/*
* Copyright (c) 2008-2017, Hazelcast, Inc. All Rights Reserved.
*
* 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.
*/
package com.hazelcast.spi;
/**
* An Marker interface that signals that an operation is an urgent System Operation.
* <p/>
* System Operations can be executed by the {@link com.hazelcast.spi.OperationService} with an urgency. This
* is important because when a system is under load and its operation queues are filled up, you want the system to
* deal with system operation like the ones needed for partition-migration, with a high urgency. So that system
* remains responsive.
* <p/>
* In most cases this interface should not be used by normal user code because illegal usage of this interface,
* can influence the health of the Hazelcast cluster negatively.
*/
public interface UrgentSystemOperation {
}