server/src/com/cloud/vm/SystemVmLoadScanHandler.java

// Licensed to the Apache Software Foundation (ASF) under one
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// 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
//
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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();
}