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618 lines
27 KiB
618 lines
27 KiB
// plasmaNURL.java
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// -----------------------
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// part of YaCy
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// (C) by Michael Peter Christen; mc@anomic.de
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// first published on http://www.anomic.de
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// Frankfurt, Germany, 2004
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// last major change: 09.08.2004
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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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//
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// Using this software in any meaning (reading, learning, copying, compiling,
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// running) means that you agree that the Author(s) is (are) not responsible
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// for cost, loss of data or any harm that may be caused directly or indirectly
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// by usage of this softare or this documentation. The usage of this software
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// is on your own risk. The installation and usage (starting/running) of this
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// software may allow other people or application to access your computer and
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// any attached devices and is highly dependent on the configuration of the
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// software which must be done by the user of the software; the author(s) is
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// (are) also not responsible for proper configuration and usage of the
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// software, even if provoked by documentation provided together with
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// the software.
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//
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// Any changes to this file according to the GPL as documented in the file
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// gpl.txt aside this file in the shipment you received can be done to the
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// lines that follows this copyright notice here, but changes must not be
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// done inside the copyright notive above. A re-distribution must contain
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// the intact and unchanged copyright notice.
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// Contributions and changes to the program code must be marked as such.
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// NURL - noticed (known but not loaded) URL's
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package de.anomic.plasma;
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import java.io.File;
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import java.io.IOException;
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import de.anomic.net.URL;
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import java.util.ArrayList;
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import java.util.Date;
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import java.util.HashSet;
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import java.util.Iterator;
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import de.anomic.index.indexURL;
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import de.anomic.kelondro.kelondroBase64Order;
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import de.anomic.kelondro.kelondroException;
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import de.anomic.kelondro.kelondroRecords;
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import de.anomic.kelondro.kelondroStack;
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import de.anomic.kelondro.kelondroTree;
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import de.anomic.kelondro.kelondroRow;
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import de.anomic.server.logging.serverLog;
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import de.anomic.tools.bitfield;
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public class plasmaCrawlNURL extends indexURL {
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public static final int STACK_TYPE_NULL = 0; // do not stack
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public static final int STACK_TYPE_CORE = 1; // put on local stack
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public static final int STACK_TYPE_LIMIT = 2; // put on global stack
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public static final int STACK_TYPE_OVERHANG = 3; // put on overhang stack; links that are known but not crawled
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public static final int STACK_TYPE_REMOTE = 4; // put on remote-triggered stack
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public static final int STACK_TYPE_IMAGE = 11; // put on image stack
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public static final int STACK_TYPE_MOVIE = 12; // put on movie stack
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public static final int STACK_TYPE_MUSIC = 13; // put on music stack
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/**
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* column length definition for the {@link plasmaURL#urlHashCache} DB
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*/
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public static final int[] ce = {
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urlHashLength, // the url hash
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urlHashLength, // initiator
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urlStringLength, // the url as string
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urlHashLength, // the url's referrer hash
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urlNameLength, // the name of the url, from anchor tag <a>name</a>
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urlDateLength, // the time when the url was first time appeared
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urlCrawlProfileHandleLength, // the name of the prefetch profile handle
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urlCrawlDepthLength, // the prefetch depth so far, starts at 0
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urlParentBranchesLength, // number of anchors of the parent
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urlForkFactorLength, // sum of anchors of all ancestors
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urlFlagLength, // extra space
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urlHandleLength // extra handle
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};
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private final plasmaCrawlBalancer coreStack; // links found by crawling to depth-1
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private final plasmaCrawlBalancer limitStack; // links found by crawling at target depth
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private final plasmaCrawlBalancer overhangStack; // links found by crawling at depth+1
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private final plasmaCrawlBalancer remoteStack; // links from remote crawl orders
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private kelondroStack imageStack; // links pointing to image resources
