Java tutorial
/** * The MIT License * Copyright (c) 2015 Estonian Information System Authority (RIA), Population Register Centre (VRK) * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package ee.ria.xroad.proxy.messagelog; import static ee.ria.xroad.proxy.messagelog.MessageLogDatabaseCtx.doInTransaction; import org.hibernate.Session; import org.joda.time.DateTime; import akka.actor.UntypedActor; import ee.ria.xroad.common.messagelog.MessageLogProperties; import lombok.extern.slf4j.Slf4j; /** * Deletes all archived log records from the database. */ @Slf4j public class LogCleaner extends UntypedActor { public static final String START_CLEANING = "doClean"; @Override public void onReceive(Object message) throws Exception { log.trace("onReceive({})", message); if (message.equals(START_CLEANING)) { try { doInTransaction(session -> { handleClean(session); return null; }); } catch (Exception e) { log.error("Failed to clean archived records from database", e); } } else { unhandled(message); } } protected void handleClean(Session session) { DateTime date = new DateTime(); date = date.minusDays(MessageLogProperties.getKeepRecordsForDays()); String hql = "delete AbstractLogRecord r where r.archived = true and " + "r.time <= " + date.getMillis(); int removed = session.createQuery(hql).executeUpdate(); if (removed == 0) { log.info("No archived records to remove from database"); } else { log.info("Removed {} archived records from database", removed); } } }