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/*
*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*
*/
package org.apache.qpid.server.store.berkeleydb.replication;
import org.apache.qpid.server.store.berkeleydb.EnvironmentFacade;
import com.sleepycat.bind.tuple.IntegerBinding;
import com.sleepycat.bind.tuple.LongBinding;
import com.sleepycat.je.Database;
import com.sleepycat.je.DatabaseConfig;
import com.sleepycat.je.DatabaseEntry;
import com.sleepycat.je.DatabaseException;
import com.sleepycat.je.Transaction;
import org.apache.log4j.Logger;
public class DatabasePinger
{
private static final Logger LOGGER = Logger.getLogger(DatabasePinger.class);
public static final String PING_DATABASE_NAME = "PINGDB";
private static final DatabaseConfig DATABASE_CONFIG =
DatabaseConfig.DEFAULT.setAllowCreate(true).setTransactional(true);
private static final int ID = 0;
public void pingDb(EnvironmentFacade facade)
{
try
{
if (LOGGER.isDebugEnabled())
{
LOGGER.debug("Beginning ping transaction");
}
final Database db = facade.openDatabase(PING_DATABASE_NAME,
DATABASE_CONFIG);
DatabaseEntry key = new DatabaseEntry();
IntegerBinding.intToEntry(ID, key);
DatabaseEntry value = new DatabaseEntry();
LongBinding.longToEntry(System.currentTimeMillis(), value);
Transaction txn = null;
try
{
txn = facade.beginTransaction();
db.put(txn, key, value);
txn.commit();
txn = null;
}
finally
{
if (LOGGER.isDebugEnabled())
{
LOGGER.debug("Ping transaction completed");
}
if (txn != null)
{
txn.abort();
}
}
}
catch (DatabaseException de)
{
facade.handleDatabaseException("DatabaseException from DatabasePinger ", de);
}
}
}
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