/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.rocketmq.remoting.common;

import java.util.ArrayList;
import java.util.List;
import org.apache.rocketmq.remoting.api.channel.ChannelEventListener;
import org.apache.rocketmq.remoting.api.channel.RemotingChannel;

public class ChannelEventListenerGroup {
    private final List<ChannelEventListener> listenerList = new ArrayList<ChannelEventListener>();

    public int size() {
        return this.listenerList.size();
    }

    public void registerChannelEventListener(final ChannelEventListener listener) {
        if (listener != null) {
            this.listenerList.add(listener);
        }
    }

    public void onChannelConnect(final RemotingChannel channel) {
        for (ChannelEventListener listener : listenerList) {
            listener.onChannelConnect(channel);
        }
    }

    public void onChannelClose(final RemotingChannel channel) {
        for (ChannelEventListener listener : listenerList) {
            listener.onChannelClose(channel);
        }
    }

    public void onChannelException(final RemotingChannel channel, final Throwable cause) {
        for (ChannelEventListener listener : listenerList) {
            listener.onChannelException(channel, cause);
        }
    }

    public void onChannelIdle(final RemotingChannel channel) {
        for (ChannelEventListener listener : listenerList) {
            listener.onChannelIdle(channel);
        }
    }
}