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/*
 * Copyright 2018 Qunar, Inc.
 *
 * Licensed 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 qunar.tc.qmq.netty;

import io.netty.channel.ChannelHandlerContext;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import qunar.tc.qmq.monitor.QMon;

import java.util.concurrent.atomic.AtomicLong;

/**
 * @author keli.wang
 * @since 2018/7/18
 */
public class DefaultConnectionEventHandler implements ConnectionEventHandler {
    private static final Logger LOG = LoggerFactory.getLogger(ConnectionHandler.class);

    private final String name;
    private final AtomicLong counter = new AtomicLong(0);

    public DefaultConnectionEventHandler(final String name) {
        this.name = name;
        QMon.activeConnectionGauge(name, counter::doubleValue);
    }

    @Override
    public void channelActive(ChannelHandlerContext ctx) {
        LOG.info("[name: {}] client {} connected", name, ctx.channel().remoteAddress());
        counter.incrementAndGet();

    }

    @Override
    public void channelInactive(ChannelHandlerContext ctx) {
        LOG.info("[name: {}] client {} disconnected", name, ctx.channel().remoteAddress());
        counter.decrementAndGet();
    }
}