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561 lines
28 KiB
561 lines
28 KiB
// plasmaCRProcess.java
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// -----------------------
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// part of YaCy
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// (C) by Michael Peter Christen; mc@yacy.net
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// first published on http://www.anomic.de
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// Frankfurt, Germany, 2005
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// Created 15.11.2005
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//
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// $LastChangedDate$
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// $LastChangedRevision$
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// $LastChangedBy$
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//
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// This program is free software; you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation; either version 2 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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package de.anomic.search.blockrank;
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import java.io.File;
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import java.io.IOException;
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import java.util.Iterator;
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import de.anomic.kelondro.index.Row;
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import de.anomic.kelondro.index.RowSet;
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import de.anomic.kelondro.index.ObjectIndex;
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import de.anomic.kelondro.order.Base64Order;
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import de.anomic.kelondro.order.Bitfield;
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import de.anomic.kelondro.order.CloneableIterator;
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import de.anomic.kelondro.order.MicroDate;
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import de.anomic.kelondro.table.Table;
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import de.anomic.kelondro.text.IndexCell;
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import de.anomic.kelondro.text.ReferenceContainer;
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import de.anomic.kelondro.text.Segment;
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import de.anomic.kelondro.text.referencePrototype.WordReference;
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import de.anomic.kelondro.util.DateFormatter;
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import de.anomic.kelondro.util.MemoryControl;
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import de.anomic.kelondro.util.AttrSeq;
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import de.anomic.kelondro.util.FileUtils;
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public class CRProcess {
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/*
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header.append("# Name=YaCy " + ((type.equals("crl")) ? "Local" : "Global") + " Citation Reference Ticket"); header.append((char) 13); header.append((char) 10);
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header.append("# Created=" + System.currentTimeMillis()); header.append((char) 13); header.append((char) 10);
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header.append("# Structure=<Referee-12>,'=',<UDate-3>,<VDate-3>,<LCount-2>,<GCount-2>,<ICount-2>,<DCount-2>,<TLength-3>,<WACount-3>,<WUCount-3>,<Flags-1>,'|',*<Anchor-" + ((type.equals("crl")) ? "6" : "12") + ">"); header.append((char) 13); header.append((char) 10);
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header.append("# ---"); header.append((char) 13); header.append((char) 10);
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*/
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public static final Row CRG_accrow = new Row(
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"byte[] Referee-12," +
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"Cardinal UDate-3 {b64e}, Cardinal VDate-3 {b64e}, " +
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"Cardinal LCount-2 {b64e}, Cardinal GCount-2 {b64e}, Cardinal ICount-2 {b64e}, Cardinal DCount-2 {b64e}, Cardinal TLength-3 {b64e}, " +
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"Cardinal WACount-3 {b64e}, Cardinal WUCount-3 {b64e}, Cardinal Flags-1 {b64e}, " +
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"Cardinal FUDate-3 {b64e}, Cardinal FDDate-3 {b64e}, Cardinal LUDate-3 {b64e}, " +
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"Cardinal UCount-2 {b64e}, Cardinal PCount-2 {b64e}, Cardinal ACount-2 {b64e}, Cardinal VCount-2 {b64e}, Cardinal Vita-2 {b64e}",
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Base64Order.enhancedCoder);
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public static final Row CRG_colrow = new Row("byte[] Anchor-12", Base64Order.enhancedCoder);
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public static final String CRG_accname = "CRG-a-attr";
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public static final String CRG_seqname = "CRG-a-coli";
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public static final Row RCI_coli = new Row("byte[] RefereeDom-6", Base64Order.enhancedCoder);
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public static final String RCI_colname = "RCI-a-coli";
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private static boolean accumulate_upd(final File f, final AttrSeq acc) {
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// open file
