org.fabric3.samples.bigbank.loan.store.persistent.JPAStoreService.java Source code

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Here is the source code for org.fabric3.samples.bigbank.loan.store.persistent.JPAStoreService.java

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/*
 * 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.fabric3.samples.bigbank.loan.store.persistent;

import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
import javax.persistence.PersistenceException;
import javax.persistence.Query;

import org.springframework.transaction.annotation.Transactional;

import org.fabric3.samples.bigbank.loan.domain.LoanRecord;
import org.fabric3.samples.bigbank.loan.store.ApplicationNotFoundException;
import org.fabric3.samples.bigbank.loan.store.StoreException;
import org.fabric3.samples.bigbank.loan.store.StoreService;

/**
 * Demonstrates using JPA persistence. By default, the persistence context is transaction-scoped. As this component implementation requires managed
 * transactions, operations will be invoked in the context of a transaction resulting in persistence context changes being written to the database
 * when the transaction completes.
 *
 * @version $Revision$ $Date$
 */
@Transactional
public class JPAStoreService implements StoreService {
    private EntityManager em;

    @PersistenceContext(name = "loanApplication")
    public void setEm(EntityManager em) {
        this.em = em;
    }

    public void save(LoanRecord record) throws StoreException {
        try {
            em.persist(record);
        } catch (PersistenceException e) {
            throw new StoreException(e);
        }
    }

    public LoanRecord update(LoanRecord record) throws StoreException {
        try {
            return em.merge(record);
        } catch (PersistenceException e) {
            throw new StoreException(e);
        }
    }

    public void remove(long id) throws StoreException {
        LoanRecord application = em.find(LoanRecord.class, id);
        if (application == null) {
            throw new ApplicationNotFoundException("Loan application not found: " + id);
        }
        try {
            em.remove(application);
        } catch (PersistenceException e) {
            throw new StoreException(e);
        }
    }

    public LoanRecord find(long id) throws StoreException {
        try {
            Query query = em.createQuery("SELECT r FROM LoanRecord r WHERE r.id = :number");
            query.setParameter("number", id);
            return (LoanRecord) query.getSingleResult();
        } catch (PersistenceException e) {
            throw new StoreException(e);
        }
    }

    public LoanRecord findBySSN(String ssn) throws StoreException {
        try {
            Query query = em.createQuery("SELECT r FROM LoanRecord r WHERE r.ssn = :ssn");
            query.setParameter("ssn", ssn);
            return (LoanRecord) query.getSingleResult();
        } catch (PersistenceException e) {
            throw new StoreException(e);
        }
    }
}