git-svn-id: https://svn.berlios.de/svnroot/repos/yacy/trunk@4343 6c8d7289-2bf4-0310-a012-ef5d649a1542pull/1/head
orbiter
17 years ago
parent
cbefc651ac
commit
f4e9ff6ce9
@ -1,277 +0,0 @@
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// indexCachedRI.java
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// -----------------------------
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// (C) 2006 by Michael Peter Christen; mc@anomic.de, Frankfurt a. M., Germany
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// first published 7.11.2006 on http://www.anomic.de
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//
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// This is a part of YaCy, a peer-to-peer based web search engine
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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.index;
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import java.util.ArrayList;
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import java.util.HashMap;
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import java.util.Iterator;
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import java.util.Map;
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import java.util.Set;
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import java.util.TreeSet;
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import de.anomic.kelondro.kelondroBase64Order;
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import de.anomic.kelondro.kelondroCloneableIterator;
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import de.anomic.kelondro.kelondroMergeIterator;
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import de.anomic.kelondro.kelondroOrder;
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import de.anomic.kelondro.kelondroRotateIterator;
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import de.anomic.kelondro.kelondroRow;
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import de.anomic.server.logging.serverLog;
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public class indexCachedRI implements indexRI {
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private kelondroRow payloadrow;
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private kelondroOrder indexOrder;
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private indexRAMRI riExtern, riIntern;
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private indexCollectionRI backend;
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public boolean busyCacheFlush; // shows if a cache flush is currently performed
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private int flushsize;
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public indexCachedRI(indexRAMRI riExtern, indexRAMRI riIntern, indexCollectionRI backend, kelondroOrder payloadorder, kelondroRow payloadrow, serverLog log) {
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this.riExtern = riExtern;
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this.riIntern = riIntern;
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this.backend = backend;
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this.indexOrder = payloadorder;
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this.payloadrow = payloadrow;
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this.busyCacheFlush = false;
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this.flushsize = 2000;
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}
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public kelondroRow payloadrow() {
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return payloadrow;
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}
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public int minMem() {
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return 1024 * 1024;
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}
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public void setWordFlushSize(int flushsize) {
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this.flushsize = flushsize;
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}
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public void flushControl() {
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// check for forced flush
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synchronized (this) {
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if (riExtern.size() > riExtern.getMaxWordCount()) {
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flushCache(riExtern, riExtern.size() + flushsize - riExtern.getMaxWordCount());
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}
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if (riIntern.size() > riIntern.getMaxWordCount()) {
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flushCache(riIntern, riIntern.size() + flushsize - riIntern.getMaxWordCount());
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}
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}
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}
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public long getUpdateTime(String wordHash) {
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indexContainer entries = getContainer(wordHash, null);
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if (entries == null) return 0;
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return entries.updated();
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}
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public void addEntries(indexContainer entries, long updateTime, boolean intern) {
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// add the entry
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if (intern) {
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riIntern.addEntries(entries, updateTime, true);
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} else {
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riExtern.addEntries(entries, updateTime, false);
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flushControl();
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}
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}
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public void flushCacheSome() {
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flushCacheSome(riExtern);
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flushCacheSome(riIntern);
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}
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private void flushCacheSome(indexRAMRI ram) {
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flushCache(ram, flushsize);
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while (ram.maxURLinCache() > 2048) flushCache(ram, 1);
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}
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private void flushCache(indexRAMRI ram, int count) {
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if (count <= 0) return;
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if (count > 5000) count = 5000;
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busyCacheFlush = true;
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String wordHash;
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ArrayList<indexContainer> containerList = new ArrayList<indexContainer>();
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synchronized (this) {
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for (int i = 0; i < count; i++) { // possible position of outOfMemoryError ?
