Question

我在下面的链接中进行了了解 “ https://medium.com/swlh/multi-tenancy-implementation-using-spring-boot-hibernate-6a8e3ecb251a”教程

package jpa.tenants;
import java.util.HashMap;
import java.util.Map;

import javax.annotation.PostConstruct;
import javax.sql.DataSource;

import org.hibernate.engine.jdbc.connections.spi.AbstractDataSourceBasedMultiTenantConnectionProviderImpl;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.ApplicationContext;
import org.springframework.stereotype.Component;

@SuppressWarnings("serial")
@Component
public class DataSourceBasedMultiTenantConnectionProviderImpl extends AbstractDataSourceBasedMultiTenantConnectionProviderImpl {
    @Autowired
    private DataSource defaultDS;

    @Autowired
    private ApplicationContext context;

    private Map<String, DataSource> map = new HashMap<>();

    boolean init = false;

    private String DEFAULT_TENANT_ID="1";

    @PostConstruct
    public void load() {
        map.put(DEFAULT_TENANT_ID, defaultDS);
    }

    @Override
    protected DataSource selectAnyDataSource() {
        return map.get(DEFAULT_TENANT_ID);
    }

    @Override
    protected DataSource selectDataSource(String tenantIdentifier) {
        if (!init) {
            init = true;
            TenantDataSource tenantDataSource = context.getBean(TenantDataSource.class);
            map.putAll(tenantDataSource.getAll());
        }
        return map.get(tenantIdentifier) != null ? map.get(tenantIdentifier) : map.get(DEFAULT_TENANT_ID);
    }
}

导致以下异常：

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in class path
资源[jpa / tenants / HibernateConfig.class]：调用init 方法失败；嵌套的异常是org.hibernate.AnnotationException：未为实体指定标识符：jpa.tenants.DataSourceConfig 在org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean（AbstractAutowireCapableBeanFactory.java:1796）〜[spring-beans-5.2.2.RELEASE.jar：5.2.2.RELEASE] 在org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean（AbstractAutowireCapableBeanFactory.java:595）〜[spring-beans-5.2.2.RELEASE.jar：5.2.2.RELEASE] 在org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean（AbstractAutowireCapableBeanFactory.java:517）〜[spring-beans-5.2.2.RELEASE.jar：5.2.2.RELEASE] 在org.springframework.beans.factory.support.AbstractBeanFactory.lambda $ doGetBean $ 0（AbstractBeanFactory.java:323）〜[spring-beans-5.2.2.RELEASE.jar：5.2.2.RELEASE] 在org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton（DefaultSingletonBeanRegistry.java:222）〜[spring-beans-5.2.2.RELEASE.jar：5.2.2.RELEASE] 在org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean（AbstractBeanFactory.java:321）〜[spring-beans-5.2.2.RELEASE.jar：5.2.2.RELEASE] 在org.springframework.beans.factory.support.AbstractBeanFactory.getBean（AbstractBeanFactory.java:202）〜[spring-beans-5.2.2.RELEASE.jar：5.2.2.RELEASE] 在org.springframework.context.support.AbstractApplicationContext.getBean（AbstractApplicationContext.java:1108）〜[spring-context-5.2.2.RELEASE.jar：5.2.2.RELEASE] 在org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization（AbstractApplicationContext.java:868）〜[spring-context-5.2.2.RELEASE.jar：5.2.2.RELEASE] 在org.springframework.context.support.AbstractApplicationContext.refresh（AbstractApplicationContext.java:550）〜[spring-context-5.2.2.RELEASE.jar：5.2.2.RELEASE] 在org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh（ServletWebServerApplicationContext.java:141）〜[spring-boot-2.2.2.RELEASE.jar：2.2.2.RELEASE] 在org.springframework.boot.SpringApplication.refresh（SpringApplication.java:747） [spring-boot-2.2.2.RELEASE.jar：2.2.2.RELEASE] 在org.springframework.boot.SpringApplication.refreshContext（SpringApplication.java:397） [spring-boot-2.2.2.RELEASE.jar：2.2.2.RELEASE] 在org.springframework.boot.SpringApplication.run（SpringApplication.java:315） [spring-boot-2.2.2.RELEASE.jar：2.2.2.RELEASE] 在org.springframework.boot.SpringApplication.run（SpringApplication.java:1226） [spring-boot-2.2.2.RELEASE.jar：2.2.2.RELEASE] 在org.springframework.boot.SpringApplication.run（SpringApplication.java:1215） [spring-boot-2.2.2.RELEASE.jar：2.2.2.RELEASE] 在jpa.JpaExample.main（JpaExample.java:10）[classes /：na] 在sun.reflect.NativeMethodAccessorImpl.invoke0（本机方法）〜[na：1.8.0_232] 在sun.reflect.NativeMethodAccessorImpl.invoke（NativeMethodAccessorImpl.java:62）〜[na：1.8.0_232] 在sun.reflect.DelegatingMethodAccessorImpl.invoke（DelegatingMethodAccessorImpl.java:43）〜[na：1.8.0_232] 在java.lang.reflect.Method.invoke（Method.java:498）〜[na：1.8.0_232] 在org.springframework.boot.devtools.restart.RestartLauncher.run（RestartLauncher.java:49） [spring-boot-devtools-2.2.2.RELEASE.jar：2.2.2.RELEASE] 原因：org.hibernate.AnnotationException：未为实体指定标识符：jpa.tenants.DataSourceConfig 在org.hibernate.cfg.InheritanceState.determineDefaultAccessType（InheritanceState.java:266）〜[hibernate-core-5.4.9.Final.jar：5.4.9.Final] 在org.hibernate.cfg.InheritanceState.getElementsToProcess（InheritanceState.java:211）〜[hibernate-core-5.4.9.Final.jar：5.4.9.Final] 在org.hibernate.cfg.AnnotationBinder.bindClass（AnnotationBinder.java:781）〜[hibernate-core-5.4.9.Final.jar：5.4.9.Final] 在org.hibernate.boot.model.source.internal.annotations.AnnotationMetadataSourceProcessorImpl.processEntityHierarchies（AnnotationMetadataSourceProcessorImpl.java:254）处〜[hibernate-core-5.4.9.Final.jar：5.4.9.Final] 在org.hibernate.boot.model.process.spi.MetadataBuildingProcess $ 1.processEntityHierarchies（MetadataBuildingProcess.java:230）〜[hibernate-core-5.4.9.Final.jar：5.4.9.Final] 在org.hibernate.boot.model.process.spi.MetadataBuildingProcess.complete（MetadataBuildingProcess.java:273）〜[hibernate-core-5.4.9.Final.jar：5.4.9.Final] 在org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.metadata（EntityManagerFactoryBuilderImpl.java:1202）〜[hibernate-core-5.4.9.Final.jar：5.4.9.Final] 在org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.build（EntityManagerFactoryBuilderImpl.java:1233）〜[hibernate-core-5.4.9.Final.jar：5.4.9.Final] 在org.springframework.orm.jpa.vendor.SpringHibernateJpaPersistenceProvider.createContainerEntityManagerFactory（SpringHibernateJpaPersistenceProvider.java:58）处〜[spring-orm-5.2.2.RELEASE.jar：5.2.2.RELEASE] 在org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.createNativeEntityManagerFactory（LocalContainerEntityManagerFactoryBean.java:365）〜[spring-orm-5.2.2.RELEASE.jar：5.2.2.RELEASE] 在org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.buildNativeEntityManagerFactory（AbstractEntityManagerFactoryBean.java:391）〜[spring-orm-5.2.2.RELEASE.jar：5.2.2.RELEASE] 在org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.afterPropertiesSet（AbstractEntityManagerFactoryBean.java:378）〜[spring-orm-5.2.2.RELEASE.jar：5.2.2.RELEASE] 在org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.afterPropertiesSet（LocalContainerEntityManagerFactoryBean.java:341）〜[spring-orm-5.2.2.RELEASE.jar：5.2.2.RELEASE] 在org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods（AbstractAutowireCapableBeanFactory.java:1855）〜[spring-beans-5.2.2.RELEASE.jar：5.2.2.RELEASE] 在org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean（AbstractAutowireCapableBeanFactory.java:1792）〜[spring-beans-5.2.2.RELEASE.jar：5.2.2.RELEASE] ...省略了21个常见框架

