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558 lines
23 KiB
558 lines
23 KiB
// kelondroRowSet.java
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// (C) 2006 by Michael Peter Christen; mc@yacy.net, Frankfurt a. M., Germany
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// first published 20.06.2006 on http://www.anomic.de
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//
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// $LastChangedDate: 2006-04-02 22:40:07 +0200 (So, 02 Apr 2006) $
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// $LastChangedRevision: 1986 $
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// $LastChangedBy: orbiter $
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//
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// LICENSE
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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.kelondro;
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import java.io.DataInput;
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import java.io.DataInputStream;
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import java.io.IOException;
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import java.util.Date;
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import java.util.Iterator;
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import java.util.List;
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import java.util.Random;
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import de.anomic.server.logging.serverLog;
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public class kelondroRowSet extends kelondroRowCollection implements kelondroIndex {
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private static final int collectionReSortLimit = 400;
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private kelondroProfile profile;
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public kelondroRowSet(final kelondroRowSet rs) {
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super(rs);
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this.profile = rs.profile;
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}
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public kelondroRowSet(final kelondroRow 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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this.profile = new kelondroProfile();
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}
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public kelondroRowSet(final kelondroRow rowdef, final int objectCount) {
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super(rowdef, objectCount);
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assert rowdef.objectOrder != null;
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this.profile = new kelondroProfile();
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}
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public kelondroRowSet(final kelondroRow rowdef, final kelondroRow.Entry exportedCollectionRowEnvironment, final int columnInEnvironment) {
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super(rowdef, exportedCollectionRowEnvironment, columnInEnvironment);
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assert rowdef.objectOrder != null;
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this.profile = new kelondroProfile();
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}
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public void setOrdering(final kelondroByteOrder newOrder, final int newColumn) {
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assert newOrder != null;
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if ((rowdef.objectOrder == null) ||
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(!(rowdef.objectOrder.signature().equals(newOrder.signature()))) ||
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(newColumn != rowdef.primaryKeyIndex)) {
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rowdef.setOrdering(newOrder, newColumn);
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this.sortBound = 0;
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}
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}
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public static kelondroRowSet importRowSet(final DataInput is, final kelondroRow rowdef) throws IOException {
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final byte[] byte2 = new byte[2];
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final byte[] byte4 = new byte[4];
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is.readFully(byte4); final int size = (int) kelondroNaturalOrder.decodeLong(byte4);
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is.readFully(byte2); //short lastread = (short) kelondroNaturalOrder.decodeLong(byte2);
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is.readFully(byte2); //short lastwrote = (short) kelondroNaturalOrder.decodeLong(byte2);
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is.readFully(byte2); //String orderkey = new String(byte2);
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is.readFully(byte2); final short ordercol = (short) kelondroNaturalOrder.decodeLong(byte2);
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is.readFully(byte2); final short orderbound = (short) kelondroNaturalOrder.decodeLong(byte2);
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assert rowdef.primaryKeyIndex == ordercol;
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final byte[] chunkcache = new byte[size * rowdef.objectsize];
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is.readFully(chunkcache);
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return new kelondroRowSet(rowdef, size, chunkcache, orderbound);
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}
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public static int skipNextRowSet(final DataInputStream is, final kelondroRow rowdef) throws IOException {
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final byte[] byte2 = new byte[2];
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final byte[] byte4 = new byte[4];
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is.readFully(byte4); final int size = (int) kelondroNaturalOrder.decodeLong(byte4);
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is.readFully(byte2); //short lastread = (short) kelondroNaturalOrder.decodeLong(byte2);
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is.readFully(byte2); //short lastwrote = (short) kelondroNaturalOrder.decodeLong(byte2);
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is.readFully(byte2); //String orderkey = new String(byte2);
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is.readFully(byte2); final short ordercol = (short) kelondroNaturalOrder.decodeLong(byte2);
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is.readFully(byte2);
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assert rowdef.primaryKeyIndex == ordercol;
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int skip = size * rowdef.objectsize;
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while (skip > 0) skip -= is.skip(skip);
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return size * rowdef.objectsize + 14;
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}
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public void reset() {
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super.reset();
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this.profile = new kelondroProfile();
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}
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public synchronized boolean has(final byte[] key) {
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final long handle = profile.startRead();
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final int index = find(key, 0, key.length);
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profile.stopRead(handle);
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return index >= 0;
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}
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public synchronized kelondroRow.Entry get(final byte[] key) {
