mirror of
https://github.com/yacy/yacy_search_server.git
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714 lines
27 KiB
Java
714 lines
27 KiB
Java
/**
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* RowSet
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* Copyright 2006 by Michael Peter Christen; mc@yacy.net, Frankfurt a. M., Germany
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* First released 20.06.2006 at http://yacy.net
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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 library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library 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 GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program in the file lgpl21.txt
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* If not, see <http://www.gnu.org/licenses/>.
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*/
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package net.yacy.kelondro.index;
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import java.io.IOException;
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import java.io.Serializable;
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import java.util.Arrays;
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import java.util.Collection;
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import java.util.Iterator;
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import java.util.List;
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import java.util.Map;
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import java.util.Random;
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import java.util.TreeMap;
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import net.yacy.cora.document.ASCII;
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import net.yacy.cora.document.UTF8;
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import net.yacy.cora.order.CloneableIterator;
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import net.yacy.cora.util.SpaceExceededException;
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import net.yacy.kelondro.logging.Log;
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import net.yacy.kelondro.order.Base64Order;
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import net.yacy.kelondro.order.NaturalOrder;
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import net.yacy.kelondro.util.MemoryControl;
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public class RowSet extends RowCollection implements Index, Iterable<Row.Entry>, Serializable {
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private static final long serialVersionUID=-6036029762440788566L;
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private static final int collectionReSortLimit = 3000;
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public RowSet(final RowSet rs) {
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super(rs);
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}
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public RowSet(final Row rowdef, final int objectCount, final byte[] cache, final int sortBound) {
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super(rowdef, objectCount, cache, sortBound);
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assert rowdef.objectOrder != null;
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}
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public RowSet(final Row rowdef, final int objectCount) throws SpaceExceededException {
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super(rowdef, objectCount);
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assert rowdef.objectOrder != null;
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}
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public RowSet(final Row rowdef) {
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super(rowdef);
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assert rowdef.objectOrder != null;
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}
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/**
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* import an exported collection
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* @param rowdef
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* @param exportedCollectionRowEnvironment
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* @param columnInEnvironment
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*/
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public RowSet(final Row rowdef, final Row.Entry exportedCollectionRowEnvironment) {
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super(rowdef, exportedCollectionRowEnvironment);
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assert rowdef.objectOrder != null;
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}
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public final static RowSet importRowSet(final byte[] b, final Row rowdef) throws SpaceExceededException {
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assert b.length >= exportOverheadSize : "b.length = " + b.length;
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if (b.length < exportOverheadSize) return new RowSet(rowdef, 0);
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final int size = (int) NaturalOrder.decodeLong(b, 0, 4);
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assert size >= 0 : "size = " + size;
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if (size < 0) return new RowSet(rowdef, 0);
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final int orderbound = (int) NaturalOrder.decodeLong(b, 10, 4);
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assert orderbound >= 0 : "orderbound = " + orderbound;
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if (orderbound < 0) return new RowSet(rowdef, 0); // error
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final long alloc = ((long) size) * ((long) rowdef.objectsize);
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assert alloc <= Integer.MAX_VALUE : "alloc = " + alloc;
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if (alloc > Integer.MAX_VALUE) throw new SpaceExceededException((int) alloc, "importRowSet: alloc > Integer.MAX_VALUE");
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assert alloc == b.length - exportOverheadSize;
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if (alloc != b.length - exportOverheadSize) throw new SpaceExceededException((int) alloc, "importRowSet: alloc != b.length - exportOverheadSize");
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MemoryControl.request((int) alloc, true);
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final byte[] chunkcache;
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try {
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chunkcache = new byte[(int) alloc];
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} catch (final OutOfMemoryError e) {
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throw new SpaceExceededException((int) alloc, "importRowSet: OutOfMemoryError");
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}
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//assert b.length - exportOverheadSize == size * rowdef.objectsize : "b.length = " + b.length + ", size * rowdef.objectsize = " + size * rowdef.objectsize;
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if (b.length - exportOverheadSize != alloc) {
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Log.logSevere("RowSet", "exportOverheadSize wrong: b.length = " + b.length + ", size * rowdef.objectsize = " + size * rowdef.objectsize);
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return new RowSet(rowdef, 0);
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}
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System.arraycopy(b, (int) exportOverheadSize, chunkcache, 0, chunkcache.length);
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return new RowSet(rowdef, size, chunkcache, orderbound);
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}
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public final static int importRowCount(final long blength, final Row rowdef) {
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assert blength >= exportOverheadSize : "blength = " + blength;
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if (blength < exportOverheadSize) return 0;
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final int c = (int) ((blength - exportOverheadSize) / rowdef.objectsize);
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assert c >= 0;
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return c;
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}
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private RowSet(final Row rowdef, final byte[] chunkcache, final int chunkcount, final int sortBound, final long lastTimeWrote) {
