import org.apache.catalina.tribes.ChannelListener; //导入依赖的package包/类
/**
 * Adds a channel listener to the channel.<br>
 * Channel listeners are uniquely identified using the equals(Object) method
 * @param channelListener ChannelListener
 */
@Override
public void addChannelListener(ChannelListener channelListener) {
    if (!this.channelListeners.contains(channelListener) ) {
        this.channelListeners.add(channelListener);
    } else {
        throw new IllegalArgumentException("Listener already exists:"+channelListener+"["+channelListener.getClass().getName()+"]");
    }
}
 

import org.apache.catalina.tribes.ChannelListener; //导入依赖的package包/类
/**
 * Adds a channel listener to the channel.<br>
 * Channel listeners are uniquely identified using the equals(Object) method
 * 
 * @param channelListener
 *            ChannelListener
 */
@Override
public void addChannelListener(ChannelListener channelListener) {
	if (!this.channelListeners.contains(channelListener)) {
		this.channelListeners.add(channelListener);
	} else {
		throw new IllegalArgumentException(
				"Listener already exists:" + channelListener + "[" + channelListener.getClass().getName() + "]");
	}
}
 

import org.apache.catalina.tribes.ChannelListener; //导入依赖的package包/类
/**
 *
 * Removes a channel listener from the channel.<br>
 * Channel listeners are uniquely identified using the equals(Object) method
 * @param channelListener ChannelListener
 */
@Override
public void removeChannelListener(ChannelListener channelListener) {
    channelListeners.remove(channelListener);
}
 

import org.apache.catalina.tribes.ChannelListener; //导入依赖的package包/类
/**
 *
 * Removes a channel listener from the channel.<br>
 * Channel listeners are uniquely identified using the equals(Object) method
 * 
 * @param channelListener
 *            ChannelListener
 */
@Override
public void removeChannelListener(ChannelListener channelListener) {
	channelListeners.remove(channelListener);
}