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private kelondroStack movieStack; // links pointing to movie resources
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private kelondroStack musicStack; // links pointing to music resources
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private final HashSet stackIndex; // to find out if a specific link is already on any stack
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private File cacheStacksPath;
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private int bufferkb;
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private long preloadTime;
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initStackIndex initThead;
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public plasmaCrawlNURL(File cacheStacksPath, int bufferkb, long preloadTime) {
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super();
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this.cacheStacksPath = cacheStacksPath;
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this.bufferkb = bufferkb;
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this.preloadTime = preloadTime;
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// create a stack for newly entered entries
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if (!(cacheStacksPath.exists())) cacheStacksPath.mkdir(); // make the path
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openHashCache();
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File coreStackFile = new File(cacheStacksPath, "urlNoticeLocal0.stack");
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File limitStackFile = new File(cacheStacksPath, "urlNoticeLimit0.stack");
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File overhangStackFile = new File(cacheStacksPath, "urlNoticeOverhang0.stack");
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File remoteStackFile = new File(cacheStacksPath, "urlNoticeRemote0.stack");
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File imageStackFile = new File(cacheStacksPath, "urlNoticeImage0.stack");
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File movieStackFile = new File(cacheStacksPath, "urlNoticeMovie0.stack");
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File musicStackFile = new File(cacheStacksPath, "urlNoticeMusic0.stack");
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coreStack = new plasmaCrawlBalancer(coreStackFile);
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limitStack = new plasmaCrawlBalancer(limitStackFile);
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overhangStack = new plasmaCrawlBalancer(overhangStackFile);
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remoteStack = new plasmaCrawlBalancer(remoteStackFile);
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kelondroRow rowdef = new kelondroRow(new int[] {indexURL.urlHashLength});
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if (imageStackFile.exists()) try {
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imageStack = new kelondroStack(imageStackFile);
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} catch (IOException e) {
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imageStack = new kelondroStack(imageStackFile, rowdef, true);
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} else {
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imageStack = new kelondroStack(imageStackFile, rowdef, true);
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}
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if (movieStackFile.exists()) try {
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movieStack = new kelondroStack(movieStackFile);
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} catch (IOException e) {
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movieStack = new kelondroStack(movieStackFile, rowdef, true);
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} else {
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movieStack = new kelondroStack(movieStackFile, rowdef, true);
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}
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if (musicStackFile.exists()) try {
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musicStack = new kelondroStack(musicStackFile);
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} catch (IOException e) {
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musicStack = new kelondroStack(musicStackFile, rowdef, true);
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} else {
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musicStack = new kelondroStack(musicStackFile, rowdef, true);
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}
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// init stack Index
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stackIndex = new HashSet();
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(initThead = new initStackIndex()).start();
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}
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public void waitOnInitThread() {
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try {
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if (this.initThead != null) {
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this.initThead.join();
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}
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} catch (NullPointerException e) {
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} catch (InterruptedException e) {}
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}
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private void openHashCache() {
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File cacheFile = new File(cacheStacksPath, "urlNotice1.db");
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if (cacheFile.exists()) try {
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// open existing cache
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urlHashCache = new kelondroTree(cacheFile, bufferkb * 0x400, preloadTime, kelondroTree.defaultObjectCachePercent);
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} catch (IOException e) {
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cacheFile.delete();
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urlHashCache = new kelondroTree(cacheFile, bufferkb * 0x400, preloadTime, kelondroTree.defaultObjectCachePercent, new kelondroRow(ce), true);
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} else {
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// create new cache
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cacheFile.getParentFile().mkdirs();
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urlHashCache = new kelondroTree(cacheFile, bufferkb * 0x400, preloadTime, kelondroTree.defaultObjectCachePercent, new kelondroRow(ce), true);
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}
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}
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private void resetHashCache() {
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if (urlHashCache != null) {
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try {urlHashCache.close();} catch (IOException e) {}
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urlHashCache = null;
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File cacheFile = new File(cacheStacksPath, "urlNotice1.db");
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cacheFile.delete();
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}
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openHashCache();
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}
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public void close() {
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coreStack.close();