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super(rowdef, chunkcache, chunkcount, sortBound, lastTimeWrote);
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}
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@Override
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public RowSet clone() {
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return new RowSet(super.rowdef, super.chunkcache, super.chunkcount, super.sortBound, super.lastTimeWrote);
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}
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@Override
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public void reset() {
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super.reset();
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}
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@Override
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public final synchronized boolean has(final byte[] key) {
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assert key.length == this.rowdef.primaryKeyLength;
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final int index = find(key, 0);
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return index >= 0;
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}
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@Override
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public final synchronized Row.Entry get(final byte[] key, final boolean forcecopy) {
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assert key.length == this.rowdef.primaryKeyLength;
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final int index = find(key, 0);
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if (index < 0) return null;
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return get(index, forcecopy);
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}
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@Override
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public Map<byte[], Row.Entry> get(final Collection<byte[]> keys, final boolean forcecopy) throws IOException, InterruptedException {
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final Map<byte[], Row.Entry> map = new TreeMap<byte[], Row.Entry>(row().objectOrder);
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Row.Entry entry;
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for (final byte[] key: keys) {
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entry = get(key, forcecopy);
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if (entry != null) map.put(key, entry);
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}
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return map;
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}
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/**
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* Adds the row to the index. The row is identified by the primary key of the row.
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* @param row a index row
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* @return true if this set did _not_ already contain the given row.
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* @throws IOException
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* @throws SpaceExceededException
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*/
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@Override
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public final boolean put(final Row.Entry entry) throws SpaceExceededException {
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assert (entry != null);
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final byte[] key = entry.getPrimaryKeyBytes();
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assert (key != null);
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final byte[] entrybytes = entry.bytes();
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assert entrybytes.length >= this.rowdef.primaryKeyLength;
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synchronized (this) {
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final int index = find(key, 0);
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if (index < 0) {
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super.addUnique(entry);
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return true;
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}
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final int sb = this.sortBound; // save the sortBound, because it is not altered (we replace at the same place)
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set(index, entry); // this may alter the sortBound, which we will revert in the next step
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this.sortBound = sb; // revert a sortBound altering
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return false;
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}
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}
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@Override
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public final Row.Entry replace(final Row.Entry entry) throws SpaceExceededException {
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assert (entry != null);
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final byte[] key = entry.getPrimaryKeyBytes();
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assert (key != null);
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final byte[] entrybytes = entry.bytes();
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assert entrybytes.length >= this.rowdef.primaryKeyLength;
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synchronized (this) {
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int index = -1;
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Row.Entry oldentry = null;
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// when reaching a specific amount of un-sorted entries, re-sort all
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if ((this.chunkcount - this.sortBound) > collectionReSortLimit) {
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sort();
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}
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index = find(key, 0);
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if (index < 0) {
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super.addUnique(entry);
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} else {
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oldentry = get(index, true);
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final int sb = this.sortBound; // save the sortBound, because it is not altered (we replace at the same place)
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set(index, entry); // this may alter the sortBound, which we will revert in the next step
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this.sortBound = sb; // revert a sortBound altering
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}
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return oldentry;
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}
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}
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public final synchronized long inc(final byte[] key, final int col, final long add, final Row.Entry initrow) throws SpaceExceededException {
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assert key.length == this.rowdef.primaryKeyLength;
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final int index = find(key, 0);
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if (index >= 0) {
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// the entry existed before
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final Row.Entry entry = get(index, false); // no clone necessary
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final long l = entry.incCol(col, add);
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set(index, entry);
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return l;
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} else if (initrow != null) {
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// create new entry
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super.addUnique(initrow);
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return initrow.getColLong(col);
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} else {
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// if initrow == null just do nothing
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// but return a Long.MIN_VALUE
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return Long.MIN_VALUE;
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}
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}
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/**
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* remove a byte[] from the set.
