租户解析器的camelContext属性鉴别器,使用jpa多租户和camel routeId

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【中文标题】租户解析器的camelContext属性鉴别器,使用jpa多租户和camel routeId【英文标题】:camelContext attribute discriminator for tenant resolver , using jpa multitenant and camel routeId 【发布时间】:2018-02-06 13:22:10 【问题描述】:

我问你如何使用 camelContext 来获取事件触发的路由名称,更详细地说,我如何在 camelContext 中使用任何类型的鉴别器属性 x 进行谓词决策(如果 x =1 则 .. else . .) 例如:

我有这种路线:

//this route use the forst database
    from("direct:csvprocessor1")
        .routeId("tenant1")
        .from("file:src/main/resources/data/1?move=OUT&moveFailed=REFUSED")
        .unmarshal(csv)
        .to("bean:myCsvHandler?method=doHandleCsvData")
        .setBody(constant("OK VB"))
        .setHeader(Exchange.HTTP_RESPONSE_CODE, constant(200))
        .setHeader(Exchange.CONTENT_TYPE, constant("text/html")); 

还有这条其他路线:

//this route use tenant2, the second database
    from("direct:csvprocessor1")
        .routeId("tenant2")
        .from("file:src/main/resources/data/2?move=OUT&moveFailed=REFUSED")
        .unmarshal(csv)
        .to("bean:myCsvHandler?method=doHandleCsvData")
        .setBody(constant("OK 2"))
        .setHeader(Exchange.HTTP_RESPONSE_CODE, constant(200))
        .setHeader(Exchange.CONTENT_TYPE, constant("text/html"));

当我在 1 文件夹中拾取文件时,名为“tenant1”的第一条路线开始,在 2 中拾取文件时发生同样的情况,第二条路线tenant2 开始。它读取 csv 内容,内容必须使用 jpa 写入正确的租户X(数据库)

我必须在另一个类中检索 routeid 名称,但是这个类在骆驼上下文启动之前实例化,所以我不能注入上下文(因为这个类“BatchCurrentTenantIdentifierResolverImpl”属于 Spring 数据库初始化器)。我尝试添加方法“of”来设置camelContext,但我只得到tenant1,也是在路由2启动时,所以不能从租户切换到另一个租户(租户是数据库,我有两个数据库):

@Component
public class BatchTenantContext 


    private static final Logger log = LoggerFactory.getLogger(BatchTenantContext.class);

    // don't Inject, use method Of because injecton was null
    CamelContext cctx;

    public BatchTenantContext()getInstance();

    private final static BatchTenantContext instance = new BatchTenantContext();

    public static BatchTenantContext getInstance()
        return instance;
    

    public synchronized String get() 
        if (cctx != null)
            Route val = cctx.getRoute("tenant1");
            if (val == null)
                val = cctx.getRoute("tenant2");
                if (val == null)
                    return "";
                
                else 
                    return "tenant_2";
                
            
            else return "tenant_1";
        
        return "";
    

    public synchronized void of(CamelContext ctx)
        cctx = ctx;
    

    public CamelContext getCamelContext()
    
        return cctx;
    




//multitenant approach, switch from one database to another 
//based on BatchTenantContext resolution..
    public class BatchCurrentTenantIdentifierResolverImpl implements CurrentTenantIdentifierResolver 

        static final Logger log = LoggerFactory.getLogger(BatchCurrentTenantIdentifierResolverImpl.class);


        @Override
        public String resolveCurrentTenantIdentifier() 
            String val = BatchTenantContext.getInstance().get();
            log.info("*** get tenant " + val);
            return val;
        

        @Override
        public boolean validateExistingCurrentSessions() 
            return true;
        

    

那么,怎么知道路由火呢?请注意,上面的课程是单例的..我的方式正确吗? 我使用 jpa whitin hibernate 提供程序,使用 rhe 多租户配置进行配置,如下所示:http://tech.asimio.net/2017/01/17/Multitenant-applications-using-Spring-Boot-JPA-Hibernate-and-Postgres.html 该应用程序在 spring-boot 运行时环境或 Tomcat 应用服务器中工作。

关于所有的任何想法?

非常感谢!

