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/*
 * TeleStax, Open Source Cloud Communications
 * Copyright 2011-2016, TeleStax Inc. and individual contributors
 * by the @authors tag.
 *
 * This program is free software: you can redistribute it and/or modify
 * under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation; either version 3 of
 * the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see 
 *
 * This file incorporates work covered by the following copyright and
 * permission notice:
 *
 *   JBoss, Home of Professional Open Source
 *   Copyright 2007-2011, Red Hat, Inc. and individual contributors
 *   by the @authors tag. See the copyright.txt in the distribution for a
 *   full listing of individual contributors.
 *
 *   This is free software; you can redistribute it and/or modify it
 *   under the terms of the GNU Lesser General Public License as
 *   published by the Free Software Foundation; either version 2.1 of
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 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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 *
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 *   License along with this software; if not, write to the Free
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 */

package org.jdiameter.api;

/**
 * This interface allows to control the stack at overload moment
 *
 * @author [email protected]
 * @version 1.5.1 Final
 */
@SuppressWarnings("all") //3rd party lib
public interface OverloadManager {

    /**
     * Notify stack that parent application has overload
     *
     * @param id Overloaded application id (null for stack owner)
     * @param type type of overload (CPU, Memory..)
     * @param value value of overload
     */
    void parentAppOverloadDetected(ApplicationId id, int type, double value);

    /**
     * Notifies stack that parent application has overload cased
     *
     * @param id Overloaded application id (null for stack owner)
     * @param type type of overload (CPU, Memory..)
     */
    void parentAppOverloadCeased(ApplicationId id, int type);

    /**
     * Append overload listener
     *
     * @param listener overload listener instance
     * @param lowThreshold low value of overload threshold (for example 0.8 - 1.0 is overload Range)
     * @param highThreshold high value of overload threshold (for example 0.8 - 1.0 is overload Range)
     * @param qIndex overload element index
     */
    void addOverloadListener(OverloadListener listener, double lowThreshold, double highThreshold, int qIndex);

    /**
     * Remove overload listener
     *
     * @param listener overload listener instance
     * @param qIndex overload element index
     */
    void removeOverloadListener(OverloadListener listener, int qIndex);
}