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io.netty.channel.DefaultChannelConfig Maven / Gradle / Ivy
/*
* 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:
*
* http://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;
import io.netty.buffer.ByteBufAllocator;
import java.util.IdentityHashMap;
import java.util.Map;
import java.util.Map.Entry;
import java.util.concurrent.atomic.AtomicIntegerFieldUpdater;
import java.util.concurrent.atomic.AtomicReferenceFieldUpdater;
import static io.netty.channel.ChannelOption.ALLOCATOR;
import static io.netty.channel.ChannelOption.AUTO_CLOSE;
import static io.netty.channel.ChannelOption.AUTO_READ;
import static io.netty.channel.ChannelOption.CONNECT_TIMEOUT_MILLIS;
import static io.netty.channel.ChannelOption.MAX_MESSAGES_PER_READ;
import static io.netty.channel.ChannelOption.MESSAGE_SIZE_ESTIMATOR;
import static io.netty.channel.ChannelOption.RCVBUF_ALLOCATOR;
import static io.netty.channel.ChannelOption.SINGLE_EVENTEXECUTOR_PER_GROUP;
import static io.netty.channel.ChannelOption.WRITE_BUFFER_HIGH_WATER_MARK;
import static io.netty.channel.ChannelOption.WRITE_BUFFER_LOW_WATER_MARK;
import static io.netty.channel.ChannelOption.WRITE_BUFFER_WATER_MARK;
import static io.netty.channel.ChannelOption.WRITE_SPIN_COUNT;
import static io.netty.util.internal.ObjectUtil.checkNotNull;
/**
* The default {@link ChannelConfig} implementation.
*/
public class DefaultChannelConfig implements ChannelConfig {
private static final MessageSizeEstimator DEFAULT_MSG_SIZE_ESTIMATOR = DefaultMessageSizeEstimator.DEFAULT;
private static final int DEFAULT_CONNECT_TIMEOUT = 30000;
private static final AtomicIntegerFieldUpdater AUTOREAD_UPDATER =
AtomicIntegerFieldUpdater.newUpdater(DefaultChannelConfig.class, "autoRead");
private static final AtomicReferenceFieldUpdater WATERMARK_UPDATER =
AtomicReferenceFieldUpdater.newUpdater(
DefaultChannelConfig.class, WriteBufferWaterMark.class, "writeBufferWaterMark");
protected final Channel channel;
private volatile ByteBufAllocator allocator = ByteBufAllocator.DEFAULT;
private volatile RecvByteBufAllocator rcvBufAllocator;
private volatile MessageSizeEstimator msgSizeEstimator = DEFAULT_MSG_SIZE_ESTIMATOR;
private volatile int connectTimeoutMillis = DEFAULT_CONNECT_TIMEOUT;
private volatile int writeSpinCount = 16;
@SuppressWarnings("FieldMayBeFinal")
private volatile int autoRead = 1;
private volatile boolean autoClose = true;
private volatile WriteBufferWaterMark writeBufferWaterMark = WriteBufferWaterMark.DEFAULT;
private volatile boolean pinEventExecutor = true;
public DefaultChannelConfig(Channel channel) {
this(channel, new AdaptiveRecvByteBufAllocator());
}
protected DefaultChannelConfig(Channel channel, RecvByteBufAllocator allocator) {
setRecvByteBufAllocator(allocator, channel.metadata());
this.channel = channel;
}
@Override
@SuppressWarnings("deprecation")
public Map, Object> getOptions() {
return getOptions(
null,
CONNECT_TIMEOUT_MILLIS, MAX_MESSAGES_PER_READ, WRITE_SPIN_COUNT,
ALLOCATOR, AUTO_READ, AUTO_CLOSE, RCVBUF_ALLOCATOR, WRITE_BUFFER_HIGH_WATER_MARK,
WRITE_BUFFER_LOW_WATER_MARK, WRITE_BUFFER_WATER_MARK, MESSAGE_SIZE_ESTIMATOR,
SINGLE_EVENTEXECUTOR_PER_GROUP);
}
protected Map, Object> getOptions(
Map, Object> result, ChannelOption... options) {
if (result == null) {
result = new IdentityHashMap, Object>();
}
for (ChannelOption o: options) {
result.put(o, getOption(o));
}
return result;
}
@SuppressWarnings("unchecked")
@Override
public boolean setOptions(Map, ?> options) {
if (options == null) {
throw new NullPointerException("options");
}
boolean setAllOptions = true;
for (Entry, ?> e: options.entrySet()) {
if (!setOption((ChannelOption) e.getKey(), e.getValue())) {
setAllOptions = false;
}
}
return setAllOptions;
}
@Override
@SuppressWarnings({ "unchecked", "deprecation" })
public T getOption(ChannelOption option) {
if (option == null) {
throw new NullPointerException("option");
}
if (option == CONNECT_TIMEOUT_MILLIS) {
return (T) Integer.valueOf(getConnectTimeoutMillis());
}
if (option == MAX_MESSAGES_PER_READ) {
return (T) Integer.valueOf(getMaxMessagesPerRead());
}
if (option == WRITE_SPIN_COUNT) {
return (T) Integer.valueOf(getWriteSpinCount());
}
if (option == ALLOCATOR) {
