[英]Spring Boot Multi Data sources : How to configure multi spring.jpa properties in java class
application.yml应用程序.yml
spring:
security:
user:
name: test
password: admin
datasource:
platform: postgres
jdbc-url: jdbc:postgresql://localhost:5432/ktnb
username: xxxx
password: xxxx
driverClassName: org.postgresql.Driver
sqlserver-datasource:
jdbc-url: jdbc:sqlserver://192.168.0.10;databaseName=backup1
username: xxx
password: xxx
driverClassName: com.microsoft.sqlserver.jdbc.SQLServerDriver
PrimaryDBConfig.java PrimaryDBConfig.java
package com.ktnb.keahlian.config;
import java.util.HashMap;
import java.util.Map;
import javax.persistence.EntityManagerFactory;
import javax.sql.DataSource;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.boot.jdbc.DataSourceBuilder;
import org.springframework.boot.orm.jpa.EntityManagerFactoryBuilder;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Primary;
import org.springframework.data.jpa.repository.config.EnableJpaRepositories;
import org.springframework.orm.jpa.JpaTransactionManager;
import org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean;
import org.springframework.transaction.PlatformTransactionManager;
import org.springframework.transaction.annotation.EnableTransactionManagement;
@Configuration
@EnableTransactionManagement
@EnableJpaRepositories(
entityManagerFactoryRef = "entityManagerFactory",
transactionManagerRef = "transactionManager",
basePackages = { "com.ktnb.keahlian.repository" }
)
public class PrimaryDBConfig {
@Primary
@Bean(name = "dataSource")
@ConfigurationProperties(prefix = "spring.datasource")
public DataSource dataSource() {
return DataSourceBuilder.create().build();
}
@Primary
@Bean(name = "entityManagerFactory")
public LocalContainerEntityManagerFactoryBean
entityManagerFactory(
EntityManagerFactoryBuilder builder,
@Qualifier("dataSource") DataSource dataSource
) {
Map<String, Object> properties = new HashMap<String, Object>();
properties.put("spring.jpa.database", "postgresql");
properties.put("spring.jpa.show-sql", "true");
properties.put("spring.jpa.hibernate.ddl-auto", "create");
properties.put("spring.jpa.properties.hibernate.default_schema", "keahlian");
properties.put("spring.jpa.org.hibernate.envers.default_schema", "keahlian_envers");
properties.put("spring.jpa.org.hibernate.envers.audit_strategy", "org.hibernate.envers.strategy.ValidityAuditStrategy");
return builder
.dataSource(dataSource)
.packages("com.ktnb.keahlian.entity")
.persistenceUnit("primaryDB")
.properties(properties)
.build();
}
@Primary
@Bean(name = "transactionManager")
public PlatformTransactionManager transactionManager(
@Qualifier("entityManagerFactory") EntityManagerFactory
entityManagerFactory
) {
return new JpaTransactionManager(entityManagerFactory);
}
}
But it cannot found right table/schema and not able show sql into console.但它找不到正确的表/模式并且无法在控制台中显示 sql。
Primary datasource for development DB.开发数据库的主要数据源。
Secondary datasource for Production DB.生产数据库的辅助数据源。
[INFO ] 2020-08-21 09:38:30.116 [http-nio-8080-exec-1] SessionListenerImpl - ==== Session is created ====
[INFO ] 2020-08-21 09:38:30.116 [http-nio-8080-exec-1] SessionListenerImpl - Total active session are 1
[WARN ] 2020-08-21 09:38:32.480 [http-nio-8080-exec-6] SqlExceptionHelper - SQL Error: 0, SQLState: 42P01
[ERROR] 2020-08-21 09:38:32.480 [http-nio-8080-exec-6] SqlExceptionHelper - ERROR: relation "pengguna" does not exist
Position: 467
Can you try this?你能试试这个吗?
application.properties应用程序属性
primary.url={primary-database-url}
primary.username={primary-database-username}
primary.password={primary-database-password}
primary.driver-class-name=com.mysql.jdbc.Driver
primary.test-on-borrow=true
primary.validation-query=SELECT 1
secondary.url={secondary-database-url}
secondary.username={secondary-database-username}
secondary.password={secondary-database-password}
secondary.driver-class-name=com.mysql.jdbc.Driver
secondary.test-on-borrow=true
secondary.validation-query=SELECT 1
secondary.validation-interval=25200000
Create the configuration beans创建配置bean
@Bean(name = "primaryDataSource")
@ConfigurationProperties("primary")
@Primary
public DataSource primaryDataSource() {
return DataSourceBuilder.create().build();
}
@Bean(name = "secondaryDataSource")
@ConfigurationProperties("secondary")
public DataSource secondaryDataSource() {
return DataSourceBuilder.create().build();
}
Next, create the JdbcTemplate beans that we are going to use for accessing the data sources in our data access layer.接下来,创建我们将用于访问数据访问层中的数据源的 JdbcTemplate bean。
@Bean(name = "primaryJdbcTemplate")
public JdbcTemplate primaryJdbcTemplate(@Qualifier("primary") DataSource primaryDs) {
return new JdbcTemplate(writeDs);
}
@Bean(name = “secondaryJdbcTemplate")
public JdbcTemplate secondaryJdbcTemplate(@Qualifier("secondary") DataSource secondaryDs) {
return new JdbcTemplate(secondaryDs);
}
Try accessing properties like this:尝试访问这样的属性:
@Resource(name = "primaryJdbcTemplate")
private JdbcTemplate primaryJdbcTemplate;
@Resource(name = "secondaryJdbcTemplate")
private JdbcTemplate secondaryJdbcTemplate;
primaryJdbcTemplate.query(“any-query-to-apply-on-primary-data-source”);
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