/*
* 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.core.sensor;
import static com.google.common.base.Preconditions.checkNotNull;
import org.apache.brooklyn.api.sensor.AttributeSensor;
import org.apache.brooklyn.api.sensor.Sensor;
import com.google.common.reflect.TypeToken;
/**
* A {@link Sensor} describing an attribute change.
*/
public class BasicAttributeSensor<T> extends BasicSensor<T> implements AttributeSensor<T> {
private static final long serialVersionUID = -2493209215974820300L;
private final SensorPersistenceMode persistence;
public BasicAttributeSensor(Class<T> type, String name) {
this(type, name, name);
}
public BasicAttributeSensor(Class<T> type, String name, String description) {
this(TypeToken.of(type), name, description);
}
public BasicAttributeSensor(TypeToken<T> typeToken, String name) {
this(typeToken, name, name);
}
public BasicAttributeSensor(TypeToken<T> typeToken, String name, String description) {
this(typeToken, name, description, SensorPersistenceMode.REQUIRED);
}
public BasicAttributeSensor(TypeToken<T> typeToken, String name, String description, SensorPersistenceMode persistence) {
super(typeToken, name, description);
this.persistence = checkNotNull(persistence, "persistence");
}
@Override
public SensorPersistenceMode getPersistenceMode() {
// persistence could be null if deserializing state written by an old version; in which case default to 'required'
return (persistence != null) ? persistence : SensorPersistenceMode.REQUIRED;
}
}