问题描述
我有一个应用程序，该应用程序需要连接到几个不同的架构，但都需要连接到同一类型(ORACLE).决定哪个模式来自UI.
如果用户选择了schema1，则实体应保留在Schema1中，如果选择其他，则其应位于所选的其他模式中.
Am使用Spring Boot + Hibernate并具有"spring-boot-starter-data-jpa"依赖项
我已经创建了如下所示的数据源类，以便可以在调用数据层之前每次更改数据源对象中的"schemaName".
@Component
public class SchemaDatasource extends AbstractDataSource {
private String schemaName;
@Autowired
private DSManager dsm;
public void setSchemaName(String schemaName) {
this.schemaName = schemaName;
}
@Override
public Connection getConnection() throws SQLException {
if (schemaName!= null)
return dsm.getConnection(schemaName);
else
return null;
}
@Override
public Connection getConnection(String username, String password) throws SQLException {
if (schemaName!= null)
return dsm.getConnection(schemaName);
else
return null;
}
}
我的问题是在启动过程中，"HibernateJpaAutoConfiguration"尝试创建sessionfactory.在创建过程中，它尝试检查与数据源的连接，但是由于schemaName在启动时为null，因此我的SchemaDatasource返回的null连接导致应用程序引导失败./p>
有没有办法解决这个问题.期望与SessionFactory相似，在休眠状态下没有选项.
如果还使用RoutingDatasource，则必须设置defaultDatasource.
Spring boot version: 1.5.9.RELEASE
这是我对DataSource的实现
public class DataSourceManager implements DataSource {
private Map<String, DataSource> dataSources = new HashMap<>();
private DataSource dataSource;
public DataSourceManager() {
}
public DataSourceManager(DataSource dataSource) {
this.dataSource = dataSource;
}
public void add(String name, DataSource dataSource) {
dataSources.put(name, dataSource);
}
public void switchDataSource(String name) {
dataSource = dataSources.get(name);
}
@Override
public PrintWriter getLogWriter() throws SQLException {
return dataSource.getLogWriter();
}
@Override
public void setLogWriter(PrintWriter out) throws SQLException {
dataSource.setLogWriter(out);
}
@Override
public void setLoginTimeout(int seconds) throws SQLException {
dataSource.setLoginTimeout(seconds);
}
@Override
public int getLoginTimeout() throws SQLException {
return dataSource.getLoginTimeout();
}
@Override
public Logger getParentLogger() throws SQLFeatureNotSupportedException {
return dataSource.getParentLogger();
}
@Override
public <T> T unwrap(Class<T> iface) throws SQLException {
return dataSource.unwrap(iface);
}
@Override
public boolean isWrapperFor(Class<?> iface) throws SQLException {
return dataSource.isWrapperFor(iface);
}
@Override
public Connection getConnection() throws SQLException {
return dataSource.getConnection();
}
@Override
public Connection getConnection(String username, String password) throws SQLException {
return dataSource.getConnection(username, password);
}
}
这是我的配置
@Configuration
public class DataSourceConfig {
@Autowired
private Environment env;
public DataSource makeDataSource(String name) {
return DataSourceBuilder.create()
.driverClassName(env.getProperty("spring.datasource." + name + ".driver-class-name"))
.url(env.getProperty("spring.datasource." + name + ".url")).build();
}
@Bean
public DataSource dataSource() {
DataSourceManager dataSourceManager = new DataSourceManager();
dataSourceManager.add("test1", makeDataSource("test1"));
dataSourceManager.add("test2", makeDataSource("test2"));
dataSourceManager.switchDataSource("test1");
return dataSourceManager;
}
}
这是application.yml
spring:
jpa:
hibernate:
ddl-auto: create
properties:
hibernate:
dialect: org.hibernate.dialect.H2Dialect
datasource:
test1:
name: test2
url: jdbc:h2:mem:testdb;DB_CLOSE_DELAY=-1;DB_CLOSE_ON_EXIT=FALSE
driver-class-name: org.h2.Driver
username: h2
password: h2
test2:
name: test1
url: jdbc:h2:mem:testdb;DB_CLOSE_DELAY=-1;DB_CLOSE_ON_EXIT=FALSE
driver-class-name: org.h2.Driver
username: h2
password: h2
I have an application that need to connect to few different schema's but everything of same type (ORACLE). The decision of which schema comes from UI.
if User selects schema1, then entity should persist in Schema1, if selects other, then it should be in the selected other schema.
