import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.File;

public abstract class AbstractCacheCleanup implements CleanupAction {

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

    private final FilesFinder eligibleFilesFinder;

    public AbstractCacheCleanup(FilesFinder eligibleFilesFinder) {
        this.eligibleFilesFinder = eligibleFilesFinder;
    }

                assert filter instanceof NonReservedFileFilter
                files.findAll { filter.accept(it) }
            }
        }
    }

    AbstractCacheCleanup cleanupAction(FilesFinder finder, Spec<File> spec) {
        new AbstractCacheCleanup(finder) {
            @Override
            protected boolean shouldDelete(File file) {
                return spec.isSatisfiedBy(file)
            }

import java.util.Date;
import java.util.function.Supplier;

/**
 * Deletes any cache entries not accessed within the specified number of days.
 */
public class LeastRecentlyUsedCacheCleanup extends AbstractCacheCleanup {
    private static final Logger LOGGER = LoggerFactory.getLogger(LeastRecentlyUsedCacheCleanup.class);

    private final FileAccessTimeJournal journal;
    private final Supplier<Long> removeUnusedEntriesOlderThan;

import static org.apache.commons.io.filefilter.FileFilterUtils.asFileFilter;
import static org.apache.commons.io.filefilter.FileFilterUtils.directoryFileFilter;

public class UnusedVersionsCacheCleanup extends AbstractCacheCleanup {

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

    private final Pattern cacheNamePattern;
    private final CacheVersionMapping cacheVersionMapping;