable()) {
		awaitingWriteNotification = false;
		tryWrite.run();
		conMan.interestOpsChanged(this);
	}
		
	
}

Example 3

Source File: ChannelManagerImpl.java From xenqtt with Apache License 2.0

6 votes

private void doConnect(long now, Set<SelectionKey> keys) {

		Iterator<SelectionKey> iter = keys.iterator();
		while (iter.hasNext()) {
			SelectionKey key = iter.next();
			try {
				if (key.isConnectable()) {
					MqttChannel channel = (MqttChannel) key.attachment();
					if (!channel.finishConnect()) {
						channelClosed(channel);
						iter.remove();
					}
				}
			} catch (CancelledKeyException e) {
				iter.remove();
			}
		}
	}

Example 4

Source File: NIOConnector.java From heisenberg with Apache License 2.0

6 votes

@Override
public void run() {
    final Selector selector = this.selector;
    for (;;) {
        ++connectCount;
        try {
            selector.select(1000L);
            connect(selector);
            Set<SelectionKey> keys = selector.selectedKeys();
            try {
                for (SelectionKey key : keys) {
                    Object att = key.attachment();
                    if (att != null && key.isValid() && key.isConnectable()) {
                        finishConnect(key, att);
                    } else {
                        key.cancel();
                    }
                }
            } finally {
                keys.clear();
            }
        } catch (Throwable e) {
            LOGGER.warn(name, e);
        }
    }
}

Example 5

Source File: CULNetworkHandlerImpl.java From openhab1-addons with Eclipse Public License 2.0

6 votes

private void processSelectedKeys(Set<SelectionKey> keys) throws Exception {
    Iterator<SelectionKey> itr = keys.iterator();
    while (itr.hasNext()) {
        SelectionKey key = itr.next();
        if (key.isReadable()) {
            processRead(key);
        }
        if (key.isWritable()) {
            processWrite(key);
        }
        if (key.isConnectable()) {
            processConnect(key);
        }
        if (key.isAcceptable()) {
            ;
        }
        itr.remove();
    }
}

Example 6

Source File: NonBlockingFetcher.java From SEAL with Apache License 2.0

5 votes

private static void processKeys() {
  Set<SelectionKey> keys = selector.selectedKeys();
  for (Iterator<SelectionKey> iter = keys.iterator(); iter.hasNext();) {
    SelectionKey key = iter.next();
    iter.remove();
    Work work = (Work) key.attachment();
    SocketChannel channel = (SocketChannel) key.channel();
    try {
      // If timed out
      if (System.currentTimeMillis() - startTime > timeout) {
        finished(channel, key, work);
        continue;
      }
      if (key.isConnectable() && channel.finishConnect()) {
        // If the Channel is connected, setup the Channel to
        // write the HTTP message to the remote server
        key.interestOps(SelectionKey.OP_WRITE);
      } else if (key.isWritable()) {
        // If the Channel is finished writing, setup the
        // Channel to read the HTTP response
        if (doWrite(channel, work))
          key.interestOps(SelectionKey.OP_READ);
      } else if (key.isReadable()) {
        // If the Channel is finished reading, call finished
        // to complete the work
        if (doRead(channel, work))
          finished(channel, key, work);
      }
    } catch (IOException ioe) {
      log.error("Failure during IO operation");
      finished(channel, key, work);
    }
  }
}

Example 7

Source File: PullMetaDataConnection.java From bt with Apache License 2.0

5 votes

@Override
public void selectionEvent(SelectionKey key) throws IOException {
	if(key.isValid() && key.isConnectable())
		connectEvent();
	if(key.isValid() && key.isReadable())
		canReadEvent();
	if(key.isValid() && key.isWritable())
		canWriteEvent();
}

Example 8

Source File: PullMetaDataConnection.java From mldht with Mozilla Public License 2.0

5 votes

@Override
public void selectionEvent(SelectionKey key) throws IOException {
	if(key.isValid() && key.isConnectable())
		connectEvent();
	if(key.isValid() && key.isReadable())
		canReadEvent();
	if(key.isValid() && key.isWritable())
		canWriteEvent();
}

Example 9

Source File: TestMessageIO.java From tracing-framework with BSD 3-Clause "New" or "Revised" License

