content: /*
   * Copyright 2010 Proofpoint, 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 io.airlift.sample;
  
  import com.google.common.cache.Cache;
  import com.google.common.cache.CacheBuilder;
  import com.google.common.collect.ImmutableList;
  import com.google.inject.Inject;
  
  import java.util.Collection;
  import java.util.concurrent.ConcurrentMap;
  import java.util.concurrent.TimeUnit;
  
  import static java.util.Objects.requireNonNull;
  
  public class PersonStore
  {
      private final ConcurrentMap<String, Person> persons;
  
      @Inject
      public PersonStore(StoreConfig config)
      {
          requireNonNull(config, "config must not be null");
  
          Cache<String, Person> personCache = CacheBuilder.newBuilder()
                  .expireAfterWrite(config.getTtl().toMillis(), TimeUnit.MILLISECONDS)
                  .build();
          persons = personCache.asMap();
      }
  
      public Person get(String id)
      {
          requireNonNull(id, "id must not be null");
  
          return persons.get(id);
      }
  
      /**
       * @return true if the entry was created for the first time
       */
      public boolean put(String id, Person person)
      {
          requireNonNull(id, "id must not be null");
          requireNonNull(person, "person must not be null");
  
          return persons.put(id, person) == null;
      }
  
      /**
       * @return true if the entry was removed
       */
      public boolean delete(String id)
      {
          requireNonNull(id, "id must not be null");
          return persons.remove(id) != null;
      }
  
      public Collection<Person> getAll()
      {
          return ImmutableList.copyOf(persons.values());
      }
  }
  