Added configuration class for the application

spring-all/src/main/java/org/baeldung/multi-tenancy/java/com/baeldung/multitenancy/MTConfig.java

@@ -0,0 +1,62 @@
+package com.baeldung.multitenancy;
+
+import org.hibernate.tool.hbm2ddl.SchemaExport;
+import com.baeldung.multitenancy.implementation;
+import javax.sql.DataSource;
+import java.io.IOException;
+import java.sql.Connection;
+import java.sql.SQLException;
+import java.util.Map;
+
+
+
+@Configuration
+public class MTConfig {
+
+    @Bean
+    public SessionFactoryBean sessionFactory(Map<String, DataSource> dataSourceMap, DataSource dataSource){
+
+        SessionFactoryBean sf = new SessionFactoryBean();
+        sf.setDataSourceMap(dataSourceMap);
+        sf.setDataSource(dataSource);
+
+        try{
+            Properties prop = new Properties();
+            prop.setProperty("hibernate.dialect", "org.hibernate.dialect.MySQLDialect");
+            prop.setProperty("hibernate.show_sql", "true");
+            prop.setProperty("hibernate.multiTenancy", "DATABASE");
+            prop.setProperty("hibernate.tenant_identifier_resolver", "currentSessionTenantIdentifierResolver");
+            prop.setProperty("hibernate.multi_tenant_connection_provider", "simpleMultiTenantConnectionProvider");
+
+            sf = new AnnotationConfiguration().setProperties(prop).configure().buildSessionFactory();
+            return sf;
+
+        } catch (Throwable ex) {
+            System.err.println("Failed to load the SessionFactory: " + ex);
+            throw new ExceptionInInitializerError(ex);
+        }
+
+    }
+
+    @Bean(name = "currentSessionTenantIdentifierResolver")
+    @Scope("request", proxyMode = ScopedProxyMode.INTERFACES)
+    public CurrentSessionTenantIdentifierResolver currentSessionTenantIdentifierResolver(){
+
+        CurrentSessionTenantIdentifierResolver cstir = new CurrentSessionTenantIdentifierResolver();
+        return cstir;
+
+    }
+
+    @Bean(name = "simpleMultiTenantConnectionProvider")
+    public SimpleMultiTenantConnectionProvider simpleMultiTenantConnectionProvider(Map<String, DataSource> dataSourceMap){
+
+        SimpleMultiTenantConnectionProvider smtcp = new SimpleMultiTenantConnectionProvider();
+        smtcp.setDataSourceMap(dataSourceMap);
+        return cstir;
+
+    }
+
+
+
+
+}