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AttrSeq source_cr = null;
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try {
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source_cr = new AttrSeq(f, false);
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} catch (final IOException e) {
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return false;
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}
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// put elements in accumulator file
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final Iterator<String> el = source_cr.keys();
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String key;
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AttrSeq.Entry new_entry, acc_entry;
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int FUDate, FDDate, LUDate, UCount, PCount, ACount, VCount, Vita;
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Bitfield acc_flags, new_flags;
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while (el.hasNext()) {
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key = el.next();
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new_entry = source_cr.getEntry(key);
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new_flags = new Bitfield(Base64Order.enhancedCoder.encodeLong(new_entry.getAttr("Flags", 0), 1).getBytes());
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// enrich information with additional values
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if ((acc_entry = acc.getEntry(key)) != null) {
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FUDate = (int) acc_entry.getAttr("FUDate", 0);
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FDDate = (int) acc_entry.getAttr("FDDate", 0);
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LUDate = (int) acc_entry.getAttr("LUDate", 0);
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UCount = (int) acc_entry.getAttr("UCount", 0);
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PCount = (int) acc_entry.getAttr("PCount", 0);
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ACount = (int) acc_entry.getAttr("ACount", 0);
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VCount = (int) acc_entry.getAttr("VCount", 0);
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Vita = (int) acc_entry.getAttr("Vita", 0);
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// update counters and dates
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acc_entry.setSeq(new_entry.getSeqSet()); // need to be checked
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UCount++; // increase update counter
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PCount += (new_flags.get(1)) ? 1 : 0;
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ACount += (new_flags.get(2)) ? 1 : 0;
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VCount += (new_flags.get(3)) ? 1 : 0;
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// 'OR' the flags
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acc_flags = new Bitfield(Base64Order.enhancedCoder.encodeLong(acc_entry.getAttr("Flags", 0), 1).getBytes());
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for (int i = 0; i < 6; i++) {
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if (new_flags.get(i)) acc_flags.set(i, true);
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}
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acc_entry.setAttr("Flags", (int) Base64Order.enhancedCoder.decodeLong(acc_flags.exportB64()));
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} else {
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// initialize counters and dates
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acc_entry = acc.newEntry(key, new_entry.getAttrs(), new_entry.getSeqSet());
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FUDate = MicroDate.microDateHoursInt(System.currentTimeMillis()); // first update date
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FDDate = MicroDate.microDateHoursInt(System.currentTimeMillis()); // very difficult to compute; this is only a quick-hack
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LUDate = (int) new_entry.getAttr("VDate", 0);
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UCount = 0;
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PCount = (new_flags.get(1)) ? 1 : 0;
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ACount = (new_flags.get(2)) ? 1 : 0;
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VCount = (new_flags.get(3)) ? 1 : 0;
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Vita = 0;
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}
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// make plausibility check?
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// insert into accumulator
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acc_entry.setAttr("FUDate", FUDate);
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acc_entry.setAttr("FDDate", FDDate);
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acc_entry.setAttr("LUDate", LUDate);
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acc_entry.setAttr("UCount", UCount);
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acc_entry.setAttr("PCount", PCount);
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acc_entry.setAttr("ACount", ACount);
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acc_entry.setAttr("VCount", VCount);
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acc_entry.setAttr("Vita", Vita);
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acc.putEntrySmall(acc_entry);
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}
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return true;
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}
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public static boolean accumulate_upd(final File f, final ObjectIndex acc) throws IOException {