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return get(key, 0, key.length);
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}
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private kelondroRow.Entry get(final byte[] key, final int astart, final int alength) {
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final long handle = profile.startRead();
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final int index = find(key, astart, alength);
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final kelondroRow.Entry entry = (index >= 0) ? get(index, true) : null;
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profile.stopRead(handle);
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return entry;
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}
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public synchronized void putMultiple(final List<kelondroRow.Entry> rows) {
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final Iterator<kelondroRow.Entry> i = rows.iterator();
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while (i.hasNext()) put(i.next());
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}
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public kelondroRow.Entry put(final kelondroRow.Entry row, final Date entryDate) {
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return put(row);
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}
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public synchronized kelondroRow.Entry put(final kelondroRow.Entry entry) {
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assert (entry != null);
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assert (entry.getPrimaryKeyBytes() != null);
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//assert (!(serverLog.allZero(entry.getColBytes(super.sortColumn))));
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final long handle = profile.startWrite();
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int index = -1;
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kelondroRow.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(entry.bytes(), (rowdef.primaryKeyIndex < 0) ? 0 :super.rowdef.colstart[rowdef.primaryKeyIndex], super.rowdef.primaryKeyLength);
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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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set(index, entry);
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}
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profile.stopWrite(handle);
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return oldentry;
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}
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private synchronized kelondroRow.Entry remove(final byte[] a, final int start, final int length) {
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final int index = find(a, start, length);
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if (index < 0) return null;
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//System.out.println("remove: chunk found at index position (before remove) " + index + ", inset=" + serverLog.arrayList(super.chunkcache, super.rowdef.objectsize() * index, length + 10) + ", searchkey=" + serverLog.arrayList(a, start, length));
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final kelondroRow.Entry entry = super.get(index, true);
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super.removeRow(index, true);
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//System.out.println("remove: chunk found at index position (after remove) " + index + ", inset=" + serverLog.arrayList(super.chunkcache, super.rowdef.objectsize() * index, length) + ", searchkey=" + serverLog.arrayList(a, start, length));
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int findagainindex = 0;
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//System.out.println("kelondroRowSet.remove");
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assert (findagainindex = find(a, start, length)) < 0 : "remove: chunk found again at index position (after remove) " + findagainindex + ", index(before) = " + index + ", inset=" + serverLog.arrayList(super.chunkcache, super.rowdef.objectsize * findagainindex, length) + ", searchkey=" + serverLog.arrayList(a, start, length); // check if the remove worked
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return entry;
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}
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public kelondroRow.Entry remove(final byte[] a) {
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return remove(a, 0, a.length);
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}
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private int find(final byte[] a, final int astart, final int alength) {
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// returns the chunknumber; -1 if not found
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if (rowdef.objectOrder == null) return iterativeSearch(a, astart, alength, 0, this.chunkcount);
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if ((this.chunkcount - this.sortBound) > (collectionReSortLimit << 1)) {
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sort();
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}
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if ((this.rowdef.objectOrder != null) && (this.rowdef.objectOrder instanceof kelondroBase64Order) && (this.sortBound > 4000)) {
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// first try to find in sorted area
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assert this.rowdef.objectOrder.wellformed(a, astart, alength) : "not wellformed: " + new String(a, astart, alength);
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final byte[] compiledPivot = compilePivot(a, astart, alength);
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final int p = binarySearchCompiledPivot(compiledPivot);
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if (p >= 0) return p;
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// then find in unsorted area
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return iterativeSearchCompiledPivot(compiledPivot, this.sortBound, this.chunkcount);
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} else {
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// first try to find in sorted area
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final int p = binarySearch(a, astart, alength);
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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, alength, this.sortBound, this.chunkcount);
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}
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}
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private int iterativeSearch(final byte[] key, final int astart, final int alength, final int leftBorder, final int rightBound) {
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// returns the chunknumber
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if (rowdef.objectOrder == null) {
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for (int i = leftBorder; i < rightBound; i++) {
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if (match(key, astart, alength, i)) return i;
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}
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return -1;
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}
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// we dont do a special handling of kelondroBase64Order here, because tests showed that this produces too much overhead
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for (int i = leftBorder; i < rightBound; i++) {
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if (compare(key, astart, alength, i) == 0) return i;
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}
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return -1;
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}