return (T) getAllocator();
}
if (option == RCVBUF_ALLOCATOR) {
return (T) getRecvByteBufAllocator();
}
if (option == AUTO_READ) {
return (T) Boolean.valueOf(isAutoRead());
}
if (option == AUTO_CLOSE) {
return (T) Boolean.valueOf(isAutoClose());
}
if (option == WRITE_BUFFER_HIGH_WATER_MARK) {
return (T) Integer.valueOf(getWriteBufferHighWaterMark());
}
if (option == WRITE_BUFFER_LOW_WATER_MARK) {
return (T) Integer.valueOf(getWriteBufferLowWaterMark());
}
if (option == WRITE_BUFFER_WATER_MARK) {
return (T) getWriteBufferWaterMark();
}
if (option == MESSAGE_SIZE_ESTIMATOR) {
return (T) getMessageSizeEstimator();
}
if (option == SINGLE_EVENTEXECUTOR_PER_GROUP) {
return (T) Boolean.valueOf(getPinEventExecutorPerGroup());
}
return null;
}
@Override
@SuppressWarnings("deprecation")
public boolean setOption(ChannelOption option, T value) {
validate(option, value);
if (option == CONNECT_TIMEOUT_MILLIS) {
setConnectTimeoutMillis((Integer) value);
} else if (option == MAX_MESSAGES_PER_READ) {
setMaxMessagesPerRead((Integer) value);
} else if (option == WRITE_SPIN_COUNT) {
setWriteSpinCount((Integer) value);
} else if (option == ALLOCATOR) {
setAllocator((ByteBufAllocator) value);
} else if (option == RCVBUF_ALLOCATOR) {
setRecvByteBufAllocator((RecvByteBufAllocator) value);
} else if (option == AUTO_READ) {
setAutoRead((Boolean) value);
} else if (option == AUTO_CLOSE) {
setAutoClose((Boolean) value);
} else if (option == WRITE_BUFFER_HIGH_WATER_MARK) {
setWriteBufferHighWaterMark((Integer) value);
} else if (option == WRITE_BUFFER_LOW_WATER_MARK) {
setWriteBufferLowWaterMark((Integer) value);
} else if (option == WRITE_BUFFER_WATER_MARK) {
setWriteBufferWaterMark((WriteBufferWaterMark) value);
} else if (option == MESSAGE_SIZE_ESTIMATOR) {
setMessageSizeEstimator((MessageSizeEstimator) value);
} else if (option == SINGLE_EVENTEXECUTOR_PER_GROUP) {
setPinEventExecutorPerGroup((Boolean) value);
} else {
return false;
}
return true;
}
protected void validate(ChannelOption option, T value) {
if (option == null) {
throw new NullPointerException("option");
}
option.validate(value);
}
@Override
public int getConnectTimeoutMillis() {
return connectTimeoutMillis;
}
@Override
public ChannelConfig setConnectTimeoutMillis(int connectTimeoutMillis) {
if (connectTimeoutMillis < 0) {
throw new IllegalArgumentException(String.format(
"connectTimeoutMillis: %d (expected: >= 0)", connectTimeoutMillis));
}
this.connectTimeoutMillis = connectTimeoutMillis;
return this;
}
/**
* {@inheritDoc}
*
* @throws IllegalStateException if {@link #getRecvByteBufAllocator()} does not return an object of type
* {@link MaxMessagesRecvByteBufAllocator}.
*/
@Override
@Deprecated
public int getMaxMessagesPerRead() {
try {
MaxMessagesRecvByteBufAllocator allocator = getRecvByteBufAllocator();
return allocator.maxMessagesPerRead();
} catch (ClassCastException e) {
throw new IllegalStateException("getRecvByteBufAllocator() must return an object of type " +
"MaxMessagesRecvByteBufAllocator", e);
}
}
/**
* {@inheritDoc}
*
* @throws IllegalStateException if {@link #getRecvByteBufAllocator()} does not return an object of type
* {@link MaxMessagesRecvByteBufAllocator}.
*/
@Override
@Deprecated
public ChannelConfig setMaxMessagesPerRead(int maxMessagesPerRead) {
try {
MaxMessagesRecvByteBufAllocator allocator = getRecvByteBufAllocator();
allocator.maxMessagesPerRead(maxMessagesPerRead);
return this;
} catch (ClassCastException e) {
throw new IllegalStateException("getRecvByteBufAllocator() must return an object of type " +
"MaxMessagesRecvByteBufAllocator", e);
}
}
@Override
public int getWriteSpinCount() {
return writeSpinCount;
}
@Override
public ChannelConfig setWriteSpinCount(int writeSpinCount) {
if (writeSpinCount <= 0) {
throw new IllegalArgumentException(
"writeSpinCount must be a positive integer.");
}
// Integer.MAX_VALUE is used as a special value in the channel implementations to indicate the channel cannot
// accept any more data, and results in the writeOp being set on the selector (or execute a runnable which tries
// to flush later because the writeSpinCount quantum has been exhausted). This strategy prevents additional
// conditional logic in the channel implementations, and shouldn't be noticeable in practice.
