Java tutorial
/* * Copyright 2012 The Netty Project * * The Netty Project 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 io.netty.channel.socket; import io.netty.buffer.ByteBufAllocator; import io.netty.channel.ChannelException; import io.netty.channel.ChannelOption; import io.netty.channel.DefaultChannelConfig; import io.netty.channel.MessageSizeEstimator; import io.netty.channel.RecvByteBufAllocator; import io.netty.channel.WriteBufferWaterMark; import io.netty.util.internal.ObjectUtil; import io.netty.util.internal.PlatformDependent; import java.net.Socket; import java.net.SocketException; import java.util.Map; import static io.netty.channel.ChannelOption.*; /** * The default {@link SocketChannelConfig} implementation. */ public class DefaultSocketChannelConfig extends DefaultChannelConfig implements SocketChannelConfig { protected final Socket javaSocket; private volatile boolean allowHalfClosure; /** * Creates a new instance. */ public DefaultSocketChannelConfig(SocketChannel channel, Socket javaSocket) { super(channel); this.javaSocket = ObjectUtil.checkNotNull(javaSocket, "javaSocket"); // Enable TCP_NODELAY by default if possible. if (PlatformDependent.canEnableTcpNoDelayByDefault()) { try { setTcpNoDelay(true); } catch (Exception e) { // Ignore. } } } @Override public Map<ChannelOption<?>, Object> getOptions() { return getOptions(super.getOptions(), SO_RCVBUF, SO_SNDBUF, TCP_NODELAY, SO_KEEPALIVE, SO_REUSEADDR, SO_LINGER, IP_TOS, ALLOW_HALF_CLOSURE); } @SuppressWarnings("unchecked") @Override public <T> T getOption(ChannelOption<T> option) { if (option == SO_RCVBUF) { return (T) Integer.valueOf(getReceiveBufferSize()); } if (option == SO_SNDBUF) { return (T) Integer.valueOf(getSendBufferSize()); } if (option == TCP_NODELAY) { return (T) Boolean.valueOf(isTcpNoDelay()); } if (option == SO_KEEPALIVE) { return (T) Boolean.valueOf(isKeepAlive()); } if (option == SO_REUSEADDR) { return (T) Boolean.valueOf(isReuseAddress()); } if (option == SO_LINGER) { return (T) Integer.valueOf(getSoLinger()); } if (option == IP_TOS) { return (T) Integer.valueOf(getTrafficClass()); } if (option == ALLOW_HALF_CLOSURE) { return (T) Boolean.valueOf(isAllowHalfClosure()); } return super.getOption(option); } @Override public <T> boolean setOption(ChannelOption<T> option, T value) { validate(option, value); if (option == SO_RCVBUF) { setReceiveBufferSize((Integer) value); } else if (option == SO_SNDBUF) { setSendBufferSize((Integer) value); } else if (option == TCP_NODELAY) { setTcpNoDelay((Boolean) value); } else if (option == SO_KEEPALIVE) { setKeepAlive((Boolean) value); } else if (option == SO_REUSEADDR) { setReuseAddress((Boolean) value); } else if (option == SO_LINGER) { setSoLinger((Integer) value); } else if (option == IP_TOS) { setTrafficClass((Integer) value); } else if (option == ALLOW_HALF_CLOSURE) { setAllowHalfClosure((Boolean) value); } else { return super.setOption(option, value); } return true; } @Override public int getReceiveBufferSize() { try { return javaSocket.getReceiveBufferSize(); } catch (SocketException e) { throw new ChannelException(e); } } @Override public int getSendBufferSize() { try { return javaSocket.getSendBufferSize(); } catch (SocketException e) { throw new ChannelException(e); } } @Override public int getSoLinger() { try { return javaSocket.getSoLinger(); } catch (SocketException e) { throw new ChannelException(e); } } @Override public int getTrafficClass() { try { return javaSocket.getTrafficClass(); } catch (SocketException e) { throw new ChannelException(e); } } @Override public boolean isKeepAlive() { try { return javaSocket.getKeepAlive(); } catch (SocketException e) { throw new ChannelException(e); } } @Override public boolean isReuseAddress() { try { return