/*
* Copyright 2007 Google Inc.
*
* 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 com.google.gwt.sample.dynatablerf.server;
import static com.google.gwt.sample.dynatablerf.shared.DynaTableRequestFactory.SchoolCalendarRequest.ALL_DAYS;
import com.google.gwt.sample.dynatablerf.domain.Person;
import java.io.IOException;
import java.util.List;
import java.util.Random;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
/**
* The server-side service class.
*/
public class SchoolCalendarService implements Filter {
private static final ThreadLocal<PersonSource> PERSON_SOURCE = new ThreadLocal<PersonSource>();
static final ThreadLocal<ScheduleSource> SCHEDULE_SOURCE = new ThreadLocal<ScheduleSource>();
public static Person createPerson() {
checkPersonSource();
Person person = PersonFuzzer.generatePerson();
PERSON_SOURCE.get().persist(person);
return person;
}
public static Person findPerson(String id) {
checkPersonSource();
return PERSON_SOURCE.get().findPerson(id);
}
public static List<Person> getPeople(int startIndex, int maxCount,
List<Boolean> filter) {
checkPersonSource();
return PERSON_SOURCE.get().getPeople(startIndex, maxCount, filter);
}
public static Person getRandomPerson() {
PersonSource source = PERSON_SOURCE.get();
return source.getPeople(new Random().nextInt(source.countPeople()), 1,
ALL_DAYS).get(0);
}
public static void persist(Person person) {
checkPersonSource();
PERSON_SOURCE.get().persist(person);
}
private static void checkPersonSource() {
if (PERSON_SOURCE.get() == null) {
throw new IllegalStateException(
"Calling service method outside of HTTP request");
}
}
private PersonSource backingStore;
private ScheduleSource scheduleStore;
public void destroy() {
}
public void doFilter(ServletRequest req, ServletResponse resp,
FilterChain chain) throws IOException, ServletException {
try {
ScheduleSource scheduleBacking = ScheduleSource.of(scheduleStore);
SCHEDULE_SOURCE.set(scheduleBacking);
PERSON_SOURCE.set(PersonSource.of(backingStore, scheduleBacking));
chain.doFilter(req, resp);
} finally {
PERSON_SOURCE.set(null);
SCHEDULE_SOURCE.set(null);
}
}
public void init(FilterConfig config) {
backingStore = (PersonSource) config.getServletContext().getAttribute(
SchoolCalendarService.class.getName());
if (backingStore == null) {
List<Person> randomPeople = PersonFuzzer.generateRandomPeople();
scheduleStore = ScheduleSource.of(PersonFuzzer.collectSchedules(randomPeople));
backingStore = PersonSource.of(randomPeople, scheduleStore);
config.getServletContext().setAttribute(
SchoolCalendarService.class.getName(), backingStore);
}
}
}