/*
* 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.brooklyn.api.sensor;
import com.google.common.annotations.Beta;
/**
* The interface implemented by attribute sensors.
*/
public interface AttributeSensor<T> extends Sensor<T> {
/**
* @since 0.7.0
*/
@Beta
public enum SensorPersistenceMode {
/**
* Indicates that this sensor should be persisted, and its value should be read from
* persisted state on rebind.
*/
REQUIRED,
/**
* Indicates that this sensor should not be persisted; therefore its value for any entity
* will be null immediately after rebind.
*/
NONE;
}
/**
* The persistence mode of this sensor, to determine its behaviour for rebind.
*
* @since 0.7.0
*/
SensorPersistenceMode getPersistenceMode();
}