javaSocket.getReuseAddress(); } catch (SocketException e) { throw new ChannelException(e); } } @Override public boolean isTcpNoDelay() { try { return javaSocket.getTcpNoDelay(); } catch (SocketException e) { throw new ChannelException(e); } } @Override public SocketChannelConfig setKeepAlive(boolean keepAlive) { try { javaSocket.setKeepAlive(keepAlive); } catch (SocketException e) { throw new ChannelException(e); } return this; } @Override public SocketChannelConfig setPerformancePreferences(int connectionTime, int latency, int bandwidth) { javaSocket.setPerformancePreferences(connectionTime, latency, bandwidth); return this; } @Override public SocketChannelConfig setReceiveBufferSize(int receiveBufferSize) { try { javaSocket.setReceiveBufferSize(receiveBufferSize); } catch (SocketException e) { throw new ChannelException(e); } return this; } @Override public SocketChannelConfig setReuseAddress(boolean reuseAddress) { try { javaSocket.setReuseAddress(reuseAddress); } catch (SocketException e) { throw new ChannelException(e); } return this; } @Override public SocketChannelConfig setSendBufferSize(int sendBufferSize) { try { javaSocket.setSendBufferSize(sendBufferSize); } catch (SocketException e) { throw new ChannelException(e); } return this; } @Override public SocketChannelConfig setSoLinger(int soLinger) { try { if (soLinger < 0) { javaSocket.setSoLinger(false, 0); } else { javaSocket.setSoLinger(true, soLinger); } } catch (SocketException e) { throw new ChannelException(e); } return this; } @Override public SocketChannelConfig setTcpNoDelay(boolean tcpNoDelay) { try { javaSocket.setTcpNoDelay(tcpNoDelay); } catch (SocketException e) { throw new ChannelException(e); } return this; } @Override public SocketChannelConfig setTrafficClass(int trafficClass) { try { javaSocket.setTrafficClass(trafficClass); } catch (SocketException e) { throw new ChannelException(e); } return this; } @Override public boolean isAllowHalfClosure() { return allowHalfClosure; } @Override public SocketChannelConfig setAllowHalfClosure(boolean allowHalfClosure) { this.allowHalfClosure = allowHalfClosure; return this; } @Override public SocketChannelConfig setConnectTimeoutMillis(int connectTimeoutMillis) { super.setConnectTimeoutMillis(connectTimeoutMillis); return this; } @Override @Deprecated public SocketChannelConfig setMaxMessagesPerRead(int maxMessagesPerRead) { super.setMaxMessagesPerRead(maxMessagesPerRead); return this; } @Override public SocketChannelConfig setWriteSpinCount(int writeSpinCount) { super.setWriteSpinCount(writeSpinCount); return this; } @Override public SocketChannelConfig setAllocator(ByteBufAllocator allocator) { super.setAllocator(allocator); return this; } @Override public SocketChannelConfig setRecvByteBufAllocator(RecvByteBufAllocator allocator) { super.setRecvByteBufAllocator(allocator); return this; } @Override public SocketChannelConfig setAutoRead(boolean autoRead) { super.setAutoRead(autoRead); return this; } @Override public SocketChannelConfig setAutoClose(boolean autoClose) { super.setAutoClose(autoClose); return this; } @Override public SocketChannelConfig setWriteBufferHighWaterMark(int writeBufferHighWaterMark) { super.setWriteBufferHighWaterMark(writeBufferHighWaterMark); return this; } @Override public SocketChannelConfig setWriteBufferLowWaterMark(int writeBufferLowWaterMark) { super.setWriteBufferLowWaterMark(writeBufferLowWaterMark); return this; } @Override public SocketChannelConfig setWriteBufferWaterMark(WriteBufferWaterMark writeBufferWaterMark) { super.setWriteBufferWaterMark(writeBufferWaterMark); return this; } @Override public SocketChannelConfig setMessageSizeEstimator(MessageSizeEstimator estimator) { super.setMessageSizeEstimator(estimator); return this; } }