罗比

我添加了这段代码:

    @Configuration
    @EnableConfigurationProperties( MultiTenantAfSissProperties.class, JpaProperties.class )
    @ImportResource(locations =  "classpath:applicationContent.xml" )
    @EnableTransactionManagement
    public class MultiTenantJpaConfiguration 

        static final Logger logger = LoggerFactory.getLogger(MultiTenantJpaConfiguration.class);

        @Inject
        private JpaProperties jpaProperties;

        @Inject
        MultiTenantAFSISSProperties multiTenantAFSISSProperties; //lista dei datasources collegati ai tenant

        @Bean
        public Map<String, DataSource> dataSourceRetrieval()
            Map<String, DataSource> result = new HashMap<>();
            for (DataSourceProperties dsProperties : this.multiTenantAFSISSProperties.getDataSources()) 
                DataSourceBuilder factory = DataSourceBuilder
                    .create()
                    .url(dsProperties.getUrl())
                    .username(dsProperties.getUsername())
                    .password(dsProperties.getPassword())
                    .driverClassName(dsProperties.getDriverClassName());
                result.put(dsProperties.getTenantId(), factory.build());
            
            return result;
        

        /**
         * 
         * @return
         */
        @Bean
        public MultiTenantConnectionProvider multiTenantConnectionProvider()
            return new AfsissMultiTenantConnectionProviderImpl();
        

        /**
         * 
         * @return
         */
        @Bean 
        public CurrentTenantIdentifierResolver currentTenantIdentifierResolver()
            return new BatchCurrentTenantIdentifierResolverImpl();
        

        /**
         *  
         * @param multiTenantConnectionProvider
         * @param currentTenantIdentifierResolver
         * @return
         */
        @Bean
        public LocalContainerEntityManagerFactoryBean entityManagerFactoryBean(MultiTenantConnectionProvider multiTenantConnectionProvider,
            CurrentTenantIdentifierResolver currentTenantIdentifierResolver) 

            Map<String, Object> hibernateProps = new LinkedHashMap<>();
            hibernateProps.putAll(this.jpaProperties.getProperties());

            Map<String,String> all = this.jpaProperties.getProperties();
            for ( Map.Entry<String, String> prop : all.entrySet())
                System.out.println(" " + prop.getKey() + " = " + prop.getValue());
            

            hibernateProps.put(Environment.MULTI_TENANT, MultiTenancyStrategy.DATABASE);
            hibernateProps.put(Environment.MULTI_TENANT_CONNECTION_PROVIDER, multiTenantConnectionProvider);
            hibernateProps.put(Environment.MULTI_TENANT_IDENTIFIER_RESOLVER, currentTenantIdentifierResolver);

            // No dataSource is set to resulting entityManagerFactoryBean
            LocalContainerEntityManagerFactoryBean result = new LocalContainerEntityManagerFactoryBean();
            result.setPackagesToScan(new String[]  AfFileEntity.class.getPackage().getName() ); 
            result.setJpaVendorAdapter(new HibernateJpaVendorAdapter());
            result.setJpaPropertyMap(hibernateProps);

            return result;
        

        /**
         * crea la factory per ricavare l'entity manager
         * @param entityManagerFactoryBean
         * @return
         */
        @Bean
        public EntityManagerFactory entityManagerFactory(LocalContainerEntityManagerFactoryBean entityManagerFactoryBean) 
            return entityManagerFactoryBean.getObject();
        

        /**
         * get transaction manager 
* @param entityManagerFactory
         * @return
         */
        @Bean
        public PlatformTransactionManager txManager(EntityManagerFactory entityManagerFactory) 
            SessionFactory sessionFactory = entityManagerFactory.unwrap(SessionFactory.class);
            HibernateTransactionManager result = new HibernateTransactionManager();
            result.setAutodetectDataSource(false);
            result.setSessionFactory(sessionFactory);
            return result;
        




在 applicationContent.xml 中:

<jpa:repositories base-package="com.xxx.dao" transaction-manager-ref="txManager" />
<tx:annotation-driven transaction-manager="txManager" proxy-target-class="true" />

每次我在 csvHanlder 中使用实体管理器和事务管理器时,spring 事务管理器都会在上面的 currentTenantIdentifierResolver() 方法中调用 BatchCurrentTenantIdentifierResolverImpl 类:

@Component
@Transactional(propagation = Propagation.REQUIRED)
public class MyCsvHandler 

    @Inject
    AFMOVCrudRepository _entitymanagerMov; //it extends JpaRepository

    @Inject
    AFVINCCrudRepository _entityManagerVINC;//it extends JpaRepository


    @Inject
    AFFileCrudRepository _entityManagerAfFile;//it extends JpaRepository




    static final Logger logger = LoggerFactory.getLogger(MyCsvHandler.class);



//save csv data on the right table on the right tenant
    public void doHandleCsvData(List<List<String>> csvData) throws FileNotEvaluableException
    
