/*
* Copyright 2010-2013 the original author or authors.
*
* 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 sample.data.gemfire.service;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import javax.annotation.PostConstruct;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.util.Assert;
import sample.data.gemfire.domain.Gemstone;
/**
* The GemstoneServiceImpl class is a Service object implementing the GemstoneService
* interface containing business logic and rules in addition to data services for
* processing Gemstones.
*
* @author John Blum
*/
@Service("gemstoneService")
public class GemstoneServiceImpl implements GemstoneService {
protected static final List<String> APPROVED_GEMS = new ArrayList<String>(
Arrays.asList("ALEXANDRITE", "AQUAMARINE", "DIAMOND", "OPAL", "PEARL",
"RUBY", "SAPPHIRE", "SPINEL", "TOPAZ"));
@Autowired
private GemstoneRepository gemstoneRepo;
@PostConstruct
public void init() {
Assert.notNull(this.gemstoneRepo,
"A reference to the 'GemstoneRepository' was not properly configured!");
System.out.printf("%1$s initialized!%n", getClass().getSimpleName());
}
/**
* Returns a count of the number of Gemstones in the GemFire Cache.
* <p/>
*
* @return a long value indicating the number of Gemstones in the GemFire Cache.
*/
@Override
@Transactional(readOnly = true)
public long count() {
return this.gemstoneRepo.count();
}
/**
* Gets a Gemstone by ID.
* <p/>
*
* @param id a long value indicating the identifier of the Gemstone.
* @return a Gemstone with ID, or null if no Gemstone exists with ID.
* @see sample.data.gemfire.domain.Gemstone
*/
@Override
@Transactional(readOnly = true)
public Gemstone get(final Long id) {
return this.gemstoneRepo.findOne(id);
}
/**
* Gets a Gemstone by name.
* <p/>
*
* @param name a String value indicating the name of the Gemstone.
* @return a Gemstone with name, or null if no Gemstone exists with name.
* @see sample.data.gemfire.domain.Gemstone
*/
@Override
@Transactional(readOnly = true)
public Gemstone get(final String name) {
return this.gemstoneRepo.findByName(name);
}
/**
* Return a listing of Gemstones currently stored in the GemFire Cache.
* <p/>
*
* @return a Iterable object to iterate over the list of Gemstones currently stored in
* the GemFire Cache.
* @see java.lang.Iterable
* @see sample.data.gemfire.domain.Gemstone
*/
@Override
@Transactional(readOnly = true)
public Iterable<Gemstone> list() {
return this.gemstoneRepo.findAll();
}
/**
* Saves the specified Gemstone to the GemFire Cache.
* <p/>
*
* @param gemstone the Gemstone to save in the GemFire Cache.
* @return the saved Gemstone.
* @see sample.data.gemfire.domain.Gemstone
*/
@Override
@Transactional
public Gemstone save(final Gemstone gemstone) {
Assert.notNull(gemstone, "The Gemstone to save must not be null!");
Assert.notNull(gemstone.getName(), "The name of the Gemstone must be specified!");
// NOTE deliberately (naively) validate the Gemstone after mutating data access in
// GemFire rather than before
// to demonstrate transactions in GemFire.
Gemstone savedGemstone = validate(this.gemstoneRepo.save(gemstone));
Assert.state(savedGemstone.equals(get(gemstone.getId())), String.format(
"Failed to find Gemstone (%1$s) in GemFire's Cache Region 'Gemstones'!",
gemstone));
System.out.printf("Saved Gemstone (%1$s)%n", savedGemstone.getName());
return gemstone;
}
private Gemstone validate(final Gemstone gemstone) {
if (!APPROVED_GEMS.contains(gemstone.getName().toUpperCase())) {
// NOTE if the Gemstone is not valid, blow chunks (should cause transaction to
// rollback in GemFire)!
System.err.printf("Illegal Gemstone (%1$s)!%n", gemstone.getName());
throw new IllegalGemstoneException(String.format(
"'%1$s' is not a valid Gemstone!", gemstone.getName()));
}
return gemstone;
}
public static final class IllegalGemstoneException extends IllegalArgumentException {
public IllegalGemstoneException() {
}
public IllegalGemstoneException(final String message) {
super(message);
}
public IllegalGemstoneException(final Throwable cause) {
super(cause);
}
public IllegalGemstoneException(final String message, final Throwable cause) {
super(message, cause);
}
}
}