1 files changed, 76 insertions, 0 deletions
diff --git a/src/main/java/org/traccar/forward/MqttClient.java b/src/main/java/org/traccar/forward/MqttClient.java
new file mode 100644
index 000000000..416a167ec
--- /dev/null
+++ b/src/main/java/org/traccar/forward/MqttClient.java
@@ -0,0 +1,76 @@
+/*
+ * 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);
+    }
+
+}