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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.bootstrap.Bootstrap;
import io.netty.channel.group.ChannelGroup;
import io.netty.channel.group.DefaultChannelGroup;
import io.netty.channel.socket.nio.NioSocketChannel;
import io.netty.handler.ssl.SslHandler;
import io.netty.util.concurrent.Future;
import io.netty.util.concurrent.GenericFutureListener;
import io.netty.util.concurrent.GlobalEventExecutor;
import org.traccar.config.Config;
import org.traccar.config.Keys;
import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLEngine;
import java.util.concurrent.TimeUnit;
public abstract class TrackerClient implements TrackerConnector {
private final boolean secure;
private final long interval;
private final Bootstrap bootstrap;
private final int port;
private final String address;
private final String[] devices;
private final ChannelGroup channelGroup = new DefaultChannelGroup(GlobalEventExecutor.INSTANCE);
@Override
public boolean isDatagram() {
return false;
}
@Override
public boolean isSecure() {
return secure;
}
public TrackerClient(String protocol) {
secure = Context.getConfig().getBoolean(Keys.PROTOCOL_SSL.withPrefix(protocol));
interval = Context.getConfig().getLong(Keys.PROTOCOL_INTERVAL.withPrefix(protocol));
address = Context.getConfig().getString(Keys.PROTOCOL_ADDRESS.withPrefix(protocol));
port = Context.getConfig().getInteger(Keys.PROTOCOL_PORT.withPrefix(protocol), secure ? 443 : 80);
devices = Context.getConfig().getString(Keys.PROTOCOL_DEVICES.withPrefix(protocol)).split("[, ]");
BasePipelineFactory pipelineFactory = new BasePipelineFactory(this, protocol) {
@Override
protected void addTransportHandlers(PipelineBuilder pipeline) {
try {
if (isSecure()) {
SSLEngine engine = SSLContext.getDefault().createSSLEngine();
engine.setUseClientMode(true);
pipeline.addLast(new SslHandler(engine));
}
} catch (Exception e) {
throw new RuntimeException(e);
}
}
@Override
protected void addProtocolHandlers(PipelineBuilder pipeline) {
try {
TrackerClient.this.addProtocolHandlers(pipeline, Context.getConfig());
} catch (Exception e) {
throw new RuntimeException(e);
}
}
};
bootstrap = new Bootstrap()
.group(EventLoopGroupFactory.getWorkerGroup())
.channel(NioSocketChannel.class)
.handler(pipelineFactory);
}
protected abstract void addProtocolHandlers(PipelineBuilder pipeline, Config config) throws Exception;
public String[] getDevices() {
return devices;
}
@Override
public ChannelGroup getChannelGroup() {
return channelGroup;
}
@Override
public void start() throws Exception {
bootstrap.connect(address, port)
.syncUninterruptibly().channel().closeFuture().addListener(new GenericFutureListener<>() {
@Override
public void operationComplete(Future<? super Void> future) {
if (interval > 0) {
GlobalEventExecutor.INSTANCE.schedule(() -> {
bootstrap.connect(address, port)
.syncUninterruptibly().channel().closeFuture().addListener(this);
}, interval, TimeUnit.SECONDS);
}
}
});
}
@Override
public void stop() {
channelGroup.close().awaitUninterruptibly();
}
}
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