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// open file
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AttrSeq source_cr = null;
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try {
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source_cr = new AttrSeq(f, false);
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} catch (final IOException e) {
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return false;
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}
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// put elements in accumulator file
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final Iterator<String> el = source_cr.keys();
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String key;
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AttrSeq.Entry new_entry;
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Row.Entry acc_entry;
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int FUDate, FDDate, LUDate, UCount, PCount, ACount, VCount, Vita;
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Bitfield acc_flags, new_flags;
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while (el.hasNext()) {
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key = el.next();
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new_entry = source_cr.getEntry(key);
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new_flags = new Bitfield(Base64Order.enhancedCoder.encodeLong(new_entry.getAttr("Flags", 0), 1).getBytes());
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// enrich information with additional values
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if ((acc_entry = acc.get(key.getBytes())) != null) {
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FUDate = (int) acc_entry.getColLong("FUDate", 0);
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FDDate = (int) acc_entry.getColLong("FDDate", 0);
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LUDate = (int) acc_entry.getColLong("LUDate", 0);
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UCount = (int) acc_entry.getColLong("UCount", 0);
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PCount = (int) acc_entry.getColLong("PCount", 0);
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ACount = (int) acc_entry.getColLong("ACount", 0);
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VCount = (int) acc_entry.getColLong("VCount", 0);
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Vita = (int) acc_entry.getColLong("Vita", 0);
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// update counters and dates
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//seq.add(key.getBytes(), new_entry.getSeqCollection());
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UCount++; // increase update counter
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PCount += (new_flags.get(1)) ? 1 : 0;
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ACount += (new_flags.get(2)) ? 1 : 0;
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VCount += (new_flags.get(3)) ? 1 : 0;
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// 'OR' the flags
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acc_flags = new Bitfield(Base64Order.enhancedCoder.encodeLong(acc_entry.getColLong("Flags", 0), 1).getBytes());
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for (int i = 0; i < 6; i++) {
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if (new_flags.get(i)) acc_flags.set(i, true);
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}
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acc_entry.setCol("Flags", (int) Base64Order.enhancedCoder.decodeLong(acc_flags.exportB64()));
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} else {
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// initialize counters and dates
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acc_entry = acc.row().newEntry();
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acc_entry.setCol("Referee", key, null);
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for (int i = 1; i < acc.row().columns(); i++) {
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acc_entry.setCol(i, new_entry.getAttr(acc.row().column(i).nickname, 0));
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}
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//seq.put(key.getBytes(), new_entry.getSeqCollection());
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FUDate = MicroDate.microDateHoursInt(System.currentTimeMillis()); // first update date
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FDDate = MicroDate.microDateHoursInt(System.currentTimeMillis()); // very difficult to compute; this is only a quick-hack
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LUDate = (int) new_entry.getAttr("VDate", 0);
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UCount = 0;
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PCount = (new_flags.get(1)) ? 1 : 0;
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ACount = (new_flags.get(2)) ? 1 : 0;
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VCount = (new_flags.get(3)) ? 1 : 0;
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Vita = 0;
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}
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// make plausibility check?
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// insert into accumulator
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acc_entry.setCol("FUDate", FUDate);
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acc_entry.setCol("FDDate", FDDate);
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acc_entry.setCol("LUDate", LUDate);
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acc_entry.setCol("UCount", UCount);
