java - Spring + Hibernate 的 Multi-Tenancy : "SessionFactory configured for multi-tenancy, but no tenant identifier specified"

Question

在 Spring 3 应用程序中，我试图通过 Hibernate 4 的原生 MultiTenantConnectionProvider 实现 Multi-Tenancy 。和 CurrentTenantIdentifierResolver .我看到 there was a problem with this in Hibernate 4.1.3 ，但我正在运行 4.1.9 并且仍然遇到类似的异常:

   Caused by:

org.hibernate.HibernateException: SessionFactory configured for multi-tenancy, but no tenant identifier specified
    at org.hibernate.internal.AbstractSessionImpl.<init>(AbstractSessionImpl.java:84)
    at org.hibernate.internal.SessionImpl.<init>(SessionImpl.java:239)
    at org.hibernate.internal.SessionFactoryImpl$SessionBuilderImpl.openSession(SessionFactoryImpl.java:1597)
    at org.hibernate.internal.SessionFactoryImpl.openSession(SessionFactoryImpl.java:963)
    at org.springframework.orm.hibernate4.HibernateTransactionManager.doBegin(HibernateTransactionManager.java:328)
    at org.springframework.transaction.support.AbstractPlatformTransactionManager.getTransaction(AbstractPlatformTransactionManager.java:371)
    at org.springframework.transaction.interceptor.TransactionAspectSupport.createTransactionIfNecessary(TransactionAspectSupport.java:334)
    at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:105)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
    at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:631)
    at com.afflatus.edu.thoth.repository.UserRepository$$EnhancerByCGLIB$$c844ce96.getAllUsers(<generated>)
    at com.afflatus.edu.thoth.service.UserService.getAllUsers(UserService.java:29)
    at com.afflatus.edu.thoth.HomeController.hello(HomeController.java:37)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:601)
    at org.springframework.web.method.support.InvocableHandlerMethod.invoke(InvocableHandlerMethod.java:219)
    at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:132)
    at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:104)
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandleMethod(RequestMappingHandlerAdapter.java:746)
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:687)
    at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:80)
    at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:925)
    at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:856)
    at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:915)
    at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:811)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:735)
    at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:796)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:848)
    at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:671)
    at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:448)
    at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:138)
    at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:564)
    at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:213)
    at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1070)
    at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:375)
    at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:175)
    at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1004)
    at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:136)
    at org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:258)
    at org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:109)
    at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:97)
    at org.eclipse.jetty.server.Server.handle(Server.java:439)
    at org.eclipse.jetty.server.HttpChannel.run(HttpChannel.java:246)
    at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:265)
    at org.eclipse.jetty.io.AbstractConnection$ReadCallback.run(AbstractConnection.java:240)
    at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:589)
    at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:520)
    at java.lang.Thread.run(Thread.java:722) enter code here

下面是相关代码。在 MultiTenantConnectionProvider 中，我现在只是简单地编写了一些愚蠢的代码，每次只返回一个新的连接，而 CurrentTenantIdentifierResolver 在这一点上总是返回相同的 ID。显然，这个逻辑是在我设法让连接实例化之后实现的。

config.xml

<bean id="sessionFactory" class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
    <property name="dataSource" ref="dataSource" />
    <property name="packagesToScan">
        <list>
            <value>com.afflatus.edu.thoth.entity</value>
        </list>
    </property>
    <property name="hibernateProperties">
        <props>
            <prop key="hibernate.dialect">${hibernate.dialect}</prop>
            <prop key="hibernate.show_sql">${hibernate.show_sql}</prop>
            <prop key="hibernate.hbm2ddl">${hibernate.dbm2ddl}</prop>
            <prop key="hibernate.multiTenancy">DATABASE</prop>
            <prop key="hibernate.multi_tenant_connection_provider">com.afflatus.edu.thoth.connection.MultiTenantConnectionProviderImpl</prop>
            <prop key="hibernate.tenant_identifier_resolver">com.afflatus.edu.thoth.context.MultiTenantIdentifierResolverImpl</prop>
        </props>
    </property>
</bean>

<bean id="transactionManager" class="org.springframework.orm.hibernate4.HibernateTransactionManager">
    <property name="autodetectDataSource" value="false" />
    <property name="sessionFactory" ref="sessionFactory" />
</bean>

