分佈式服務架構學習（二）：實現自己的序列化工具引擎（一）-引擎實現

分佈式項目中，也許會用到不同的序列化方式，自己整理了常見的序列化方式，手寫了一個序列化引擎。

引擎SerializerEngine.java代碼如下：

package ares.remoting.framework.serialization.engine;


import ares.remoting.framework.serialization.common.SerializeType;
import ares.remoting.framework.serialization.serializer.ISerializer;
import ares.remoting.framework.serialization.serializer.impl.*;
import avro.shaded.com.google.common.collect.Maps;

import java.util.Map;

/**
 * @author fuss created on 18/7/23.
 * @version $Id$
 */
public class SerializerEngine {

    public static final Map<SerializeType, ISerializer> serializerMap = Maps.newConcurrentMap();

    static {
        serializerMap.put(SerializeType.DefaultJavaSerializer, new DefaultJavaSerializer());
        serializerMap.put(SerializeType.HessianSerializer, new HessianSerializer());
        serializerMap.put(SerializeType.JSONSerializer, new JSONSerializer());
        serializerMap.put(SerializeType.XmlSerializer, new XmlSerializer());
        serializerMap.put(SerializeType.ProtoStuffSerializer, new ProtoStuffSerializer());
        serializerMap.put(SerializeType.MarshallingSerializer, new MarshallingSerializer());

        //以下三類不能使用普通的java bean
        serializerMap.put(SerializeType.AvroSerializer, new AvroSerializer());
        serializerMap.put(SerializeType.ThriftSerializer, new ThriftSerializer());
        serializerMap.put(SerializeType.ProtocolBufferSerializer, new ProtocolBufferSerializer());
    }


    public static <T> byte[] serialize(T obj, String serializeType) {
        SerializeType serialize = SerializeType.queryByType(serializeType);
        if (serialize == null) {
            throw new RuntimeException("serialize is null");
        }

        ISerializer serializer = serializerMap.get(serialize);
        if (serializer == null) {
            throw new RuntimeException("serialize error");
        }

        try {
            return serializer.serialize(obj);
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }


    public static <T> T deserialize(byte[] data, Class<T> clazz, String serializeType) {

        SerializeType serialize = SerializeType.queryByType(serializeType);
        if (serialize == null) {
            throw new RuntimeException("serialize is null");
        }
        ISerializer serializer = serializerMap.get(serialize);
        if (serializer == null) {
            throw new RuntimeException("serialize error");
        }

        try {
            return serializer.deserialize(data, clazz);
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }


}

序列化類型枚舉類SerializeType.java，代碼如下：

package ares.remoting.framework.serialization.common;

import org.apache.commons.lang.StringUtils;

/**
 * @author fuss created on 18/7/23.
 * @version $Id$
 */
public enum SerializeType {

    DefaultJavaSerializer("DefaultJavaSerializer"),
    HessianSerializer("HessianSerializer"),
    JSONSerializer("JSONSerializer"),
    ProtoStuffSerializer("ProtoStuffSerializer"),
    XmlSerializer("XmlSerializer"),
    MarshallingSerializer("MarshallingSerializer"),

    AvroSerializer("AvroSerializer"),
    ProtocolBufferSerializer("ProtocolBufferSerializer"),
    ThriftSerializer("ThriftSerializer");

    private String serializeType;

    private SerializeType(String serializeType) {
        this.serializeType = serializeType;
    }


    public static SerializeType queryByType(String serializeType) {
        if (StringUtils.isBlank(serializeType)) {
            return null;
        }

        for (SerializeType serialize : SerializeType.values()) {
            if (StringUtils.equals(serializeType, serialize.getSerializeType())) {
                return serialize;
            }
        }
        return null;
    }

    public String getSerializeType() {
        return serializeType;
    }
}

序列化引擎SerializerEngine通過static塊，在類加載的時候將9類序列化算法註冊到本地緩存serializerMap中，提供了相應的序列化與反序列化通用處理方法。

通過引擎可以通過傳入類型參數的方式，靈活選擇具體的序列化/發序列化方案，做到序列化和反序列化的可配置化。

其中，9種序列化方式，我會採用策略模式分別實現，實現類列表：

DefaultJavaSerializer.java

XmlSerializer.java

JSONSerializer.java

HessianSerializer.java

ProtocolBufferSerializer.java

ProtoStuffSerializer.java

ThriftSerializer.java

AvroSerializer.java

MarshallingSerializer.java