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Source code
001/*
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements.  See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership.  The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License.  You may obtain a copy of the License at
009 *
010 *   http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing,
013 * software distributed under the License is distributed on an
014 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
015 * KIND, either express or implied.  See the License for the
016 * specific language governing permissions and limitations
017 * under the License.
018 */
019package org.apache.reef.io.network.naming;
020
021import org.apache.reef.util.cache.Cache;
022import org.apache.reef.util.cache.CacheImpl;
023import org.apache.reef.util.cache.SystemTime;
024import org.apache.reef.wake.Identifier;
025
026import java.net.InetSocketAddress;
027import java.util.concurrent.Callable;
028import java.util.concurrent.ExecutionException;
029
030/**
031 * Naming cache implementation.
032 */
033public class NameCache implements Cache<Identifier, InetSocketAddress> {
034
035  private final Cache<Identifier, InetSocketAddress> cache;
036
037  /**
038   * Constructs a naming cache.
039   *
040   * @param timeout a cache entry timeout after write
041   */
042  public NameCache(final long timeout) {
043    cache = new CacheImpl<>(new SystemTime(), timeout);
044  }
045
046  /**
047   * Gets an address for an identifier.
048   *
049   * @param key          an identifier
050   * @param valueFetcher a callable to load a value for the corresponding identifier
051   * @return an Internet socket address
052   * @throws ExecutionException
053   */
054  @Override
055  public InetSocketAddress get(final Identifier key,
056                               final Callable<InetSocketAddress> valueFetcher) throws ExecutionException {
057    return cache.get(key, valueFetcher);
058  }
059
060  /**
061   * Invalidates the entry for an identifier.
062   *
063   * @param key an identifier
064   */
065  @Override
066  public void invalidate(final Identifier key) {
067    cache.invalidate(key);
068  }
069
070}