dubbo ObjectOutput 源码
dubbo ObjectOutput 代码
文件路径：/dubbo-serialization/dubbo-serialization-api/src/main/java/org/apache/dubbo/common/serialize/ObjectOutput.java
/*
* 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 java.io.IOException;
import java.util.Map;
/**
* Object output interface.
*/
public interface ObjectOutput extends DataOutput {
/**
* write object.
*
* @param obj object.
*/
void writeObject(Object obj) throws IOException;
/**
* The following methods are customized for the requirement of Dubbo's RPC protocol implementation. Legacy protocol
* implementation will try to write Map, Throwable and Null value directly to the stream, which does not meet the
* restrictions of all serialization protocols.
*
* <p>
* See how ProtobufSerialization, KryoSerialization implemented these methods for more details.
* <p>
*
* The binding of RPC protocol and biz serialization protocol is not a good practice. Encoding of RPC protocol
* should be highly independent and portable, easy to cross platforms and languages, for example, like the http headers,
* restricting the content of headers / attachments to Ascii strings and uses ISO_8859_1 to encode them.
* https://tools.ietf.org/html/rfc7540#section-8.1.2
*/
default void writeThrowable(Object obj) throws IOException {
writeObject(obj);
}
default void writeEvent(Object data) throws IOException {
writeObject(data);
}
default void writeAttachments(Map<String, Object> attachments) throws IOException {
writeObject(attachments);
}
}
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