MultiTenantConnectionProvider.java

package com.afflatus.edu.thoth.connection;

import java.util.Properties;
import java.util.HashMap;
import java.util.Map;

import org.hibernate.service.jdbc.connections.spi.AbstractMultiTenantConnectionProvider;
import org.hibernate.service.jdbc.connections.spi.ConnectionProvider;
import org.hibernate.ejb.connection.InjectedDataSourceConnectionProvider;
import org.springframework.jdbc.datasource.DriverManagerDataSource;
import org.hibernate.cfg.*;

public class MultiTenantConnectionProviderImpl extends AbstractMultiTenantConnectionProvider {

    private final Map<String, ConnectionProvider> connectionProviders
        = new HashMap<String, ConnectionProvider>();

    @Override
    protected ConnectionProvider getAnyConnectionProvider() {

        System.out.println("barfoo");
        Properties properties = getConnectionProperties();

        DriverManagerDataSource ds = new DriverManagerDataSource();
        ds.setDriverClassName("com.mysql.jdbc.Driver");
        ds.setUrl("jdbc:mysql://127.0.0.1:3306/test");
        ds.setUsername("root");
        ds.setPassword("");

        InjectedDataSourceConnectionProvider defaultProvider = new InjectedDataSourceConnectionProvider();
        defaultProvider.setDataSource(ds);
        defaultProvider.configure(properties);

        return (ConnectionProvider) defaultProvider;
    }


    @Override
    protected ConnectionProvider selectConnectionProvider(String tenantIdentifier) {
        System.out.println("foobar");
        Properties properties = getConnectionProperties();

        DriverManagerDataSource ds = new DriverManagerDataSource();
        ds.setDriverClassName("com.mysql.jdbc.Driver");
        ds.setUrl("jdbc:mysql://127.0.0.1:3306/test2");
        ds.setUsername("root");
        ds.setPassword("");

        InjectedDataSourceConnectionProvider defaultProvider = new InjectedDataSourceConnectionProvider();
        defaultProvider.setDataSource(ds);
        defaultProvider.configure(properties);

        return (ConnectionProvider) defaultProvider;
    }

    private Properties getConnectionProperties() {
        Properties properties = new Properties();
        properties.put(AvailableSettings.DIALECT, "org.hibernate.dialect.MySQLDialect");
        properties.put(AvailableSettings.DRIVER, "com.mysql.jdbc.Driver");
        properties.put(AvailableSettings.URL, "jdbc:mysql://127.0.0.1:3306/test");
        properties.put(AvailableSettings.USER, "root");
        properties.put(AvailableSettings.PASS, "");

        return properties;

    }
}

CurrentTenantIdentifierResolver.java

package com.afflatus.edu.thoth.context;

import org.hibernate.context.spi.CurrentTenantIdentifierResolver;

public class CurrentTenantIdentifierResolverImpl implements CurrentTenantIdentifierResolver {

    public String resolveCurrentTenantIdentifier() {
        return "1";
    }

    public boolean validateExistingCurrentSessions() {
        return true;
    }

}

有人能看出什么特别的错误吗？一旦打开事务，就会引发异常。 似乎 SessionFactory 没有正确打开 Session，或者 Session 只是忽略了 CurrentTenantIdentifierResolver< 返回的值，我认为这是 Hibernate 4.1.3 中的问题；这应该已经解决了。

Answer 1

您是否在代码中的任何位置使用 @Transactional(即标记服务或 dao 类/方法)？
在我注释掉服务类中的 @Transactional 之前，我遇到了同样的错误。
我认为这与 Hibernate 4 的默认 openSessionInThread 行为有关。

我还配置了 hibernate ，但没有自定义实现 ConnectionProvider 和 TenantIdentifierResolver。我正在使用基于 jndi 的方法，将 hibernate.connection.datasource 设置为 java://comp/env/jdbc/，然后将 jndi 资源的名称传入我的 dao 方法, 调用

sessionFactory.withOptions().tenantIdentifier(tenant).openSession();

我仍在尝试是否可以使用 @Transactional 获得配置，但线程行为中默认 session 的基于 jndi 的方法现在似乎正在工作。