dm-syncer: support plugin for customization requirements(like double write)

[WangXiangUSTC]

Feature Request

Describe the feature you'd like:

users may have customization requirements like double write and so on, and it not suitable to implement in dm's source code. It is better to implement it by plugin.

proposal: #596

This plugin should support:

• handle ddl event
• handle dml event

And we also need to write a demo to show how to use this plugin.

Score

1000

Mentor(s)

• @csuzhangxc

Contact the mentors: #tidb-challenge-program channel in TiDB Community Slack Workspace

Recommended Skills

• Golang
• Experience with DM

Learning Materials

• DM document
• DM source reading

[WangXiangUSTC]

implement in https://github.com/pingcap/dm/pull/626