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if (ram.size() == 0) break;
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// select one word to flush
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wordHash = ram.bestFlushWordHash();
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// move one container from ram to flush list
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indexContainer c = ram.deleteContainer(wordHash);
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if (c != null) containerList.add(c);
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}
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// flush the containers
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backend.addMultipleEntries(containerList);
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}
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busyCacheFlush = false;
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}
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public boolean hasContainer(String wordHash) {
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if (riExtern.hasContainer(wordHash)) return true;
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if (riIntern.hasContainer(wordHash)) return true;
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if (backend.hasContainer(wordHash)) return true;
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return false;
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}
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public indexContainer getContainer(String wordHash, Set<String> urlselection) {
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// get from cache
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indexContainer container = riExtern.getContainer(wordHash, urlselection);
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if (container == null) {
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container = riIntern.getContainer(wordHash, urlselection);
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} else {
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container.addAllUnique(riIntern.getContainer(wordHash, urlselection));
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}
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// get from collection index
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if (container == null) {
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container = backend.getContainer(wordHash, urlselection);
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} else {
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container.addAllUnique(backend.getContainer(wordHash, urlselection));
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}
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return container;
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}
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public Map<String, indexContainer> getContainers(Set<String> wordHashes, Set<String> urlselection, boolean interruptIfEmpty) {
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// return map of wordhash:indexContainer
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// retrieve entities that belong to the hashes
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HashMap<String, indexContainer> containers = new HashMap<String, indexContainer>();
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String singleHash;
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indexContainer singleContainer;
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Iterator<String> i = wordHashes.iterator();
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while (i.hasNext()) {
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// get next word hash:
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singleHash = i.next();
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// retrieve index
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singleContainer = getContainer(singleHash, urlselection);
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// check result
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if (((singleContainer == null) || (singleContainer.size() == 0)) && (interruptIfEmpty)) return new HashMap<String, indexContainer>();
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containers.put(singleHash, singleContainer);
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}
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return containers;
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}
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public int size() {
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return java.lang.Math.max(backend.size(), java.lang.Math.max(riIntern.size(), riExtern.size()));
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}
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public int indexSize(String wordHash) {
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int size = backend.indexSize(wordHash);
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size += riIntern.indexSize(wordHash);
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size += riExtern.indexSize(wordHash);
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return size;
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}
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public void close() {
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synchronized (this) {
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riIntern.close();
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riExtern.close();
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backend.close();
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}
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}
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public indexContainer deleteContainer(String wordHash) {
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indexContainer c = riIntern.deleteContainer(wordHash);
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if (c == null) c = riExtern.deleteContainer(wordHash); else c.addAllUnique(riExtern.deleteContainer(wordHash));
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if (c == null) c = backend.deleteContainer(wordHash); else c.addAllUnique(backend.deleteContainer(wordHash));
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return c;
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}
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public boolean removeEntry(String wordHash, String urlHash) {
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boolean removed = false;
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removed = removed | (riIntern.removeEntry(wordHash, urlHash));
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removed = removed | (riExtern.removeEntry(wordHash, urlHash));
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removed = removed | (backend.removeEntry(wordHash, urlHash));
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return removed;
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}
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public int removeEntries(String wordHash, Set<String> urlHashes) {
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int removed = 0;
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removed += riIntern.removeEntries(wordHash, urlHashes);
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removed += riExtern.removeEntries(wordHash, urlHashes);
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removed += backend.removeEntries(wordHash, urlHashes);
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return removed;
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}
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public String removeEntriesExpl(String wordHash, Set<String> urlHashes) {
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String removed = "";
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removed += riIntern.removeEntries(wordHash, urlHashes) + ", ";
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removed += riExtern.removeEntries(wordHash, urlHashes) + ", ";
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removed += backend.removeEntries(wordHash, urlHashes) + ", ";
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return removed;
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}
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public TreeSet<indexContainer> indexContainerSet(String startHash, boolean ramOnly, boolean rot, int count) {
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// creates a set of indexContainers
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// this does not use the dhtInCache
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kelondroOrder containerOrder = new indexContainerOrder((kelondroOrder) indexOrder.clone());
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containerOrder.rotate(startHash.getBytes());
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TreeSet<indexContainer> containers = new TreeSet<indexContainer>(containerOrder);
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Iterator<indexContainer> i = wordContainers(startHash, ramOnly, rot);
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if (ramOnly) count = Math.min(riExtern.size(), count);
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indexContainer container;
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while ((count > 0) && (i.hasNext())) {
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container = i.next();
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if ((container != null) && (container.size() > 0)) {
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containers.add(container);
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count--;
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}
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}
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return containers;
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}
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public kelondroCloneableIterator<indexContainer> wordContainers(String startHash, boolean rot) {
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// returns an iteration of indexContainers
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return wordContainers(startHash, false, rot);
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}
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public kelondroCloneableIterator<indexContainer> wordContainers(String startHash, boolean ramOnly, boolean rot) {
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kelondroCloneableIterator<indexContainer> i;
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if (ramOnly) {
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i = riExtern.wordContainers(startHash, false);
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} else {
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i = new kelondroMergeIterator(
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riExtern.wordContainers(startHash, false),
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backend.wordContainers(startHash, false),
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new indexContainerOrder(this.indexOrder),
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indexContainer.containerMergeMethod,
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true);
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}
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if (rot) {
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return new kelondroRotateIterator<indexContainer>(i, new String(kelondroBase64Order.zero(startHash.length())));
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} else {
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return i;
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}
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}
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}
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