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private int iterativeSearchCompiledPivot(final byte[] compiledPivot, final int leftBorder, final int rightBound) {
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// returns the chunknumber
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assert (rowdef.objectOrder != null);
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assert (rowdef.objectOrder instanceof kelondroBase64Order);
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for (int i = leftBorder; i < rightBound; i++) {
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if (comparePivot(compiledPivot, i) == 0) return i;
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}
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return -1;
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}
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private int binarySearch(final byte[] key, final int astart, final int alength) {
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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 (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 - l) >> 1);
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d = compare(key, astart, alength, 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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private int binarySearchCompiledPivot(final byte[] compiledPivot) {
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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 (rowdef.objectOrder != null);
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assert (rowdef.objectOrder instanceof kelondroBase64Order);
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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 - l) >> 1);
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d = comparePivot(compiledPivot, 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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public int binaryPosition(final byte[] key, final int astart, final int alength) {
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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 (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 - l) >> 1);
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d = compare(key, astart, alength, 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 kelondroProfile profile() {
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return profile;
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}
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public synchronized Iterator<byte[]> keys() {
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sort();
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return super.keys();
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}
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public synchronized kelondroCloneableIterator<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 class keyIterator implements kelondroCloneableIterator<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, 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 = sortBound;
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if (first == null) {
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p = 0;
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} else {
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p = binaryPosition(first, 0, first.length); // check this to find bug in DHT selection enumeration
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//System.out.println("binaryposition for key " + new String(firstKey) + " is " + p);
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}
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}
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public keyIterator clone(final Object second) {
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return new keyIterator(up, (byte[]) second);
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}
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public boolean hasNext() {
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if (p < 0) return false;
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if (p >= size()) return false;
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if (up) {
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return p < bound;
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} else {
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return p >= 0;
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}
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}
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public byte[] next() {
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final byte[] key = getKey(p);
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if (up) p++; else p--;
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return key;
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}
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public void remove() {
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throw new UnsupportedOperationException();
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}
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}
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public synchronized Iterator<kelondroRow.Entry> rows() {
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// iterates kelondroRow.Entry - type entries
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sort();
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return super.rows();
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}
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public synchronized kelondroCloneableIterator<kelondroRow.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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public class rowIterator implements kelondroCloneableIterator<kelondroRow.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 = sortBound;
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if (first == null) {
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p = 0;
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} else {
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p = binaryPosition(first, 0, first.length); // check this to find bug in DHT selection enumeration
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//System.out.println("binaryposition for key " + new String(firstKey) + " is " + p);
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}
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}
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public rowIterator clone(final Object second) {
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return new rowIterator(up, (byte[]) second);
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}
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public boolean hasNext() {
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if (p < 0) return false;
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if (p >= size()) return false;
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if (up) {
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return p < bound;
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} else {
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return p >= 0;
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}
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}
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public kelondroRow.Entry next() {
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final kelondroRow.Entry entry = get(p, true);
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if (up) p++; else p--;
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return entry;
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}
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public void remove() {
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throw new UnsupportedOperationException();
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}
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}
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public static void main(final String[] args) {
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// sort/uniq-test
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/*
