我正在尝试找到向我们的应用程序添加第二个数据源的最佳方法。主要目的是通过其余方式向数据库公开 CRUD 操作,并且需要针对第二个数据库进行反弹以进行身份验证和角色管理。我们没有使用 XML 配置。
有没有办法简单地在现有的 PersistenceConfig.java 文件中添加第二个数据源 bean,或者我们是否需要为第二个数据库实例复制整个配置类?
应用程序:
包 foo;
import foo.config.PersistenceConfig;
import foo.config.RepositoryRestConfig;
import foo.config.WebConfig;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Import;
import org.springframework.data.jpa.repository.config.EnableJpaRepositories;
@Configuration
@ComponentScan
@EnableJpaRepositories
@Import({PersistenceConfig.class, WebConfig.class, RepositoryRestConfig.class})
@EnableAutoConfiguration
public class Application {
public static void main(String[] args) {
SpringApplication.run(Application.class, args);
}
}
回购协议:
package foo.repository;
import foo.Widget;
import org.springframework.data.repository.CrudRepository;
import org.springframework.data.repository.query.Param;
import org.springframework.data.rest.core.annotation.RepositoryRestResource;
import java.util.List;
@RepositoryRestResource(collectionResourceRel = "widgets", path = "widgets")
public interface WidgetsRepository extends CrudRepository<Widget, Long> {
List<Widget> findByWidgetId(@Param("widgetid") long widgetId);
}
持久化配置:
package foo.config;
import org.apache.commons.dbcp2.BasicDataSource;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Import;
import org.springframework.context.annotation.Primary;
import org.springframework.data.jpa.repository.config.EnableJpaRepositories;
import org.springframework.data.rest.webmvc.config.RepositoryRestMvcConfiguration;
import org.springframework.orm.jpa.JpaDialect;
import org.springframework.orm.jpa.JpaTransactionManager;
import org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean;
import org.springframework.orm.jpa.vendor.Database;
import org.springframework.orm.jpa.vendor.HibernateJpaDialect;
import org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter;
import org.springframework.transaction.PlatformTransactionManager;
import org.springframework.transaction.annotation.EnableTransactionManagement;
import javax.persistence.PersistenceContext;
import javax.sql.DataSource;
@Configuration
@Import(RepositoryRestMvcConfiguration.class)
@EnableJpaRepositories
@EnableTransactionManagement
public class PersistenceConfig {
@Bean
public LocalContainerEntityManagerFactoryBean entityManagerFactory() {
final HibernateJpaVendorAdapter vendorAdapter = new HibernateJpaVendorAdapter();
vendorAdapter.setDatabase(Database.SQL_SERVER);
vendorAdapter.setShowSql(true);
final LocalContainerEntityManagerFactoryBean factory = new LocalContainerEntityManagerFactoryBean();
factory.setJpaVendorAdapter(vendorAdapter);
factory.setPackagesToScan("foo.model");
factory.setDataSource(dataSource());
return factory;
}
@Bean(destroyMethod = "close")
public DataSource dataSource() {
BasicDataSource dataSource = new BasicDataSource();
dataSource.setDriverClassName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
dataSource.setUrl("jdbc:sqlserver://127.0.0.1:1433;databaseName=fooDB");
dataSource.setUsername("sa");
dataSource.setPassword("*******");
dataSource.setTestOnBorrow(true);
dataSource.setTestOnReturn(true);
dataSource.setTestWhileIdle(true);
dataSource.setTimeBetweenEvictionRunsMillis(1800000L);
dataSource.setNumTestsPerEvictionRun(3);
dataSource.setMinEvictableIdleTimeMillis(1800000L);
dataSource.setValidationQuery("SELECT 1");
return dataSource;
}
@Bean
public JpaDialect jpaDialect() {
return new HibernateJpaDialect();
}
@Bean
public PlatformTransactionManager transactionManager() {
JpaTransactionManager txManager = new JpaTransactionManager();
txManager.setEntityManagerFactory(entityManagerFactory().getObject());
return txManager;
}
}
谢谢您的帮助...
看一眼@Qualifier
注解。使用此注释,您可以定义相同类型的各种 bean 并为它们分配名称。它相当于id
参数输入bean
XML 标签。
This is Spring文档的相关部分 http://docs.spring.io/spring/docs/current/spring-framework-reference/html/beans.html#beans-autowired-annotation-qualifiers.
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