Am using Spring boot + Hibernate with the dependency "spring-boot-starter-data-jpa"
I have created a datasource class like below so that i can change the "schemaName" in the datasource object everytime before invoking the data layer.
@Component
public class SchemaDatasource extends AbstractDataSource {
private String schemaName;
@Autowired
private DSManager dsm;
public void setSchemaName(String schemaName) {
this.schemaName = schemaName;
}
@Override
public Connection getConnection() throws SQLException {
if (schemaName!= null)
return dsm.getConnection(schemaName);
else
return null;
}
@Override
public Connection getConnection(String username, String password) throws SQLException {
if (schemaName!= null)
return dsm.getConnection(schemaName);
else
return null;
}
}
My problem is during the startup, the "HibernateJpaAutoConfiguration" tries creating sessionfactory.During creation it tries to check connection with the datasource But as schemaName is null in the startup, my SchemaDatasource returns null connection with which application bootstrap is failed.
is there a way to handle this. Am expecting similar to SessionFactory withnooptions in hibernate.
In case of RoutingDatasource also, i have to set defaultDatasource.
Spring boot version: 1.5.9.RELEASE
Here is my implementation of DataSource
public class DataSourceManager implements DataSource {
private Map<String, DataSource> dataSources = new HashMap<>();
private DataSource dataSource;
public DataSourceManager() {
}
public DataSourceManager(DataSource dataSource) {
this.dataSource = dataSource;
}
public void add(String name, DataSource dataSource) {
dataSources.put(name, dataSource);
}
public void switchDataSource(String name) {
dataSource = dataSources.get(name);
}
@Override
public PrintWriter getLogWriter() throws SQLException {
return dataSource.getLogWriter();
}
@Override
public void setLogWriter(PrintWriter out) throws SQLException {
dataSource.setLogWriter(out);
}
@Override
public void setLoginTimeout(int seconds) throws SQLException {
dataSource.setLoginTimeout(seconds);
}
@Override
public int getLoginTimeout() throws SQLException {
return dataSource.getLoginTimeout();
}
@Override
public Logger getParentLogger() throws SQLFeatureNotSupportedException {
return dataSource.getParentLogger();
}
@Override
public <T> T unwrap(Class<T> iface) throws SQLException {
return dataSource.unwrap(iface);
}
@Override
public boolean isWrapperFor(Class<?> iface) throws SQLException {
return dataSource.isWrapperFor(iface);
}
@Override
public Connection getConnection() throws SQLException {
return dataSource.getConnection();
}
@Override
public Connection getConnection(String username, String password) throws SQLException {
return dataSource.getConnection(username, password);
}
}
Here is my configuration
@Configuration
public class DataSourceConfig {
@Autowired
private Environment env;
public DataSource makeDataSource(String name) {
return DataSourceBuilder.create()
.driverClassName(env.getProperty("spring.datasource." + name + ".driver-class-name"))
.url(env.getProperty("spring.datasource." + name + ".url")).build();
}
@Bean
public DataSource dataSource() {
DataSourceManager dataSourceManager = new DataSourceManager();
dataSourceManager.add("test1", makeDataSource("test1"));
dataSourceManager.add("test2", makeDataSource("test2"));
dataSourceManager.switchDataSource("test1");
return dataSourceManager;
}
}
Here is application.yml
spring:
jpa:
hibernate:
ddl-auto: create
properties:
hibernate:
dialect: org.hibernate.dialect.H2Dialect
datasource:
test1:
name: test2
url: jdbc:h2:mem:testdb;DB_CLOSE_DELAY=-1;DB_CLOSE_ON_EXIT=FALSE
driver-class-name: org.h2.Driver
username: h2
password: h2
test2:
name: test1
url: jdbc:h2:mem:testdb;DB_CLOSE_DELAY=-1;DB_CLOSE_ON_EXIT=FALSE
driver-class-name: org.h2.Driver
username: h2
password: h2
这篇关于Spring Boot JPA中的动态数据源的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！