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acc_entry.setCol("PCount", PCount);
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acc_entry.setCol("ACount", ACount);
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acc_entry.setCol("VCount", VCount);
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acc_entry.setCol("Vita", Vita);
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acc.put(acc_entry);
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}
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return true;
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}
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public static void accumulate(
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final File from_dir,
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final File tmp_dir,
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final File err_dir,
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final File bkp_dir,
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final File to_file,
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int max_files,
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final boolean newdb) throws IOException {
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if (!(from_dir.isDirectory())) {
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System.out.println("source path " + from_dir + " is not a directory.");
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return;
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}
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if (!(tmp_dir.isDirectory())) {
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System.out.println("temporary path " + tmp_dir + " is not a directory.");
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return;
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}
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if (!(err_dir.isDirectory())) {
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System.out.println("error path " + err_dir + " is not a directory.");
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return;
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}
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if (!(bkp_dir.isDirectory())) {
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System.out.println("back-up path " + bkp_dir + " is not a directory.");
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return;
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}
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// open target file
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AttrSeq acc = null;
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ObjectIndex newacc = null;
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IndexCell<WordReference> newseq = null;
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if (newdb) {
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final File path = to_file.getParentFile(); // path to storage place
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newacc = new Table(new File(path, CRG_accname), CRG_accrow, 0, 0, true, false);
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newseq = new IndexCell<WordReference>(
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path,
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"index",
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Segment.wordReferenceFactory,
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Base64Order.enhancedCoder,
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CRG_colrow,
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10000, 1000000000L, 20, null, 1000000);
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} else {
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if (!(to_file.exists())) {
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acc = new AttrSeq("Global Ranking Accumulator File",
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"<Referee-12>,'='," +
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"<UDate-3>,<VDate-3>,<LCount-2>,<GCount-2>,<ICount-2>,<DCount-2>,<TLength-3>,<WACount-3>,<WUCount-3>,<Flags-1>," +
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"<FUDate-3>,<FDDate-3>,<LUDate-3>,<UCount-2>,<PCount-2>,<ACount-2>,<VCount-2>,<Vita-2>," +
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"'|',*<Anchor-12>", false);
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acc.toFile(to_file);
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}
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acc = new AttrSeq(to_file, false);
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}
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// collect source files
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File source_file = null;
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final String[] files = from_dir.list();
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if (files.length < max_files) max_files = files.length;
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for (int i = 0; i < max_files; i++) {
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// open file
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source_file = new File(from_dir, files[i]);
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if (newdb) {
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/*
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if (accumulate_upd(source_file, newacc, newseq)) {
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// move CR file to temporary folder
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source_file.renameTo(new File(tmp_dir, files[i]));
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} else {
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// error case: the CR-file is not valid; move to error path
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source_file.renameTo(new File(err_dir, files[i]));
