From deb0c6cf01cb2b9994c77a6dd31341be8d1f1f4d Mon Sep 17 00:00:00 2001
From: Trygve Laugstøl <trygvis@inamo.no>
Date: Sun, 12 Jul 2015 19:57:52 +0200
Subject: o Adding command line options to configure cassandra and mqtt
 servers.

---
 CMakeLists.txt |  5 ++++-
 main.cpp       | 50 ++++++++++++++++++++++++++++++++++++++++----------
 2 files changed, 44 insertions(+), 11 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 878abf9..9c379c5 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,11 +1,14 @@
 cmake_minimum_required(VERSION 3.2)
 project(mqtt_cassandra_bridge)
 
-include(ExternalProject)
+find_package(Boost COMPONENTS regex system program_options REQUIRED)
 
 add_executable(mqtt_cassandra_bridge main.cpp)
+target_link_libraries(mqtt_cassandra_bridge PUBLIC ${Boost_LIBRARIES})
 target_compile_options(mqtt_cassandra_bridge PUBLIC "-std=c++14")
 
+include(ExternalProject)
+
 # Cassandra
 set(CPP_DRIVER ${CMAKE_CURRENT_BINARY_DIR}/cpp-driver)
 ExternalProject_Add(cpp-driver
diff --git a/main.cpp b/main.cpp
index 806c047..0cd5622 100644
--- a/main.cpp
+++ b/main.cpp
@@ -1,20 +1,19 @@
 #include "mosquittopp.h"
 #include "cassandra.h"
 #include "trygvis/sensor/io.h"
-#include <iostream>
-#include <chrono>
 #include <thread>
-#include <vector>
 #include <boost/lexical_cast.hpp>
+#include <boost/program_options.hpp>
 
 using namespace std;
 using namespace std::chrono;
 using namespace trygvis::sensor;
 using namespace trygvis::sensor::io;
 using namespace boost;
+namespace po = boost::program_options;
 
 static bool should_run;
-static auto mqtt_broker_host = "test.mosquitto.org";
+static string mqtt_broker_host;
 static auto mqtt_broker_port = 1883;
 static auto queue_name = "/trygvis";
 static string keyspace_name = "soil_moisture";
@@ -44,7 +43,7 @@ public:
                                                                                      on_message_(on_message_) {
         cout << "Connecting to " << mqtt_broker_host << ":" << mqtt_broker_port << endl;
         loop_start();
-        connect_async(mqtt_broker_host, mqtt_broker_port, 10);
+        connect_async(mqtt_broker_host.c_str(), mqtt_broker_port, 10);
     }
 
     ~mqtt_client() {
@@ -57,7 +56,7 @@ private:
     bool subscribed = false;
 
     void on_connect(int rc) override {
-        cout << "Connected to MQTT broker" << endl;
+        cout << "Connected to MQTT broker, rc=" << rc << endl;
 //        should_run = false;
         int qos = 0;
         if (!subscribed) {
@@ -69,7 +68,8 @@ private:
 
     void on_disconnect(int rc) override {
         subscribed = false;
-        cout << "Oops, disconnected" << endl;
+
+        cout << "Oops, disconnected, rc=" << rc << endl;
     }
 
     void on_publish(int mid) override {
@@ -280,15 +280,45 @@ void on_message(const struct mosquitto_message *message) {
     });
 }
 
-int main() {
+int main(int argc, const char **argv) {
     mqtt_lib mqtt_lib();
 
+    string cassandra_cluster;
+    po::options_description all("Options");
+    all.add_options()("cassandra-cluster", po::value<string>(&cassandra_cluster)->default_value("127.0.0.1"));
+    all.add_options()("mqtt-broker-host", po::value<string>(&mqtt_broker_host)->default_value("trygvis.io"));
+
+    po::variables_map vm;
+    try {
+        auto parsed = po::parse_command_line(argc, argv, all);
+        po::store(parsed, vm);
+        po::notify(vm);
+        auto unrecognized = po::collect_unrecognized(parsed.options, po::include_positional);
+
+        if (vm.count("help")) {
+            cerr << all << "\n";
+            return EXIT_FAILURE;
+        }
+
+        if (unrecognized.size()) {
+            cerr << "Unrecognized option: " << unrecognized.at(0) << "\n";
+            return EXIT_FAILURE;
+        }
+
+    } catch (po::required_option &e) {
+        cerr << "Missing required option: " << e.get_option_name() << endl;
+        cerr << all << endl;
+    } catch (po::unknown_option &e) {
+        cerr << e.what() << endl;
+        return EXIT_FAILURE;
+    }
+
     mqtt_client mqtt_client(on_message);
     CassFuture *connect_future = nullptr;
     CassCluster *cluster = cass_cluster_new();
     CassSession *session = cass_session_new();
 
-    cass_cluster_set_contact_points(cluster, "127.0.0.1"); // , 127.0.0.2, 127.0.0.3
+    cass_cluster_set_contact_points(cluster, cassandra_cluster.c_str());
 
     connect_future = cass_session_connect(session, cluster);
 
@@ -304,7 +334,7 @@ int main() {
     should_run = true;
     while (should_run) {
         cout << "sleeping.." << endl;
-        std::this_thread::sleep_for(10s);
+        std::this_thread::sleep_for(60s);
     }
 
     return 0;
-- 
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