org.ops4j.pax.exam.sample6.service.LibraryClient Maven / Gradle / Ivy
/*
* Copyright 2010 Harald Wellmann
*
* 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.ops4j.pax.exam.sample6.service;
import java.io.Serializable;
import javax.ejb.Stateless;
import javax.ejb.TransactionAttribute;
import javax.ejb.TransactionAttributeType;
import javax.inject.Inject;
import org.ops4j.pax.exam.sample6.model.Author;
/**
* NOTE: By the EJB 3.1 specification, all public business methods are transactional by default,
* with a REQUIRED transaction type, so the @TransactionAttribute annotations on the
* methods of this class are redundant.
*
* However, by adding these annotations, we can use this class both in a Java EE 6 and in a Spring
* 3.0.x container. Of course, the preferred solution would be if Spring supported the
* @Stateless and other EJB annotations out-of-the-box.
*
* @author hwellmann
*
*/
@Stateless
public class LibraryClient implements Serializable {
private static final long serialVersionUID = 1L;
@Inject
private LibraryServiceNoTx libraryService;
@TransactionAttribute(TransactionAttributeType.SUPPORTS)
public void fillLibrary() {
if (libraryService.getNumBooks() != 0) {
return;
}
Author mann = libraryService.createAuthor("Thomas", "Mann");
Author steinbeck = libraryService.createAuthor("John", "Steinbeck");
libraryService.createBook("Buddenbrooks", mann);
libraryService.createBook("East of Eden", steinbeck);
}
public long getNumBooks() {
return libraryService.getNumBooks();
}
}