com.github.cbismuth.fdupes.stream.DuplicatesFinder.java Source code

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Here is the source code for com.github.cbismuth.fdupes.stream.DuplicatesFinder.java

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/*
 * The MIT License (MIT)
 * Copyright (c) 2016 Christophe Bismuth
 *
 * Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sublicense, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 *
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

package com.github.cbismuth.fdupes.stream;

import com.codahale.metrics.Gauge;
import com.github.cbismuth.fdupes.cli.SystemPropertyGetter;
import com.github.cbismuth.fdupes.collect.PathComparator;
import com.github.cbismuth.fdupes.container.immutable.PathElement;
import com.github.cbismuth.fdupes.io.BufferedAnalyzer;
import com.github.cbismuth.fdupes.io.Md5Computer;
import com.google.common.base.Preconditions;
import com.google.common.collect.Multimap;
import org.slf4j.Logger;
import org.springframework.stereotype.Component;

import java.util.Collection;
import java.util.Set;

import static com.codahale.metrics.MetricRegistry.name;
import static com.github.cbismuth.fdupes.metrics.MetricRegistrySingleton.getMetricRegistry;
import static org.slf4j.LoggerFactory.getLogger;

@Component
public class DuplicatesFinder {

    private static final Logger LOGGER = getLogger(DuplicatesFinder.class);

    private final Md5Computer md5Computer;
    private final DuplicateFinderByKey duplicateFinderByKey;
    private final PathComparator pathComparator;
    private final SystemPropertyGetter systemPropertyGetter;

    public DuplicatesFinder(final Md5Computer md5Computer, final DuplicateFinderByKey duplicateFinderByKey,
            final PathComparator pathComparator, final SystemPropertyGetter systemPropertyGetter) {
        this.duplicateFinderByKey = duplicateFinderByKey;
        this.md5Computer = md5Computer;
        this.pathComparator = pathComparator;
        this.systemPropertyGetter = systemPropertyGetter;
    }

    public void extractDuplicates(final Collection<PathElement> input, final Set<PathElement> uniqueElements,
            final Multimap<PathElement, PathElement> duplicates) {
        Preconditions.checkNotNull(input, "null file metadata collection");

        LOGGER.info("Pass 1/3 - compare file by size ...");
        final Collection<PathElement> duplicatesBySize = duplicateFinderByKey.getDuplicates(input,
                PathElement::size, uniqueElements);
        getMetricRegistry().register(name("duplicates", "by-size", "count"),
                (Gauge<Integer>) duplicatesBySize::size);
        LOGGER.info("Pass 1/3 - compare file by size completed! - {} duplicate(s) found", duplicatesBySize.size());

        LOGGER.info("Pass 2/3 - compare file by MD5 ...");
        final Collection<PathElement> duplicatesByMd5 = duplicateFinderByKey.getDuplicates(duplicatesBySize,
                md5Computer::compute, uniqueElements);
        getMetricRegistry().register(name("duplicates", "by-md5", "count"), (Gauge<Integer>) duplicatesByMd5::size);
        LOGGER.info("Pass 2/3 - compare file by MD5 completed! - {} duplicate(s) found", duplicatesByMd5.size());

        LOGGER.info("Pass 3/3 - compare file byte-by-byte ...");
        final BufferedAnalyzer analyzer = new BufferedAnalyzer(pathComparator, systemPropertyGetter);
        analyzer.analyze(duplicatesByMd5, uniqueElements, duplicates);
        getMetricRegistry().register(name("duplicates", "by-bytes", "count"), (Gauge<Integer>) duplicates::size);
        LOGGER.info("Pass 3/3 - compare file byte-by-byte completed! - {} duplicate(s) found", duplicates.size());
    }

}