mirror of
https://github.com/yacy/yacy_search_server.git
synced 2024-09-19 00:01:41 +02:00
aaedc0405d
- Rewrote usage of HashMap/Map to concurrent versions (to avoid a CME=ConcurrentModificationException) - Rewrote ConnectionInfo (as an example) to use a synchronized iterator instead of synchronizing an already synced HashSet (see Collections call) - This avoids catching CMEs again - Commented out noisy ConcurrentLog.logException() call Conflicts: source/net/yacy/repository/LoaderDispatcher.java
120 lines
4.7 KiB
Java
120 lines
4.7 KiB
Java
// suggest.java
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// -----------------------
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// (C) 2010 by Michael Peter Christen; mc@yacy.net
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// first published 11.10.2010 in Frankfurt, Germany on http://yacy.net
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//
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// $LastChangedDate$
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// $LastChangedRevision$
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// $LastChangedBy$
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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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import java.util.ConcurrentModificationException;
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import java.util.SortedSet;
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import net.yacy.cora.protocol.HeaderFramework;
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import net.yacy.cora.protocol.RequestHeader;
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import net.yacy.cora.protocol.ResponseHeader;
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import net.yacy.cora.util.ConcurrentLog;
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import net.yacy.data.DidYouMean;
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import net.yacy.search.Switchboard;
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import net.yacy.server.serverObjects;
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import net.yacy.server.serverSwitch;
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import net.yacy.server.servletProperties;
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/**
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* for json format:
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* implementation of the opensearch suggestion extension, see
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* http://www.opensearch.org/Specifications/OpenSearch/Extensions/Suggestions/1.1
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* or
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* https://wiki.mozilla.org/Search_Service/Suggestions
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*
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* for xml format:
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* see Microsoft Search Suggestion Format
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* http://msdn.microsoft.com/en-us/library/cc848863%28VS.85%29.aspx
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* and
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* http://msdn.microsoft.com/en-us/library/cc848862%28v=VS.85%29.aspx
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*/
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public class suggest {
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private static final int meanMax = 30;
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public static serverObjects respond(final RequestHeader header, final serverObjects post, final serverSwitch env) {
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final Switchboard sb = (Switchboard) env;
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final servletProperties prop = new servletProperties();
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final String ext = header.get("EXT", "");
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final boolean json = ext.equals("json");
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final boolean xml = ext.equals("xml");
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final boolean more = sb.index.connectedRWI() || (post != null && post.containsKey("more")); // with RWIs connected the guessing is super-fast
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// get query
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final String originalquerystring = (post == null) ? "" : post.get("query", post.get("q", "")).trim();
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final String querystring = originalquerystring.replace('+', ' ');
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final int timeout = (post == null) ? 300 : post.getInt("timeout", 300);
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final int count = (post == null) ? 10 : Math.min(20, post.getInt("count", 10));
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int c = 0;
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if (more || (sb.index.getWordCountGuess(querystring) == 0)) {
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final DidYouMean didYouMean = new DidYouMean(sb.index, new StringBuilder(querystring));
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final SortedSet<StringBuilder> suggestions = didYouMean.getSuggestions(timeout, count);
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//[#[query]#,[#{suggestions}##[text]##(eol)#,::#(/eol)##{/suggestions}#]]
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synchronized (suggestions) {
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for (StringBuilder suggestion: suggestions) {
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if (c >= meanMax) break;
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try {
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String s = suggestion.toString();
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if (json) {
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prop.putJSON("suggestions_" + c + "_text", s);
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} else if (xml) {
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prop.putXML("suggestions_" + c + "_text", s);
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} else {
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prop.putHTML("suggestions_" + c + "_text", s);
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}
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prop.put("suggestions_" + c + "_eol", 0);
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c++;
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} catch (final ConcurrentModificationException e) {
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ConcurrentLog.logException(e);
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}
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}
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}
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}
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if (c > 0) {
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prop.put("suggestions_" + (c - 1) + "_eol", 1);
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}
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prop.put("suggestions", c);
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if (json) {
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prop.putJSON("query", originalquerystring);
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} else if (xml) {
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prop.putXML("query", originalquerystring);
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} else {
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prop.putHTML("query", originalquerystring);
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}
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// Adding CORS Access header for xml output
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if (xml) {
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final ResponseHeader outgoingHeader = new ResponseHeader(200);
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outgoingHeader.put(HeaderFramework.CORS_ALLOW_ORIGIN, "*");
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prop.setOutgoingHeader(outgoingHeader);
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}
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// return rewrite properties
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return prop;
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}
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}
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