/*
* RHQ Management Platform
* Copyright (C) 2005-2008 Red Hat, Inc.
* All rights reserved.
*
* This program 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 version 2 of the License.
*
* This program 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 this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
package org.rhq.enterprise.server.alert;
import javax.ejb.EJB;
import javax.ejb.Stateless;
import javax.ejb.TransactionAttribute;
import javax.ejb.TransactionAttributeType;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.rhq.core.domain.alert.Alert;
import org.rhq.core.domain.alert.AlertDampeningEvent;
import org.rhq.core.domain.alert.AlertDefinition;
import org.rhq.enterprise.server.RHQConstants;
import org.rhq.enterprise.server.alert.engine.jms.model.AbstractAlertConditionMessage;
import org.rhq.enterprise.server.alert.engine.jms.model.ActiveAlertConditionMessage;
import org.rhq.enterprise.server.alert.engine.jms.model.InactiveAlertConditionMessage;
/**
* see {@link CachedConditionManagerLocal#processCachedConditionMessage(
* org.rhq.enterprise.server.alert.engine.jms.model.AbstractAlertConditionMessage, Integer)}
* for more information.
*
* @author Joseph Marques
*/
@Stateless
public class CachedConditionManagerBean implements CachedConditionManagerLocal {
private final Log log = LogFactory.getLog(CachedConditionManagerBean.class);
@PersistenceContext(unitName = RHQConstants.PERSISTENCE_UNIT_NAME)
private EntityManager entityManager;
@EJB
private AlertDefinitionManagerLocal alertDefinitionManager;
@EJB
private AlertConditionLogManagerLocal alertConditionLogManager;
@Override
@TransactionAttribute(TransactionAttributeType.REQUIRES_NEW)
public Alert processCachedConditionMessageNewTx(AbstractAlertConditionMessage conditionMessage, Integer definitionId) {
Alert result = null;
/*
* note that ctime is the time when the condition was known to be true, not the time we're persisting the
* condition log message
*/
if (conditionMessage instanceof ActiveAlertConditionMessage) {
ActiveAlertConditionMessage activeConditionMessage = (ActiveAlertConditionMessage) conditionMessage;
if (alertDefinitionManager.isEnabled(definitionId) == false) {
if (log.isDebugEnabled()) {
log.debug("AlertDefinition[id=" //
+ activeConditionMessage.getAlertConditionId() //
+ "] was already disabled " //
+ "(likely due to recovery logic disablement on earlier messages in this process batch), " //
+ "ignoring " //
+ activeConditionMessage);
}
return result;
}
alertConditionLogManager.updateUnmatchedLogByAlertConditionId(activeConditionMessage.getAlertConditionId(),
activeConditionMessage.getTimestamp(), activeConditionMessage.getValue());
result = alertConditionLogManager.checkForCompletedAlertConditionSet(activeConditionMessage
.getAlertConditionId());
} else if (conditionMessage instanceof InactiveAlertConditionMessage) {
// first do some bookkeeping by removing partially matched condition logs
alertConditionLogManager.removeUnmatchedLogByAlertConditionId(conditionMessage.getAlertConditionId());
// then create a NEGATIVE dampening event, to breakup any contiguous POSITIVE events for correct processing
AlertDefinition flyWeightDefinition = new AlertDefinition();
flyWeightDefinition.setId(definitionId);
AlertDampeningEvent event = new AlertDampeningEvent(flyWeightDefinition, AlertDampeningEvent.Type.NEGATIVE);
entityManager.persist(event);
} else {
log.error("Unsupported message type sent to consumer for processing: "
+ conditionMessage.getClass().getSimpleName());
}
return result;
}
}