io.netty.channel.socket.nio.SelectorProviderUtil Maven / Gradle / Ivy
/*
* Copyright 2022 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 io.netty.channel.socket.nio;
import io.netty.channel.socket.InternetProtocolFamily;
import io.netty.util.internal.PlatformDependent;
import io.netty.util.internal.SuppressJava6Requirement;
import io.netty.util.internal.logging.InternalLogger;
import io.netty.util.internal.logging.InternalLoggerFactory;
import java.io.IOException;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.nio.channels.Channel;
import java.nio.channels.SocketChannel;
import java.nio.channels.spi.SelectorProvider;
final class SelectorProviderUtil {
private static final InternalLogger logger = InternalLoggerFactory.getInstance(SelectorProviderUtil.class);
@SuppressJava6Requirement(reason = "Usage guarded by java version check")
static Method findOpenMethod(String methodName) {
if (PlatformDependent.javaVersion() >= 15) {
try {
return SelectorProvider.class.getMethod(methodName, java.net.ProtocolFamily.class);
} catch (Throwable e) {
logger.debug("SelectorProvider.{}(ProtocolFamily) not available, will use default", methodName, e);
}
}
return null;
}
@SuppressJava6Requirement(reason = "Usage guarded by java version check")
static C newChannel(Method method, SelectorProvider provider,
InternetProtocolFamily family) throws IOException {
/**
* Use the {@link SelectorProvider} to open {@link SocketChannel} and so remove condition in
* {@link SelectorProvider#provider()} which is called by each SocketChannel.open() otherwise.
*
* See #2308.
*/
if (family != null && method != null) {
try {
@SuppressWarnings("unchecked")
C channel = (C) method.invoke(
provider, ProtocolFamilyConverter.convert(family));
return channel;
} catch (InvocationTargetException e) {
throw new IOException(e);
} catch (IllegalAccessException e) {
throw new IOException(e);
}
}
return null;
}
private SelectorProviderUtil() { }
}