使用 JNDI 在 Spring Boot 中配置多个数据源

2022-09-04 08:12:42

我想使用您的应用程序服务器内置功能管理多个数据源,并使用 JNDI 访问它。我正在使用带有Spring JPA数据的Spring boot。

我能够为单个数据源配置 application.properties:

spring.datasource.jndi-name=jdbc/customers

我在上下文中的配置.xml文件如下:

<Resource name="jdbc/customer" auth="Container" type="javax.sql.DataSource"
               maxTotal="100" maxIdle="30" maxWaitMillis="10000"
               username="root" password="root" driverClassName="com.mysql.jdbc.Driver"
               url="jdbc:mysql://localhost:3306/customer"/>

一切都很好。

但是当我无法配置两个数据源时。

我确定在上下文中的配置.xml文件:

 <Resource name="jdbc/customer" auth="Container" type="javax.sql.DataSource"
                   maxTotal="100" maxIdle="30" maxWaitMillis="10000"
                   username="root" password="root" driverClassName="com.mysql.jdbc.Driver"
                   url="jdbc:mysql://localhost:3306/customer"/>

 <Resource name="jdbc/employee" auth="Container" type="javax.sql.DataSource"
                   maxTotal="100" maxIdle="30" maxWaitMillis="10000"
                   username="root" password="root" driverClassName="com.mysql.jdbc.Driver"
                   url="jdbc:mysql://localhost:3306/employee"/>

我对 application.properties 文件配置有疑问。

我尝试了以下选项,但没有成功:

spring.datasource.jndi-name=jdbc/customers,jdbc/employee

请让我知道有关使用JNDI的Spring boot用于多个数据源的任何详细信息。我一直在寻找这个配置好几天了。

根据 Spring Boot 文档进行的第二次试用

spring.datasource.primary.jndi-name=jdbc/customer
spring.datasource.secondary.jndi-name=jdbc/project

配置类。

@Bean
@Primary
@ConfigurationProperties(prefix="datasource.primary")
public DataSource primaryDataSource() {
    return DataSourceBuilder.create().build();
}

@Bean
@ConfigurationProperties(prefix="datasource.secondary")
public DataSource secondaryDataSource() {
    return DataSourceBuilder.create().build();
}

应用程序未启动。虽然tomcat服务器正在开始。日志中不打印任何错误。

第三次试验:与JndiObjectFactoryBean

我有以下应用程序.属性

spring.datasource.primary.expected-type=javax.sql.DataSource
spring.datasource.primary.jndi-name=jdbc/customer
spring.datasource.primary.jpa.database-platform=org.hibernate.dialect.MySQL5Dialect
spring.datasource.primary.jpa.show-sql=false
spring.datasource.primary.jpa.hibernate.ddl-auto=validate

spring.datasource.secondary.jndi-name=jdbc/employee
spring.datasource.secondary.expected-type=javax.sql.DataSource
spring.datasource.secondary.jpa.database-platform=org.hibernate.dialect.MySQL5Dialect
spring.datasource.secondary.jpa.show-sql=false
spring.datasource.secondary.jpa.hibernate.ddl-auto=validate

以及下面的java配置:

@Bean(destroyMethod="")
@Primary
@ConfigurationProperties(prefix="spring.datasource.primary")
public FactoryBean primaryDataSource() {
    return new JndiObjectFactoryBean();
}

@Bean(destroyMethod="")
@ConfigurationProperties(prefix="spring.datasource.secondary")
public FactoryBean secondaryDataSource() {
    return new JndiObjectFactoryBean();
}

但仍然得到错误:

Related cause: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'primaryDataSource' defined in class path resource [com/web/initializer/MvcConfig.class]: Invocation of init method failed; nested exception is javax.naming.NameNotFoundException: Name [jdbc/customer] is not bound in this Context. Unable to find [jdbc].
Related cause: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'secondaryDataSource' defined in class path resource [com/web/initializer/MvcConfig.class]: Invocation of init method failed; nested exception is javax.naming.NameNotFoundException: Name [jdbc/employee] is not bound in this Context. Unable to find [jdbc].
        at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.onRefresh(EmbeddedWebApplicationContext.java:133)
        at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:474)
        at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:118)
        at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:686)
        at org.springframework.boot.SpringApplication.run(SpringApplication.java:320)
        at org.springframework.boot.context.web.SpringBootServletInitializer.run(SpringBootServletInitializer.java:117)
        at org.springframework.boot.context.web.SpringBootServletInitializer.createRootApplicationContext(SpringBootServletInitializer.java:108)
        at org.springframework.boot.context.web.SpringBootServletInitializer.onStartup(SpringBootServletInitializer.java:68)
        at org.springframework.web.SpringServletContainerInitializer.onStartup(SpringServletContainerInitializer.java:175)

