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OpenSearchServer is a powerful, enterprise-class, search engine program. Using the web user interface, the crawlers (web, file, database, ...) and the REST/RESTFul API you will be able to integrate quickly and easily advanced full-text search capabilities in your application. OpenSearchServer runs on Windows and Linux/Unix/BSD.

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/**   
 * License Agreement for OpenSearchServer
 *
 * Copyright (C) 2008-2012 Emmanuel Keller / Jaeksoft
 * 
 * http://www.open-search-server.com
 * 
 * This file is part of OpenSearchServer.
 *
 * OpenSearchServer is free software: you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *
 * OpenSearchServer is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with OpenSearchServer. 
 *  If not, see .
 **/

package com.jaeksoft.searchlib.cache;

import java.io.IOException;

import com.jaeksoft.searchlib.SearchLibException;
import com.jaeksoft.searchlib.analysis.PerFieldAnalyzer;
import com.jaeksoft.searchlib.function.expression.SyntaxError;
import com.jaeksoft.searchlib.index.DocSetHitCacheKey;
import com.jaeksoft.searchlib.index.DocSetHits;
import com.jaeksoft.searchlib.index.IndexConfig;
import com.jaeksoft.searchlib.index.ReaderAbstract;
import com.jaeksoft.searchlib.query.ParseException;
import com.jaeksoft.searchlib.request.AbstractSearchRequest;
import com.jaeksoft.searchlib.schema.Schema;
import com.jaeksoft.searchlib.schema.SchemaField;
import com.jaeksoft.searchlib.util.Timer;

public class SearchCache extends LRUCache {

	private IndexConfig indexConfig;

	public SearchCache(IndexConfig indexConfig) {
		super("Search cache", indexConfig.getSearchCache());
		this.indexConfig = indexConfig;
	}

	final public DocSetHits get(final ReaderAbstract reader,
			final AbstractSearchRequest searchRequest, final Schema schema,
			final SchemaField defaultField, final Timer timer)
			throws ParseException, SyntaxError, IOException,
			InstantiationException, IllegalAccessException,
			ClassNotFoundException, SearchLibException {
		rwl.w.lock();
		try {
			PerFieldAnalyzer analyzer = searchRequest.getAnalyzer();
			DocSetHitCacheKey key = new DocSetHitCacheKey(searchRequest,
					defaultField, analyzer);
			DocSetHits dsh = getAndPromote(key);
			if (dsh != null)
				return dsh;
			dsh = reader.newDocSetHits(searchRequest, schema, defaultField,
					analyzer, timer);
			put(key, dsh);
			return dsh;
		} finally {
			rwl.w.unlock();
		}
	}

	@Override
	public void setMaxSize(int newMaxSize) {
		super.setMaxSize(newMaxSize);
		indexConfig.setSearchCache(newMaxSize);
	}
}