/*
* (C) Copyright 2012 Nuxeo SA (http://nuxeo.com/) and others.
*
* Licensed 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.
*
* Contributors:
* Anahide Tchertchian
*/
package org.nuxeo.runtime.service;
/**
* Interface for services that need to track when the resources they hold have been last modified.
* <p>
* This is useful to invalidate high-level cache when deploying components in hot reload.
*
* @since 5.6
*/
public interface TimestampedService {
/**
* Returns the last modification timestamp or null if unknown.
* <p>
* This method is useful for third-party code implementing caching on resources held by the component/service.
*
* @since 5.6
* @see #setLastModified(Long)
*/
Long getLastModified();
/**
* Sets the last modified date.
* <p>
* This method is supposed to be called whenever the component/service resources or state changes.
*
* @since 5.6
* @see #getLastModified()
*/
void setLastModified(Long lastModified);
}