how to migrate notification service to microservice.

1. Copyright © 2020 Present ANDPAD Inc. This information is confidential and was prepared by ANDPAD Inc. for the use of our client. It is not to be relied on by and 3rd party. Proprietary & Confidential 無断転載・無断複製の禁止
Convert the notification feature to the notification microservice

2. Selft-Introduction
Copyright © 2020 Present ANDPAD Inc. This information is confidential and was prepared by ANDPAD Inc. for the use of our client. It is not to be relied on by and 3rd party. Proprietary & Confidential 無断転載・無断複製の禁止

3. daisuke0131
After graduated from university, Joined Fujitsu Laboratories.
I developed firmware, AI, Web services, ios/android apps.
After the career, Joined startups to experience something new.
Joined ANDPAD in 2016. Developed mobile applications.
山下 大輔 Daisuke Yamashita
ANDPAD Chief Development Officer
Self-Introduction

4. What is ANDPAD?
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5. What is ANDPAD?
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・Project Management System For Construction Industry
・Project Management, Chat, Blueprint, Inspection, Schedule Adjustment
swift/kotlin swift/kotlin swift ReactNative→Flutter Flutter

6. Many features in ANDPAD
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Project Management
Chat Communication
Inspection
Blueprint
The others
ANDPAD
For Administrator, Notifications, Settings and so on.
Built by Ruby on Rails

7. How migrate notifications
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8. Notification feature
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For what？
・inform actions to users
What features does it have?
・push notifications
・mail deliveries
・desktop notifications
・manage big notification data

9. Problems
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Problems
notification data is growing rapidly
like exponential function.
100,000,000 records/year
DynamoDB is a good choice for
large data(>1,000,000,000).
ref)https://speakerdeck.com/paypay/paypaydefalsedynamodbhuo-yong-shi-li-nituite
RDS is not suitable.

10. Architeucture
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Start version Intermediate version Migrated version
notification data increase rapidly.

11. How migrate notifications
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There are 3 steps
1. Divide the notification logic from the monolithic application(Rails Application).
2. Data transfer to the new Database system(DynamoDB).
3. Develop a switching system to release the new notification service gradually.

12. Divide the notification logic
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Divide logics as a service class.
ANDPAD has 200-300 methods.

13. Data transfer to the new DB system
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Evaluate Differences
Develop the W-Write system(each service
can write each database) to transfer
notification data.(not work push/mail
notification and so on.)
Also develop features to evaluate the
differences.

14. Develop switching system for canary release
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down to zero.
If the differences are closing to zero,
we can release new notification service
gradually.
We develop switching system between old and
new notifications for canary release.

15. All step done.
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Delete old data table for notification.
New notification service is released!!

16. Conclusion
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・explained how to convert notification service to the
microservice in ANDPAD.
・we are now 2nd step.
If you join ANDPAD, you can experience monolith to
microservice.