更新:使用以下属性文件进行试用:

  spring.datasource.primary.expected-type=javax.sql.DataSource
   spring.datasource.primary.jndi-name=java:comp/env/jdbc/customer

   spring.datasource.secondary.jndi-name=java:comp/env/jdbc/employee
   spring.datasource.secondary.expected-type=javax.sql.DataSource

   spring.jpa.database-platform=org.hibernate.dialect.MySQL5Dialect
   spring.jpa.show-sql=false
   spring.jpa.hibernate.ddl-auto=validate

它在客户架构中创建所有表,但尝试查找其他表也失败。(来自第二个架构)


答案 1

这是您的第三次试用的解决方案,稍作修改。请考虑以下解决方案(Spring Boot 1.3.2):

应用程序.属性文件:

spring.datasource.primary.jndi-name=java:/comp/env/jdbc/SecurityDS
spring.datasource.primary.driver-class-name=org.postgresql.Driver

spring.datasource.secondary.jndi-name=java:/comp/env/jdbc/TmsDS
spring.datasource.secondary.driver-class-name=org.postgresql.Driver

spring.jpa.properties.hibernate.dialect=org.hibernate.dialect.PostgreSQL9Dialect
spring.jpa.show-sql=false

配置:

@Configuration@ EnableConfigurationProperties
public class AppConfig {

    @Bean@ ConfigurationProperties(prefix = "spring.datasource.primary")
    public JndiPropertyHolder primary() {
        return new JndiPropertyHolder();
    }

    @Bean@ Primary
    public DataSource primaryDataSource() {
        JndiDataSourceLookup dataSourceLookup = new JndiDataSourceLookup();
        DataSource dataSource = dataSourceLookup.getDataSource(primary().getJndiName());
        return dataSource;
    }

    @Bean@ ConfigurationProperties(prefix = "spring.datasource.secondary")
    public JndiPropertyHolder secondary() {
        return new JndiPropertyHolder();
    }

    @Bean
    public DataSource secondaryDataSource() {
        JndiDataSourceLookup dataSourceLookup = new JndiDataSourceLookup();
        DataSource dataSource = dataSourceLookup.getDataSource(secondary().getJndiName());
        return dataSource;
    }

    private static class JndiPropertyHolder {
        private String jndiName;

        public String getJndiName() {
            return jndiName;
        }

        public void setJndiName(String jndiName) {
            this.jndiName = jndiName;
        }
    }
}

然后,您可以按照指南 http://docs.spring.io/spring-data/jpa/docs/1.3.0.RELEASE/reference/html/jpa.repositories.html 将数据源与 jpa 存储库配合使用。


答案 2

你可以为此使用一个平原。只需用应该做的伎俩替换它。JndiObjectFactoryBeanDataSourceBuilderJndiObjectFactoryBean

Java 配置

@Bean(destroyMethod="")
@Primary
@ConfigurationProperties(prefix="datasource.primary")
public FactoryBean primaryDataSource() {
    return new JndiObjectFactoryBean();
}

@Bean(destroyMethod="")
@ConfigurationProperties(prefix="datasource.secondary")
public FactoryBean secondaryDataSource() {
    return new JndiObjectFactoryBean();
}

性能

datasource.primary.jndi-name=jdbc/customer
datasource.primary.expected-type=javax.sql.DataSource
datasource.secondary.jndi-name=jdbc/project
datasource.secondary.expected-type=javax.sql.DataSource

您可以使用注释设置 JndiObjectFactoryBean 的每个属性。(请参阅我添加的,但您也可以设置或等)。@ConfigurationPropertiesexpected-typecachelookup-on-startup

注: 当执行 JNDI 查找时,将 设置为 else 时,您可能会遇到这样的情况:当应用程序关闭时,您的 JNDI 资源也会被关闭/关闭。这不是您在共享环境中想要的。destroyMethod""


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