org.statefulj.demo.ddd.account.domain.impl.AccountServiceImpl.java Source code

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Here is the source code for org.statefulj.demo.ddd.account.domain.impl.AccountServiceImpl.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.account.domain.impl;

import java.math.BigInteger;
import java.util.List;

import javax.annotation.PostConstruct;
import javax.annotation.Resource;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
import javax.servlet.http.HttpServletRequest;
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.account.domain.Account;
import org.statefulj.demo.ddd.account.domain.AccountId;
import org.statefulj.demo.ddd.account.domain.AccountService;
import org.statefulj.demo.ddd.account.domain.CheckingAccount;
import org.statefulj.demo.ddd.account.domain.LoanAccount;
import org.statefulj.demo.ddd.account.domain.SavingsAccount;
import org.statefulj.demo.ddd.customer.domain.CustomerId;
import org.statefulj.demo.ddd.customer.domain.CustomerSessionService;
import org.statefulj.framework.core.model.Factory;
import org.statefulj.framework.core.model.Finder;

@Transactional
@Service(AccountService.ID)
public class AccountServiceImpl
        implements AccountService, Finder<Account, Object>, Factory<Account, HttpServletRequest> {

    @Resource
    AccountRepository accountRepository;

    @Resource
    CustomerSessionService userSessionService;

    @PersistenceContext
    EntityManager entityManager;

    @Resource
    JpaTransactionManager transactionManager;

    @Override
    public List<Account> findAccounts(CustomerId customerId) {
        return accountRepository.findByCustomerId(customerId);
    }

    @Override
    public Account create(Class<Account> clazz, String event, HttpServletRequest request) {
        Account account = null;

        switch (request.getParameter("type")) {

        case "checking":
            account = new CheckingAccount();
            break;

        case "savings":
            account = new SavingsAccount();
            break;

        case "loan":
            account = new LoanAccount();
            break;

        default:
            throw new RuntimeException("Unrecognized account type " + request.getParameter("type"));
        }

        return account;
    }

    @Override
    public void save(Account account) {
        this.accountRepository.save(account);
    }

    @Transactional
    @Override
    public Long nextId() {
        return ((BigInteger) entityManager.createNativeQuery("CALL NEXT VALUE FOR account_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 account_sequence AS BIGINT START WITH 1")
                        .executeUpdate();
            }

        });
    }

    @Override
    public Account find(Class<Account> clazz, String event, Object context) {
        return null;
    }

    @Override
    public Account find(Class<Account> clazz, Object id, String event, Object context) {
        AccountId accountId = null;
        if (id instanceof AccountId) {
            accountId = (AccountId) id;
        } else {
            accountId = new AccountId((Long) id);
        }
        return this.accountRepository.findOne(accountId);
    }
}