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/*
* Copyright 2012 - 2024 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 com.google.inject.Injector;
import io.netty.channel.Channel;
import io.netty.channel.ChannelHandler;
import io.netty.channel.ChannelInboundHandler;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.ChannelOutboundHandler;
import io.netty.channel.ChannelPipeline;
import io.netty.handler.timeout.IdleStateHandler;
import org.traccar.config.Config;
import org.traccar.config.Keys;
import org.traccar.handler.network.AcknowledgementHandler;
import org.traccar.handler.network.MainEventHandler;
import org.traccar.handler.network.NetworkForwarderHandler;
import org.traccar.handler.network.NetworkMessageHandler;
import org.traccar.handler.network.OpenChannelHandler;
import org.traccar.handler.network.RemoteAddressHandler;
import org.traccar.handler.network.StandardLoggingHandler;
import java.util.Map;
public abstract class BasePipelineFactory extends ChannelInitializer<Channel> {
private final Injector injector;
private final TrackerConnector connector;
private final Config config;
private final String protocol;
private final int timeout;
public BasePipelineFactory(TrackerConnector connector, Config config, String protocol) {
this.injector = Main.getInjector();
this.connector = connector;
this.config = config;
this.protocol = protocol;
int timeout = config.getInteger(Keys.PROTOCOL_TIMEOUT.withPrefix(protocol));
if (timeout == 0) {
this.timeout = config.getInteger(Keys.SERVER_TIMEOUT);
} else {
this.timeout = timeout;
}
}
protected abstract void addTransportHandlers(PipelineBuilder pipeline);
protected abstract void addProtocolHandlers(PipelineBuilder pipeline);
@SuppressWarnings("unchecked")
public static <T extends ChannelHandler> T getHandler(ChannelPipeline pipeline, Class<T> clazz) {
for (Map.Entry<String, ChannelHandler> handlerEntry : pipeline) {
ChannelHandler handler = handlerEntry.getValue();
if (handler instanceof WrapperInboundHandler wrapperHandler) {
handler = wrapperHandler.getWrappedHandler();
} else if (handler instanceof WrapperOutboundHandler wrapperHandler) {
handler = wrapperHandler.getWrappedHandler();
}
if (clazz.isAssignableFrom(handler.getClass())) {
return (T) handler;
}
}
return null;
}
private <T> T injectMembers(T object) {
injector.injectMembers(object);
return object;
}
@Override
protected void initChannel(Channel channel) {
final ChannelPipeline pipeline = channel.pipeline();
addTransportHandlers(pipeline::addLast);
if (timeout > 0 && !connector.isDatagram()) {
pipeline.addLast(new IdleStateHandler(timeout, 0, 0));
}
pipeline.addLast(new OpenChannelHandler(connector));
if (config.hasKey(Keys.SERVER_FORWARD)) {
int port = config.getInteger(Keys.PROTOCOL_PORT.withPrefix(protocol));
pipeline.addLast(injectMembers(new NetworkForwarderHandler(port)));
}
pipeline.addLast(new NetworkMessageHandler());
pipeline.addLast(injectMembers(new StandardLoggingHandler(protocol)));
if (!connector.isDatagram() && !config.getBoolean(Keys.SERVER_INSTANT_ACKNOWLEDGEMENT)) {
pipeline.addLast(new AcknowledgementHandler());
}
addProtocolHandlers(handler -> {
if (handler instanceof BaseProtocolDecoder || handler instanceof BaseProtocolEncoder) {
injectMembers(handler);
} else {
if (handler instanceof ChannelInboundHandler channelHandler) {
handler = new WrapperInboundHandler(channelHandler);
} else if (handler instanceof ChannelOutboundHandler channelHandler) {
handler = new WrapperOutboundHandler(channelHandler);
}
}
pipeline.addLast(handler);
});
pipeline.addLast(injector.getInstance(RemoteAddressHandler.class));
pipeline.addLast(injector.getInstance(ProcessingHandler.class));
pipeline.addLast(injector.getInstance(MainEventHandler.class));
}
}
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