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/*
* Copyright 2022 Anton Tananaev (anton@traccar.org)
*
* 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 org.traccar;
import io.netty.channel.Channel;
import io.netty.channel.ChannelDuplexHandler;
import io.netty.channel.ChannelHandlerContext;
import io.netty.util.concurrent.Future;
import java.net.SocketAddress;
import java.util.concurrent.TimeUnit;
public abstract class BaseProtocolPoller extends ChannelDuplexHandler {
private final long interval;
private Future<?> timeout;
public BaseProtocolPoller(long interval) {
this.interval = interval;
}
protected abstract void sendRequest(Channel channel, SocketAddress remoteAddress);
@Override
public void channelActive(ChannelHandlerContext ctx) throws Exception {
super.channelActive(ctx);
if (interval > 0) {
timeout = ctx.executor().scheduleAtFixedRate(
() -> sendRequest(ctx.channel(), ctx.channel().remoteAddress()), 0, interval, TimeUnit.SECONDS);
}
}
@Override
public void channelInactive(ChannelHandlerContext ctx) throws Exception {
super.channelInactive(ctx);
if (timeout != null) {
timeout.cancel(false);
timeout = null;
}
}
}
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