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limitStack.close();
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overhangStack.close();
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remoteStack.close();
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try {imageStack.close();} catch (IOException e) {}
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try {movieStack.close();} catch (IOException e) {}
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try {musicStack.close();} catch (IOException e) {}
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try { super.close(); } catch (IOException e) {}
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}
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public class initStackIndex extends Thread {
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public void run() {
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Iterator i;
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try {
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i = coreStack.iterator();
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while (i.hasNext()) stackIndex.add(new String((byte[]) i.next(), "UTF-8"));
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} catch (Exception e) {
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coreStack.reset();
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}
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try {
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i = limitStack.iterator();
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while (i.hasNext()) stackIndex.add(new String((byte[]) i.next(), "UTF-8"));
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} catch (Exception e) {
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limitStack.reset();
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}
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try {
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i = overhangStack.iterator();
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while (i.hasNext()) stackIndex.add(new String((byte[]) i.next(), "UTF-8"));
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} catch (Exception e) {
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overhangStack.reset();
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}
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try {
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i = remoteStack.iterator();
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while (i.hasNext()) stackIndex.add(new String((byte[]) i.next(), "UTF-8"));
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} catch (Exception e) {
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remoteStack.reset();
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}
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try {
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i = imageStack.iterator();
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while (i.hasNext()) stackIndex.add(new String(((kelondroRecords.Node) i.next()).getKey(), "UTF-8"));
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} catch (Exception e) {
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imageStack = kelondroStack.reset(imageStack);
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}
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try {
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i = movieStack.iterator();
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while (i.hasNext()) stackIndex.add(new String(((kelondroRecords.Node) i.next()).getKey(), "UTF-8"));
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} catch (Exception e) {
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movieStack = kelondroStack.reset(movieStack);
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}
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try {
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i = musicStack.iterator();
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while (i.hasNext()) stackIndex.add(new String(((kelondroRecords.Node) i.next()).getKey(), "UTF-8"));
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} catch (Exception e) {
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musicStack = kelondroStack.reset(musicStack);
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}
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plasmaCrawlNURL.this.initThead = null;
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}
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}
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/*
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private static String normalizeHost(String host) {
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if (host.length() > urlHostLength) host = host.substring(0, urlHostLength);
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host = host.toLowerCase();
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while (host.length() < urlHostLength) host = host + " ";
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return host;
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}
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*/
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private static String normalizeHandle(int h) {
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String d = Integer.toHexString(h);
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while (d.length() < urlHandleLength) d = "0" + d;
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return d;
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}
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public int stackSize() {
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// this does not count the overhang stack size
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return coreStack.size() + limitStack.size() + remoteStack.size();
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}
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public int stackSize(int stackType) {
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switch (stackType) {
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case STACK_TYPE_CORE: return coreStack.size();
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case STACK_TYPE_LIMIT: return limitStack.size();
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case STACK_TYPE_OVERHANG: return overhangStack.size();
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case STACK_TYPE_REMOTE: return remoteStack.size();
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case STACK_TYPE_IMAGE: return imageStack.size();
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case STACK_TYPE_MOVIE: return movieStack.size();
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case STACK_TYPE_MUSIC: return musicStack.size();
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default: return -1;
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}
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}
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public boolean existsInStack(String urlhash) {
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return stackIndex.contains(urlhash);
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}
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public synchronized Entry newEntry(String initiator, URL url, Date loaddate,
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String referrer, String name, String profile,
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int depth, int anchors, int forkfactor, int stackMode) {
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Entry e = new Entry(initiator, url, referrer, name, loaddate,
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profile, depth, anchors, forkfactor);