5 votes

private static boolean awaitOp(Selector selector, SelectionKey key, int op) throws IOException {
    long end = System.currentTimeMillis() + SELECTION_TIMEOUT_MS;
    boolean selected = false;
    while (!selected) {
        // Check timeout
        long remaining = end - System.currentTimeMillis();
        if (remaining < 0) {
            break;
        }

        // Select up to remaining millis
        selector.select(remaining);

        // Handle op if possible
        switch (op) {
        case SelectionKey.OP_READ:
            selected |= key.isReadable();
            break;
        case SelectionKey.OP_ACCEPT:
            selected |= key.isAcceptable();
            break;
        case SelectionKey.OP_WRITE:
            selected |= key.isWritable();
            break;
        case SelectionKey.OP_CONNECT:
            selected |= key.isConnectable();
            break;
        }
    }
    return selected;
}

Example 10

Source File: Progress.java From twister2 with Apache License 2.0

5 votes

private void handleSelectedKeys() {
  Set<SelectionKey> selectedKeys = selector.selectedKeys();

  Iterator<SelectionKey> keyIterator = selectedKeys.iterator();
  while (keyIterator.hasNext()) {
    SelectionKey key = keyIterator.next();
    keyIterator.remove();

    SelectHandler callback = (SelectHandler) key.attachment();

    if (!key.isValid()) {
      callback.handleError(key.channel());
      continue;
    }

    if (key.isValid() && key.isWritable()) {
      callback.handleWrite(key.channel());
    }

    if (key.isValid() && key.isReadable()) {
      callback.handleRead(key.channel());
    }

    if (key.isValid() && key.isConnectable()) {
      callback.handleConnect(key.channel());
    }

    if (key.isValid() && key.isAcceptable()) {
      callback.handleAccept(key.channel());
    }
  }
}

Example 11

Source File: NioClientManager.java From bitherj with Apache License 2.0

5 votes

private void handleKey(SelectionKey key) throws IOException {
    // We could have a !isValid() key here if the connection is already closed at this point
    if (key.isValid() && key.isConnectable()) { // ie a client connection which has finished
        // the initial connect process
        // Create a ConnectionHandler and hook everything together
        StreamParser parser = (StreamParser) key.attachment();
        SocketChannel sc = (SocketChannel) key.channel();
        ConnectionHandler handler = new ConnectionHandler(parser, key, connectedHandlers);
        try {
            if (sc.finishConnect()) {
                log.info("Successfully connected to {}", sc.socket().getRemoteSocketAddress());
                key.interestOps(SelectionKey.OP_READ).attach(handler);
                handler.parser.connectionOpened();
            } else {
                log.error("Failed to connect to {}", sc.socket().getRemoteSocketAddress());
                handler.closeConnection(); // Failed to connect for some reason
            }
        } catch (Exception e) {
            // If e is a CancelledKeyException, there is a race to get to interestOps after
            // finishConnect() which
            // may cause this. Otherwise it may be any arbitrary kind of connection failure.
            // Calling sc.socket().getRemoteSocketAddress() here throws an exception,
            // so we can only log the error itself
            handler.closeConnection();
        }
    } else if (key.isValid()) // Process bytes read
    {
        ConnectionHandler.handleKey(key);
    }
}

Example 12

Source File: NIOConnector.java From Mycat-NIO with Apache License 2.0

5 votes

@Override
public void run() {
	final Selector selector = this.selector;
	for (;;) {
		++connectCount;
		try {
			selector.select(1000L);
			connect(selector);
			Set<SelectionKey> keys = selector.selectedKeys();
			try {
				for (SelectionKey key : keys) {
					Object att = key.attachment();
					if (att != null && key.isValid() && key.isConnectable()) {
						finishConnect(key, att);

					} else {
						key.cancel();
					}
				}
			} finally {
				keys.clear();
			}
		} catch (Throwable e) {
			LOGGER.warn(name, e);
		}
	}
}

Example 13

Source File: TimeClientHandler.java From JavaInterview with Apache License 2.0

5 votes

private void handleDataFromServer(SelectionKey key) throws IOException {
    if (key.isValid()) {
        SocketChannel sc = (SocketChannel) key.channel();
        //判断先前是否连接成功，如果构造器里面的socketChannel已经连接成功了，
        // 则此处不会有connectable的操作select到
        if (key.isConnectable()) {
            if (sc.finishConnect()) {
                sc.register(this.selector, SelectionKey.OP_READ);
                doWrite(sc);
            } else {
                //连接失败，程序退出
                System.out.println("connect failed!!!");
                System.exit(-1);
            }
        }

