引入多数据源及内存数据库

src/main/java/com/gzzn/omms/msgexchangeapi/config/SecondaryConfig.java

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+package com.gzzn.omms.msgexchangeapi.config;
+
+import java.util.Map;
+
+import javax.persistence.EntityManager;
+import javax.sql.DataSource;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.beans.factory.annotation.Qualifier;
+import org.springframework.boot.autoconfigure.orm.jpa.JpaProperties;
+import org.springframework.boot.orm.jpa.EntityManagerFactoryBuilder;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.data.jpa.repository.config.EnableJpaRepositories;
+import org.springframework.orm.jpa.JpaTransactionManager;
+import org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean;
+import org.springframework.transaction.PlatformTransactionManager;
+import org.springframework.transaction.annotation.EnableTransactionManagement;
+
+@Configuration
+@EnableTransactionManagement
+@EnableJpaRepositories(
+ entityManagerFactoryRef="entityManagerFactorySecondary",
+ transactionManagerRef="transactionManagerSecondary", 
+ basePackages= { "com.gzzn.omms.msgexchangeapi.domain.secondary.dao" }
+ ) //设置Repository所在位置 
+
+  public class SecondaryConfig 
+  { 
+   @Autowired
+   @Qualifier("secondaryDataSource")
+   private DataSource secondaryDataSource;
+
+   @Bean(name = "entityManagerSecondary") 
+   public EntityManager entityManager(EntityManagerFactoryBuilder builder) 
+   { 
+     return entityManagerFactorySecondary(builder).getObject().createEntityManager(); 
+   }
+
+   @Bean(name = "entityManagerFactorySecondary") 
+   public LocalContainerEntityManagerFactoryBean 
+   entityManagerFactorySecondary (EntityManagerFactoryBuilder builder) 
+   { 
+     return builder 
+     .dataSource(secondaryDataSource)
+     .properties(getVendorProperties(secondaryDataSource))
+     .packages("com.gzzn.omms.msgexchangeapi.domain.secondary.entity") //设置实体类所在位置 
+     .persistenceUnit("secondaryPersistenceUnit")
+     .build(); 
+    } 
+
+    @Autowired 
+    private JpaProperties jpaProperties;
+    private Map<String, String> getVendorProperties(DataSource dataSource) 
+    { 
+     return jpaProperties.getHibernateProperties(dataSource);
+    } 
+
+    @Bean(name = "transactionManagerSecondary") 
+    PlatformTransactionManager   transactionManagerSecondary(EntityManagerFactoryBuilder builder)
+    { 
+      return new JpaTransactionManager(entityManagerFactorySecondary(builder).getObject()); 
+    } 
+  }