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authorScott Murray <scott.murray@konsulko.com>2019-04-22 21:38:18 -0400
committerScott Murray <scott.murray@konsulko.com>2019-04-22 22:42:06 -0400
commitb523b0c8cc37a989bfb84a5ebefe1ec1f2b0cbfb (patch)
tree482f3fee892fc0a0a327d256bd25134fb6996e15 /app/mqttclient.cpp
A simple telematics demo application for AGL. It reads vehicle and engine speed from the CAN low-level binding and publishes them via MQTT. Change-Id: Ib85904e87919053cad1215b3f53cee81db25c94a Signed-off-by: Scott Murray <scott.murray@konsulko.com>
Diffstat (limited to 'app/mqttclient.cpp')
-rw-r--r--app/mqttclient.cpp68
1 files changed, 68 insertions, 0 deletions
diff --git a/app/mqttclient.cpp b/app/mqttclient.cpp
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+/*
+ * Copyright (C) 2019 Konsulko Group
+ *
+ * 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.
+ */
+
+#include "mqttclient.h"
+#include <iostream>
+
+#undef DEBUG
+
+#ifdef DEBUG
+static void on_connect(struct mosquitto *mosq, void *obj, int rc)
+{
+ std::cerr << " MQTT Connected, rc = " << rc << std::endl;
+}
+
+static void on_disconnect(struct mosquitto *mosq, void *obj, int rc)
+{
+ std::cerr << " MQTT Disconnected, rc = " << rc << std::endl;
+}
+#endif
+
+MqttClient::MqttClient(const std::string &id, const std::string &host, const int port, const int keepalive, const std::string &username, const std::string &password)
+{
+ mosquitto_lib_init();
+ m_mosq = mosquitto_new(id.c_str(), true, NULL);
+
+#ifdef DEBUG
+ mosquitto_connect_callback_set(m_mosq, on_connect);
+ mosquitto_disconnect_callback_set(m_mosq, on_disconnect);
+#endif
+
+ if(username.length())
+ mosquitto_username_pw_set(m_mosq, username.c_str(), password.c_str());
+
+ if(mosquitto_connect_async(m_mosq, host.c_str(), port, keepalive)) {
+ std::cerr << __FUNCTION__ << ": Unable to connect to " << host << std::endl;
+ }
+
+ int loop = mosquitto_loop_start(m_mosq);
+ if(loop != MOSQ_ERR_SUCCESS){
+ std::cerr << __FUNCTION__ << ": Unable to start loop, error = " << loop << std::endl;
+ }
+}
+
+MqttClient::~MqttClient(void)
+{
+ mosquitto_disconnect(m_mosq);
+ mosquitto_loop_stop(m_mosq, true);
+ mosquitto_destroy(m_mosq);
+ mosquitto_lib_cleanup();
+}
+
+int MqttClient::publish(const std::string &topic, const std::string &msg, const int qos, const bool retain)
+{
+ return mosquitto_publish(m_mosq, NULL, topic.c_str(), msg.length(), msg.c_str(), qos, retain);
+}