netty结合Protostuff传输对象案例，单机压测秒级接收35万个对象

<protostuff.version>1.7.2</protostuff.version>

<dependency>
            <groupId>io.protostuff</groupId>
            <artifactId>protostuff-core</artifactId>
            <version>${protostuff.version}</version>
        </dependency>

        <dependency>
            <groupId>io.protostuff</groupId>
            <artifactId>protostuff-runtime</artifactId>
            <version>${protostuff.version}</version>
        </dependency>

import io.protostuff.LinkedBuffer;
import io.protostuff.ProtobufIOUtil;
import io.protostuff.Schema;
import io.protostuff.runtime.RuntimeSchema;

import java.util.Map;
import java.util.Objects;
import java.util.concurrent.ConcurrentHashMap;

/**
 *
 * @author wuweifeng10
 * @date 2020/7/18
 **/
public class ProtostuffUtils {
    /**
     * 避免每次序列化都重新申请Buffer空间
     * 这句话在实际生产上没有意义，耗时减少的极小，但高并发下，如果还用这个buffer，会报异常说buffer还没清空，就又被使用了
     */
//    private static LinkedBuffer buffer = LinkedBuffer.allocate(LinkedBuffer.DEFAULT_BUFFER_SIZE);
    /**
     * 缓存Schema
     */
    private static Map<Class<?>, Schema<?>> schemaCache = new ConcurrentHashMap<>();

    /**
     * 序列化方法，把指定对象序列化成字节数组
     *
     * @param obj
     * @param <T>
     * @return
     */
    @SuppressWarnings("unchecked")
    public static <T> byte[] serialize(T obj) {
        Class<T> clazz = (Class<T>) obj.getClass();
        Schema<T> schema = getSchema(clazz);
        LinkedBuffer buffer = LinkedBuffer.allocate(LinkedBuffer.DEFAULT_BUFFER_SIZE);
        byte[] data;
        try {
            data = ProtobufIOUtil.toByteArray(obj, schema, buffer);
//            data = ProtostuffIOUtil.toByteArray(obj, schema, buffer);
        } finally {
            buffer.clear();
        }

        return data;
    }

    /**
     * 反序列化方法，将字节数组反序列化成指定Class类型
     *
     * @param data
     * @param clazz
     * @param <T>
     * @return
     */
    public static <T> T deserialize(byte[] data, Class<T> clazz) {
        Schema<T> schema = getSchema(clazz);
        T obj = schema.newMessage();
        ProtobufIOUtil.mergeFrom(data, obj, schema);
//        ProtostuffIOUtil.mergeFrom(data, obj, schema);
        return obj;
    }

    @SuppressWarnings("unchecked")
    private static <T> Schema<T> getSchema(Class<T> clazz) {
        Schema<T> schema = (Schema<T>) schemaCache.get(clazz);
        if (Objects.isNull(schema)) {
            //这个schema通过RuntimeSchema进行懒创建并缓存
            //所以可以一直调用RuntimeSchema.getSchema(),这个方法是线程安全的
            schema = RuntimeSchema.getSchema(clazz);
            if (Objects.nonNull(schema)) {
                schemaCache.put(clazz, schema);
            }
        }

        return schema;
    }
}

import com.jd.platform.hotkey.common.model.HotKeyMsg;
import com.jd.platform.hotkey.common.tool.ProtostuffUtils;
import io.netty.buffer.ByteBuf;
import io.netty.channel.ChannelHandlerContext;
import io.netty.handler.codec.ByteToMessageDecoder;

import java.util.List;

/**
 * @author wuweifeng
 * @version 1.0
 * @date 2020-07-29
 */
public class MsgDecoder extends ByteToMessageDecoder {
    @Override
    protected void decode(ChannelHandlerContext channelHandlerContext, ByteBuf in, List<Object> list) {
        try {

            byte[] body = new byte[in.readableBytes()];  //传输正常
            in.readBytes(body);

            list.add(ProtostuffUtils.deserialize(body, HotKeyMsg.class));

//            if (in.readableBytes() < 4) {
//                return;
//            }
//            in.markReaderIndex();
//            int dataLength = in.readInt();
//            if (dataLength < 0) {
//                channelHandlerContext.close();
//            }
//            if (in.readableBytes() < dataLength) {
//                in.resetReaderIndex();
//                return;
//            }
//
//            byte[] data = new byte[dataLength];
//            in.readBytes(data);
//
//            Object obj = ProtostuffUtils.deserialize(data, HotKeyMsg.class);
//            list.add(obj);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

import com.jd.platform.hotkey.common.model.HotKeyMsg;
import com.jd.platform.hotkey.common.tool.Constant;
import com.jd.platform.hotkey.common.tool.ProtostuffUtils;
import io.netty.buffer.ByteBuf;
import io.netty.channel.ChannelHandlerContext;
import io.netty.handler.codec.MessageToByteEncoder;

/**
 * @author wuweifeng
 * @version 1.0
 * @date 2020-07-30
 */
public class MsgEncoder extends MessageToByteEncoder {

    @Override
    public void encode(ChannelHandlerContext ctx, Object in, ByteBuf out) {
        if (in instanceof HotKeyMsg) {
            byte[] bytes = ProtostuffUtils.serialize(in);
            byte[] delimiter = Constant.DELIMITER.getBytes();

            byte[] total = new byte[bytes.length + delimiter.length];
            System.arraycopy(bytes, 0, total, 0, bytes.length);
            System.arraycopy(delimiter, 0, total, bytes.length, delimiter.length);

            out.writeBytes(total);
        }
    }
}