        // read the data from server
        if (key.isReadable()) {
            ByteBuffer readBuf = ByteBuffer.allocate(1024);
            int readByteLen = sc.read(readBuf);
            if (readByteLen > 0) {
                readBuf.flip();
                byte[] readBytes = new byte[readBuf.remaining()];
                readBuf.get(readBytes);
                String body = new String(readBytes, "UTF-8");
                System.out.println("Now is:" + body);
                this.stop = true;
            }
        }
    }
}

Example 14

Source File: NioTcpClient.java From dnsjava with BSD 2-Clause "Simplified" License

5 votes

public void processReadyKey(SelectionKey key) {
  if (key.isValid())
    if (key.isConnectable()) {
      processConnect(key);
    } else {
      if (key.isWritable()) {
        processWrite(key);
      }
      if (key.isReadable()) {
        processRead();
      }
    }
}

Example 15

Source File: Reactor.java From TarsJava with BSD 3-Clause "New" or "Revised" License

5 votes

private void dispatchEvent(final SelectionKey key) throws IOException {
    if (key.isConnectable()) {
        acceptor.handleConnectEvent(key);
    } else if (key.isAcceptable()) {
        acceptor.handleAcceptEvent(key);
    } else if (key.isReadable()) {
        acceptor.handleReadEvent(key);
    } else if (key.isValid() && key.isWritable()) {
        acceptor.handleWriteEvent(key);
    }
}

Example 16

Source File: OioSctpChannel.java From netty4.0.27Learn with Apache License 2.0

5 votes

@Override
protected void doConnect(SocketAddress remoteAddress,
                         SocketAddress localAddress) throws Exception {
    if (localAddress != null) {
        ch.bind(localAddress);
    }

    boolean success = false;
    try {
        ch.connect(remoteAddress);
        boolean  finishConnect = false;
        while (!finishConnect) {
            if (connectSelector.select(SO_TIMEOUT) >= 0) {
                final Set<SelectionKey> selectionKeys = connectSelector.selectedKeys();
                for (SelectionKey key : selectionKeys) {
                   if (key.isConnectable()) {
                       selectionKeys.clear();
                       finishConnect = true;
                       break;
                   }
                }
                selectionKeys.clear();
            }
        }
        success = ch.finishConnect();
    } finally {
        if (!success) {
            doClose();
        }
    }
}

Example 17

Source File: OioSctpChannel.java From netty-4.1.22 with Apache License 2.0

5 votes

@Override
protected void doConnect(SocketAddress remoteAddress,
                         SocketAddress localAddress) throws Exception {
    if (localAddress != null) {
        ch.bind(localAddress);
    }

    boolean success = false;
    try {
        ch.connect(remoteAddress);
        boolean  finishConnect = false;
        while (!finishConnect) {
            if (connectSelector.select(SO_TIMEOUT) >= 0) {
                final Set<SelectionKey> selectionKeys = connectSelector.selectedKeys();
                for (SelectionKey key : selectionKeys) {
                   if (key.isConnectable()) {
                       selectionKeys.clear();
                       finishConnect = true;
                       break;
                   }
                }
                selectionKeys.clear();
            }
        }
        success = ch.finishConnect();
    } finally {
        if (!success) {
            doClose();
        }
    }
}

Example 18

Source File: NioSelectorLoop.java From TakinRPC with Apache License 2.0

4 votes

@Override
public void run() {

    while (running) {

        try {
            select();

            Set<SelectionKey> selectionKeys = selector.selectedKeys();

            if (selectionKeys.isEmpty()) {
                continue;
            }

            Iterator<SelectionKey> iterator = selectionKeys.iterator();
            while (iterator.hasNext()) {

                final SelectionKey key = iterator.next();
                iterator.remove();

                if (!key.isValid()) {
                    continue;
                }

                if (key.isAcceptable()) {
                    doAccept(key);
                }

                if (key.isConnectable()) {
                    doConnect(key);
                }

                if (key.isValid() && key.isReadable()) {
                    doRead(key);
                }

                if (key.isValid() && key.isWritable()) {
                    doWrite(key);
                }
            }

