7becfc5e06
Motivation: We should use OneTimeTask where possible to reduce object creation. Modifications: Replace Runnable with OneTimeTask Result: Less object creation
466 lines
15 KiB
Java
Executable File
466 lines
15 KiB
Java
Executable File
/*
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* Copyright 2012 The Netty Project
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*
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* The Netty Project licenses this file to you under the Apache License,
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* version 2.0 (the "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*/
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package io.netty.channel.sctp.oio;
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import com.sun.nio.sctp.Association;
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import com.sun.nio.sctp.MessageInfo;
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import com.sun.nio.sctp.NotificationHandler;
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import com.sun.nio.sctp.SctpChannel;
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import io.netty.buffer.ByteBuf;
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import io.netty.channel.Channel;
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import io.netty.channel.ChannelException;
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import io.netty.channel.ChannelFuture;
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import io.netty.channel.ChannelMetadata;
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import io.netty.channel.ChannelOutboundBuffer;
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import io.netty.channel.ChannelPromise;
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import io.netty.channel.RecvByteBufAllocator;
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import io.netty.channel.oio.AbstractOioMessageChannel;
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import io.netty.channel.sctp.DefaultSctpChannelConfig;
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import io.netty.channel.sctp.SctpChannelConfig;
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import io.netty.channel.sctp.SctpMessage;
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import io.netty.channel.sctp.SctpNotificationHandler;
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import io.netty.channel.sctp.SctpServerChannel;
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import io.netty.util.internal.OneTimeTask;
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import io.netty.util.internal.PlatformDependent;
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import io.netty.util.internal.StringUtil;
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import io.netty.util.internal.logging.InternalLogger;
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import io.netty.util.internal.logging.InternalLoggerFactory;
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import java.io.IOException;
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import java.net.InetAddress;
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import java.net.InetSocketAddress;
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import java.net.SocketAddress;
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import java.nio.ByteBuffer;
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import java.nio.channels.SelectionKey;
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import java.nio.channels.Selector;
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import java.util.Collections;
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import java.util.Iterator;
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import java.util.LinkedHashSet;
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import java.util.List;
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import java.util.Set;
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/**
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* {@link io.netty.channel.sctp.SctpChannel} implementation which use blocking mode and allows to read / write
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* {@link SctpMessage}s to the underlying {@link SctpChannel}.
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*
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* Be aware that not all operations systems support SCTP. Please refer to the documentation of your operation system,
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* to understand what you need to do to use it. Also this feature is only supported on Java 7+.
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*/
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public class OioSctpChannel extends AbstractOioMessageChannel
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implements io.netty.channel.sctp.SctpChannel {
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private static final InternalLogger logger =
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InternalLoggerFactory.getInstance(OioSctpChannel.class);
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private static final ChannelMetadata METADATA = new ChannelMetadata(false);
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private static final String EXPECTED_TYPE = " (expected: " + StringUtil.simpleClassName(SctpMessage.class) + ')';
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private final SctpChannel ch;
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private final SctpChannelConfig config;
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private final Selector readSelector;
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private final Selector writeSelector;
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private final Selector connectSelector;
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private final NotificationHandler<?> notificationHandler;
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private static SctpChannel openChannel() {
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try {
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return SctpChannel.open();
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} catch (IOException e) {
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throw new ChannelException("Failed to open a sctp channel.", e);
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}
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}
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/**
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* Create a new instance with an new {@link SctpChannel}.
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*/
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public OioSctpChannel() {
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this(openChannel());
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}
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/**
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* Create a new instance from the given {@link SctpChannel}.
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*
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* @param ch the {@link SctpChannel} which is used by this instance
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*/
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public OioSctpChannel(SctpChannel ch) {
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this(null, ch);
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}
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/**
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* Create a new instance from the given {@link SctpChannel}.
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*
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* @param parent the parent {@link Channel} which was used to create this instance. This can be null if the
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* {@link} has no parent as it was created by your self.