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* if the entry was found, return the entry, but delete the entry from the set
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* if the entry was not found, return null.
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*/
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@Override
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public final synchronized boolean delete(final byte[] a) {
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boolean exists = false;
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int index;
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assert a.length == this.rowdef.primaryKeyLength;
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while (true) {
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index = find(a, 0);
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if (index < 0) {
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return exists;
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}
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exists = true;
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super.removeRow(index, true); // keep order of collection!
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}
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}
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// perhaps not used - see ReferenceContainer.shrinkReferences()
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public final synchronized void delete(final List<byte[]> keys) {
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final int[] indexes = new int[keys.size()];
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for (int i = 0; i < keys.size(); i++) {
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indexes[i] = find(keys.get(i), 0);
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}
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// we will delete the entries in backward order
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// That means it is necessary that the order below the indexes is stable
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// therefore we can delete without keeping the order (since it still is stable below the deleted index)
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Arrays.sort(indexes);
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for (int i = indexes.length - 1; i >= 0; i--) {
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if (indexes[i] < 0) break;
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super.removeRow(indexes[i], false);
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}
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}
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@Override
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public final synchronized Row.Entry remove(final byte[] a) {
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Row.Entry entry = null;
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int index;
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assert a.length == this.rowdef.primaryKeyLength;
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while (true) {
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index = find(a, 0);
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if (index < 0) {
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return entry;
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}
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entry = super.get(index, true);
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super.removeRow(index, true); // keep order of collection!
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}
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}
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private final int find(final byte[] a, final int astart) {
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// returns the chunknumber; -1 if not found
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if (this.rowdef.objectOrder == null) return iterativeSearch(a, astart, 0, this.chunkcount);
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if ((this.chunkcount - this.sortBound) > collectionReSortLimit) {
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sort();
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}
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if (this.rowdef.objectOrder != null && this.rowdef.objectOrder instanceof Base64Order) {
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// first try to find in sorted area
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assert this.rowdef.objectOrder.wellformed(a, astart, this.rowdef.primaryKeyLength) : "not wellformed: " + UTF8.String(a, astart, this.rowdef.primaryKeyLength);
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}
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// first try to find in sorted area
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final int p = binarySearch(a, astart);
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if (p >= 0) return p;
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// then find in unsorted area
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return iterativeSearch(a, astart, this.sortBound, this.chunkcount);
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}
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private final int iterativeSearch(final byte[] key, final int astart, final int leftBorder, final int rightBound) {
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// returns the chunknumber
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for (int i = leftBorder; i < rightBound; i++) {
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assert key.length - astart >= this.rowdef.primaryKeyLength;
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if (match(key, astart, i)) return i;
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}
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return -1;
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}
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private final int binarySearch(final byte[] key, final int astart) {
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// returns the exact position of the key if the key exists,
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// or -1 if the key does not exist
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assert (this.rowdef.objectOrder != null);
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int l = 0;
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int rbound = this.sortBound;
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int p = 0;
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int d;
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while (l < rbound) {
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p = (l + rbound) >> 1;
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assert key.length - astart >= this.rowdef.primaryKeyLength;
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d = compare(key, astart, p);
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if (d == 0) return p;
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if (d < 0) rbound = p; else l = p + 1;
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}
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return -1;
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}
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protected final int binaryPosition(final byte[] key, final int astart) {
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// returns the exact position of the key if the key exists,
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// or a position of an entry that is greater than the key if the
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// key does not exist
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assert (this.rowdef.objectOrder != null);
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int l = 0;
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int rbound = this.sortBound;
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int p = 0;
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int d;
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while (l < rbound) {
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p = (l + rbound) >> 1;
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assert key.length - astart >= this.rowdef.primaryKeyLength;
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d = compare(key, astart, p);
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if (d == 0) return p;
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if (d < 0) rbound = p; else l = p + 1;
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}
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return l;
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}
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public final synchronized Iterator<byte[]> keys() {
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sort();
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return super.keys(true);
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}
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@Override
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public final synchronized CloneableIterator<byte[]> keys(final boolean up, final byte[] firstKey) {
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return new keyIterator(up, firstKey);
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}