        //System.out.println("stampo..");
        boolean status = true;
            if (csvData.size() > 0)
            AfFileEntity afbean = new AfFileEntity();
            afbean.setNomeFile("test");
            afbean.setDataImport(new java.sql.Timestamp(System.currentTimeMillis()));
            afbean.setTipoFile("M");
            afbean.setAfStatoFlusso("I");

            _entityManagerAfFile.save(afbean);

            long pkfile = afbean.getId();
            logger.info("pkfile: " + pkfile);

            int i = 1; 
            logger.info("file size:" + csvData.size());
            for (List<String> rows : csvData)

                //for (int j = 0; i < rows.size(); j++)
                if (rows.get(2).trim().equalsIgnoreCase(...)) 
                    MovEntity mbean = new MovEntity();
                    setMovFields(mbean, rows);
                    mbean.setAfFileId(afbean);
                    logger.info(String.valueOf((i++)) +  " " + mbean);

                    _entitymanagerMov.save(mbean);
                
                else if (rows.get(2).trim().equalsIgnoreCase(..) || rows.get(2).trim().equalsIgnoreCase(..) )  
                    VincEntity vincBean = new VincEntity();  
                    setVincFields(vincBean, rows);
                    vincBean.setAfFileId(afbean);

                    logger.info(String.valueOf((i++)) +  " " + vincBean);

                    _entityManagerVINC.save(vincBean);
                   
                else 
                    status = false;
                    break;
                
            
             if (!status) throw new FileNotEvaluableException("error file format");
        

    

    private void setVincFields(VincEntity vincBean, List<String> rows) 
        vincBean.setXXX().. and others methods
    

    private void setMovFields(MovEntity mbean, List<String> rows) 
        mbean.setStxxx() and other .. methods

    
            return new 

【问题讨论】:

您是否希望使用BatchTenantContext 中的同步获取方法获取“当前正在执行的路由”?那是行不通的。你总是得到tenant_1,因为这就是你实现get方法的方式。 CamelContext.getRoute("id") 退出时返回路由。在您的情况下,两条路线都存在。如果您反转代码并首先检查tenant_2,您将始终得到它。它不会返回当前正在执行的路由。 @Gautam ,是的,我希望获得当前正在执行的路线,但我还没有弄清楚如何......有人可以帮我一些建议吗?谢谢 如果你能更好地解释你的流程。我在这里的理解是,您有两个目录 1 和 2,并且根据文件到达那里的时间,触发您的一条路线。该路由调用myCsvHandler,您可能正在尝试将数据插入两个租户之一。 BatchCurrentTenantIdentifierResolverImpl 究竟是如何使用的? bean myCsvHandler 是否调用此类上的方法来确定当前租户?在您的第一个路由中,将消息头添加为租户_1,在第二个路由中添加一个租户_2。然后在你的 bean myCsvHandler 中使用 Exchange 中的那个。 @Gautam 我为您的问题添加代码。对 BatchCurrentTenantIdentifierResolverImpl 的应用程序调用发生在 myCsvHanlder 方法调用之前。我发布的链接使用 threadlocal 来获取上下文,因为它是一个 Web servlet 应用程序。但是我的路由不是休息或休息调用...所以我必须保留其他方法的上下文缓存..但我不是骆驼专家.. 这个BatchCurrentTenantIdentifierResolverImpl调用什么时候发生在路由中?在处理路由时还调用了这个类的什么方法?在您的路线中看不到。 【参考方案1】:

您的路线中有这样的东西

from("direct:csvprocessor1").routeId("tenant2").process((Exchange e)-> 
                BatchCurrentTenantIdentifierResolverImpl.tenant.set("tenant_1");
            )
        .from("file:src/main/resources/data/2?move=OUT&moveFailed=REFUSED")
        .unmarshal().csv()
        .to("bean:myCsvHandler?method=doHandleCsvData")
        .setBody(constant("OK 2"))
        .setHeader(Exchange.HTTP_RESPONSE_CODE, constant(200))
        .setHeader(Exchange.CONTENT_TYPE, constant("text/html"));

并在您的BatchCurrentTenantIdentifierResolverImpl 中将其实现为public

class BatchCurrentTenantIdentifierResolverImpl 
    public static ThreadLocal<String> tenant = new ThreadLocal<String>();
    static final Logger log = LoggerFactory.getLogger(BatchCurrentTenantIdentifierResolverImpl.class);


    @Override
    public String resolveCurrentTenantIdentifier() 
        String val = tenant.get();
        log.info("*** get tenant " + val);
        return val;
    

    @Override
    public boolean validateExistingCurrentSessions() 
        return true;
           

【讨论】:

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