7becfc5e06
Motivation: We should use OneTimeTask where possible to reduce object creation. Modifications: Replace Runnable with OneTimeTask Result: Less object creation
310 lines
9.5 KiB
Java
Executable File
310 lines
9.5 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.SctpChannel;
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import com.sun.nio.sctp.SctpServerChannel;
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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.oio.AbstractOioMessageChannel;
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import io.netty.channel.sctp.DefaultSctpServerChannelConfig;
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import io.netty.channel.sctp.SctpServerChannelConfig;
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import io.netty.util.internal.OneTimeTask;
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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.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.SctpServerChannel} implementation which use blocking mode to accept new
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* connections and create the {@link OioSctpChannel} for them.
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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 OioSctpServerChannel extends AbstractOioMessageChannel
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implements io.netty.channel.sctp.SctpServerChannel {
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private static final InternalLogger logger =
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InternalLoggerFactory.getInstance(OioSctpServerChannel.class);
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private static final ChannelMetadata METADATA = new ChannelMetadata(false, 16);
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private static SctpServerChannel newServerSocket() {
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try {
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return SctpServerChannel.open();
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} catch (IOException e) {
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throw new ChannelException("failed to create a sctp server channel", e);
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}
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}
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private final SctpServerChannel sch;
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private final SctpServerChannelConfig config;
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private final Selector selector;
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/**
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* Create a new instance with an new {@link SctpServerChannel}
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*/
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public OioSctpServerChannel() {
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this(newServerSocket());
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}
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/**
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* Create a new instance from the given {@link SctpServerChannel}
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*
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* @param sch the {@link SctpServerChannel} which is used by this instance
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*/
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public OioSctpServerChannel(SctpServerChannel sch) {
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super(null);
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if (sch == null) {
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throw new NullPointerException("sctp server channel");
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}
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this.sch = sch;
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boolean success = false;
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try {
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sch.configureBlocking(false);
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selector = Selector.open();
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sch.register(selector, SelectionKey.OP_ACCEPT);
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config = new OioSctpServerChannelConfig(this, sch);
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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 server channel", e);
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} finally {
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if (!success) {
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try {
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sch.close();
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} catch (IOException e) {
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logger.warn("Failed to close a sctp server 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 ChannelMetadata metadata() {
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return METADATA;
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}
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@Override
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public SctpServerChannelConfig config() {
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return config;
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}
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@Override
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public InetSocketAddress remoteAddress() {
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return null;
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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 boolean isOpen() {
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return sch.isOpen();
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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 = sch.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 = sch.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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public boolean isActive() {
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return isOpen() && localAddress0() != null;
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}
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@Override
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protected void doBind(SocketAddress localAddress) throws Exception {
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sch.bind(localAddress, config.getBacklog());
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}
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@Override
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protected void doClose() throws Exception {
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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 selector.", e);
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}
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sch.close();
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}
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@Override
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protected int doReadMessages(List<Object> buf) throws Exception {
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if (!isActive()) {
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return -1;
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}
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SctpChannel s = null;
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int acceptedChannels = 0;
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try {
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final int selectedKeys = selector.select(SO_TIMEOUT);
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if (selectedKeys > 0) {
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final Iterator<SelectionKey> selectionKeys = selector.selectedKeys().iterator();
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for (;;) {
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SelectionKey key = selectionKeys.next();
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selectionKeys.remove();
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if (key.isAcceptable()) {
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s = sch.accept();
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if (s != null) {
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buf.add(new OioSctpChannel(this, s));
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acceptedChannels ++;
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}
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}
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if (!selectionKeys.hasNext()) {
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return acceptedChannels;
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}
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}
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}
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} catch (Throwable t) {
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logger.warn("Failed to create a new channel from an accepted sctp channel.", t);
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if (s != null) {
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try {
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s.close();
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} catch (Throwable t2) {
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logger.warn("Failed to close a sctp channel.", t2);
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}
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}
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}
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return acceptedChannels;
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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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sch.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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sch.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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@Override
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protected void doConnect(
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SocketAddress remoteAddress, SocketAddress localAddress) throws Exception {
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throw new UnsupportedOperationException();
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}
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@Override
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protected SocketAddress remoteAddress0() {
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return null;
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}
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@Override
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protected void doDisconnect() throws Exception {
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throw new UnsupportedOperationException();
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}
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@Override
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protected void doWrite(ChannelOutboundBuffer in) throws Exception {
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throw new UnsupportedOperationException();
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}
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@Override
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protected Object filterOutboundMessage(Object msg) throws Exception {
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throw new UnsupportedOperationException();
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}
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private final class OioSctpServerChannelConfig extends DefaultSctpServerChannelConfig {
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private OioSctpServerChannelConfig(OioSctpServerChannel channel, SctpServerChannel 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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