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public final class keyIterator implements CloneableIterator<byte[]> {
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private final boolean up;
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private final byte[] first;
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private int p;
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final int bound;
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public keyIterator(final boolean up, byte[] firstKey) {
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// see that all elements are sorted
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sort();
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this.up = up;
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if (firstKey != null && firstKey.length == 0) firstKey = null;
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this.first = firstKey;
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this.bound = RowSet.this.sortBound;
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if (this.first == null) {
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this.p = 0;
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} else {
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assert this.first.length == RowSet.this.rowdef.primaryKeyLength : "first.length = " + this.first.length + ", rowdef.primaryKeyLength = " + RowSet.this.rowdef.primaryKeyLength;
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this.p = binaryPosition(this.first, 0); // check this to find bug in DHT selection enumeration
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}
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}
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@Override
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public final keyIterator clone(final Object second) {
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return new keyIterator(this.up, (byte[]) second);
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}
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@Override
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public final boolean hasNext() {
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if (this.p < 0) return false;
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if (this.p >= size()) return false;
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return (this.up) ? this.p < this.bound : this.p >= 0;
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}
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@Override
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public final byte[] next() {
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final byte[] key = getKey(this.p);
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if (this.up) this.p++; else this.p--;
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return key;
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}
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@Override
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public final void remove() {
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throw new UnsupportedOperationException();
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}
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@Override
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public void close() {
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}
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}
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@Override
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public final synchronized Iterator<Row.Entry> iterator() {
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// iterates kelondroRow.Entry - type entries
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sort();
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return super.iterator();
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}
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@Override
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public final synchronized CloneableIterator<Row.Entry> rows(final boolean up, final byte[] firstKey) {
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return new rowIterator(up, firstKey);
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}
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@Override
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public final synchronized CloneableIterator<Row.Entry> rows() {
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return new rowIterator(true, null);
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}
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public final class rowIterator implements CloneableIterator<Row.Entry> {
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private final boolean up;
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private final byte[] first;
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private int p;
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final int bound;
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public rowIterator(final boolean up, final byte[] firstKey) {
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// see that all elements are sorted
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sort();
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this.up = up;
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this.first = firstKey;
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this.bound = RowSet.this.sortBound;
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if (this.first == null) {
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this.p = 0;
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} else {
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assert this.first.length == RowSet.this.rowdef.primaryKeyLength;
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this.p = binaryPosition(this.first, 0); // check this to find bug in DHT selection enumeration
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}
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}
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@Override
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public final rowIterator clone(final Object second) {
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return new rowIterator(this.up, (byte[]) second);
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}
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@Override
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public final boolean hasNext() {
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if (this.p < 0) return false;
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if (this.p >= size()) return false;
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return (this.up) ? this.p < this.bound : this.p >= 0;
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}
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@Override
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public final Row.Entry next() {
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final Row.Entry entry = get(this.p, true);
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if (this.up) this.p++; else this.p--;
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return entry;
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}
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@Override
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public final void remove() {
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throw new UnsupportedOperationException();
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}
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@Override
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public void close() {
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}
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}
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/**
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* merge this row collection with another row collection.
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* The resulting collection is sorted and does not contain any doubles, which are also removed during the merge.
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* The new collection may be a copy of one of the old one, or can be an alteration of one of the input collections
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* After this merge, none of the input collections should be used, because they can be altered
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* @param c
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* @return
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* @throws SpaceExceededException
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*/
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public final RowSet merge(final RowSet c) throws SpaceExceededException {
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assert c != null;
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return mergeEnum(this, c);
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}
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/**
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* merge this row collection with another row collection using an simultanous iteration of the input collections
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* the current collection is not altered in any way, the returned collection is a new collection with copied content.