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kelondroRow rowdef = new kelondroRow("Cardinal key-4 {b256}, byte[] payload-1", kelondroNaturalOrder.naturalOrder, 0);
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kelondroRowSet rs = new kelondroRowSet(rowdef, 0);
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Random random = new Random(0);
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kelondroRow.Entry entry;
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for (int i = 0; i < 10000000; i++) {
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entry = rowdef.newEntry();
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entry.setCol(0, Math.abs(random.nextLong() % 1000000));
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entry.setCol(1, "a".getBytes());
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rs.addUnique(entry);
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}
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System.out.println("before sort, size = " + rs.size());
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rs.sort();
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System.out.println("after sort, before uniq, size = " + rs.size());
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rs.uniq(10000);
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System.out.println("after uniq, size = " + rs.size());
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*/
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final String[] test = { "eins", "zwei", "drei", "vier", "fuenf", "sechs", "sieben", "acht", "neun", "zehn" };
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final kelondroRowSet d = new kelondroRowSet(new kelondroRow("byte[] key-10, Cardinal x-4 {b256}", kelondroNaturalOrder.naturalOrder, 0), 0);
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d.setOrdering(kelondroNaturalOrder.naturalOrder, 0);
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for (int ii = 0; ii < test.length; ii++) d.add(test[ii].getBytes());
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for (int ii = 0; ii < test.length; ii++) d.add(test[ii].getBytes());
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d.sort();
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d.remove("fuenf".getBytes(), 0, 5);
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final Iterator<kelondroRow.Entry> ii = d.rows();
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String s;
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System.out.print("INPUT-ITERATOR: ");
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kelondroRow.Entry entry;
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while (ii.hasNext()) {
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entry = ii.next();
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s = new String(entry.getColBytes(0)).trim();
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System.out.print(s + ", ");
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if (s.equals("drei")) ii.remove();
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}
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System.out.println("");
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System.out.println("INPUT-TOSTRING: " + d.toString());
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d.sort();
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System.out.println("SORTED : " + d.toString());
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d.uniq();
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System.out.println("UNIQ : " + d.toString());
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d.trim(false);
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System.out.println("TRIM : " + d.toString());
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/*
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// second test
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c = new kelondroRowSet(new kelondroRow(new int[]{10, 3}));
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c.setOrdering(kelondroNaturalOrder.naturalOrder, 0);
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Random rand = new Random(0);
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long start = System.currentTimeMillis();
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long t, d = 0;
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String w;
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for (long k = 0; k < 60000; k++) {
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t = System.currentTimeMillis();
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w = "a" + Long.toString(rand.nextLong());
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c.add(w.getBytes());
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if (k % 10000 == 0)
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System.out.println("added " + k + " entries in " +
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((t - start) / 1000) + " seconds, " +
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(((t - start) > 1000) ? (k / ((t - start) / 1000)) : k) +
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" entries/second, size = " + c.size());
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}
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System.out.println("bevore sort: " + ((System.currentTimeMillis() - start) / 1000) + " seconds");
|
|
c.shape();
|
|
System.out.println("after sort: " + ((System.currentTimeMillis() - start) / 1000) + " seconds");
|
|
c.uniq();
|
|
System.out.println("after uniq: " + ((System.currentTimeMillis() - start) / 1000) + " seconds");
|
|
System.out.println("RESULT SIZE: " + c.size());
|
|
System.out.println();
|
|
|
|
// third test
|
|
c = new kelondroRowSet(new kelondroRow(new int[]{10, 3}), 60000);
|
|
c.setOrdering(kelondroNaturalOrder.naturalOrder, 0);
|
|
rand = new Random(0);
|
|
start = System.currentTimeMillis();
|
|
d = 0;
|
|
for (long k = 0; k < 60000; k++) {
|
|
t = System.currentTimeMillis();
|
|
w = "a" + Long.toString(rand.nextLong());
|
|
if (c.get(w.getBytes(), 0, 10) == null) c.add(w.getBytes()); else d++;
|
|
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, " + d + " double, size = " + c.size() +
|
|
", sum = " + (c.size() + d));
|
|
}
|
|
System.out.println("RESULT SIZE: " + c.size());
|
|
*/
|
|
/*
|
|
// performance test for put
|
|
long start = System.currentTimeMillis();
|
|
kelondroRowSet c = new kelondroRowSet(new kelondroRow("byte[] a-12, byte[] b-12"), 0);
|
|
Random random = new Random(0);
|
|
byte[] key;
|
|
for (int i = 0; i < 100000; i++) {
|
|
key = randomHash(random);
|
|
c.put(c.rowdef.newEntry(new byte[][]{key, key}));
|
|
if (i % 1000 == 0) System.out.println(i + " entries. ");
|
|
}
|
|
System.out.println("RESULT SIZE: " + c.size());
|
|
System.out.println("Time: " + ((System.currentTimeMillis() - start) / 1000) + " seconds");
|
|
*/
|
|
|
|
// remove test
|
|
final long start = System.currentTimeMillis();
|
|
final kelondroRowSet c = new kelondroRowSet(new kelondroRow("byte[] a-12, byte[] b-12", kelondroBase64Order.enhancedCoder, 0), 0);
|
|
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);
|
|
c.put(c.rowdef.newEntry(new byte[][]{key, key}));
|
|
if (i % 1000 == 0) {
|
|
for (int j = 0; j < delkeys.length; j++) c.remove(delkeys[j]);
|
|
c.sort();
|
|
}
|
|
}
|
|
for (int j = 0; j < delkeys.length; j++) c.remove(delkeys[j]);
|
|
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) == null) System.out.println("missing entry " + new String(key));
|
|
}
|
|
c.sort();
|
|
System.out.println("RESULT SIZE: " + c.size());
|
|
System.out.println("Time: " + ((System.currentTimeMillis() - start) / 1000) + " seconds");
|
|
}
|
|
|
|
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 (kelondroBase64Order.enhancedCoder.encodeLong(Math.abs(r0), 11).substring(5) +
|
|
kelondroBase64Order.enhancedCoder.encodeLong(Math.abs(r1), 11).substring(5)).getBytes();
|
|
}
|
|
public static byte[] randomHash(final Random r) {
|
|
return randomHash(r.nextLong(), r.nextLong());
|
|
}
|
|
|
|
public String filename() {
|
|
return null;
|
|
}
|
|
|
|
public void deleteOnExit() {
|
|
// do nothing, there is no file
|
|
}
|
|
}
|