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* @param ch the {@link SctpChannel} which is used by this instance
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*/
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public OioSctpChannel(Channel parent, SctpChannel ch) {
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super(parent);
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this.ch = ch;
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boolean success = false;
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try {
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ch.configureBlocking(false);
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readSelector = Selector.open();
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writeSelector = Selector.open();
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connectSelector = Selector.open();
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ch.register(readSelector, SelectionKey.OP_READ);
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ch.register(writeSelector, SelectionKey.OP_WRITE);
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ch.register(connectSelector, SelectionKey.OP_CONNECT);
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config = new OioSctpChannelConfig(this, ch);
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notificationHandler = new SctpNotificationHandler(this);
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success = true;
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} catch (Exception e) {
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throw new ChannelException("failed to initialize a sctp channel", e);
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} finally {
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if (!success) {
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try {
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ch.close();
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} catch (IOException e) {
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logger.warn("Failed to close a sctp channel.", e);
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}
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}
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}
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}
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@Override
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public InetSocketAddress localAddress() {
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return (InetSocketAddress) super.localAddress();
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}
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@Override
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public InetSocketAddress remoteAddress() {
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return (InetSocketAddress) super.remoteAddress();
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}
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@Override
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public SctpServerChannel parent() {
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return (SctpServerChannel) super.parent();
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}
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@Override
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public ChannelMetadata metadata() {
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return METADATA;
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}
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@Override
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public SctpChannelConfig config() {
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return config;
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}
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@Override
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public boolean isOpen() {
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return ch.isOpen();
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}
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@Override
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protected int doReadMessages(List<Object> msgs) throws Exception {
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if (!readSelector.isOpen()) {
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return 0;
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}
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int readMessages = 0;
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final int selectedKeys = readSelector.select(SO_TIMEOUT);
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final boolean keysSelected = selectedKeys > 0;
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if (!keysSelected) {
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return readMessages;
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}
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final RecvByteBufAllocator.Handle allocHandle = unsafe().recvBufAllocHandle();
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ByteBuf buffer = allocHandle.allocate(config().getAllocator());
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boolean free = true;
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try {
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ByteBuffer data = buffer.nioBuffer(buffer.writerIndex(), buffer.writableBytes());
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MessageInfo messageInfo = ch.receive(data, null, notificationHandler);
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if (messageInfo == null) {
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return readMessages;
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}
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data.flip();
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allocHandle.lastBytesRead(data.remaining());
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msgs.add(new SctpMessage(messageInfo,
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buffer.writerIndex(buffer.writerIndex() + allocHandle.lastBytesRead())));
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free = false;
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++readMessages;
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} catch (Throwable cause) {
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PlatformDependent.throwException(cause);
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} finally {
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if (free) {
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buffer.release();
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}
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}
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return readMessages;
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}
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@Override
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protected void doWrite(ChannelOutboundBuffer in) throws Exception {
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if (!writeSelector.isOpen()) {
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return;
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}
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final int size = in.size();
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final int selectedKeys = writeSelector.select(SO_TIMEOUT);
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if (selectedKeys > 0) {
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final Set<SelectionKey> writableKeys = writeSelector.selectedKeys();
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if (writableKeys.isEmpty()) {
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return;
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}
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Iterator<SelectionKey> writableKeysIt = writableKeys.iterator();
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int written = 0;
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for (;;) {
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if (written == size) {
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// all written
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return;
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}
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writableKeysIt.next();
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writableKeysIt.remove();
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SctpMessage packet = (SctpMessage) in.current();
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if (packet == null) {
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return;
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}
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ByteBuf data = packet.content();
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int dataLen = data.readableBytes();
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ByteBuffer nioData;
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if (data.nioBufferCount() != -1) {
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nioData = data.nioBuffer();
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} else {
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nioData = ByteBuffer.allocate(dataLen);
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data.getBytes(data.readerIndex(), nioData);
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nioData.flip();
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}
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final MessageInfo mi = MessageInfo.createOutgoing(association(), null, packet.streamIdentifier());
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mi.payloadProtocolID(packet.protocolIdentifier());
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mi.streamNumber(packet.streamIdentifier());
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mi.unordered(packet.isUnordered());
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ch.send(nioData, mi);
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written ++;
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in.remove();
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if (!writableKeysIt.hasNext()) {
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return;
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}
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}
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}
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}
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@Override
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protected Object filterOutboundMessage(Object msg) throws Exception {
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if (msg instanceof SctpMessage) {
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return msg;
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}
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throw new UnsupportedOperationException(
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"unsupported message type: " + StringUtil.simpleClassName(msg) + EXPECTED_TYPE);
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}
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@Override
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public Association association() {
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try {
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return ch.association();
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} catch (IOException ignored) {
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return null;
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}
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}
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@Override
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public boolean isActive() {
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return isOpen() && association() != null;
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}
