Spring Boot-嵌套ConfigurationProperties
Spring Boot具有许多很酷的功能.我最喜欢的一种是通过
Spring boot comes with many cool features. My favourite one is a type-safe configuration mechanism through @ConfigurationProperties and corresponding yml/properties files. I'm writing a library that configures Cassandra connection via Datastax Java driver. I want to allow developers to configure Cluster and Session objects by simply editing yml file. This is easy in spring-boot. But I want to allow her/him configure multiple connections this way. In PHP framework - Symfony it is as easy as:
doctrine:
dbal:
default_connection: default
connections:
default:
driver: "%database_driver%"
host: "%database_host%"
port: "%database_port%"
dbname: "%database_name%"
user: "%database_user%"
password: "%database_password%"
charset: UTF8
customer:
driver: "%database_driver2%"
host: "%database_host2%"
port: "%database_port2%"
dbname: "%database_name2%"
user: "%database_user2%"
password: "%database_password2%"
charset: UTF8
(此摘录来自 Symfony文档)
是否可以在Spring-boot中使用ConfigurationProperties?我应该嵌套它们吗?
Is it possible in spring-boot using ConfigurationProperties? Should I nest them?
您实际上可以使用类型安全的嵌套ConfigurationProperties.
You could actually use type-safe nested ConfigurationProperties.
@ConfigurationProperties
public class DatabaseProperties {
private Connection primaryConnection;
private Connection backupConnection;
// getter, setter ...
public static class Connection {
private String host;
// getter, setter ...
}
}
现在您可以设置属性primaryConnection.host.
如果您不想使用内部类，则可以使用@NestedConfigurationProperty注释字段.
If you don't want to use inner classes then you can annotate the fields with @NestedConfigurationProperty.
@ConfigurationProperties
public class DatabaseProperties {
@NestedConfigurationProperty
private Connection primaryConnection; // Connection is defined somewhere else
@NestedConfigurationProperty
private Connection backupConnection;
// getter, setter ...
}