ProtoStuffSerializer.java

package com.lyncc.netty.production.serializer.protostuff;

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

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

import org.objenesis.Objenesis;
import org.objenesis.ObjenesisStd;

import com.lyncc.netty.production.serializer.Serializer;

/**
 * 具体实现
 * @author BazingaLyn
 * @description
 * @time 2016年7月26日18:55:54
 * @modifytime
 */
public class ProtoStuffSerializer implements Serializer {

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

	private static Objenesis objenesis = new ObjenesisStd(true);

	@SuppressWarnings("unchecked")
	public <T> byte[] writeObject(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 IllegalStateException(e.getMessage(), e);
		} finally {
			buffer.clear();
		}
	}

	public <T> T readObject(byte[] bytes, Class<T> clazz) {
		try {
			T message = objenesis.newInstance(clazz);
			Schema<T> schema = getSchema(clazz);
			ProtostuffIOUtil.mergeFrom(bytes, message, schema);
			return message;
		} catch (Exception e) {
			throw new IllegalStateException(e.getMessage(), e);
		}
	}

	@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;
	}
}