org.apache.dubbo.common.serialize.Serialization Maven / Gradle / Ivy
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.dubbo.common.serialize;
import org.apache.dubbo.common.URL;
import org.apache.dubbo.common.extension.Adaptive;
import org.apache.dubbo.common.extension.SPI;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
/**
* Serialization strategy interface that specifies a serializer. (SPI, Singleton, ThreadSafe)
*
* The default extension is hessian2 and the default serialization implementation of the dubbo protocol.
*
* e.g. <dubbo:protocol serialization="xxx" />
*
*/
@SPI("hessian2")
public interface Serialization {
/**
* Get content type unique id, recommended that custom implementations use values different with
* any value of {@link Constants} and don't greater than ExchangeCodec.SERIALIZATION_MASK (31)
* because dubbo protocol use 5 bits to record serialization ID in header.
*
* @return content type id
*/
byte getContentTypeId();
/**
* Get content type
*
* @return content type
*/
String getContentType();
/**
* Get a serialization implementation instance
*
* @param url URL address for the remote service
* @param output the underlying output stream
* @return serializer
* @throws IOException
*/
@Adaptive
ObjectOutput serialize(URL url, OutputStream output) throws IOException;
/**
* Get a deserialization implementation instance
*
* @param url URL address for the remote service
* @param input the underlying input stream
* @return deserializer
* @throws IOException
*/
@Adaptive
ObjectInput deserialize(URL url, InputStream input) throws IOException;
}