序列化 protostuff

最新推荐文章于 2025-09-06 09:33:29 发布

转载最新推荐文章于 2025-09-06 09:33:29 发布 · 72 阅读

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原文链接：https://my.oschina.net/xiaominmin/blog/1598369

文章标签：

#java #数据库 #python

本文介绍了一个使用Protostuff实现序列化的实用工具类，该工具类支持序列化和反序列化操作，并通过LinkedBuffer优化序列化性能，适用于Redis等场景。

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序列化 protostuff 博客分类： java

package com.cmall.redis.utils;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.util.concurrent.ConcurrentHashMap;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.cmal.redis.vo.SeriObj;
import com.dyuproject.protostuff.LinkedBuffer;
import com.dyuproject.protostuff.ProtostuffIOUtil;
import com.dyuproject.protostuff.Schema;
import com.dyuproject.protostuff.runtime.RuntimeSchema;

public class RedisSeriUtils {
	final static Logger logger = LoggerFactory.getLogger(RedisSeriUtils.class);

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

	/**
	*字段加了@Deprecated 不会序列化
	/
	public static <T> byte[] serialize(final T source) {
		SeriObj<T> SeriObj = new SeriObj<T>(source);
		final LinkedBuffer buffer = LinkedBuffer.allocate(LinkedBuffer.DEFAULT_BUFFER_SIZE);
		try {
			final Schema<SeriObj> schema = getSchema(SeriObj.class);
			return serializeInternal(SeriObj, schema, buffer);
		} catch (final Exception e) {
			throw new IllegalStateException(e.getMessage(), e);
		} finally {
			buffer.clear();
		}
	}

	public static <T> T deserialize(final byte[] bytes) {
		try {
			Schema<SeriObj> schema = getSchema(SeriObj.class);
			SeriObj SeriObj = deserializeInternal(bytes, schema.newMessage(), schema);
			if (SeriObj != null && SeriObj.getValue() != null) {
				return (T) SeriObj.getValue();
			}
		} catch (final Exception e) {
			throw new IllegalStateException(e.getMessage(), e);
		}
		return null;
	}

	/**
	 * 
	 * @description
	 * @return
	 * @Exception
	 * @see RedisSeriUtils.deserialize
	 */
	@Deprecated
	public static Object ByteToObject(byte[] bytes) {
		Object obj = null;
		try {
			if (bytes == null)
				return null;
			ByteArrayInputStream bi = new ByteArrayInputStream(bytes);
			ObjectInputStream oi = new ObjectInputStream(bi);

			obj = oi.readObject();
			bi.close();
			oi.close();
		} catch (Exception e) {
			logger.error("translation", e);
		}
		return obj;
	}

	/**
	 * 
	 * @description
	 * @return
	 * @Exception
	 * @see RedisSeriUtils.serialize
	 */
	@Deprecated
	public static byte[] ObjectToByte(Object obj) {
		byte[] bytes = null;
		try {
			// object to bytearray
			ByteArrayOutputStream bo = new ByteArrayOutputStream();
			ObjectOutputStream oo = new ObjectOutputStream(bo);
			oo.writeObject(obj);

			bytes = bo.toByteArray();

			bo.close();
			oo.close();
		} catch (Exception e) {
			logger.error("translation", e);
		}
		return bytes;
	}

	private static <T> byte[]   serializeInternal(final T source, final Schema<T> schema, final LinkedBuffer buffer) {
		return ProtostuffIOUtil.toByteArray(source, schema, buffer);
	}

	private  static <T> T deserializeInternal(final byte[] bytes, final T result, final Schema<T> schema) {
		ProtostuffIOUtil.mergeFrom(bytes, result, schema);
		return result;
	}

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

}

转载于:https://my.oschina.net/xiaominmin/blog/1598369