allow specify how many times we can try to connect to the database

src/postgresqlconnector.h

@@ -104,17 +104,23 @@ public:
 	virtual void set_conn_param(const std::wstring & database_host, const std::wstring & database_hostaddr, const std::wstring & database_port,
 								const std::wstring & database, const std::wstring & user, const std::wstring & pass);
 
-
 	virtual void set_conn_param(const std::wstring & database, const std::wstring & user, const std::wstring & pass);
 
-	virtual void connect();
-	virtual void wait_for_connection();
-	virtual void close();
-	//virtual bool assert_connection(bool put_log = true, bool throw_if_no_connection = true);
-	virtual bool assert_connection(bool put_log = true);
-	virtual void set_db_parameters();
-	virtual void log_connection_socket();
 
+	/*
+	 * waiting for a valid connection to the database
+	 *
+	 * attempts_max - how many connection attempts are allowed (0 - infinite)
+	 * attempt_delay - delay between each attempt (in seconds)
+	 *
+	 */
+	virtual bool wait_for_connection(size_t attempts_max = 0, size_t attempt_delay = 5);
+
+
+	/*
+	 * close the connection with the database if it was open
+	 */
+	virtual void close();
 
 
 
@@ -132,6 +138,12 @@ protected:
 	std::wstring db_user;
 	std::wstring db_pass;
 
+	virtual void set_db_parameters();
+	virtual void log_no_connection(size_t attempts);
+	virtual void log_connection_socket();
+	virtual bool assert_connection_is_working(bool put_log = true);
+	virtual void connect();
+
 	virtual bool do_query(const char * query_str, PostgreSQLQueryResult * psql_result);
 	virtual void allocate_default_expression();
 	virtual void overwrite(pt::TextStream & stream);