2 Hikari CPs with different datasource configurations? - spring-boot

Question

Has anyone successfully configured two hikari connection pools with different datasources in a spring boot application? How do I do it using application.properties?

Answer 1

I know that this was asked a long time ago, but I think that it might help others.
In addition, I don't think that the "possible duplicates" mentioned above answer the question.
I'm using spring boot 2.0.4 with maven.
Instead of having a dedicated scope for hikary, as you would if you use one db, e.g.
datasource:
hikari:
connection-test-query: SELECT 1 FROM DUAL
minimum-idle: 1
maximum-pool-size: 2
pool-name: some-pool-name
You can take the settings that you want and put the directly inside the db scope, e.g.:
spring:
datasource:
db1:
type: com.zaxxer.hikari.HikariDataSource
maximum-pool-size: 2
minimum-idle: 1
pool-name: db1-pool
connection-test-query: SELECT 1 FROM DUAL
jdbc-url: jdbc:mysql://${host1}:${port1}/${db1}
username: ${db1-user}
password: ${db1-pass}
driver-class-name: com.mysql.cj.jdbc.Driver
db2:
type: com.zaxxer.hikari.HikariDataSource
maximum-pool-size: 2
minimum-idle: 1
pool-name: db2-pool
connection-test-query: SELECT 1 FROM DUAL
jdbc-url: jdbc:mysql://${host2}:${port2}/${db2}
username: ${db2-user}
password: ${db2-pass}
driver-class-name: com.mysql.cj.jdbc.Driver
As you can see the pool-name and size were set inside that scope.
Then in a java configuration file:
#Configuration
public class AppConfiguration {
....
#Bean("db1")
#ConfigurationProperties(prefix = "spring.datasource.db1")
public DataSource firstDataSource() {
return DataSourceBuilder.create().build();
}
#Bean("db2")
#ConfigurationProperties(prefix = "spring.datasource.db1")
public DataSource secondDataSource() {
return DataSourceBuilder.create().build();
}
}