Optimizing Startup Time

[Tobias Schäfer]

Hi,

I'm the lead developer behind the open source project integrating Micronaut and the process automation platform Camunda.

Camunda uses MyBatis with over 50 XML mapping files, see mappings 

Micronaut is known for its good startup times but unfortunately the bootstrapping of the Camunda engine takes a few seconds. The bottleneck is the parsing of MyBatis' XML mapping files, see also issue #19

I thought about the following optimizations to improve start up times:

1. Use some kind of lazy mapping initialisation (I didn't find any options)

2. Replace XML Mappings with the Java API? Is there a converter somewhere? (I didn't find any converter and there is too much to convert it manually)

3. Switch MyBatis' sequential parsing of XML mappings to parallel parsing. (I tried it some time ago and it helps but I didn't find the best place to synchronize the parallel executions, see branch 353-fixup)

Do you have any idea how to improve start up time?

Kind Regards
Tobias

[Peter Cao]

I found a brand new java persistence layer, there are no any configuration, just only pure java object, and have good execution performance,

I will share with you if you will.

Thanks

Peter

[Tobias Schäfer]

Hi Peter,

I know about the MyBatis Java API: https://mybatis.org/mybatis-3/java-api.html

Is that what you are referring to?

If you have any more details I'd love to hear them.

btw, our project is here: https://github.com/camunda-community-hub/micronaut-camunda-bpm

Kind Regards

Tobias

[Peter Cao]

Hi Tobias,

If you want to find a way to improve the performance of parse Mybatis mapping files, I have no idea,

I want to tell you about a brand new data persistence framework named delicacy https://www.spdycoding.com

It's totally pure java object to implement db operation, no any mapping file needed.

If you want to try this framework for you platform, I will tell the all details about it.

You can reach me, Skype: petercaogx

Thanks.

Peter

Tobias Schäfer <tobias.sc...@gmail.com> 于2021年7月16日周五 下午2:11写道：

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[Tobias Schäfer]

Hi Peter,

thanks.

We're building an integration project between Micronaut and Camunda and it's (the third party product) Camunda that is defining and using those mappings. Therefore it's no option for me to use an alternative framework.

Kind Regars

Tobias

[Peter Cao]

Understood.

And by the way I have a code generator tool to generate MyBatis mapping file and associated Daos, It's not only for database table, 

but also can generate for any select SQL.

You should to try it I think.

Thanks

Peter

Tobias Schäfer <tobias.sc...@gmail.com> 于2021年7月16日周五 下午6:17写道：

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[M Huzaifah]

Share us that generator please. Give us the git repo. 

Regards

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