/************************************************************************* * Copyright 2009-2014 Eucalyptus Systems, Inc. * * 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 3 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, see http://www.gnu.org/licenses/. * * Please contact Eucalyptus Systems, Inc., 6755 Hollister Ave., Goleta * CA 93117, USA or visit http://www.eucalyptus.com/licenses/ if you need * additional information or have any questions. ************************************************************************/ package com.eucalyptus.stats; import java.util.List; /** * Interface for the directory and updates for sensor metrics * The SensorManager tracks registered sensors and is responsible * for executing them on their specified schedule. */ public interface SensorManager { /** * Is the manager ready and can it function */ public void check(); /** * Force update of all metrics synchronously. May interfere with * other running updates, so sensors should be thread-safe. * <p/> * Results are emitted in the normal fasion via the emitter service * * @throws Exception */ public void pollAll(); /** * Get metrics for each registered sensor without emitting them * * @return list of resulting metrics * @throws Exception */ public List<SystemMetric> getMetrics(); public void init(EventEmitterService emitter); public EventEmitterService getEventEmitterService(); public void start(); public void stop(); }