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/*
* Copyright 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.forward;
import java.net.URI;
import java.net.URISyntaxException;
import java.util.UUID;
import java.util.function.BiConsumer;
import com.hivemq.client.mqtt.datatypes.MqttQos;
import com.hivemq.client.mqtt.mqtt5.Mqtt5AsyncClient;
import com.hivemq.client.mqtt.mqtt5.Mqtt5Client;
import com.hivemq.client.mqtt.mqtt5.Mqtt5ClientBuilder;
import com.hivemq.client.mqtt.mqtt5.message.auth.Mqtt5SimpleAuth;
import com.hivemq.client.mqtt.mqtt5.message.publish.Mqtt5PublishResult;
public class MqttClient {
private final Mqtt5AsyncClient client;
MqttClient(String url) {
URI uri;
try {
uri = new URI(url);
} catch (URISyntaxException e) {
throw new RuntimeException(e);
}
Mqtt5SimpleAuth simpleAuth = this.getSimpleAuth(uri);
String host = uri.getHost();
int port = uri.getPort();
Mqtt5ClientBuilder builder = Mqtt5Client.builder().identifier("traccar-" + UUID.randomUUID())
.serverHost(host).serverPort(port).simpleAuth(simpleAuth).automaticReconnectWithDefaultConfig();
client = builder.buildAsync();
client.connectWith().send().whenComplete((message, e) -> {
throw new RuntimeException(e);
});
}
private Mqtt5SimpleAuth getSimpleAuth(URI uri) {
String userInfo = uri.getUserInfo();
Mqtt5SimpleAuth simpleAuth = null;
if (userInfo != null) {
int delimiter = userInfo.indexOf(':');
if (delimiter == -1) {
throw new IllegalArgumentException("Wrong MQTT credentials. Should be in format \"username:password\"");
} else {
simpleAuth = Mqtt5SimpleAuth.builder().username(userInfo.substring(0, delimiter++))
.password(userInfo.substring(delimiter).getBytes()).build();
}
}
return simpleAuth;
}
public void publish(
String pubTopic, String payload, BiConsumer<? super Mqtt5PublishResult, ? super Throwable> whenComplete) {
client.publishWith().topic(pubTopic).qos(MqttQos.AT_LEAST_ONCE).payload(payload.getBytes()).send()
.whenComplete(whenComplete);
}
}
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