    'This is my DataSourceConfig Class:-'

    package jpa.tenants;

    import javax.persistence.Column;
    import javax.persistence.Entity;
    import javax.persistence.GeneratedValue;
    import javax.persistence.GenerationType;

    import org.hibernate.annotations.Table;
    import org.springframework.data.annotation.Id;

    import com.fasterxml.jackson.annotation.JsonIgnore;

    @Entity
    @Table(appliesTo= "DATASOURCECONFIG")
    public class DataSourceConfig {

        @Id
        @JsonIgnore
        @Column(name="id", nullable=false)
        @GeneratedValue(strategy = GenerationType.AUTO)
        private Long id;

        private String name;
        private String url;
        private String username;
        private String password;
        private String driverClassName;
        private boolean initialize;

        public Long getId() {
            return id;
        }

        public void setId(Long id) {
            this.id = id;
        }

        public String getName() {
            return name;
        }

        public void setName(String name) {
            this.name = name;
        }

        public String getUrl() {
            return url;
        }

        public void setUrl(String url) {
            this.url = url;
        }

        public String getUsername() {
            return username;
        }

        public void setUsername(String username) {
            this.username = username;
        }

        public String getPassword() {
            return password;
        }

        public void setPassword(String password) {
            this.password = password;
        }

        public String getDriverClassName() {
            return driverClassName;
        }

        public void setDriverClassName(String driverClassName) {
            this.driverClassName = driverClassName;
        }

        public boolean isInitialize() {
            return initialize;
        }

        public void setInitialize(boolean initialize) {
            this.initialize = initialize;
        }
    }

    ----------------------------------------


----------


   ' Any help is highly appriciated thanks..'

Answer 1

类Id中的DataSourceConfig注释是从错误的包中导入的：

import org.springframework.data.annotation.Id;

必须是

import javax.persistence.Id;

异常：org.hibernate.AnnotationException：未为实体指定标识符：jpa.tenants.DataSourceConfig

1 个答案: