Hacktoberfest 2026:维护者为十月标记出来的 issue,仍然开放、适合新手。 浏览 Hacktoberfest issue

Add method to get the schema (version) used for serialization of a message

未关闭
#362 0 条评论 0 个 reaction 已指派 0 人 在 GitHub 查看

还没有人认领这个 Issue。

评估

难度
5/5
预计耗时
一周以上
新手友好度
25/100
Issue 类型
功能
描述清晰度
需要澄清
活跃度
停滞
技术栈
javascript, nodejs

调研方向

从 Pulsar schema 概览和关联的 node-client issue 开始,确认 schema 版本是如何附加到消息上的,以及 Node 客户端是否公开这些版本。定义获取序列化 schema 或版本所需的 API,然后确认它支持在 schema 演进过程中可靠地进行 Avro 反序列化。

由索引模型根据 Issue 内容生成。

描述

There are client libraries for other languages (e.g. java) that support automatic (de)serialization of message data based on a schema (https://pulsar.apache.org/docs/3.1.x/schema-overview/).
The node client does not have this feature yet (https://github.com/apache/pulsar-client-node/issues/242).

In theory it should be possible to deserialize the message data manually, BUT...
Some serialization formats like Avro require to know the exact schema that was used for serialization (https://github.com/mtth/avsc/issues/447). In order to deal with schema evolution the client needs to know it's own compatible schema AND the schema used for serialization.
As far I understand, the automatic (de)serialization feature of Pulsar solves this problem by keeping a schema registry and tagging the messages with the used schema version.
If I understand right, the node client does not provide a method to get the schema used for serialization and not even a method to get the schema version of a message.
Assuming the need for schema evolution, this makes it impossible to deserialize reliably messages written by a java client library using an Avro schema,

I'm new to Pulsar and Avro, so please forgive (and correct) me if my understanding is wrong.

If my understanding is right, I wonder how difficult it would be to add a method to lookup the serialization schema on an message.

主要语言
C++
星标
164
派生
99
平均合并
5 天 18 小时
30 天内合并 PR
2

贡献指南

这个仓库没有索引到贡献指南

从这里开始

  1. 先读完整个 Issue,再读项目的贡献指南。
  2. 在 Issue 下留言说明你要接手 —— 这能避免两个人做同样的事。
  3. Fork 仓库,在一个分支上完成修改。
  4. 提交 Pull Request,并在描述里引用这个 Issue 编号。

apache/pulsar-client-node 的其他 Issue

查看 apache/pulsar-client-node 的全部 Issue

相似的 Issue

更多 C++ Issue

把新 issue 发到你的邮箱

精选适合新手参与的 GitHub issue 摘要。