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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * by Oracle in the LICENSE file that accompanied this code.
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 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
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package org.graalvm.visualvm.core.scheduler;


/**
 * A task scheduled within the <code>Scheduler</code> service
 * @author Jaroslav Bachorik
 */
public interface ScheduledTask {
    //~ Static fields/initializers -----------------------------------------------------------------------------------------------
    /**
     * Property-change support
     */
    public static final String INTERVAL_PROPERTY = "Task.Interval"; // NOI18N

    //~ Methods ------------------------------------------------------------------------------------------------------------------

    /**
     * Modifies the interval the task is scheduled to run at
     * @param quantum The new interval
     */
    void setInterval(Quantum quantum);

    /**
     * The interval the task is scheduled to run at
     * @return Returns the number of seconds between two runs
     */
    Quantum getInterval();

    /**
     * Suspends the task
     * A shortcut to calling <code>setInterval(Quantum.SUSPENDED)</code>
     */
    void suspend();
    
    /**
     * Resumes a previously suspended task
     */
    void resume();
    
    /**
     * Indicates the suspension status of the task
     * @return Returns the suspension status of the task
     */
    boolean isSuspended();
    
}
