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Local cache implementation for Druid using Caffeine https://github.com/ben-manes/caffeine as the underlying implementation

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/*
 * Licensed to Metamarkets Group Inc. (Metamarkets) under one
 * or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership. Metamarkets 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 io.druid.client.cache;

import com.fasterxml.jackson.databind.Module;
import com.fasterxml.jackson.databind.module.SimpleModule;
import com.google.common.collect.ImmutableList;
import com.google.inject.Binder;
import io.druid.initialization.DruidModule;

import java.util.List;

public class CaffeineDruidModule implements DruidModule
{

  @Override
  public void configure(Binder binder)
  {

  }

  @Override
  public List getJacksonModules()
  {
    return ImmutableList.of(
        new SimpleModule("DruidCaffeineCache")
            .registerSubtypes(CaffeineCacheProvider.class)
    );
  }
}