Changes between Version 6 and Version 7 of ariba_0_9

Timestamp:

Jun 19, 2013, 4:55:50 PM (11 years ago)

Author:

hock@…

Comment:

--

ariba_0_9

@@ -79 +79 @@
 Please note that the ping-pong example still uses the old deprecated ariba messages (see next section "Message formats" for more information).
 
+{{{
+#!cpp
+void PingPong::startup()
+{
+    using boost::property_tree::ptree;
+    using boost::property_tree::json_parser::read_json;
+    
+    logging_info( "[PINGPONG]\t starting up PingPong service ... " );
+
+    // read config
+    ptree config;
+    try
+    {
+        read_json(config_file, config);
+    }
+    catch ( exception& e )
+    {
+        logging_warn("ERROR: Failed to read config file »" << config_file << "«: ");
+        logging_warn(e.what());
+        logging_warn("---> Using fallback config.");
+        
+        config.put("ariba.spovnet_name", "pingpong");
+    }
+    
+    // use node name also in the application
+    name = config.get("ariba.node_name", "NO_NAME");
+    
+    // bind communication and node listener
+    node.bind( this );                              /*NodeListener*/
+    node.bind( this, PingPong::PINGPONG_SERVICEID); /*CommunicationListener*/
+
+    // connecting
+    logging_debug( "connecting ... " );
+
+    node.connect(config.get_child("ariba"));
+
+    // ping pong started up...
+    logging_info( "[PINGPONG]\t pingpong starting up with"
+                        << " [spovnetid " << node.getSpoVNetId().toString() << "]"
+                        << " and [nodeid " << node.getNodeId().toString() << "]" );
+}
+}}}
+
+  - `ptree config;` is an yet empty instance of boost::property_tree::ptree.
+  - `read_json(config_file, config);` reads a config file (like the JSON file showed in the previous section) into the ptree instance `config`. The path of the JSON file is stored in `config_file`.
+    - If the read fails, the except handler prints a warning and initiates a default config directly within the code via: `config.put("ariba.spovnet_name", "pingpong");`
+  - The node variable is defined as attribute: `ariba::Node node;` (initialized with the standard constructor). Thoe follwing registers the callbacks from ariba:
+    - `node.bind( this );`
+    - `node.bind( this, PingPong::PINGPONG_SERVICEID);`
+  - The following command starts ariba with the config stored in the ptree
+    - `node.connect(config.get_child("ariba"));`
+
+The callbacks (functions in the application that are called from ariba) are declared in `ariba/CommunicationListener.h`.
+The ariba interface (functions in ariba that can be called from the application) are declared in `ariba/Node.h`.
+
 === Message formats ===