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package eu.dnetlib.data.mapreduce.hbase.actions2;
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import java.io.IOException;
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import java.nio.ByteBuffer;
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import java.util.Set;
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import org.apache.hadoop.hbase.client.Delete;
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import org.apache.hadoop.hbase.client.Result;
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import org.apache.hadoop.hbase.io.ImmutableBytesWritable;
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import org.apache.hadoop.hbase.mapreduce.TableMapper;
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import org.apache.hadoop.hbase.util.Bytes;
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import com.google.common.base.Splitter;
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import com.google.common.collect.Iterables;
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import com.google.common.collect.Sets;
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import eu.dnetlib.miscutils.datetime.DateUtils;
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public class GarbageActionsMapper extends TableMapper<ImmutableBytesWritable, Delete> {
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private static final String LATEST_RAW_SETS = "latestRawSets";
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private static final String GARBAGE_TIME_MARING = "garbageTimeMargin";
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private final Set<ByteBuffer> latestRawSets = Sets.newHashSet();
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private long dateLimit;
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private final long MAX_DATE_INTERVAL = 4 * 24 * 60 * 60 * 1000; // 4 days default value
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@Override
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protected void setup(final Context context) throws IOException, InterruptedException {
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long garbageTimeMargin = MAX_DATE_INTERVAL;
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try {
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garbageTimeMargin = Long.parseLong(context.getConfiguration().get(GARBAGE_TIME_MARING));
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} catch (NumberFormatException e) {}
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this.dateLimit = DateUtils.now() - garbageTimeMargin;
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System.out.println("dateLimit: " + dateLimit);
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final String s = context.getConfiguration().get(LATEST_RAW_SETS);
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if (s != null) {
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for (String set : Sets.newHashSet(Splitter.on(",").omitEmptyStrings().trimResults().split(s))) {
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latestRawSets.add(ByteBuffer.wrap(Bytes.toBytes(set)));
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}
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}
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if (latestRawSets.isEmpty()) { throw new IOException("Input parameter (" + LATEST_RAW_SETS + ") is missing or empty: " + s); }
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}
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@Override
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protected void map(final ImmutableBytesWritable key, final Result value, final Context context) throws IOException, InterruptedException {
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if (isInARecentRawSet(value)) { return; }
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context.getCounter("Actions", "N. Deletes").increment(1);
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context.write(key, new Delete(key.copyBytes()));
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}
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private boolean isInARecentRawSet(final Result value) {
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for (byte[] s1 : value.getFamilyMap(Bytes.toBytes("set")).keySet()) {
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if (isRecentRawSet(s1)) { return true; }
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}
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return false;
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}
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private boolean isRecentRawSet(final byte[] rawSet) {
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final String date = Iterables.getLast(Splitter.on("_").split(Bytes.toString(rawSet)));
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if (Long.parseLong(date) > this.dateLimit || latestRawSets.contains(ByteBuffer.wrap(rawSet))) { return true; }
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return false;
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}
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}
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