        } catch (Throwable t) {
            LOGGER.warn("Unexpected exception in the selector loop.", t);

            // 睡眠1S, 防止连续的异常导致cpu消耗
            try {
                Thread.sleep(1000);
            } catch (InterruptedException ignore) {
            }
        }
    }
}

Example 19

Source File: NIOServer.java From JavaBase with MIT License

4 votes

private void start() throws Exception {
  Selector selector = Selector.open();

  //通过OPEN方法来打开一个未绑定的ServerSocketChannel 实例
  ServerSocketChannel server = ServerSocketChannel.open();

  //将该ServerSocketChannel绑定到指定 ip 端口
  server.bind(new InetSocketAddress(PORT));

  //设置是NIO 非阻塞模式
  server.configureBlocking(false);

  //将sever注册到指定Selector对象上
  server.register(selector, SelectionKey.OP_ACCEPT);

  while (!stop) {
    // 因为只有在选择了至少一个通道后，才会返回该选择器的唤醒方法，或者当前线程中断，以先到者为准。否则一直阻塞
    selector.select();

    //依次处理selector上的每个已经准备好的管道
    Set<SelectionKey> selectedKeys = selector.selectedKeys();
    for (SelectionKey sk : selectedKeys) {
      //从selector上的已选择key集 中删除正在处理的连接请求
      selector.selectedKeys().remove(sk);

      // 连接 accept
      if (sk.isAcceptable()) {
        register(selector, server, sk);
      }
      // 连接建立
      else if (sk.isConnectable()) {
        System.out.println("close");
      }
      // 读就绪
      else if (sk.isReadable()) {
        readContent(selector, sk);
      }
      // 写就绪
      else if (sk.isWritable()) {

      }
    }
  }
}

Example 20

Source File: Transfer.java From nitroshare-android with MIT License

4 votes

/**
 * Perform the transfer until it completes or an error occurs
 */
@Override
public void run() {
    try {
        // Indicate which operations select() should select for
        SelectionKey selectionKey = mSocketChannel.register(
                mSelector,
                mTransferStatus.getDirection() == TransferStatus.Direction.Receive ?
                        SelectionKey.OP_READ :
                        SelectionKey.OP_CONNECT
        );

        // For a sending transfer, connect to the remote device
        if (mTransferStatus.getDirection() == TransferStatus.Direction.Send) {
            mSocketChannel.connect(new InetSocketAddress(mDevice.getHost(), mDevice.getPort()));
        }

        while (true) {
            mSelector.select();
            if (mStop) {
                break;
            }
            if (selectionKey.isConnectable()) {
                mSocketChannel.finishConnect();
                selectionKey.interestOps(SelectionKey.OP_READ | SelectionKey.OP_WRITE);

                synchronized (mTransferStatus) {
                    mTransferStatus.setState(TransferStatus.State.Transferring);
                    notifyStatusChangedListeners();
                }
            }
            if (selectionKey.isReadable()) {
                if (!processNextPacket()) {
                    if (mTransferStatus.getDirection() == TransferStatus.Direction.Receive) {
                        selectionKey.interestOps(SelectionKey.OP_WRITE);
                    } else {
                        break;
                    }
                }
            }
            if (selectionKey.isWritable()) {
                if (!sendNextPacket()) {
                    if (mTransferStatus.getDirection() == TransferStatus.Direction.Receive) {
                        break;
                    } else {
                        selectionKey.interestOps(SelectionKey.OP_READ);
                    }
                }
            }
        }

        // Close the socket
        mSocketChannel.close();

        // If interrupted, throw an error
        if (mStop) {
            throw new IOException("transfer was cancelled");
        }

        // Indicate success
        synchronized (mTransferStatus) {
            mTransferStatus.setState(TransferStatus.State.Succeeded);
            notifyStatusChangedListeners();
        }

    } catch (IOException e) {
        synchronized (mTransferStatus) {
            mTransferStatus.setState(TransferStatus.State.Failed);
            mTransferStatus.setError(e.getMessage());
            notifyStatusChangedListeners();
        }
    }
}