org.redisson.client.handler.CommandEncoder Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of redisson-all Show documentation
Show all versions of redisson-all Show documentation
Easy Redis Java client and Real-Time Data Platform. Valkey compatible. Sync/Async/RxJava3/Reactive API. Client side caching. Over 50 Redis based Java objects and services: JCache API, Apache Tomcat, Hibernate, Spring, Set, Multimap, SortedSet, Map, List, Queue, Deque, Semaphore, Lock, AtomicLong, Map Reduce, Bloom filter, Scheduler, RPC
/**
* Copyright (c) 2013-2024 Nikita Koksharov
*
* Licensed 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.
*/
/**
* Copyright 2012 Sam Pullara
*
* Licensed 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 org.redisson.client.handler;
import io.netty.buffer.*;
import io.netty.channel.ChannelHandler.Sharable;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelPromise;
import io.netty.handler.codec.MessageToByteEncoder;
import io.netty.util.CharsetUtil;
import org.redisson.client.ChannelName;
import org.redisson.client.protocol.CommandData;
import org.redisson.client.protocol.RedisCommands;
import org.redisson.config.CommandMapper;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.util.List;
import java.util.stream.Collectors;
import java.util.stream.LongStream;
/**
* Redis protocol command encoder
*
* @author Nikita Koksharov
*
*/
@Sharable
public class CommandEncoder extends MessageToByteEncoder> {
private final Logger log = LoggerFactory.getLogger(getClass());
private static final char ARGS_PREFIX = '*';
private static final char BYTES_PREFIX = '$';
private static final byte[] CRLF = "\r\n".getBytes();
private static final Integer LONG_TO_STRING_CACHE_SIZE = 1000;
private static final List LONG_TO_STRING_CACHE = LongStream.range(0, LONG_TO_STRING_CACHE_SIZE)
.mapToObj(Long::toString)
.map(s -> s.getBytes(CharsetUtil.US_ASCII))
.collect(Collectors.toList());
public static byte[] longToString(long number) {
if (number < LONG_TO_STRING_CACHE.size()) {
return LONG_TO_STRING_CACHE.get((int) number);
} else {
return Long.toString(number).getBytes(CharsetUtil.US_ASCII);
}
}
private CommandMapper commandMapper;
public CommandEncoder(CommandMapper commandMapper) {
this.commandMapper = commandMapper;
}
@Override
public void write(ChannelHandlerContext ctx, Object msg, ChannelPromise promise) throws Exception {
if (acceptOutboundMessage(msg)) {
if (!promise.setUncancellable()) {
return;
}
}
try {
super.write(ctx, msg, promise);
} catch (Exception e) {
promise.tryFailure(e);
throw e;
}
}
@Override
protected void encode(ChannelHandlerContext ctx, CommandData, ?> msg, ByteBuf out) throws Exception {
try {
out.writeByte(ARGS_PREFIX);
int len = 1 + msg.getParams().length;
if (msg.getCommand().getSubName() != null) {
len++;
}
out.writeBytes(longToString(len));
out.writeBytes(CRLF);
String name = commandMapper.map(msg.getCommand().getName());
writeArgument(out, name.getBytes(CharsetUtil.UTF_8));
if (msg.getCommand().getSubName() != null) {
writeArgument(out, msg.getCommand().getSubName().getBytes(CharsetUtil.UTF_8));
}
for (Object param : msg.getParams()) {
ByteBuf buf = encode(param);
writeArgument(out, buf);
if (!(param instanceof ByteBuf)) {
buf.release();
}
}
if (log.isTraceEnabled()) {
String info = out.toString(CharsetUtil.UTF_8);
if (RedisCommands.AUTH.equals(msg.getCommand())) {
info = info.substring(0, info.indexOf(RedisCommands.AUTH.getName()) + RedisCommands.AUTH.getName().length()) + "(password masked)";
}
log.trace("channel: {} message: {}", ctx.channel(), info);
}
} catch (Exception e) {
msg.tryFailure(e);
throw e;
}
}
private ByteBuf encode(Object in) {
if (in == null) {
return new EmptyByteBuf(ByteBufAllocator.DEFAULT);
}
if (in instanceof byte[]) {
return Unpooled.wrappedBuffer((byte[]) in);
}
if (in instanceof ByteBuf) {
return (ByteBuf) in;
}
if (in instanceof ChannelName) {
return Unpooled.wrappedBuffer(((ChannelName) in).getName());
}
String payload = in.toString();
ByteBuf buf = ByteBufAllocator.DEFAULT.buffer(ByteBufUtil.utf8MaxBytes(payload));
ByteBufUtil.writeUtf8(buf, payload);
return buf;
}
private void writeArgument(ByteBuf out, byte[] arg) {
out.writeByte(BYTES_PREFIX);
out.writeBytes(longToString(arg.length));
out.writeBytes(CRLF);
out.writeBytes(arg);
out.writeBytes(CRLF);
}
private void writeArgument(ByteBuf out, ByteBuf arg) {
out.writeByte(BYTES_PREFIX);
out.writeBytes(longToString(arg.readableBytes()));
out.writeBytes(CRLF);
out.writeBytes(arg, arg.readerIndex(), arg.readableBytes());
out.writeBytes(CRLF);
}
}
© 2015 - 2024 Weber Informatics LLC | Privacy Policy