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474 lines
18 KiB
474 lines
18 KiB
// plasmaCrawlProfile.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: 25.02.2004
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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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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 java.util.HashMap;
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import java.util.HashSet;
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import java.util.Iterator;
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import java.util.Map;
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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.kelondroDyn;
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import de.anomic.kelondro.kelondroException;
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import de.anomic.kelondro.kelondroMap;
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import de.anomic.server.serverCodings;
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public class plasmaCrawlProfile {
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private kelondroMap profileTable;
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private HashMap domsCache;
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private File profileTableFile;
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private int bufferkb;
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private long preloadTime;
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public plasmaCrawlProfile(File file, int bufferkb, long preloadTime) {
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this.profileTableFile = file;
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this.bufferkb = bufferkb;
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this.preloadTime = preloadTime;
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profileTableFile.getParentFile().mkdirs();
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kelondroDyn dyn = kelondroDyn.open(profileTableFile, bufferkb * 1024, preloadTime, indexURL.urlCrawlProfileHandleLength, 2000, '#');
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profileTable = new kelondroMap(dyn);
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domsCache = new HashMap();
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}
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public int cacheNodeChunkSize() {
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return profileTable.cacheNodeChunkSize();
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}
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public int cacheObjectChunkSize() {
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return profileTable.cacheObjectChunkSize();
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}
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public int[] cacheNodeStatus() {
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return profileTable.cacheNodeStatus();
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}
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public long[] cacheObjectStatus() {
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return profileTable.cacheObjectStatus();
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}
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private void resetDatabase() {
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// deletes the profile database and creates a new one
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if (profileTable != null) try { profileTable.close(); } catch (IOException e) {}
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if (!(profileTableFile.delete())) throw new RuntimeException("cannot delete crawl profile database");
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profileTableFile.getParentFile().mkdirs();
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kelondroDyn dyn = kelondroDyn.open(profileTableFile, bufferkb * 1024, preloadTime, indexURL.urlCrawlProfileHandleLength, 2000, '#');
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profileTable = new kelondroMap(dyn);
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}
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public void close() {
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try {
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profileTable.close();
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} catch (IOException e) {}
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}
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public int size() {
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return profileTable.size();
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}
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public Iterator profiles(boolean up) {
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// enumerates profile entries
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try {
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return new profileIterator(up);
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} catch (IOException e) {
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return new HashSet().iterator();
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}
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}
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public class profileIterator implements Iterator {
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// the iterator iterates all keys, which are byte[] objects
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kelondroDyn.dynKeyIterator handleIterator;
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String lastkey;
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public profileIterator(boolean up) throws IOException {
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handleIterator = profileTable.keys(up, false);
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lastkey = null;
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}
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public boolean hasNext() {
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try {
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return handleIterator.hasNext();
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} catch (kelondroException e) {
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resetDatabase();
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return false;
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}
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}
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public Object next() {
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try {
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lastkey = (String) handleIterator.next();
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return getEntry(lastkey);
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} catch (kelondroException e) {
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resetDatabase();
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return null;
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}
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}
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public void remove() {
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if (lastkey != null) try {
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removeEntry(lastkey);
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} catch (kelondroException e) {
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resetDatabase();
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}
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}
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}
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public void removeEntry(String handle) {
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try {
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profileTable.remove(handle);
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} catch (IOException e) {}
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}
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public entry newEntry(Map mem) {
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entry ne = new entry(mem);
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try {
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profileTable.set(ne.handle(), ne.map());
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} catch (kelondroException e) {
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resetDatabase();
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try {
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profileTable.set(ne.handle(), ne.map());
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} catch (IOException ee) {
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e.printStackTrace();
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System.exit(0);
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}
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} catch (IOException e) {
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resetDatabase();
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try {
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profileTable.set(ne.handle(), ne.map());
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} catch (IOException ee) {
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e.printStackTrace();
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System.exit(0);
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}
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}
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return ne;
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}
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public entry newEntry(String name, String startURL, String generalFilter, String specificFilter,
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int generalDepth, int specificDepth,
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int recrawlIfOlder /*minutes*/, int domFilterDepth, int domMaxPages,
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boolean crawlingQ,
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boolean storeHTCache, boolean storeTXCache,
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boolean localIndexing, boolean remoteIndexing,
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boolean xsstopw, boolean xdstopw, boolean xpstopw) {
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entry ne = new entry(name, startURL, generalFilter, specificFilter,
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generalDepth, specificDepth,
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recrawlIfOlder, domFilterDepth, domMaxPages,