if (writeSpinCount == Integer.MAX_VALUE) {
--writeSpinCount;
}
this.writeSpinCount = writeSpinCount;
return this;
}
@Override
public ByteBufAllocator getAllocator() {
return allocator;
}
@Override
public ChannelConfig setAllocator(ByteBufAllocator allocator) {
if (allocator == null) {
throw new NullPointerException("allocator");
}
this.allocator = allocator;
return this;
}
@SuppressWarnings("unchecked")
@Override
public T getRecvByteBufAllocator() {
return (T) rcvBufAllocator;
}
@Override
public ChannelConfig setRecvByteBufAllocator(RecvByteBufAllocator allocator) {
rcvBufAllocator = checkNotNull(allocator, "allocator");
return this;
}
/**
* Set the {@link RecvByteBufAllocator} which is used for the channel to allocate receive buffers.
* @param allocator the allocator to set.
* @param metadata Used to set the {@link ChannelMetadata#defaultMaxMessagesPerRead()} if {@code allocator}
* is of type {@link MaxMessagesRecvByteBufAllocator}.
*/
private void setRecvByteBufAllocator(RecvByteBufAllocator allocator, ChannelMetadata metadata) {
if (allocator instanceof MaxMessagesRecvByteBufAllocator) {
((MaxMessagesRecvByteBufAllocator) allocator).maxMessagesPerRead(metadata.defaultMaxMessagesPerRead());
} else if (allocator == null) {
throw new NullPointerException("allocator");
}
setRecvByteBufAllocator(allocator);
}
@Override
public boolean isAutoRead() {
return autoRead == 1;
}
@Override
public ChannelConfig setAutoRead(boolean autoRead) {
boolean oldAutoRead = AUTOREAD_UPDATER.getAndSet(this, autoRead ? 1 : 0) == 1;
if (autoRead && !oldAutoRead) {
channel.read();
} else if (!autoRead && oldAutoRead) {
autoReadCleared();
}
return this;
}
/**
* Is called once {@link #setAutoRead(boolean)} is called with {@code false} and {@link #isAutoRead()} was
* {@code true} before.
*/
protected void autoReadCleared() { }
@Override
public boolean isAutoClose() {
return autoClose;
}
@Override
public ChannelConfig setAutoClose(boolean autoClose) {
this.autoClose = autoClose;
return this;
}
@Override
public int getWriteBufferHighWaterMark() {
return writeBufferWaterMark.high();
}
@Override
public ChannelConfig setWriteBufferHighWaterMark(int writeBufferHighWaterMark) {
if (writeBufferHighWaterMark < 0) {
throw new IllegalArgumentException(
"writeBufferHighWaterMark must be >= 0");
}
for (;;) {
WriteBufferWaterMark waterMark = writeBufferWaterMark;
if (writeBufferHighWaterMark < waterMark.low()) {
throw new IllegalArgumentException(
"writeBufferHighWaterMark cannot be less than " +
"writeBufferLowWaterMark (" + waterMark.low() + "): " +
writeBufferHighWaterMark);
}
if (WATERMARK_UPDATER.compareAndSet(this, waterMark,
new WriteBufferWaterMark(waterMark.low(), writeBufferHighWaterMark, false))) {
return this;
}
}
}
@Override
public int getWriteBufferLowWaterMark() {
return writeBufferWaterMark.low();
}
@Override
public ChannelConfig setWriteBufferLowWaterMark(int writeBufferLowWaterMark) {
if (writeBufferLowWaterMark < 0) {
throw new IllegalArgumentException(
"writeBufferLowWaterMark must be >= 0");
}
for (;;) {
WriteBufferWaterMark waterMark = writeBufferWaterMark;
if (writeBufferLowWaterMark > waterMark.high()) {
throw new IllegalArgumentException(
"writeBufferLowWaterMark cannot be greater than " +
"writeBufferHighWaterMark (" + waterMark.high() + "): " +
writeBufferLowWaterMark);
}
if (WATERMARK_UPDATER.compareAndSet(this, waterMark,
new WriteBufferWaterMark(writeBufferLowWaterMark, waterMark.high(), false))) {
return this;
}
}
}
@Override
public ChannelConfig setWriteBufferWaterMark(WriteBufferWaterMark writeBufferWaterMark) {
this.writeBufferWaterMark = checkNotNull(writeBufferWaterMark, "writeBufferWaterMark");
return this;
}
@Override
public WriteBufferWaterMark getWriteBufferWaterMark() {
return writeBufferWaterMark;
}
@Override
public MessageSizeEstimator getMessageSizeEstimator() {
return msgSizeEstimator;
}
@Override
public ChannelConfig setMessageSizeEstimator(MessageSizeEstimator estimator) {
if (estimator == null) {
throw new NullPointerException("estimator");
}
msgSizeEstimator = estimator;
return this;
}
private ChannelConfig setPinEventExecutorPerGroup(boolean pinEventExecutor) {
this.pinEventExecutor = pinEventExecutor;
return this;
}
private boolean getPinEventExecutorPerGroup() {
return pinEventExecutor;
}
}