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push(stackMode, url.getHost(), e.hash);
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return e;
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}
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public synchronized Entry newEntry(Entry oldEntry, int stackMode) {
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if (oldEntry == null) return null;
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return newEntry(
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oldEntry.initiator(),
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oldEntry.url(),
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oldEntry.loaddate(),
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oldEntry.referrerHash(),
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oldEntry.name(),
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oldEntry.profileHandle(),
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oldEntry.depth(),
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oldEntry.anchors,
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oldEntry.forkfactor,
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stackMode
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);
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}
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private void push(int stackType, String domain, String hash) {
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try {
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switch (stackType) {
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case STACK_TYPE_CORE: coreStack.add(domain, hash.getBytes()); break;
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case STACK_TYPE_LIMIT: limitStack.add(domain, hash.getBytes()); break;
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case STACK_TYPE_OVERHANG: overhangStack.add(domain, hash.getBytes()); break;
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case STACK_TYPE_REMOTE: remoteStack.add(domain, hash.getBytes()); break;
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case STACK_TYPE_IMAGE: imageStack.push(imageStack.row().newEntry(new byte[][] {hash.getBytes()})); break;
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case STACK_TYPE_MOVIE: movieStack.push(movieStack.row().newEntry(new byte[][] {hash.getBytes()})); break;
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case STACK_TYPE_MUSIC: musicStack.push(musicStack.row().newEntry(new byte[][] {hash.getBytes()})); break;
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default: break;
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}
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stackIndex.add(hash);
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} catch (IOException er) {}
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}
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public Entry[] top(int stackType, int count) {
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switch (stackType) {
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case STACK_TYPE_CORE: return top(coreStack, count);
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case STACK_TYPE_LIMIT: return top(limitStack, count);
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case STACK_TYPE_OVERHANG: return top(overhangStack, count);
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case STACK_TYPE_REMOTE: return top(remoteStack, count);
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case STACK_TYPE_IMAGE: return top(imageStack, count);
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case STACK_TYPE_MOVIE: return top(movieStack, count);
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case STACK_TYPE_MUSIC: return top(musicStack, count);
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default: return null;
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}
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}
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public Iterator iterator(int stackType) {
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switch (stackType) {
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case STACK_TYPE_CORE: return coreStack.iterator();
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case STACK_TYPE_LIMIT: return limitStack.iterator();
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case STACK_TYPE_OVERHANG: return overhangStack.iterator();
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case STACK_TYPE_REMOTE: return remoteStack.iterator();
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case STACK_TYPE_IMAGE: return imageStack.iterator();
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case STACK_TYPE_MOVIE: return movieStack.iterator();
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case STACK_TYPE_MUSIC: return musicStack.iterator();
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default: return null;
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}
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}
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public Entry pop(int stackType) throws IOException {
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switch (stackType) {
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case STACK_TYPE_CORE: return pop(coreStack);
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case STACK_TYPE_LIMIT: return pop(limitStack);
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case STACK_TYPE_OVERHANG: return pop(overhangStack);
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case STACK_TYPE_REMOTE: return pop(remoteStack);
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case STACK_TYPE_IMAGE: return pop(imageStack);
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case STACK_TYPE_MOVIE: return pop(movieStack);
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case STACK_TYPE_MUSIC: return pop(musicStack);
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default: return null;
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}
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}
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public void shift(int fromStack, int toStack) {
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try {
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Entry entry = pop(fromStack);
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push(toStack, entry.url.getHost(), entry.hash());
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} catch (IOException e) {
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return;
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}
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}
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public void clear(int stackType) {
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try {
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switch (stackType) {
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case STACK_TYPE_CORE: coreStack.clear(); break;
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case STACK_TYPE_LIMIT: limitStack.clear(); break;
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case STACK_TYPE_OVERHANG: overhangStack.clear(); break;
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case STACK_TYPE_REMOTE: remoteStack.clear(); break;
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case STACK_TYPE_IMAGE: imageStack.clear(); break;
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case STACK_TYPE_MOVIE: movieStack.clear(); break;
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case STACK_TYPE_MUSIC: musicStack.clear(); break;
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default: return;
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}
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} catch (IOException e) {}
