| /* |
| * 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 WARRANTIESOR 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.aries.jpa.example.tasklist.ds.impl; |
| |
| import java.util.Collection; |
| |
| import javax.persistence.EntityManager; |
| |
| import org.apache.aries.jpa.example.tasklist.model.Task; |
| import org.apache.aries.jpa.example.tasklist.model.TaskService; |
| import org.apache.aries.jpa.template.EmConsumer; |
| import org.apache.aries.jpa.template.EmFunction; |
| import org.apache.aries.jpa.template.JpaTemplate; |
| import org.apache.aries.jpa.template.TransactionType; |
| import org.osgi.service.component.annotations.Component; |
| import org.osgi.service.component.annotations.Reference; |
| |
| @Component |
| public class TaskServiceImpl implements TaskService { |
| |
| private JpaTemplate jpa; |
| |
| public Task getTask(final Integer id) { |
| return jpa.txExpr(TransactionType.Required, new EmFunction<Task>() { |
| public Task apply(EntityManager em) { |
| return em.find(Task.class, id); |
| } |
| }); |
| } |
| |
| public void addTask(final Task task) { |
| jpa.tx(new EmConsumer() { |
| public void accept(EntityManager em) { |
| em.persist(task); |
| em.flush(); |
| } |
| }); |
| } |
| |
| public Collection<Task> getTasks() { |
| return jpa.txExpr(new EmFunction<Collection<Task>>() { |
| public Collection<Task> apply(EntityManager em) { |
| return em.createQuery("select t from Task t", Task.class).getResultList(); |
| } |
| }); |
| } |
| |
| public void updateTask(final Task task) { |
| jpa.tx(new EmConsumer() { |
| public void accept(EntityManager em) { |
| em.persist(task); |
| } |
| }); |
| } |
| |
| public void deleteTask(final Integer id) { |
| jpa.tx(new EmConsumer() { |
| public void accept(EntityManager em) { |
| em.remove(getTask(id)); |
| } |
| }); |
| } |
| |
| @Reference(target = "(osgi.unit.name=tasklist)") |
| public void setJpaTemplate(JpaTemplate jpa) { |
| this.jpa = jpa; |
| } |
| |
| // See below for the Java 8 version with closures |
| /* |
| public Task getTask(Integer id) { |
| return jpa.txExpr(TransactionType.Required, em -> em.find(Task.class, id)); |
| } |
| |
| public void addTask(Task task) { |
| jpa.tx(em -> { |
| em.persist(task); |
| em.flush(); |
| }); |
| } |
| |
| public Collection<Task> getTasks() { |
| return jpa.txExpr(em -> em.createQuery("select t from Task t", Task.class).getResultList()); |
| } |
| |
| public void updateTask(Task task) { |
| jpa.tx(em -> em.persist(task)); |
| } |
| |
| public void deleteTask(Integer id) { |
| jpa.tx(em -> em.remove(getTask(id))); |
| } |
| |
| @Reference(target = "(osgi.unit.name=tasklist)") |
| public void setJpaTemplate(JpaTemplate jpa) { |
| this.jpa = jpa; |
| } |
| */ |
| } |