/**
* NOTE: This copyright does *not* cover user programs that use HQ
* program services by normal system calls through the application
* program interfaces provided as part of the Hyperic Plug-in Development
* Kit or the Hyperic Client Development Kit - this is merely considered
* normal use of the program, and does *not* fall under the heading of
* "derived work".
*
* Copyright (C) [2009-2010], VMware, Inc.
* This file is part of HQ.
*
* HQ is free software; you can redistribute it and/or modify
* it under the terms version 2 of the GNU General Public License as
* published by the Free Software Foundation. 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307
* USA.
*
*/
package org.hyperic.hq.events.server.session;
import java.io.Serializable;
import org.hyperic.hq.measurement.server.session.AlertConditionsSatisfiedZEvent;
/**
* Determines if an alert should be fired once the conditions associated with an
* alert definition have been met
* @author jhickey
*
*/
public interface ExecutionStrategy {
/**
* Indicates that all conditions associated with an alert definition have
* been met
* @param event An {@link AlertConditionsSatisfiedZEvent} to process
*/
boolean conditionsSatisfied(AlertConditionsSatisfiedZEvent event);
/**
*
* @return Any state held by this strategy that should be persisted between
* server restarts. May be null if no state saved.
*/
Serializable getState();
/**
* Initializes this strategy
* @param initialState Any state that was saved by the strategy with this
* alertDefinitionId the last time the server was shutdown. May be
* null if no state saved.
*/
void initialize(Serializable initialState);
}