Uidgenerator(Baidu) integrated with SpringBoot 2.x.x.x

Reference

• https://github.com/baidu/uid-generator

1. Setup Multiple Envs(local,uat,prod):

• src/main/resources/application.properties : common settings for all envs.
• src/main/resources/application-local.properties: specific settings(e.g.: database) for local env.
• src/main/resources/application-uat.properties: specific settings(e.g.: database) for uat env.
• src/main/resources/application-prod.properties: specific settings(e.g.: database) for prod env.

2. Uidgenerator Configuration.

snowflake.timeBits=31
snowflake.workerBits=20
snowflake.seqBits=12
snowflake.epochStr=2020-11-19

• snowflake.timeBits: the milliseconds start from snowflake.epochStr until now. Changing this bits to extend/shorten the time.
• snowflake.workerBits: worker id, e.g: 2^20 ~= 420W restart times
• snowflake.seqBits: total sequence bits at the same milliseconds time,same worker id.
• snowflake.epochStr: init date time. it's better to start from when you deploy this project. so that it means the total bits of time will start from small numbers.
• TotalBits should equal 63 bits: e.g.: 31+20+12=63, and the first bit is always 0(sign of non-negative number), it is ignored by default.

3. Build

• mvn clean install

4. Run/Debug

• run in terminal: ENV=local mvn spring-boot:run
• Or directly run/debug by Intellij IDEA
• Get id from http://localhost:9090/id

5. Notes

• One database(table name:worker_node) is required for this project.
• For local env the datatable is created automatically. But it's not for any other envs. If you want to change this behavior, please modify the spring.jpa.hibernate.ddl-auto=update in any related *.properties file.
• If you want to manually create the datatable, please refer to src/main/resources/WORKER_NODE.sql