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* @param c
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* @return
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* @throws SpaceExceededException
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*/
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protected final static RowSet mergeEnum(final RowCollection c0, final RowCollection c1) throws SpaceExceededException {
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assert c0.rowdef == c1.rowdef : c0.rowdef.toString() + " != " + c1.rowdef.toString();
|
|
final RowSet r = new RowSet(c0.rowdef, c0.size() + c1.size());
|
|
try {
|
|
c0.sort();
|
|
} catch (final Throwable e) {
|
|
Log.logSevere("RowSet", "collection corrupted. cleaned. " + e.getMessage(), e);
|
|
c0.clear();
|
|
}
|
|
try {
|
|
c1.sort();
|
|
} catch (final Throwable e) {
|
|
Log.logSevere("RowSet", "collection corrupted. cleaned. " + e.getMessage(), e);
|
|
c1.clear();
|
|
}
|
|
int c0i = 0, c1i = 0;
|
|
int c0p, c1p;
|
|
int o;
|
|
final int objectsize = c0.rowdef.objectsize;
|
|
final int c0s = c0.size();
|
|
final int c1s = c1.size();
|
|
while (c0i < c0s && c1i < c1s) {
|
|
c0p = c0i * objectsize;
|
|
c1p = c1i * objectsize;
|
|
o = c0.rowdef.objectOrder.compare(
|
|
c0.chunkcache, c0p,
|
|
c1.chunkcache, c1p, c0.rowdef.primaryKeyLength);
|
|
if (o == 0) {
|
|
r.addSorted(c0.chunkcache, c0p, objectsize);
|
|
c0i++;
|
|
c1i++;
|
|
continue;
|
|
}
|
|
if (o < 0) {
|
|
r.addSorted(c0.chunkcache, c0p, objectsize);
|
|
c0i++;
|
|
continue;
|
|
}
|
|
if (o > 0) {
|
|
r.addSorted(c1.chunkcache, c1p, objectsize);
|
|
c1i++;
|
|
continue;
|
|
}
|
|
}
|
|
while (c0i < c0.size()) {
|
|
r.addSorted(c0.chunkcache, c0i * objectsize, objectsize);
|
|
c0i++;
|
|
}
|
|
while (c1i < c1.size()) {
|
|
r.addSorted(c1.chunkcache, c1i * objectsize, objectsize);
|
|
c1i++;
|
|
}
|
|
return r;
|
|
}
|
|
|
|
public static void main(final String[] args) {
|
|
// sort/uniq-test
|
|
/*
|
|
kelondroRow rowdef = new kelondroRow("Cardinal key-4 {b256}, byte[] payload-1", kelondroNaturalOrder.naturalOrder, 0);
|
|
kelondroRowSet rs = new kelondroRowSet(rowdef, 0);
|
|
Random random = new Random(0);
|
|
kelondroRow.Entry entry;
|
|
for (int i = 0; i < 10000000; i++) {
|
|
entry = rowdef.newEntry();
|
|
entry.setCol(0, Math.abs(random.nextLong() % 1000000));
|
|
entry.setCol(1, "a".getBytes());
|
|
rs.addUnique(entry);
|
|
}
|
|
System.out.println("before sort, size = " + rs.size());
|
|
rs.sort();
|
|
System.out.println("after sort, before uniq, size = " + rs.size());
|
|
rs.uniq(10000);
|
|
System.out.println("after uniq, size = " + rs.size());
|
|
*/
|
|
|
|
final String[] test = {
|
|
"eins......xxxx",
|
|
"zwei......xxxx",
|
|
"drei......xxxx",
|
|
"vier......xxxx",
|
|
"fuenf.....xxxx",
|
|
"sechs.....xxxx",
|
|
"sieben....xxxx",
|
|
"acht......xxxx",
|
|
"neun......xxxx",
|
|
"zehn......xxxx" };
|
|
final RowSet d = new RowSet(new Row("byte[] key-10, Cardinal x-4 {b256}", NaturalOrder.naturalOrder));
|
|
for (final String element : test)
|
|
try {
|
|
d.add(element.getBytes());
|
|
} catch (final SpaceExceededException e) {
|
|
e.printStackTrace();
|
|
}
|
|
for (final String element : test)
|
|
try {
|
|
d.add(element.getBytes());
|
|
} catch (final SpaceExceededException e) {
|
|
e.printStackTrace();
|
|
}
|
|
d.sort();
|
|
d.delete("fuenf".getBytes());
|
|
final Iterator<Row.Entry> ii = d.iterator();
|
|
String s;
|
|
System.out.print("INPUT-ITERATOR: ");
|
|
Row.Entry entry;
|
|
while (ii.hasNext()) {
|
|
entry = ii.next();
