forked from netty/netty
/
EpollChannelConfig.java
194 lines (168 loc) · 6.33 KB
/
EpollChannelConfig.java
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/*
* Copyright 2015 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.epoll;
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 java.io.IOException;
import java.util.Map;
import static io.netty.channel.unix.Limits.SSIZE_MAX;
public class EpollChannelConfig extends DefaultChannelConfig {
private volatile long maxBytesPerGatheringWrite = SSIZE_MAX;
EpollChannelConfig(AbstractEpollChannel channel) {
super(channel);
}
EpollChannelConfig(AbstractEpollChannel channel, RecvByteBufAllocator recvByteBufAllocator) {
super(channel, recvByteBufAllocator);
}
@Override
public Map<ChannelOption<?>, Object> getOptions() {
return getOptions(super.getOptions(), EpollChannelOption.EPOLL_MODE);
}
@SuppressWarnings("unchecked")
@Override
public <T> T getOption(ChannelOption<T> option) {
if (option == EpollChannelOption.EPOLL_MODE) {
return (T) getEpollMode();
}
return super.getOption(option);
}
@Override
public <T> boolean setOption(ChannelOption<T> option, T value) {
validate(option, value);
if (option == EpollChannelOption.EPOLL_MODE) {
setEpollMode((EpollMode) value);
} else {
return super.setOption(option, value);
}
return true;
}
@Override
public EpollChannelConfig setConnectTimeoutMillis(int connectTimeoutMillis) {
super.setConnectTimeoutMillis(connectTimeoutMillis);
return this;
}
@Override
@Deprecated
public EpollChannelConfig setMaxMessagesPerRead(int maxMessagesPerRead) {
super.setMaxMessagesPerRead(maxMessagesPerRead);
return this;
}
@Override
public EpollChannelConfig setWriteSpinCount(int writeSpinCount) {
super.setWriteSpinCount(writeSpinCount);
return this;
}
@Override
public EpollChannelConfig setAllocator(ByteBufAllocator allocator) {
super.setAllocator(allocator);
return this;
}
@Override
public EpollChannelConfig setRecvByteBufAllocator(RecvByteBufAllocator allocator) {
if (!(allocator.newHandle() instanceof RecvByteBufAllocator.ExtendedHandle)) {
throw new IllegalArgumentException("allocator.newHandle() must return an object of type: " +
RecvByteBufAllocator.ExtendedHandle.class);
}
super.setRecvByteBufAllocator(allocator);
return this;
}
@Override
public EpollChannelConfig setAutoRead(boolean autoRead) {
super.setAutoRead(autoRead);
return this;
}
@Override
@Deprecated
public EpollChannelConfig setWriteBufferHighWaterMark(int writeBufferHighWaterMark) {
super.setWriteBufferHighWaterMark(writeBufferHighWaterMark);
return this;
}
@Override
@Deprecated
public EpollChannelConfig setWriteBufferLowWaterMark(int writeBufferLowWaterMark) {
super.setWriteBufferLowWaterMark(writeBufferLowWaterMark);
return this;
}
@Override
public EpollChannelConfig setWriteBufferWaterMark(WriteBufferWaterMark writeBufferWaterMark) {
super.setWriteBufferWaterMark(writeBufferWaterMark);
return this;
}
@Override
public EpollChannelConfig setMessageSizeEstimator(MessageSizeEstimator estimator) {
super.setMessageSizeEstimator(estimator);
return this;
}
/**
* Return the {@link EpollMode} used. Default is
* {@link EpollMode#EDGE_TRIGGERED}. If you want to use {@link #isAutoRead()} {@code false} or
* {@link #getMaxMessagesPerRead()} and have an accurate behaviour you should use
* {@link EpollMode#LEVEL_TRIGGERED}.
*/
public EpollMode getEpollMode() {
return ((AbstractEpollChannel) channel).isFlagSet(Native.EPOLLET)
? EpollMode.EDGE_TRIGGERED : EpollMode.LEVEL_TRIGGERED;
}
/**
* Set the {@link EpollMode} used. Default is
* {@link EpollMode#EDGE_TRIGGERED}. If you want to use {@link #isAutoRead()} {@code false} or
* {@link #getMaxMessagesPerRead()} and have an accurate behaviour you should use
* {@link EpollMode#LEVEL_TRIGGERED}.
*
* <strong>Be aware this config setting can only be adjusted before the channel was registered.</strong>
*/
public EpollChannelConfig setEpollMode(EpollMode mode) {
ObjectUtil.checkNotNull(mode, "mode");
try {
switch (mode) {
case EDGE_TRIGGERED:
checkChannelNotRegistered();
((AbstractEpollChannel) channel).setFlag(Native.EPOLLET);
break;
case LEVEL_TRIGGERED:
checkChannelNotRegistered();
((AbstractEpollChannel) channel).clearFlag(Native.EPOLLET);
break;
default:
throw new Error();
}
} catch (IOException e) {
throw new ChannelException(e);
}
return this;
}
private void checkChannelNotRegistered() {
if (channel.isRegistered()) {
throw new IllegalStateException("EpollMode can only be changed before channel is registered");
}
}
@Override
protected final void autoReadCleared() {
((AbstractEpollChannel) channel).clearEpollIn();
}
final void setMaxBytesPerGatheringWrite(long maxBytesPerGatheringWrite) {
this.maxBytesPerGatheringWrite = maxBytesPerGatheringWrite;
}
final long getMaxBytesPerGatheringWrite() {
return maxBytesPerGatheringWrite;
}
}