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}
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*/
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} else {
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if (accumulate_upd(source_file, acc)) {
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// move CR file to temporary folder
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source_file.renameTo(new File(tmp_dir, files[i]));
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} else {
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// error case: the CR-file is not valid; move to error path
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source_file.renameTo(new File(err_dir, files[i]));
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}
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}
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}
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try {
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if (newdb) {
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newacc.close();
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newseq.close();
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} else {
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// save accumulator to temporary file
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File tmp_file;
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if (to_file.toString().endsWith(".gz")) {
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tmp_file = new File(to_file.toString() + "." + (System.currentTimeMillis() % 1000) + ".prt.gz");
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} else {
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tmp_file = new File(to_file.toString() + "." + (System.currentTimeMillis() % 1000) + ".prt");
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}
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// store the file
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acc.toFile(tmp_file);
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// since this was successful, we remove the old file and move the new file to it
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FileUtils.deletedelete(to_file);
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tmp_file.renameTo(to_file);
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}
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FileUtils.moveAll(tmp_dir, bkp_dir);
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} catch (final IOException e) {
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// move previously processed files back
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e.printStackTrace();
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FileUtils.moveAll(tmp_dir, from_dir);
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}
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}
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public static int genrci(File cr_in, final File rci_out) throws IOException {
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if (!(cr_in.exists())) return 0;
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AttrSeq cr = new AttrSeq(cr_in, false);
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//if (rci_out.exists()) FileUtils.deletedelete(rci_out); // we want only fresh rci here (during testing)
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if (!(rci_out.exists())) {
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final AttrSeq rcix = new AttrSeq("Global Ranking Reverse Citation Index",
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"<AnchorDom-6>,'='," +
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"<UDate-3>," +
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"'|',*<Referee-12>", false);
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rcix.toFile(rci_out);
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}
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final AttrSeq rci = new AttrSeq(rci_out, false);
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// loop over all referees
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int count = 0;
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final int size = cr.size();
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final long start = System.currentTimeMillis();
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long l;
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final Iterator<String> i = cr.keys();
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String referee, anchor, anchorDom;
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AttrSeq.Entry cr_entry, rci_entry;
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long cr_UDate, rci_UDate;
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while (i.hasNext()) {
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referee = i.next();
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cr_entry = cr.getEntry(referee);
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cr_UDate = cr_entry.getAttr("UDate", 0);
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// loop over all anchors
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final Iterator<String> j = cr_entry.getSeqSet().iterator();
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while (j.hasNext()) {
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// get domain of anchors
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anchor = j.next();
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if (anchor.length() == 6) anchorDom = anchor; else anchorDom = anchor.substring(6);
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// update domain-specific entry
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rci_entry = rci.getEntry(anchorDom);