|
|
s = entry.getPrimaryKeyASCII().trim();
|
|
System.out.print(s + ", ");
|
|
if (s.equals("drei")) ii.remove();
|
|
}
|
|
System.out.println("");
|
|
System.out.println("INPUT-TOSTRING: " + d.toString());
|
|
d.sort();
|
|
System.out.println("SORTED : " + d.toString());
|
|
d.uniq();
|
|
System.out.println("UNIQ : " + d.toString());
|
|
d.trim();
|
|
System.out.println("TRIM : " + d.toString());
|
|
|
|
// second test
|
|
final Row row = new Row("byte[] key-10, Cardinal x-3 {b256}", NaturalOrder.naturalOrder);
|
|
RowSet c = new RowSet(row);
|
|
final Random rand = new Random(0);
|
|
long start = System.currentTimeMillis();
|
|
long t;
|
|
String w;
|
|
for (long k = 1; k <= 60000; k++) {
|
|
t = System.currentTimeMillis();
|
|
w = "a" + Long.toString(rand.nextLong());
|
|
try {
|
|
c.put(row.newEntry(new byte[][]{w.getBytes(), "000".getBytes()}));
|
|
//c.add(w.getBytes());
|
|
} catch (final SpaceExceededException e) {
|
|
e.printStackTrace();
|
|
}
|
|
if (k % 10000 == 0)
|
|
System.out.println("added " + k + " entries in " +
|
|
((t - start) / 1000) + " seconds, " +
|
|
(((t - start) > 1000) ? (k / ((t - start) / 1000)) : k) +
|
|
" entries/second, size = " + c.size());
|
|
}
|
|
System.out.println("bevore sort: " + (System.currentTimeMillis() - start) + " milliseconds, size: " + c.size());
|
|
c.sort();
|
|
System.out.println("after sort: " + (System.currentTimeMillis() - start) + " milliseconds, size: " + c.size());
|
|
c.uniq();
|
|
System.out.println("after uniq: " + (System.currentTimeMillis() - start) + " milliseconds, size: " + c.size());
|
|
System.out.println();
|
|
|
|
// remove test
|
|
start = System.currentTimeMillis();
|
|
c = new RowSet(new Row("byte[] a-12, byte[] b-12", Base64Order.enhancedCoder));
|
|
byte[] key;
|
|
final int testsize = 5000;
|
|
final byte[][] delkeys = new byte[testsize / 5][];
|
|
Random random = new Random(0);
|
|
for (int i = 0; i < testsize; i++) {
|
|
key = randomHash(random);
|
|
if (i % 5 != 0) continue;
|
|
delkeys[i / 5] = key;
|
|
}
|
|
random = new Random(0);
|
|
for (int i = 0; i < testsize; i++) {
|
|
key = randomHash(random);
|
|
try {
|
|
c.put(c.rowdef.newEntry(new byte[][]{key, key}));
|
|
} catch (final SpaceExceededException e) {
|
|
e.printStackTrace();
|
|
}
|
|
if (i % 1000 == 0) {
|
|
for (final byte[] delkey : delkeys)
|
|
c.delete(delkey);
|
|
c.sort();
|
|
}
|
|
}
|
|
for (final byte[] delkey : delkeys)
|
|
c.delete(delkey);
|
|
c.sort();
|
|
random = new Random(0);
|
|
for (int i = 0; i < testsize; i++) {
|
|
key = randomHash(random);
|
|
if (i % 5 == 0) continue;
|
|
if (c.get(key, true) == null) System.out.println("missing entry " + UTF8.String(key));
|
|
}
|
|
c.sort();
|
|
System.out.println("RESULT SIZE: " + c.size());
|
|
System.out.println("Time: " + ((System.currentTimeMillis() - start) / 1000) + " seconds");
|
|
System.exit(0);
|
|
}
|
|
|
|
public static byte[] randomHash(final long r0, final long r1) {
|
|
// a long can have 64 bit, but a 12-byte hash can have 6 * 12 = 72 bits
|
|
// so we construct a generic Hash using two long values
|
|
return ASCII.getBytes(
|
|
Base64Order.enhancedCoder.encodeLongSB(Math.abs(r0), 11).substring(5) +
|
|
Base64Order.enhancedCoder.encodeLongSB(Math.abs(r1), 11).substring(5));
|
|
}
|
|
public static byte[] randomHash(final Random r) {
|
|
return randomHash(r.nextLong(), r.nextLong());
|
|
}
|
|
|
|
@Override
|
|
public String filename() {
|
|
return null;
|
|
}
|
|
|
|
@Override
|
|
public void deleteOnExit() {
|
|
// do nothing, there is no file
|
|
}
|
|
|
|
}
|