我希望在我的应用程序中有多个DataSource
。因此不能依赖Spring的数据源自动配置而必须创建我自己的,如下所示:
@Bean
@Primary
@ConfigurationProperties("spring.datasource.custom")
public DataSource primaryDataSource() {
return DataSourceBuilder.create().build();
}
spring.datasource.custom.url=jdbc:mysql://localhost/tablename
spring.datasource.custom.username=root
spring.datasource.custom.password=rootpw
spring.datasource.custom.driver-class-name=com.mysql.jdbc.Driver
#the important part:
spring.datasource.custom.tomcat.test-on-borrow=true
spring.datasource.custom.tomcat.validation-query=SELECT 1
问题:.tomcat.*
属性不会自动获取。
问题:我怎样才能将它们带入DataSource
?
答案 0 :(得分:2)
您需要创建多个数据源bean,其中一个是@Primary
,您可以像这样设置tomcat连接池属性
@Value("${spring.datasource.custom.tomcat.validation-query}")
private String validationQuery;
@Value("${spring.datasource.custom.tomcat.test-on-borrow}")
private boolean onBorrow;
org.apache.tomcat.jdbc.pool.DataSource ds = new org.apache.tomcat.jdbc.pool.DataSource();
ds.setValidationQuery(validationQuery);
ds.setTestOnBorrow(onBorrow);
而不是return DataSourceBuilder.create().build();
,您需要返回上面创建的数据源
答案 1 :(得分:1)
在application.properties中包含以下几行:
spring.datasource.custom.url=jdbc:mysql://localhost/tablename
spring.datasource.custom.username=root
spring.datasource.custom.password=rootpw
spring.datasource.custom.driver-class-name=com.mysql.jdbc.Driver
spring.datasource.custom.type=org.apache.tomcat.jdbc.pool.DataSource
#the important part:
spring.datasource.custom.tomcat.test-on-borrow=true
spring.datasource.custom.tomcat.validation-query=SELECT 1
您的配置bean应该如下所示:
@Bean
@Primary
@ConfigurationProperties("spring.datasource.custom")
public DataSourceProperties primaryDataSourceProperties() {
return new DataSourceProperties;
}
@Bean
@Primary
@ConfigurationProperties("spring.datasource.custom.tomcat")
public DataSource primaryDataSource() {
return primaryDataSourceProperties().initializeDataSourceBuilder().build();
}
我当前的Spring Boot版本是1.5.18
答案 2 :(得分:0)
我通过org.springframework.boot.autoconfigure.jdbc.DataSourceConfiguration.Tomcat类查看spring boot是如何工作的,非常简单。
示例:
@Bean
@Primary // or @Qualifier("foobar")
@ConfigurationProperties("foobar.datasource")
DataSourceProperties foobarDataSourceProperties() {
return new DataSourceProperties();
}
@Bean
@Primary // or @Qualifier("foobar")
@ConfigurationProperties("foobar.datasource.tomcat")
public org.apache.tomcat.jdbc.pool.DataSource foobarDataSource(DataSourceProperties properties) {
org.apache.tomcat.jdbc.pool.DataSource dataSource = createDataSource(properties, org.apache.tomcat.jdbc.pool.DataSource.class);
DatabaseDriver databaseDriver = DatabaseDriver.fromJdbcUrl(properties.determineUrl());
String validationQuery = databaseDriver.getValidationQuery();
if (validationQuery != null) {
dataSource.setTestOnBorrow(true);
dataSource.setValidationQuery(validationQuery);
}
return dataSource;
}
@SuppressWarnings("unchecked")
protected <T> T createDataSource(/*@Qualifier("foobar")*/ DataSourceProperties properties, Class<? extends DataSource> type) {
return (T) properties.initializeDataSourceBuilder().type(type).build();
}
此属性将被提取:
foobar.datasource.tomcat.test-on-borrow=false
foobar.datasource.tomcat.test-while-idle=true
foobar.datasource.tomcat.validation-interval=5000
foobar.datasource.tomcat.<whateve other props tomcat's pool accepts>=xxx