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if (rci_entry == null) rci_entry = rci.newEntry(anchorDom, false);
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rci_entry.addSeq(referee);
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// update Update-Date
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rci_UDate = rci_entry.getAttr("UDate", 0);
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if (cr_UDate > rci_UDate) rci_entry.setAttr("UDate", cr_UDate);
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// insert entry
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rci.putEntry(rci_entry);
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}
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count++;
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if ((count % 1000) == 0) {
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l = java.lang.Math.max(1, (System.currentTimeMillis() - start) / 1000);
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System.out.println("processed " + count + " citations, " + (count / l) + " per second, rci.size = " + rci.size() + ", " + ((size - count) / (count / l)) + " seconds remaining; mem = " + MemoryControl.available());
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}
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i.remove();
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}
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// finished. write to file
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cr = null;
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cr_in = null;
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rci.toFile(rci_out);
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return count;
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}
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public static int genrcix(final File cr_path_in, final File rci_path_out) throws IOException {
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//kelondroFlexTable acc = new kelondroFlexTable(cr_path_in, CRG_accname, kelondroBase64Order.enhancedCoder, 128 * 1024 * 1024, -1, CRG_accrow, true);
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final IndexCell<WordReference> seq = new IndexCell<WordReference>(
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cr_path_in, "index", Segment.wordReferenceFactory, Base64Order.enhancedCoder, CRG_colrow, 10000, 1000000000L, 20, null, 1000000);
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final IndexCell<WordReference> rci = new IndexCell<WordReference>(
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rci_path_out, "index", Segment.wordReferenceFactory, Base64Order.enhancedCoder, RCI_coli, 10000, 1000000000L, 20, null, 1000000);
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// loop over all referees
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int count = 0;
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final int size = seq.size();
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final long start = System.currentTimeMillis();
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long l;
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final CloneableIterator<ReferenceContainer<WordReference>> i = seq.references(null, false);
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ReferenceContainer<WordReference> keycollection;
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String referee, refereeDom, anchor, anchorDom;
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RowSet rci_entry;
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CloneableIterator<Row.Entry> cr_entry;
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while (i.hasNext()) {
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keycollection = i.next();
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referee = keycollection.getTermHashAsString();
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if (referee.length() == 6) refereeDom = referee; else refereeDom = referee.substring(6);
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cr_entry = keycollection.rows();
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// loop over all anchors
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Row.Entry entry;
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while (cr_entry.hasNext()) {
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entry = cr_entry.next();
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anchor = entry.getColString(0, null);
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|
if (anchor.length() == 6) anchorDom = anchor; else anchorDom = anchor.substring(6);
|
|
|
|
// update domain-specific entry
|
|
rci_entry = rci.get(anchorDom.getBytes(), null);
|
|
if (rci_entry == null) rci_entry = new RowSet(RCI_coli, 0);
|
|
rci_entry.add(refereeDom.getBytes());
|
|
|
|
// insert entry
|
|
//rci.put(anchorDom.getBytes(), rci_entry);
|
|
}
|
|
count++;
|
|
if ((count % 1000) == 0) {
|
|
l = java.lang.Math.max(1, (System.currentTimeMillis() - start) / 1000);
|
|
System.out.println("processed " + count + " citations, " + (count / l) + " per second, rci.size = " + rci.size() + ", " + ((size - count) / (count / l) / 60) + " minutes remaining; mem = " + MemoryControl.free());
|
|
}
|
|
}
|
|
|
|
// finished. write to file
|
|
seq.close();
|
|
rci.close();
|
|
return count;
|
|
}
|
|
|
|
public static void main(final String[] args) {
|
|
// java -classpath source de.anomic.plasma.kelondroPropFile -transcode DATA/RANKING/GLOBAL/CRG-test-unsorted-original.cr DATA/RANKING/GLOBAL/CRG-test-generated.cr
|
|
try {
|
|
if ((args.length == 5) && (args[0].equals("-accumulate"))) {
|
|
accumulate(new File(args[1]), new File(args[2]), new File(args[3]), new File(args[4]), new File(args[5]), Integer.parseInt(args[6]), true);
|
|
}
|
|
if ((args.length == 2) && (args[0].equals("-accumulate"))) {
