com.microsoft.reef.io.storage.ram.RamMap Maven / Gradle / Ivy

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/**
 * Copyright (C) 2013 Microsoft Corporation
 *
 * 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.microsoft.reef.io.storage.ram;

import com.microsoft.reef.io.ExternalMap;
import com.microsoft.reef.io.storage.util.GetAllIterable;

import javax.inject.Inject;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;
import java.util.concurrent.ConcurrentSkipListMap;

/**
 * Simple in-memory ExternalMap implementation.  This class does not require
 * any codecs, and so is guaranteed to be instantiable.  Therefore, it is the
 * default ExternalMap provided by StorageManagerRam.
 * 
 * @author Rusty Sears 
 */
public class RamMap implements ExternalMap {
    private final ConcurrentSkipListMap map
            = new ConcurrentSkipListMap();
    
    @Inject
    public RamMap(RamStorageService ramStore) {
        //this.localStore = localStore;
    }
    
    @Override
    public boolean containsKey(CharSequence key) {
        return map.containsKey(key);
    }

    @Override
    public T get(CharSequence key) {
        return map.get(key);
    }

    @Override
    public T put(CharSequence key, T value) {
        return map.put(key, value);
    }

    @Override
    public T remove(CharSequence key) {
        return map.remove(key);
    }

    @Override
    public void putAll(Map m) {
        map.putAll(m);
    }

    @Override
    public Iterable> getAll(Set keys) {
      return new GetAllIterable<>(keys, this);
    }
    
}