org.statefulj.demo.ddd.customer.domain.impl.CustomerServiceImpl.java Source code

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Here is the source code for org.statefulj.demo.ddd.customer.domain.impl.CustomerServiceImpl.java

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/***
 * 
 * Copyright 2014 Andrew Hall
 *
 * Licensed 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.statefulj.demo.ddd.customer.domain.impl;

import java.math.BigInteger;

import javax.annotation.PostConstruct;
import javax.annotation.Resource;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
import javax.transaction.Transactional;

import org.springframework.orm.jpa.JpaTransactionManager;
import org.springframework.stereotype.Service;
import org.springframework.transaction.TransactionStatus;
import org.springframework.transaction.support.TransactionCallback;
import org.springframework.transaction.support.TransactionTemplate;
import org.statefulj.demo.ddd.customer.domain.Customer;
import org.statefulj.demo.ddd.customer.domain.CustomerService;

@Service(value = CustomerService.ID)
@Transactional
class CustomerServiceImpl implements CustomerService {

    @Resource
    CustomerRepository customerRepo;

    @PersistenceContext
    EntityManager entityManager;

    @Resource
    JpaTransactionManager transactionManager;

    @Override
    public void save(Customer user) {
        customerRepo.save(user);
        entityManager.flush();
    }

    @Transactional
    @Override
    public Long nextId() {
        return ((BigInteger) entityManager.createNativeQuery("CALL NEXT VALUE FOR customer_sequence")
                .getSingleResult()).longValue();
    }

    @PostConstruct
    private void init() {
        TransactionTemplate tt = new TransactionTemplate(transactionManager);
        tt.execute(new TransactionCallback<Object>() {

            @Override
            public Object doInTransaction(TransactionStatus status) {
                return entityManager.createNativeQuery("CREATE SEQUENCE customer_sequence AS BIGINT START WITH 1")
                        .executeUpdate();
            }

        });
    }
}