add transaction-base-seata-spring-namespace-example.

    <modules>

        <module>transaction-base-seata-raw-jdbc-example</module>

        <module>transaction-base-seata-spring-boot-example</module>

        <module>transaction-base-seata-spring-namespace-example</module>

    </modules>

    <dependencies>

<?xml version="1.0" encoding="UTF-8"?>

<!--

  ~ Licensed to the Apache Software Foundation (ASF) under one or more

  ~ contributor license agreements.  See the NOTICE file distributed with

  ~ this work for additional information regarding copyright ownership.

  ~ The ASF licenses this file to You under the Apache License, Version 2.0

  ~ (the "License"); you may not use this file except in compliance with

  ~ the License.  You may obtain a copy of the License at

  ~

  ~     http://www.apache.org/licenses/LICENSE-2.0

  ~

  ~ Unless required by applicable law or agreed to in writing, software

  ~ distributed under the License is distributed on an "AS IS" BASIS,

  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

  ~ See the License for the specific language governing permissions and

  ~ limitations under the License.

  -->

<project xmlns="http://maven.apache.org/POM/4.0.0"

         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">

    <modelVersion>4.0.0</modelVersion>

    <parent>

        <groupId>org.apache.shardingsphere.example</groupId>

        <artifactId>transaction-base-seata-example</artifactId>

        <version>4.0.0-RC2-SNAPSHOT</version>

    </parent>

    <artifactId>transaction-base-seata-spring-namespace-example</artifactId>

    <dependencies>

        <dependency>

            <groupId>org.apache.shardingsphere.example</groupId>

            <artifactId>repository-mybatis</artifactId>

            <version>${project.version}</version>

        </dependency>

        <dependency>

            <groupId>org.apache.shardingsphere</groupId>

            <artifactId>sharding-transaction-base-seata-at</artifactId>

        </dependency>

        <dependency>

            <groupId>org.apache.shardingsphere</groupId>

            <artifactId>sharding-jdbc-spring-namespace</artifactId>

        </dependency>

        <dependency>

            <groupId>io.shardingsphere</groupId>

            <artifactId>sharding-transaction-jdbc-spring</artifactId>

        </dependency>

        <dependency>

            <groupId>org.aspectj</groupId>

            <artifactId>aspectjweaver</artifactId>

        </dependency>

        <dependency>

            <groupId>org.springframework</groupId>

            <artifactId>spring-context-support</artifactId>

        </dependency>

        <dependency>

            <groupId>org.mybatis</groupId>

            <artifactId>mybatis</artifactId>

        </dependency>

        <dependency>

            <groupId>org.mybatis</groupId>

            <artifactId>mybatis-spring</artifactId>

        </dependency>

        <dependency>

            <groupId>org.springframework</groupId>

            <artifactId>spring-jdbc</artifactId>

        </dependency>

    </dependencies>

</project>

 No newline at end of file

/*

 * Licensed to the Apache Software Foundation (ASF) under one or more

 * contributor license agreements.  See the NOTICE file distributed with

 * this work for additional information regarding copyright ownership.

 * The ASF licenses this file to You under the Apache License, Version 2.0

 * (the "License"); you may not use this file except in compliance with

 * the License.  You may obtain a copy of the License at

 *

 *     http://www.apache.org/licenses/LICENSE-2.0

 *

 * Unless required by applicable law or agreed to in writing, software

 * distributed under the License is distributed on an "AS IS" BASIS,

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 * See the License for the specific language governing permissions and

 * limitations under the License.

 */

package org.apache.shardingsphere.example.transaction.base.seata.spring.namespace;

import org.apache.shardingsphere.example.common.mybatis.service.SpringPojoService;

import org.apache.shardingsphere.transaction.annotation.ShardingTransactionType;

import org.apache.shardingsphere.transaction.core.TransactionType;

import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.stereotype.Component;

import org.springframework.transaction.annotation.Transactional;

@Component

public class SeataTransactionalService {

    private final SpringPojoService springPojoService;

    @Autowired

    public SeataTransactionalService(final SpringPojoService jpaCommonService) {

        this.springPojoService = jpaCommonService;

    }

    public void initEnvironment() {

        springPojoService.initEnvironment();

    }

    public void cleanEnvironment() {

        springPojoService.cleanEnvironment();

    }

    /**

     * process success.

     */

    @ShardingTransactionType(TransactionType.BASE)

    @Transactional

    public void processSuccess() {

        springPojoService.processSuccess();

    }

    /**

     * process failure.

     */

    @ShardingTransactionType(TransactionType.BASE)

    @Transactional

    public void processFailure() {

        springPojoService.processFailure();

    }

    public void printData() {

        springPojoService.printData();

    }

}

/*

 * Licensed to the Apache Software Foundation (ASF) under one or more

 * contributor license agreements.  See the NOTICE file distributed with

 * this work for additional information regarding copyright ownership.