|
|
final File root_path = new File(args[1]);
|
|
final File from_dir = new File(root_path, "DATA/RANKING/GLOBAL/014_othercr");
|
|
final File ready_dir = new File(root_path, "DATA/RANKING/GLOBAL/015_ready");
|
|
final File tmp_dir = new File(root_path, "DATA/RANKING/GLOBAL/016_tmp");
|
|
final File err_dir = new File(root_path, "DATA/RANKING/GLOBAL/017_err");
|
|
final File acc_dir = new File(root_path, "DATA/RANKING/GLOBAL/018_acc");
|
|
final String filename = "CRG-a-" + new DateFormatter().toShortString(true) + ".cr.gz";
|
|
final File to_file = new File(root_path, "DATA/RANKING/GLOBAL/020_con0/" + filename);
|
|
if (!(ready_dir.exists())) ready_dir.mkdirs();
|
|
if (!(tmp_dir.exists())) tmp_dir.mkdirs();
|
|
if (!(err_dir.exists())) err_dir.mkdirs();
|
|
if (!(acc_dir.exists())) acc_dir.mkdirs();
|
|
if (!(to_file.getParentFile().exists())) to_file.getParentFile().mkdirs();
|
|
FileUtils.moveAll(from_dir, ready_dir);
|
|
final long start = System.currentTimeMillis();
|
|
final int files = ready_dir.list().length;
|
|
accumulate(ready_dir, tmp_dir, err_dir, acc_dir, to_file, 1000, true);
|
|
final long seconds = java.lang.Math.max(1, (System.currentTimeMillis() - start) / 1000);
|
|
System.out.println("Finished accumulate for " + files + " files in " + seconds + " seconds (" + (files / seconds) + " files/second)");
|
|
}
|
|
if ((args.length == 3) && (args[0].equals("-recycle"))) {
|
|
final File root_path = new File(args[1]);
|
|
final int max_age_hours = Integer.parseInt(args[2]);
|
|
final File own_dir = new File(root_path, "DATA/RANKING/GLOBAL/010_owncr");
|
|
final File acc_dir = new File(root_path, "DATA/RANKING/GLOBAL/018_acc");
|
|
final File bkp_dir = new File(root_path, "DATA/RANKING/GLOBAL/019_bkp");
|
|
if (!(own_dir.exists())) return;
|
|
if (!(acc_dir.exists())) return;
|
|
if (!(bkp_dir.exists())) bkp_dir.mkdirs();
|
|
final String[] list = acc_dir.list();
|
|
final long start = System.currentTimeMillis();
|
|
final int files = list.length;
|
|
long d;
|
|
File f;
|
|
for (int i = 0; i < list.length; i++) {
|
|
f = new File(acc_dir, list[i]);
|
|
try {
|
|
d = (System.currentTimeMillis() - (new AttrSeq(f, false)).created()) / 3600000;
|
|
if (d > max_age_hours) {
|
|
// file is considered to be too old, it is not recycled
|
|
System.out.println("file " + f.getName() + " is old (" + d + " hours) and not recycled, only moved to backup");
|
|
f.renameTo(new File(bkp_dir, list[i]));
|
|
} else {
|
|
// file is fresh, it is duplicated and moved to be transferred to other peers again
|
|
System.out.println("file " + f.getName() + " is fresh (" + d + " hours old), recycled and moved to backup");
|
|
FileUtils.copy(f, new File(own_dir, list[i]));
|
|
f.renameTo(new File(bkp_dir, list[i]));
|
|
}
|
|
} catch (final IOException e) {
|
|
// there is something wrong with this file; delete it
|
|
System.out.println("file " + f.getName() + " is corrupted and deleted");
|
|
FileUtils.deletedelete(f);
|
|
}
|
|
}
|
|
final long seconds = java.lang.Math.max(1, (System.currentTimeMillis() - start) / 1000);
|
|
System.out.println("Finished recycling of " + files + " files in " + seconds + " seconds (" + (files / seconds) + " files/second)");
|
|
}
|
|
if ((args.length == 2) && (args[0].equals("-genrci"))) {
|
|
final File root_path = new File(args[1]);
|
|
final File cr_filedir = new File(root_path, "DATA/RANKING/GLOBAL/020_con0");
|
|
final File rci_filedir = new File(root_path, "DATA/RANKING/GLOBAL/030_rci0");
|
|
rci_filedir.mkdirs();
|
|
final long start = System.currentTimeMillis();
|
|
final int count = genrcix(cr_filedir, rci_filedir);
|
|
final long seconds = java.lang.Math.max(1, (System.currentTimeMillis() - start) / 1000);
|
|
System.out.println("Completed RCI generation: " + count + " citation references in " + seconds + " seconds (" + (count / seconds) + " CR-records/second)");
|
|
}
|
|
/*
|
|
if ((args.length == 2) && (args[0].equals("-genrci"))) {
|
|
File root_path = new File(args[1]);
|
|
File cr_filedir = new File(root_path, "DATA/RANKING/GLOBAL/020_con0");
|
|
File rci_file = new File(root_path, "DATA/RANKING/GLOBAL/030_rci0/RCI-0.rci.gz");
|
|
rci_file.getParentFile().mkdirs();
|
|
String[] cr_filenames = cr_filedir.list();
|
|
for (int i = 0; i < cr_filenames.length; i++) {
|
|
long start = System.currentTimeMillis();
|
|
int count = genrci(new File(cr_filedir, cr_filenames[i]), rci_file);
|
|
long seconds = java.lang.Math.max(1, (System.currentTimeMillis() - start) / 1000);
|
|
System.out.println("Completed RCI generation for input file " + cr_filenames[i] + ": " + count + " citation references in " + seconds + " seconds (" + (count / seconds) + " CR-records/second)");
|
|
}
|
|
}
|
|
*/
|
|
} catch (final IOException e) {
|
|
e.printStackTrace();
|
|
}
|
|
}
|
|
|
|
/*
|
|
Class-A File format:
|
|
|
|
UDate : latest update timestamp of the URL (as virtual date, hours since epoch)
|
|
VDate : last visit timestamp of the URL (as virtual date, hours since epoch)
|
|
LCount : count of links to local resources
|
|
GCount : count of links to global resources
|
|
ICount : count of links to images (in document)
|
|
DCount : count of links to other documents
|
|
TLength: length of the plain text content (bytes)
|
|
WACount: total number of all words in content
|
|
WUCount: number of unique words in content (removed doubles)
|
|
Flags : Flags (0=update, 1=popularity, 2=attention, 3=vote)
|
|
|
|
Class-a File format is an extension of Class-A plus the following attributes
|
|
FUDate : first update timestamp of the URL
|
|
FDDate : first update timestamp of the domain
|
|
LUDate : latest update timestamp of the URL
|
|
UCount : Update Counter (of 'latest update timestamp')
|
|
PCount : Popularity Counter (proxy clicks)
|
|
ACount : Attention Counter (search result clicks)
|
|
VCount : Votes
|
|
Vita : Vitality (normed number of updates per time)
|
|
*/
|
|
}
|