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crawlingQ, storeHTCache, storeTXCache, localIndexing, remoteIndexing,
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xsstopw, xdstopw, xpstopw);
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try {
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profileTable.set(ne.handle(), ne.map());
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} catch (kelondroException e) {
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resetDatabase();
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try {
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profileTable.set(ne.handle(), ne.map());
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} catch (IOException ee) {
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e.printStackTrace();
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System.exit(0);
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}
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} catch (IOException e) {
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resetDatabase();
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try {
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profileTable.set(ne.handle(), ne.map());
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} catch (IOException ee) {
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e.printStackTrace();
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System.exit(0);
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}
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}
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return ne;
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}
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public entry getEntry(String handle) {
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try {
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Map m = profileTable.get(handle);
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if (m == null) return null;
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return new entry(m);
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} catch (IOException e) {
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return null;
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}
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}
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public class DomProfile {
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public String referrer;
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public int depth, count;
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public DomProfile(String ref, int d) {
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this.referrer = ref;
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this.depth = d;
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this.count = 1;
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}
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public void inc() {
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this.count++;
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}
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}
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public class entry {
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// this is a simple record structure that hold all properties of a single crawl start
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private Map mem;
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private Map doms;
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public entry(String name, String startURL, String generalFilter, String specificFilter,
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int generalDepth, int specificDepth,
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int recrawlIfOlder /*minutes*/, int domFilterDepth, int domMaxPages,
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boolean crawlingQ,
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boolean storeHTCache, boolean storeTXCache,
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boolean localIndexing, boolean remoteIndexing,
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boolean xsstopw, boolean xdstopw, boolean xpstopw) {
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String handle = kelondroBase64Order.enhancedCoder.encode(serverCodings.encodeMD5Raw(Long.toString(System.currentTimeMillis()))).substring(0, indexURL.urlCrawlProfileHandleLength);
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mem = new HashMap();
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mem.put("handle", handle);
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mem.put("name", name);
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mem.put("startURL", startURL);
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mem.put("generalFilter", generalFilter);
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mem.put("specificFilter", specificFilter);
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mem.put("generalDepth", Integer.toString(generalDepth));
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mem.put("specificDepth", Integer.toString(specificDepth));
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mem.put("recrawlIfOlder", Integer.toString(recrawlIfOlder));
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mem.put("domFilterDepth", Integer.toString(domFilterDepth));
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mem.put("domMaxPages", Integer.toString(domMaxPages));
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mem.put("crawlingQ", (crawlingQ) ? "true" : "false"); // crawling of urls with '?'
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mem.put("storeHTCache", (storeHTCache) ? "true" : "false");
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mem.put("storeTXCache", (storeTXCache) ? "true" : "false");
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mem.put("localIndexing", (localIndexing) ? "true" : "false");
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mem.put("remoteIndexing", (remoteIndexing) ? "true" : "false");
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mem.put("xsstopw", (xsstopw) ? "true" : "false"); // exclude static stop-words
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mem.put("xdstopw", (xdstopw) ? "true" : "false"); // exclude dynamic stop-word
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mem.put("xpstopw", (xpstopw) ? "true" : "false"); // exclude parent stop-words
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doms = new HashMap();
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}
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public String toString() {
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StringBuffer str = new StringBuffer();
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if (this.mem != null) {
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str.append(this.mem.toString());
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}
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return str.toString();
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}
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public entry(Map mem) {
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this.mem = mem;
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this.doms = (HashMap) domsCache.get(this.mem.get("handle"));
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if (this.doms == null) this.doms = new HashMap();
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}
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public Map map() {
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return mem;
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}
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public String handle() {
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String r = (String) mem.get("handle");
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if (r == null) return null; else return r;
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}
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public String name() {
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String r = (String) mem.get("name");
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if (r == null) return ""; else return r;
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}
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public String startURL() {
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String r = (String) mem.get("startURL");
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if (r == null) return null; else return r;
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}
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public String generalFilter() {
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String r = (String) mem.get("generalFilter");
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if (r == null) return ".*"; else return r;
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}
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public String specificFilter() {
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String r = (String) mem.get("specificFilter");
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if (r == null) return ".*"; else return r;
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}
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public int generalDepth() {
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String r = (String) mem.get("generalDepth");
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if (r == null) return 0; else try {
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return Integer.parseInt(r);
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} catch (NumberFormatException e) {
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return 0;
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}
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}
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public int specificDepth() {
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String r = (String) mem.get("specificDepth");
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if (r == null) return 0; else try {
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return Integer.parseInt(r);
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} catch (NumberFormatException e) {
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return 0;
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}
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}
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public long recrawlIfOlder() {
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// returns a long (millis) that is the minimum age that
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// an antry must have to be re-crawled
