在 Spring 启动应用程序中配置 MongoDB 连接池

Question

I am trying to connect to a MongoDB replica set through a Spring Boot application with read preference secondary. I want to configure idle static connections only to secondary instance that get created automatically on application startup. I am using MongoClient to connect to MongoDB.

I came across MongoClientOptions bean that an be passed while creating the MongoClient. MongoClientOptions provides a property 'minConnectionsPerHost'. This creates idle connections to all the hosts (both primary and secondary). My requirement is to create idle connections only to secondary instance.

@Bean
MongoClientOptions mongoClientOptions() {
    return MongoClientOptions.builder()
            .minConnectionsPerHost(10)
            .build();
}

Is there a way to configure it using MongoClientOptions bean or any alternative to achieve the same result?

Answer 1

You should be able to use minPoolSize URI option to specify the minimum connection pool size for each server. This setting applies to all servers that the client is connected to.

I am not aware of any connection pool size knobs that selectively apply to a subset of the servers.