com.netflix.astyanax.shallows.EmptyCheckpointManager.java Source code

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Here is the source code for com.netflix.astyanax.shallows.EmptyCheckpointManager.java

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/*******************************************************************************
 * Copyright 2011 Netflix
 * 
 * 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.netflix.astyanax.shallows;

import java.util.SortedMap;
import java.util.concurrent.ConcurrentMap;

import com.google.common.collect.Maps;
import com.netflix.astyanax.connectionpool.exceptions.ConnectionException;
import com.netflix.astyanax.query.CheckpointManager;

public class EmptyCheckpointManager implements CheckpointManager {
    private ConcurrentMap<String, String> tokenMap = Maps.newConcurrentMap();

    /**
     * Do nothing since checkpoints aren't being persisted.
     */
    @Override
    public void trackCheckpoint(String startToken, String checkpointToken) {
        tokenMap.put(startToken, checkpointToken);
    }

    /**
     * Since no checkpoint management is done here simply use the startToken as the 
     * start checkpoint for the range
     */
    @Override
    public String getCheckpoint(String startToken) {
        return tokenMap.get(startToken);
    }

    @Override
    public SortedMap<String, String> getCheckpoints() throws ConnectionException {
        return Maps.newTreeMap();
    }

}