// 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 com.cloud.vm;

import com.cloud.utils.Pair;
import com.cloud.vm.SystemVmLoadScanner.AfterScanAction;

public interface SystemVmLoadScanHandler<T> {
    String getScanHandlerName();

    boolean canScan();

    void onScanStart();

    T[] getScannablePools();

    boolean isPoolReadyForScan(T pool);

    Pair<AfterScanAction, Object> scanPool(T pool);

    void expandPool(T pool, Object actionArgs);

    void shrinkPool(T pool, Object actionArgs);

    void onScanEnd();
}