content: /*
   * Licensed to the Apache Software Foundation (ASF) under one
   * or more contributor license agreements.  See the NOTICE file
   * distributed with this work for additional information
   * regarding copyright ownership.  The ASF licenses this file
   * to you 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.aliyun.odps;
  
  import com.aliyun.odps.*;
  import com.google.common.cache.Cache;
  import com.google.common.cache.CacheBuilder;
  import com.google.common.cache.CacheLoader;
  import com.google.common.cache.LoadingCache;
  import java.util.concurrent.Callable;
  import java.util.concurrent.TimeUnit;
  import java.util.concurrent.ExecutionException;
  
  public class TunnelEndpointLocalCache {
      private long cacheSize = 10000;
      private int durationSeconds = 900;
      private Cache<String, String> tunnelCache = null;
  
      public TunnelEndpointLocalCache(long size, int duration)
      {
          cacheSize = size;
          durationSeconds = duration;
          tunnelCache = CacheBuilder.newBuilder()
                  .expireAfterAccess(durationSeconds, TimeUnit.SECONDS)
                  .maximumSize(cacheSize).// cache size
                  build();
      }
  
      public String getTunnelEndpointFromLocalCache(Odps odps, String tunnelQuotaName) throws ExecutionException
      {
          String key = odps.getEndpoint() + odps.getDefaultProject();
          return tunnelCache.get(key, new Callable<String>() {
              public String call() throws Exception {
                  String routerEndpoint = odps.projects().get(odps.getDefaultProject()).getTunnelEndpoint(tunnelQuotaName);
                  return routerEndpoint;
              }
          });
      }
  
      public void putTunnelEndpointIntoLocalCache(Odps odps, String tunnelEndpoint)
      {
          String key = odps.getEndpoint() + odps.getDefaultProject();
          tunnelCache.put(key,tunnelEndpoint);
      }
  
      public Cache<String, String> getTunnelCache()
      {
          return tunnelCache;
      }
  }