add XATransactionalService for spring namespace XA.

sharding-jdbc-example/transaction-example/transaction-2pc-xa-example/transaction-xa-spring-namespace-example/src/main/java/io/shardingsphere/example/transaction/xa/spring/namespace/XATransactionalService.java

+/*
+ * 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 io.shardingsphere.example.transaction.xa.spring.namespace;
+
+import io.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 XATransactionalService {
+    
+    private final SpringPojoService springPojoService;
+    
+    @Autowired
+    public XATransactionalService(final SpringPojoService jpaCommonService) {
+        this.springPojoService = jpaCommonService;
+    }
+    
+    public void initEnvironment() {
+        springPojoService.initEnvironment();
+    }
+    
+    public void cleanEnvironment() {
+        springPojoService.cleanEnvironment();
+    }
+    
+    /**
+     * process success, XA transaction will be committed.
+     */
+    @ShardingTransactionType(TransactionType.XA)
+    @Transactional
+    public void processSuccess() {
+        springPojoService.processSuccess();
+    }
+    
+    /**
+     * process failure, XA transaction will be rollback.
+     */
+    @ShardingTransactionType(TransactionType.XA)
+    @Transactional
+    public void processFailure() {
+        springPojoService.processFailure();
+    }
+    
+    public void printData() {
+        springPojoService.printData();
+    }
+}