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}
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private Entry pop(kelondroStack stack) throws IOException {
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// this is a filo - pop
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if (stack.size() > 0) {
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Entry e = new Entry(new String(stack.pop().getColBytes(0)));
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stackIndex.remove(e.hash);
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return e;
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} else {
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throw new IOException("crawl stack is empty");
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}
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}
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private Entry pop(plasmaCrawlBalancer balancer) throws IOException {
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// this is a filo - pop
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if (balancer.size() > 0) {
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Entry e = new Entry(new String(balancer.get()));
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stackIndex.remove(e.hash);
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return e;
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} else {
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throw new IOException("balancer stack is empty");
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}
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}
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private Entry[] top(kelondroStack stack, int count) {
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// this is a filo - top
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if (count > stack.size()) count = stack.size();
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ArrayList list = new ArrayList(count);
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for (int i = 0; i < count; i++) {
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try {
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byte[] hash = stack.top(i).getColBytes(0);
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list.add(new Entry(new String(hash)));
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} catch (IOException e) {
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continue;
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}
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}
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return (Entry[]) list.toArray(new Entry[list.size()]);
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}
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private Entry[] top(plasmaCrawlBalancer balancer, int count) {
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// this is a filo - top
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if (count > balancer.size()) count = balancer.size();
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ArrayList list = new ArrayList(count);
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for (int i = 0; i < count; i++) {
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try {
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byte[] hash = balancer.top(i);
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list.add(new Entry(new String(hash)));
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} catch (IOException e) {
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continue;
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}
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}
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return (Entry[])list.toArray(new Entry[list.size()]);
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}
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public synchronized Entry getEntry(String hash) throws IOException {
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return new Entry(hash);
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}
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public class Entry {
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private String initiator; // the initiator hash, is NULL or "" if it is the own proxy;
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// if this is generated by a crawl, the own peer hash in entered
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private String hash; // the url's hash
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private String referrer; // the url's referrer hash
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private URL url; // the url as string
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private String name; // the name of the url, from anchor tag <a>name</a>
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private Date loaddate; // the time when the url was first time appeared
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private String profileHandle; // the name of the prefetch profile
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private int depth; // the prefetch depth so far, starts at 0
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private int anchors; // number of anchors of the parent
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private int forkfactor; // sum of anchors of all ancestors
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private bitfield flags;
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private int handle;
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public Entry(String initiator,
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URL url,
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String referrer,
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String name,
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Date loaddate,
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String profileHandle,
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int depth,
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|
int anchors,
|
|
int forkfactor
|
|
) {
|
|
// create new entry and store it into database
|
|
this.hash = urlHash(url);
|
|
this.initiator = initiator;
|
|
this.url = url;
|
|
this.referrer = (referrer == null) ? dummyHash : referrer;
|
|
this.name = (name == null) ? "" : name;
|
|
this.loaddate = (loaddate == null) ? new Date() : loaddate;
|
|
this.profileHandle = profileHandle; // must not be null
|
|
this.depth = depth;
|
|
this.anchors = anchors;
|
|
this.forkfactor = forkfactor;
|
|
this.flags = new bitfield(urlFlagLength);
|
|
this.handle = 0;
|
|
store();
|
|
}
|
|
|
|
public String toString() {
|
|
StringBuffer str = new StringBuffer();
|
|
str.append("hash: ").append(hash==null ? "null" : hash).append(" | ")
|
|
.append("initiator: ").append(initiator==null?"null":initiator).append(" | ")
|
|
.append("url: ").append(url==null?"null":url.toString()).append(" | ")
|
|
.append("referrer: ").append((referrer == null) ? dummyHash : referrer).append(" | ")
|
|
.append("name: ").append((name == null) ? "null" : name).append(" | ")
|
|
.append("loaddate: ").append((loaddate == null) ? new Date() : loaddate).append(" | ")
|
|
.append("profile: ").append(profileHandle==null?"null":profileHandle).append(" | ")
|
|
.append("depth: ").append(Integer.toString(depth)).append(" | ")
|
|
.append("forkfactor: ").append(Integer.toString(forkfactor)).append(" | ")
|
|
.append("flags: ").append((flags==null) ? "null" : flags.toString());
|
|
return str.toString();
|
|
}
|
|
|
|
public Entry(String hash) throws IOException {
|
|
// generates an plasmaNURLEntry using the url hash
|
|
// to speed up the access, the url-hashes are buffered
|
|
// in the hash cache.