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@Override
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protected SocketAddress localAddress0() {
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try {
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Iterator<SocketAddress> i = ch.getAllLocalAddresses().iterator();
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if (i.hasNext()) {
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return i.next();
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}
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} catch (IOException e) {
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// ignore
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}
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return null;
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}
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@Override
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public Set<InetSocketAddress> allLocalAddresses() {
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try {
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final Set<SocketAddress> allLocalAddresses = ch.getAllLocalAddresses();
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final Set<InetSocketAddress> addresses = new LinkedHashSet<InetSocketAddress>(allLocalAddresses.size());
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for (SocketAddress socketAddress : allLocalAddresses) {
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addresses.add((InetSocketAddress) socketAddress);
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}
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return addresses;
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} catch (Throwable ignored) {
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return Collections.emptySet();
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}
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}
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@Override
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protected SocketAddress remoteAddress0() {
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try {
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Iterator<SocketAddress> i = ch.getRemoteAddresses().iterator();
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if (i.hasNext()) {
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return i.next();
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}
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} catch (IOException e) {
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// ignore
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}
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return null;
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}
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@Override
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public Set<InetSocketAddress> allRemoteAddresses() {
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try {
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final Set<SocketAddress> allLocalAddresses = ch.getRemoteAddresses();
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final Set<InetSocketAddress> addresses = new LinkedHashSet<InetSocketAddress>(allLocalAddresses.size());
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for (SocketAddress socketAddress : allLocalAddresses) {
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addresses.add((InetSocketAddress) socketAddress);
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}
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return addresses;
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} catch (Throwable ignored) {
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return Collections.emptySet();
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}
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}
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@Override
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protected void doBind(SocketAddress localAddress) throws Exception {
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ch.bind(localAddress);
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}
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@Override
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protected void doConnect(SocketAddress remoteAddress,
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SocketAddress localAddress) throws Exception {
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if (localAddress != null) {
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ch.bind(localAddress);
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}
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boolean success = false;
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try {
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ch.connect(remoteAddress);
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boolean finishConnect = false;
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while (!finishConnect) {
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if (connectSelector.select(SO_TIMEOUT) >= 0) {
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final Set<SelectionKey> selectionKeys = connectSelector.selectedKeys();
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for (SelectionKey key : selectionKeys) {
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if (key.isConnectable()) {
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selectionKeys.clear();
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finishConnect = true;
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break;
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}
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}
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selectionKeys.clear();
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}
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}
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success = ch.finishConnect();
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} finally {
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if (!success) {
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doClose();
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}
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}
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}
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@Override
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protected void doDisconnect() throws Exception {
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doClose();
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}
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@Override
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protected void doClose() throws Exception {
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closeSelector("read", readSelector);
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closeSelector("write", writeSelector);
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closeSelector("connect", connectSelector);
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ch.close();
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}
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private static void closeSelector(String selectorName, Selector selector) {
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try {
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selector.close();
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} catch (IOException e) {
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logger.warn("Failed to close a " + selectorName + " selector.", e);
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}
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}
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@Override
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public ChannelFuture bindAddress(InetAddress localAddress) {
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return bindAddress(localAddress, newPromise());
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}
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@Override
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public ChannelFuture bindAddress(final InetAddress localAddress, final ChannelPromise promise) {
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if (eventLoop().inEventLoop()) {
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try {
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ch.bindAddress(localAddress);
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promise.setSuccess();
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} catch (Throwable t) {
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promise.setFailure(t);
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}
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} else {
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eventLoop().execute(new OneTimeTask() {
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@Override
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public void run() {
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bindAddress(localAddress, promise);
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}
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});
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}
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return promise;
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}
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@Override
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public ChannelFuture unbindAddress(InetAddress localAddress) {
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return unbindAddress(localAddress, newPromise());
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}
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@Override
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public ChannelFuture unbindAddress(final InetAddress localAddress, final ChannelPromise promise) {
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if (eventLoop().inEventLoop()) {
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try {
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ch.unbindAddress(localAddress);
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promise.setSuccess();
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} catch (Throwable t) {
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promise.setFailure(t);
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}
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} else {
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eventLoop().execute(new OneTimeTask() {
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@Override
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public void run() {
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unbindAddress(localAddress, promise);
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}
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});
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}
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return promise;
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}
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private final class OioSctpChannelConfig extends DefaultSctpChannelConfig {
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private OioSctpChannelConfig(OioSctpChannel channel, SctpChannel javaChannel) {
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super(channel, javaChannel);
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}
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@Override
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protected void autoReadCleared() {
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setReadPending(false);
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}
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}
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}
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