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/*
* Copyright 2023 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.helper;
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.mqtt3.Mqtt3AsyncClient;
import com.hivemq.client.mqtt.mqtt3.Mqtt3Client;
import com.hivemq.client.mqtt.mqtt3.Mqtt3ClientBuilder;
import com.hivemq.client.mqtt.mqtt3.message.auth.Mqtt3SimpleAuth;
import com.hivemq.client.mqtt.mqtt3.message.publish.Mqtt3Publish;
public final class MqttUtil {
private MqttUtil() {
}
public static Mqtt3AsyncClient createClient(final String url) {
URI uri;
try {
uri = new URI(url);
} catch (URISyntaxException e) {
throw new RuntimeException(e);
}
final Mqtt3SimpleAuth simpleAuth = getSimpleAuth(uri);
final String host = uri.getHost();
final int port = uri.getPort();
final Mqtt3ClientBuilder builder = Mqtt3Client.builder().identifier("traccar-" + UUID.randomUUID())
.serverHost(host).serverPort(port).simpleAuth(simpleAuth).automaticReconnectWithDefaultConfig();
final Mqtt3AsyncClient client;
client = builder.buildAsync();
client.connectWith().send().whenComplete((message, e) -> {
throw new RuntimeException(e);
});
return client;
}
private static Mqtt3SimpleAuth getSimpleAuth(final URI uri) {
final String userInfo = uri.getUserInfo();
Mqtt3SimpleAuth 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 = Mqtt3SimpleAuth.builder().username(userInfo.substring(0, delimiter++))
.password(userInfo.substring(delimiter).getBytes()).build();
}
}
return simpleAuth;
}
public static void publish(final Mqtt3AsyncClient client, final String pubTopic, final String payload,
final BiConsumer<? super Mqtt3Publish, ? super Throwable> whenComplete) {
client.publishWith().topic(pubTopic).qos(MqttQos.AT_LEAST_ONCE).payload(payload.getBytes()).send()
.whenComplete(whenComplete);
}
}
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