|
|
// we have two options to find the url:
|
|
// - look into the hash cache
|
|
// - look into the filed properties
|
|
// if the url cannot be found, this returns null
|
|
this.hash = hash;
|
|
kelondroRow.Entry entry = urlHashCache.get(hash.getBytes());
|
|
if (entry != null) {
|
|
//try {
|
|
this.initiator = entry.getColString(1, null);
|
|
this.url = new URL(entry.getColString(2, null).trim());
|
|
this.referrer = (entry.empty(3)) ? dummyHash : entry.getColString(3, null);
|
|
this.name = (entry.empty(4)) ? "" : entry.getColString(4, null).trim();
|
|
this.loaddate = new Date(86400000 * entry.getColLongB64E(5));
|
|
this.profileHandle = (entry.empty(6)) ? null : entry.getColString(6, null).trim();
|
|
this.depth = (int) entry.getColLongB64E(7);
|
|
this.anchors = (int) entry.getColLongB64E(8);
|
|
this.forkfactor = (int) entry.getColLongB64E(9);
|
|
this.flags = new bitfield(entry.getColBytes(10));
|
|
this.handle = Integer.parseInt(entry.getColString(11, null), 16);
|
|
return;
|
|
//} catch (MalformedURLException e) {
|
|
// throw new IOException("plasmaCrawlNURL/Entry: " + e);
|
|
//}
|
|
} else {
|
|
// show that we found nothing
|
|
throw new IOException("NURL: hash " + hash + " not found");
|
|
//this.url = null;
|
|
}
|
|
}
|
|
|
|
private void store() {
|
|
// stores the values from the object variables into the database
|
|
String loaddatestr = kelondroBase64Order.enhancedCoder.encodeLong(loaddate.getTime() / 86400000, urlDateLength);
|
|
// store the hash in the hash cache
|
|
try {
|
|
// even if the entry exists, we simply overwrite it
|
|
byte[][] entry = new byte[][] {
|
|
this.hash.getBytes(),
|
|
(initiator == null) ? "".getBytes() : this.initiator.getBytes(),
|
|
this.url.toString().getBytes(),
|
|
this.referrer.getBytes(),
|
|
this.name.getBytes(),
|
|
loaddatestr.getBytes(),
|
|
(this.profileHandle == null) ? null : this.profileHandle.getBytes(),
|
|
kelondroBase64Order.enhancedCoder.encodeLong(this.depth, urlCrawlDepthLength).getBytes(),
|
|
kelondroBase64Order.enhancedCoder.encodeLong(this.anchors, urlParentBranchesLength).getBytes(),
|
|
kelondroBase64Order.enhancedCoder.encodeLong(this.forkfactor, urlForkFactorLength).getBytes(),
|
|
this.flags.getBytes(),
|
|
normalizeHandle(this.handle).getBytes()
|
|
};
|
|
urlHashCache.put(urlHashCache.row().newEntry(entry));
|
|
} catch (IOException e) {
|
|
serverLog.logSevere("PLASMA", "INTERNAL ERROR AT plasmaNURL:store:" + e.toString() + ", resetting NURL-DB");
|
|
e.printStackTrace();
|
|
resetHashCache();
|
|
} catch (kelondroException e) {
|
|
serverLog.logSevere("PLASMA", "plasmaCrawlNURL.store failed: " + e.toString() + ", resetting NURL-DB");
|
|
e.printStackTrace();
|
|
resetHashCache();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* return a url-hash, based on the md5 algorithm
|
|
* the result is a String of 12 bytes within a 72-bit space
|
|
* (each byte has an 6-bit range)
|
|
* that should be enough for all web pages on the world
|
|
*/
|
|
public String hash() {
|
|
return this.hash;
|
|
}
|
|
|
|
public String initiator() {
|
|
if (initiator == null) return null;
|
|
if (initiator.length() == 0) return null;
|
|
return initiator;
|
|
}
|
|
|
|
public boolean proxy() {
|
|
return (initiator() == null);
|
|
}
|
|
|
|
public String referrerHash() {
|
|
return this.referrer;
|
|
}
|
|
|
|
public URL url() {
|
|
return url;
|
|
}
|
|
|
|
public Date loaddate() {
|
|
return loaddate;
|
|
}
|
|
|
|
public String name() {
|
|
// return the creator's hash
|
|
return name;
|
|
}
|
|
|
|
public int depth() {
|
|
return depth;
|
|
}
|
|
|
|
public String profileHandle() {
|
|
return profileHandle;
|
|
}
|
|
}
|
|
|
|
}
|