 * The ASF licenses this file to You under the Apache License, Version 2.0

 * (the "License"); you may not use this file except in compliance with

 * the License.  You may obtain a copy of the License at

 *

 *     http://www.apache.org/licenses/LICENSE-2.0

 *

 * Unless required by applicable law or agreed to in writing, software

 * distributed under the License is distributed on an "AS IS" BASIS,

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 * See the License for the specific language governing permissions and

 * limitations under the License.

 */

package org.apache.shardingsphere.example.transaction.base.seata.spring.namespace;

import org.springframework.context.ConfigurableApplicationContext;

import org.springframework.context.support.ClassPathXmlApplicationContext;

public class SpringNamespaceExample {

    private static final String CONFIG_FILE = "META-INF/application-sharding-databases-tables.xml";

//    private static final String CONFIG_FILE = "META-INF/application-master-slave.xml";

    public static void main(final String[] args) {

        try (ConfigurableApplicationContext applicationContext = new ClassPathXmlApplicationContext(CONFIG_FILE)) {

            processSeataTransaction(applicationContext);

        }

    }

    private static void processSeataTransaction(final ConfigurableApplicationContext applicationContext) {

        SeataTransactionalService transactionalService = applicationContext.getBean(SeataTransactionalService.class);

        transactionalService.initEnvironment();

        transactionalService.processSuccess();

        try {

            transactionalService.processFailure();

        } catch (final Exception ex) {

            transactionalService.printData();

        } finally {

            transactionalService.cleanEnvironment();

        }

    }

}

<?xml version="1.0" encoding="UTF-8"?>

<!--

  ~ Licensed to the Apache Software Foundation (ASF) under one or more

  ~ contributor license agreements.  See the NOTICE file distributed with

  ~ this work for additional information regarding copyright ownership.

  ~ The ASF licenses this file to You under the Apache License, Version 2.0

  ~ (the "License"); you may not use this file except in compliance with

  ~ the License.  You may obtain a copy of the License at

  ~

  ~     http://www.apache.org/licenses/LICENSE-2.0

  ~

  ~ Unless required by applicable law or agreed to in writing, software

  ~ distributed under the License is distributed on an "AS IS" BASIS,

  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

  ~ See the License for the specific language governing permissions and

  ~ limitations under the License.

  -->

<beans xmlns="http://www.springframework.org/schema/beans"

       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

       xmlns:context="http://www.springframework.org/schema/context"

       xmlns:tx="http://www.springframework.org/schema/tx"

       xmlns:master-slave="http://shardingsphere.apache.org/schema/shardingsphere/masterslave"

       xsi:schemaLocation="http://www.springframework.org/schema/beans 

                        http://www.springframework.org/schema/beans/spring-beans.xsd 

                        http://www.springframework.org/schema/context 

                        http://www.springframework.org/schema/context/spring-context.xsd

                        http://www.springframework.org/schema/tx 

                        http://www.springframework.org/schema/tx/spring-tx.xsd

                        http://shardingsphere.apache.org/schema/shardingsphere/masterslave

                        http://shardingsphere.apache.org/schema/shardingsphere/masterslave/master-slave.xsd">

    <import resource="classpath:META-INF/shardingTransaction.xml"/>

    <context:component-scan base-package="org.apache.shardingsphere.example" />

    <bean id="demo_ds_master" class="com.zaxxer.hikari.HikariDataSource" destroy-method="close">

        <property name="driverClassName" value="com.mysql.jdbc.Driver"/>

        <property name="jdbcUrl" value="jdbc:mysql://localhost:3306/demo_ds_master?useSSL=false"/>

        <property name="username" value="root"/>

        <property name="password" value=""/>

    </bean>

    <bean id="demo_ds_slave_0" class="com.zaxxer.hikari.HikariDataSource" destroy-method="close">

        <property name="driverClassName" value="com.mysql.jdbc.Driver"/>

        <property name="jdbcUrl" value="jdbc:mysql://localhost:3306/demo_ds_slave_0?useSSL=false"/>

        <property name="username" value="root"/>

        <property name="password" value=""/>

    </bean>

    <bean id="demo_ds_slave_1" class="com.zaxxer.hikari.HikariDataSource" destroy-method="close">

        <property name="driverClassName" value="com.mysql.jdbc.Driver"/>

        <property name="jdbcUrl" value="jdbc:mysql://localhost:3306/demo_ds_slave_1?useSSL=false"/>

        <property name="username" value="root"/>

        <property name="password" value=""/>

    </bean>

    <master-slave:load-balance-algorithm id="randomStrategy" type="RANDOM" />

    <master-slave:data-source id="masterSlaveDataSource" master-data-source-name="demo_ds_master" slave-data-source-names="demo_ds_slave_0, demo_ds_slave_1" strategy-ref="randomStrategy" />

    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">

        <property name="dataSource" ref="masterSlaveDataSource" />

    </bean>

    <tx:annotation-driven />

    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">

        <property name="dataSource" ref="masterSlaveDataSource"/>

        <property name="mapperLocations" value="classpath*:META-INF/mappers/*.xml"/>

    </bean>

    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">

        <property name="basePackage" value="org.apache.shardingsphere.example.common.mybatis.repository"/>

        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>

    </bean>

</beans>