[central system] Add websocket ping interval configuration

Author: c-jimenez

examples/common/config/CentralSystemConfig.h

@@ -51,6 +51,8 @@ class CentralSystemConfig : public ocpp::config::ICentralSystemConfig
     std::string listenUrl() const override { return getString("ListenUrl"); }
     /** @brief Call request timeout */
     std::chrono::milliseconds callRequestTimeout() const override { return get<std::chrono::milliseconds>("CallRequestTimeout"); }
+    /** @brief Websocket PING interval */
+    std::chrono::seconds webSocketPingInterval() const override { return get<std::chrono::seconds>("WebSocketPingInterval"); }
     /** @brief Boot notification retry interval */
     std::chrono::seconds bootNotificationRetryInterval() const override
     {

examples/quick_start_centralsystem/config/quick_start_centralsystem.ini

@@ -3,6 +3,7 @@ DatabasePath=./quick_start_centralsystem.db
 JsonSchemasPath=../../schemas/ocpp16/
 ListenUrl=ws://127.0.0.1:8180/steve/websocket/CentralSystemService/
 CallRequestTimeout=2000
+WebSocketPingInterval=30
 BootNotificationRetryInterval=30
 HeartbeatInterval=3600
 HttpBasicAuthent=false

src/centralsystem/CentralSystem.cpp

@@ -171,7 +171,7 @@ bool CentralSystem::start()
         credentials.client_certificate_authent                = m_stack_config.tlsClientCertificateAuthent();
 
         // Start listening
-        ret = m_rpc_server->start(m_stack_config.listenUrl(), credentials);
+        ret = m_rpc_server->start(m_stack_config.listenUrl(), credentials, m_stack_config.webSocketPingInterval());
     }
     else
     {

src/centralsystem/interface/ICentralSystemConfig.h

@@ -47,6 +47,8 @@ class ICentralSystemConfig
     virtual std::string listenUrl() const = 0;
     /** @brief Call request timeout */
     virtual std::chrono::milliseconds callRequestTimeout() const = 0;
+    /** @brief Websocket PING interval */
+    virtual std::chrono::seconds webSocketPingInterval() const = 0;
     /** @brief Boot notification retry interval */
     virtual std::chrono::seconds bootNotificationRetryInterval() const = 0;
     /** @brief Heartbeat interval */