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String r = (String) mem.get("recrawlIfOlder");
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if (r == null) return Long.MAX_VALUE; else try {
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long l = Long.parseLong(r) * ((long) 60000);
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if (l < 0) return Long.MAX_VALUE; else return l;
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} catch (NumberFormatException e) {
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return 0;
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}
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}
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public int domFilterDepth() {
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// if the depth is equal or less to this depth,
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// then the current url feeds with its domain the crawl filter
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// if this is -1, all domains are feeded
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String r = (String) mem.get("domFilterDepth");
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if (r == null) return Integer.MAX_VALUE; else try {
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int i = Integer.parseInt(r);
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if (i < 0) return Integer.MAX_VALUE;
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return i;
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} catch (NumberFormatException e) {
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return Integer.MAX_VALUE;
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}
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}
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public int domMaxPages() {
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// this is the maximum number of pages that are crawled for a single domain
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// if -1, this means no limit
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String r = (String) mem.get("domMaxPages");
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if (r == null) return Integer.MAX_VALUE; else try {
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int i = Integer.parseInt(r);
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if (i < 0) return Integer.MAX_VALUE;
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return i;
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} catch (NumberFormatException e) {
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return Integer.MAX_VALUE;
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}
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}
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public boolean crawlingQ() {
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String r = (String) mem.get("crawlingQ");
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if (r == null) return false; else return (r.equals("true"));
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}
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public boolean storeHTCache() {
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String r = (String) mem.get("storeHTCache");
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if (r == null) return false; else return (r.equals("true"));
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}
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public boolean storeTXCache() {
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String r = (String) mem.get("storeTXCache");
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if (r == null) return false; else return (r.equals("true"));
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}
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public boolean localIndexing() {
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String r = (String) mem.get("localIndexing");
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if (r == null) return false; else return (r.equals("true"));
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}
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public boolean remoteIndexing() {
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String r = (String) mem.get("remoteIndexing");
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if (r == null) return false; else return (r.equals("true"));
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}
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public boolean excludeStaticStopwords() {
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String r = (String) mem.get("xsstopw");
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if (r == null) return false; else return (r.equals("true"));
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}
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public boolean excludeDynamicStopwords() {
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String r = (String) mem.get("xdstopw");
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if (r == null) return false; else return (r.equals("true"));
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}
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public boolean excludeParentStopwords() {
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String r = (String) mem.get("xpstopw");
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if (r == null) return false; else return (r.equals("true"));
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}
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public void changeEntry(String propName, String newValue) throws IOException {
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mem.put(propName, newValue);
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profileTable.set(handle(), mem);
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}
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public void domInc(String domain, String referrer, int depth) {
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synchronized (domain.intern()) {
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DomProfile dp = (DomProfile) doms.get(domain);
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if (dp == null) {
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// new domain
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doms.put(domain, new DomProfile(referrer, depth));
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} else {
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// increase counter
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dp.inc();
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doms.put(domain, dp);
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}
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}
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domsCache.put(this.mem.get("handle"), doms);
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}
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public boolean grantedDomAppearance(String domain) {
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int max = domFilterDepth();
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if (max == Integer.MAX_VALUE) return true;
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synchronized (domain.intern()) {
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DomProfile dp = (DomProfile) doms.get(domain);
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if (dp == null) {
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return 0 < max;
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} else {
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return dp.depth <= max;
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}
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}
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}
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public boolean grantedDomCount(String domain) {
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int max = domMaxPages();
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if (max == Integer.MAX_VALUE) return true;
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synchronized (domain.intern()) {
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DomProfile dp = (DomProfile) doms.get(domain);
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if (dp == null) {
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return 0 < max;
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} else {
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return dp.count <= max;
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}
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}
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}
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public int domSize() {
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return doms.size();
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}
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public boolean domExists(String domain) {
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if (domFilterDepth() == Integer.MAX_VALUE) return true;
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return doms.containsKey(domain);
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}
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public String domNames(boolean attr, int maxlength) {
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Iterator domnamesi = doms.entrySet().iterator();
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String domnames="";
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Map.Entry ey;
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DomProfile dp;
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while (domnamesi.hasNext()) {
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ey = (Map.Entry) domnamesi.next();
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dp = (DomProfile) ey.getValue();
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domnames += ((String) ey.getKey()) + ((attr) ? ("/r=" + dp.referrer + ", d=" + dp.depth + ", c=" + dp.count + " ") : " ") + "<br>";
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if ((maxlength > 0) && (domnames.length() >= maxlength)) {
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domnames = domnames.substring(0, maxlength-3) + "...";
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break;
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}
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}
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return domnames;
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}
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}
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}
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