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daf0f74361
search profiling showed, that a major amount of time is wasted by computing url hashes. The computation does an intranet-check, which needs a DNS lookup. This caused that each urlhash computation needed 100-200 milliseconds, which caused remote searches to delay at least 1 second more that necessary. The solution to this problem is to attach a URL hash to the URL data structure, because that means that the url hash value can be filled after retrieval of the URL from the database. The redesign of the url/urlhash management caused a major redesign of many parts of the software. Since some parts had been decided to be given up they had been removed during this change to avoid unnecessary maintenance of unused code. git-svn-id: https://svn.berlios.de/svnroot/repos/yacy/trunk@4074 6c8d7289-2bf4-0310-a012-ef5d649a1542
78 lines
2.6 KiB
Java
78 lines
2.6 KiB
Java
// URLLicense.java
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// (C) 2007 by Michael Peter Christen; mc@yacy.net, Frankfurt a. M., Germany
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// first published 03.07.2007 on http://yacy.net
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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.data;
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import java.util.HashMap;
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import java.util.Random;
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import de.anomic.yacy.yacyURL;
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public class URLLicense {
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// this class defines a license-generation for URLs
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// it is used in case of snippet- and preview-Image-fetching to grant also non-authorized users the usage of a image-fetcher servlet
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private Random random;
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private HashMap permissions;
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private int keylen;
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public URLLicense(int keylen) {
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this.permissions = new HashMap();
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this.random = new Random(System.currentTimeMillis());
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this.keylen = keylen;
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}
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public String aquireLicense(yacyURL url) {
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// generate license key
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String license = "";
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while (license.length() < keylen) license += Integer.toHexString(random.nextInt());
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license = license.substring(0, keylen);
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// store reference to url with license key
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synchronized (permissions) {
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permissions.put(license, url);
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}
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// return the license key
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return license;
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}
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public yacyURL releaseLicense(String license) {
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yacyURL url = null;
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synchronized (permissions) {
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url = (yacyURL) permissions.remove(license);
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}
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/*
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if (url == null) {
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System.out.println("DEBUG-URLLICENSE: no URL license present for code=" + license);
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} else {
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System.out.println("DEBUG-URLLICENSE: granted download of " + url.toString());
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}
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*/
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return url;
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}
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}
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