com.datastax.oss.driver.shaded.netty.channel.socket.nio.NioDatagramChannelConfig Maven / Gradle / Ivy
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/*
* 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:
*
* https://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 com.datastax.oss.driver.shaded.netty.channel.socket.nio;
import com.datastax.oss.driver.shaded.netty.channel.ChannelException;
import com.datastax.oss.driver.shaded.netty.channel.ChannelOption;
import com.datastax.oss.driver.shaded.netty.channel.socket.DatagramChannelConfig;
import com.datastax.oss.driver.shaded.netty.channel.socket.DefaultDatagramChannelConfig;
import com.datastax.oss.driver.shaded.netty.util.internal.PlatformDependent;
import com.datastax.oss.driver.shaded.netty.util.internal.SocketUtils;
import java.lang.reflect.Method;
import java.net.InetAddress;
import java.net.NetworkInterface;
import java.net.SocketException;
import java.nio.channels.DatagramChannel;
import java.util.Enumeration;
import java.util.Map;
/**
* The default {@link NioDatagramChannelConfig} implementation.
*/
class NioDatagramChannelConfig extends DefaultDatagramChannelConfig {
private static final Object IP_MULTICAST_TTL;
private static final Object IP_MULTICAST_IF;
private static final Object IP_MULTICAST_LOOP;
private static final Method GET_OPTION;
private static final Method SET_OPTION;
static {
ClassLoader classLoader = PlatformDependent.getClassLoader(DatagramChannel.class);
Class socketOptionType = null;
try {
socketOptionType = Class.forName("java.net.SocketOption", true, classLoader);
} catch (Exception e) {
// Not Java 7+
}
Class stdSocketOptionType = null;
try {
stdSocketOptionType = Class.forName("java.net.StandardSocketOptions", true, classLoader);
} catch (Exception e) {
// Not Java 7+
}
Object ipMulticastTtl = null;
Object ipMulticastIf = null;
Object ipMulticastLoop = null;
Method getOption = null;
Method setOption = null;
if (socketOptionType != null) {
try {
ipMulticastTtl = stdSocketOptionType.getDeclaredField("IP_MULTICAST_TTL").get(null);
} catch (Exception e) {
throw new Error("cannot locate the IP_MULTICAST_TTL field", e);
}
try {
ipMulticastIf = stdSocketOptionType.getDeclaredField("IP_MULTICAST_IF").get(null);
} catch (Exception e) {
throw new Error("cannot locate the IP_MULTICAST_IF field", e);
}
try {
ipMulticastLoop = stdSocketOptionType.getDeclaredField("IP_MULTICAST_LOOP").get(null);
} catch (Exception e) {
throw new Error("cannot locate the IP_MULTICAST_LOOP field", e);
}
Class networkChannelClass = null;
try {
networkChannelClass = Class.forName("java.nio.channels.NetworkChannel", true, classLoader);
} catch (Throwable ignore) {
// Not Java 7+
}
if (networkChannelClass == null) {
getOption = null;
setOption = null;
} else {
try {
getOption = networkChannelClass.getDeclaredMethod("getOption", socketOptionType);
} catch (Exception e) {
throw new Error("cannot locate the getOption() method", e);
}
try {
setOption = networkChannelClass.getDeclaredMethod("setOption", socketOptionType, Object.class);
} catch (Exception e) {
throw new Error("cannot locate the setOption() method", e);
}
}
}
IP_MULTICAST_TTL = ipMulticastTtl;
IP_MULTICAST_IF = ipMulticastIf;
IP_MULTICAST_LOOP = ipMulticastLoop;
GET_OPTION = getOption;
SET_OPTION = setOption;
}
private final DatagramChannel javaChannel;
NioDatagramChannelConfig(NioDatagramChannel channel, DatagramChannel javaChannel) {
super(channel, javaChannel.socket());
this.javaChannel = javaChannel;
}
@Override
public int getTimeToLive() {
return (Integer) getOption0(IP_MULTICAST_TTL);
}
@Override
public DatagramChannelConfig setTimeToLive(int ttl) {
setOption0(IP_MULTICAST_TTL, ttl);
return this;
}
@Override
public InetAddress getInterface() {
NetworkInterface inf = getNetworkInterface();
if (inf != null) {
Enumeration addresses = SocketUtils.addressesFromNetworkInterface(inf);
if (addresses.hasMoreElements()) {
return addresses.nextElement();
}
}
return null;
}
@Override
public DatagramChannelConfig setInterface(InetAddress interfaceAddress) {
try {
setNetworkInterface(NetworkInterface.getByInetAddress(interfaceAddress));
} catch (SocketException e) {
throw new ChannelException(e);
}
return this;
}
@Override
public NetworkInterface getNetworkInterface() {
return (NetworkInterface) getOption0(IP_MULTICAST_IF);
}
@Override
public DatagramChannelConfig setNetworkInterface(NetworkInterface networkInterface) {
setOption0(IP_MULTICAST_IF, networkInterface);
return this;
}
@Override
public boolean isLoopbackModeDisabled() {
return (Boolean) getOption0(IP_MULTICAST_LOOP);
}
@Override
public DatagramChannelConfig setLoopbackModeDisabled(boolean loopbackModeDisabled) {
setOption0(IP_MULTICAST_LOOP, loopbackModeDisabled);
return this;
}
@Override
public DatagramChannelConfig setAutoRead(boolean autoRead) {
super.setAutoRead(autoRead);
return this;
}
@Override
protected void autoReadCleared() {
((NioDatagramChannel) channel).clearReadPending0();
}
private Object getOption0(Object option) {
if (GET_OPTION == null) {
throw new UnsupportedOperationException();
} else {
try {
return GET_OPTION.invoke(javaChannel, option);
} catch (Exception e) {
throw new ChannelException(e);
}
}
}
private void setOption0(Object option, Object value) {
if (SET_OPTION == null) {
throw new UnsupportedOperationException();
} else {
try {
SET_OPTION.invoke(javaChannel, option, value);
} catch (Exception e) {
throw new ChannelException(e);
}
}
}
@Override
public boolean setOption(ChannelOption option, T value) {
if (PlatformDependent.javaVersion() >= 7 && option instanceof NioChannelOption) {
return NioChannelOption.setOption(javaChannel, (NioChannelOption) option, value);
}
return super.setOption(option, value);
}
@Override
public T getOption(ChannelOption option) {
if (PlatformDependent.javaVersion() >= 7 && option instanceof NioChannelOption) {
return NioChannelOption.getOption(javaChannel, (NioChannelOption) option);
}
return super.getOption(option);
}
@SuppressWarnings("unchecked")
@Override
public Map, Object> getOptions() {
if (PlatformDependent.javaVersion() >= 7) {
return getOptions(super.getOptions(), NioChannelOption.getOptions(javaChannel));
}
return super.getOptions();
}
}