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A wrapper for OpenJDK CRaC API to build and run on any JDK
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// Copyright 2017-2020 Azul Systems, Inc.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice,
// this list of conditions and the following disclaimer.
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// 2. Redistributions in binary form must reproduce the above copyright notice,
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package org.crac;

/**
 * An interface for receiving checkpoint/restore notifications.
 *
 * The class that is interested in receiving a checkpoint/restore notification
 * implements this interface, and the object created with that class is
 * registered with a {@code Context}, using {@code register} method.
 */
public interface Resource {

    /**
     * Invoked by a {@code Context} as a notification about checkpoint.
     *
     * @param context {@code Context} providing notification
     * @throws Exception if the method have failed
     */
    void beforeCheckpoint(Context context) throws Exception;

    /**
     * Invoked by a {@code Context} as a notification about restore.
     *
     * @param context {@code Context} providing notification
     * @throws Exception if the method have failed
     */
    void afterRestore(Context context) throws Exception;
}