分佈式服務架構學習（八）：實現自己的序列化工具引擎（七）-序列化protostuff實現

protostuff基於Google protobuf，其中，protostuff-runtime實現了無需預編譯的Java Bean進行protobuf序列化/反序列化的能力。

對於僅適用Java語言，且無需跨語言的適用場景，protostuff繼承了Google protobuf的高性能的同事免去了編寫.proto文件的麻煩，是非常值得推薦的序列化/反序列化方案。

代碼如下：

package ares.remoting.framework.serialization.serializer.impl;

import ares.remoting.framework.serialization.serializer.ISerializer;
import com.dyuproject.protostuff.LinkedBuffer;
import com.dyuproject.protostuff.ProtostuffIOUtil;
import com.dyuproject.protostuff.Schema;
import com.dyuproject.protostuff.runtime.RuntimeSchema;

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

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


    private static Map<Class<?>, Schema<?>> cachedSchema = new ConcurrentHashMap<Class<?>, Schema<?>>();


    @SuppressWarnings("unchecked")
    private static <T> Schema<T> getSchema(Class<T> cls) {
        Schema<T> schema = (Schema<T>) cachedSchema.get(cls);
        if (schema == null) {
            schema = RuntimeSchema.createFrom(cls);
            cachedSchema.put(cls, schema);
        }
        return schema;
    }

    @SuppressWarnings("unchecked")
    public <T> byte[] serialize(T obj) {
        Class<T> cls = (Class<T>) obj.getClass();
        LinkedBuffer buffer = LinkedBuffer.allocate(LinkedBuffer.DEFAULT_BUFFER_SIZE);
        try {
            Schema<T> schema = getSchema(cls);
            return ProtostuffIOUtil.toByteArray(obj, schema, buffer);
        } catch (Exception e) {
            throw new RuntimeException(e);
        } finally {
            buffer.clear();
        }
    }

    public <T> T deserialize(byte[] data, Class<T> cls) {
        try {
            T message = (T) cls.getConstructors()[0].newInstance();
            Schema<T> schema = getSchema(cls);
            ProtostuffIOUtil.mergeFrom(data, message, schema);
            return message;
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }


}

maven依賴，代碼如下：

<!-- Protostuff -->
        <dependency>
            <groupId>com.dyuproject.protostuff</groupId>
            <artifactId>protostuff-core</artifactId>
            <version>1.0.9</version>
        </dependency>
        <dependency>
            <groupId>com.dyuproject.protostuff</groupId>
            <artifactId>protostuff-runtime</artifactId>
            <version>1.0.9</version>
        </dependency>