com.datatorrent.lib.bucket.ExpirableHdfsBucketStore.java Source code

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Here is the source code for com.datatorrent.lib.bucket.ExpirableHdfsBucketStore.java

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/*
 * Copyright (c) 2014 DataTorrent, Inc. ALL Rights Reserved.
 *
 * 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.datatorrent.lib.bucket;

import java.io.IOException;
import java.util.Collection;
import java.util.Iterator;
import java.util.Map;

import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * <p>ExpirableHdfsBucketStore class.</p>
 *
 * @since 0.9.5
 */
public class ExpirableHdfsBucketStore<T extends Bucketable & Event> extends HdfsBucketStore<T>
        implements BucketStore.ExpirableBucketStore<T> {

    @Override
    public void deleteExpiredBuckets(long time) throws IOException {
        Iterator<Long> iterator = windowToBuckets.keySet().iterator();
        for (; iterator.hasNext();) {
            long window = iterator.next();
            long timestamp = windowToTimestamp.get(window);
            if (timestamp < time) {
                Collection<Integer> indices = windowToBuckets.get(window);
                synchronized (indices) {
                    if (indices.size() > 0) {
                        Path dataFilePath = new Path(bucketRoot + PATH_SEPARATOR + window);
                        FileSystem fs = FileSystem.newInstance(dataFilePath.toUri(), configuration);
                        try {
                            if (fs.exists(dataFilePath)) {
                                logger.debug("start delete {}", window);
                                fs.delete(dataFilePath, true);
                                logger.debug("end delete {}", window);
                            }
                            for (int bucketIdx : indices) {
                                Map<Long, Long> offsetMap = bucketPositions[bucketIdx];
                                if (offsetMap != null) {
                                    synchronized (offsetMap) {
                                        offsetMap.remove(window);
                                    }
                                }
                            }
                        } finally {
                            fs.close();
                        }
                    }
                    windowToTimestamp.remove(window);
                    iterator.remove();
                }
            }
        }
    }

    private static transient final Logger logger = LoggerFactory.getLogger(ExpirableHdfsBucketStore.class);
}