fr.aliasource.index.core.impl.IndexManager.java Source code

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Here is the source code for fr.aliasource.index.core.impl.IndexManager.java

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/* ***** BEGIN LICENSE BLOCK *****
 * Version: GPL 2.0
 *
 * The contents of this file are subject to the GNU General Public
 * License Version 2 or later (the "GPL").
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Initial Developer of the Original Code is
 *   MiniG.org project members
 *
 * ***** END LICENSE BLOCK ***** */

package fr.aliasource.index.core.impl;

import java.util.HashMap;
import java.util.List;
import java.util.Map;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import fr.aliasource.index.core.IIndexFactory;
import fr.aliasource.index.core.IIndexingParameters;
import fr.aliasource.index.core.Index;
import fr.aliasource.index.core.SearchActivator;
import fr.aliasource.utils.RunnableExtensionLoader;

/**
 * Maintains the type to Index mapping, and creates new Indexes when needed.
 * 
 * @author tom
 * 
 */
public class IndexManager {

    private Map<String, Index> typeIndexes;
    private Log logger;
    private IIndexFactory factory;

    public IndexManager(IIndexingParameters params) {
        logger = LogFactory.getLog(getClass());
        typeIndexes = new HashMap<String, Index>();
        RunnableExtensionLoader<IIndexFactory> loader = new RunnableExtensionLoader<IIndexFactory>();
        List<IIndexFactory> factories = loader.loadExtensions(SearchActivator.PLUGIN_ID, "indexfactory",
                "index_factory", "implementation");
        if (factories.size() < 1) {
            logger.fatal("No IIndexFactory declared, abort");
            throw new RuntimeException("No IIndexFactory declared, abort");
        }
        factory = factories.get(0);
        factory.init(params);
    }

    public Index getIndex(String type) {
        return typeIndexes.get(type);
    }

    /**
     * The crawler lock is held while doing this, so this needs to be very fast
     * 
     * @param type
     * @param data
     */
    public void index(String type, Map<String, String> data) {
        typeIndexes.get(type).queueWrite(data);
    }

    public void setupIndex(String type) {
        Index idx = factory.getIndex(type);
        typeIndexes.put(type, idx);
    }

    public void delete(String type, String id) {
        typeIndexes.get(type).queueDeletion(id);
    }

}