/**
* Copyright (C) 2010-2014 Morgner UG (haftungsbeschränkt)
*
* This file is part of Structr <http://structr.org>.
*
* Structr 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.
*
* Structr 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 Structr. If not, see <http://www.gnu.org/licenses/>.
*/
package org.structr.core.log;
import java.util.HashMap;
import org.fusesource.hawtdb.api.BTreeIndexFactory;
import org.fusesource.hawtdb.api.IndexFactory;
import org.fusesource.hawtdb.api.MultiIndexFactory;
import org.fusesource.hawtdb.api.SortedIndex;
import org.fusesource.hawtdb.api.Transaction;
import org.fusesource.hawtdb.api.TxPageFile;
import org.structr.common.error.FrameworkException;
//~--- JDK imports ------------------------------------------------------------
import java.util.Iterator;
import java.util.Map;
import java.util.Map.Entry;
import java.util.logging.Level;
import java.util.logging.Logger;
//~--- classes ----------------------------------------------------------------
/**
* Returns the values previously stored under the given key with the
* {@link WriteLogCommand}.
*
* @author Axel Morgner
*/
public class ReadLogCommand extends LogServiceCommand {
private static final Logger logger = Logger.getLogger(ReadLogCommand.class.getName());
//~--- methods --------------------------------------------------------
public Map<String, Object> execute(String key) throws FrameworkException {
TxPageFile logDb = (TxPageFile) arguments.get("logDb");
Map<String, Object> result = new HashMap<>();
if (logDb != null) {
Transaction tx = logDb.tx();
MultiIndexFactory multiIndexFactory = new MultiIndexFactory(tx);
IndexFactory<String, Object> indexFactory = new BTreeIndexFactory<>();
try {
SortedIndex<String, Object> index = (SortedIndex<String, Object>) multiIndexFactory.openOrCreate(key, indexFactory);
Iterator<Entry<String, Object>> it = index.iterator();
while (it.hasNext()) {
Entry<String, Object> entry = it.next();
result.put(entry.getKey(), entry.getValue());
}
} catch (Throwable t) {
t.printStackTrace();
logger.log(Level.WARNING, "Could not read log db page for key {0}", key);
}
}
return result;
}
}