微服务项目配置多数据源的详细配置
时间: 2023-09-03 09:13:28 浏览: 49
微服务项目中配置多数据源的步骤相对较为复杂,需要涉及到多个技术栈的配置和整合。以下是一个微服务项目中配置多数据源的详细配置步骤:
1. 在各个微服务的配置文件中,定义不同的数据源:
```
# 微服务A的配置文件
spring.datasource.url=jdbc:mysql://localhost:3306/db1
spring.datasource.username=root
spring.datasource.password=123456
# 微服务B的配置文件
custom.datasource.url=jdbc:mysql://localhost:3306/db2
custom.datasource.username=root
custom.datasource.password=123456
```
2. 在每个微服务的代码中,创建对应的数据源对象:
```
@Configuration
public class DataSourceConfig {
@Bean(name = "primaryDataSource")
@Primary
@ConfigurationProperties(prefix = "spring.datasource")
public DataSource primaryDataSource() {
return DataSourceBuilder.create().build();
}
@Bean(name = "secondaryDataSource")
@ConfigurationProperties(prefix = "custom.datasource")
public DataSource secondaryDataSource() {
return DataSourceBuilder.create().build();
}
}
```
3. 在每个微服务的代码中,配置事务管理器:
```
@Configuration
@EnableTransactionManagement
public class TransactionConfig {
@Autowired
@Qualifier("primaryDataSource")
private DataSource primaryDataSource;
@Autowired
@Qualifier("secondaryDataSource")
private DataSource secondaryDataSource;
@Bean(name = "primaryTransactionManager")
@Primary
public DataSourceTransactionManager primaryTransactionManager() {
return new DataSourceTransactionManager(primaryDataSource);
}
@Bean(name = "secondaryTransactionManager")
public DataSourceTransactionManager secondaryTransactionManager() {
return new DataSourceTransactionManager(secondaryDataSource);
}
}
```
4. 在每个微服务的代码中,配置数据源和事务管理器的关联:
```
@Configuration
@EnableJpaRepositories(
basePackages = "com.example.a.repository",
entityManagerFactoryRef = "primaryEntityManagerFactory",
transactionManagerRef = "primaryTransactionManager"
)
public class PrimaryDataSourceConfig {
@Autowired
@Qualifier("primaryDataSource")
private DataSource primaryDataSource;
@Bean(name = "primaryEntityManagerFactory")
@Primary
public LocalContainerEntityManagerFactoryBean primaryEntityManagerFactory(EntityManagerFactoryBuilder builder) {
return builder
.dataSource(primaryDataSource)
.packages("com.example.a.entity")
.persistenceUnit("primary")
.build();
}
}
```
```
@Configuration
@EnableJpaRepositories(
basePackages = "com.example.b.repository",
entityManagerFactoryRef = "secondaryEntityManagerFactory",
transactionManagerRef = "secondaryTransactionManager"
)
public class SecondaryDataSourceConfig {
@Autowired
@Qualifier("secondaryDataSource")
private DataSource secondaryDataSource;
@Bean(name = "secondaryEntityManagerFactory")
public LocalContainerEntityManagerFactoryBean secondaryEntityManagerFactory(EntityManagerFactoryBuilder builder) {
return builder
.dataSource(secondaryDataSource)
.packages("com.example.b.entity")
.persistenceUnit("secondary")
.build();
}
}
```
5. 在每个微服务的代码中,使用对应的数据源:
```
@Service
public class UserService {
@Autowired
@Qualifier("primaryEntityManagerFactory")
private EntityManagerFactory primaryEntityManagerFactory;
@Autowired
@Qualifier("secondaryEntityManagerFactory")
private EntityManagerFactory secondaryEntityManagerFactory;
@Transactional("primaryTransactionManager")
public void addUser(User user) {
EntityManager em = primaryEntityManagerFactory.createEntityManager();
// ...
}
@Transactional("secondaryTransactionManager")
public void updateUser(User user) {
EntityManager em = secondaryEntityManagerFactory.createEntityManager();
// ...
}
}
```
以上是一个微服务项目中配置多数据源的详细配置步骤,需要注意的是,不同的微服务可能需要不同的配置,具体实现可能会有所不同。