eventreceiver.java

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//
// This file is part of the OpenNMS(R) Application.
//
// OpenNMS(R) is Copyright (C) 2002-2003 The OpenNMS Group, Inc.  All rights reserved.
// OpenNMS(R) is a derivative work, containing both original code, included code and modified
// code that was published under the GNU General Public License. Copyrights for modified 
// and included code are below.
//
// OpenNMS(R) is a registered trademark of The OpenNMS Group, Inc.
//
// Copyright (C) 1999-2001 Oculan Corp.  All rights reserved.
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 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 General Public License for more details.                                                            
//
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// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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package org.opennms.netmgt.eventd.adaptors;

import org.opennms.core.fiber.InitializableFiber;

/**
 * This interface defines the contract that every type of adaptor event receiver
 * must fulfill. Every reciever is a fiber and will run independently of other
 * receivers in the system. When an event is received by an instance of this
 * interface it will pass the new event to the <code>EventHandler.event()</code>
 * method.
 * 
 * @author <a href="mailto:[e-mail]">Brian Weaver </a>
 * @author <a href="http;//www.opennms.org">OpenNMS </a>
 * 
 */
public interface EventReceiver extends InitializableFiber {
    /**
     * Adds a new event handler to receiver. When new events are received the
     * decoded event is passed to the handler.
     * 
     * @param handler
     *            A reference to an event handler
     * 
     */
    public void addEventHandler(EventHandler handler);

    /**
     * Removes an event handler from the list of handler called when an event is
     * received. The handler is removed based upon the method
     * <code>equals()</code> inherieted from the <code>Object</code> class.
     * 
     * @param handler
     *            A reference to the event handler.
     * 
     */
    public void removeEventHandler(EventHandler handler);
}