Category: Software

  • Versionable Object’s Serialization using MFC in non Document View applications

    Most existing applications operate with data that must be stored and loaded in different times and different locations. The data is stored in text or binary files with a well defined format. The Problem Initially, in the first version 1.0, an application operates with data structures that can be stored and loaded. But, next version (2.0) these data structures suffers changes. Some structure’s attributes are added and other could be removed. These things change files format and structure when a new file version is saved. Question: What happens when you are using an application version 2.0 and you are trying to load old files format (version 1.0)? Answer: Most cases should cause incompatibility troubles between the current new application and files in old format. This could throw exceptions and the application could have undefined behavior. That’s why the application must be written in order to be able to open both file versions. Solution In order to solve the compatibility issue exist many solutions, more or less professional. The recommended solution is the serialization. Application window []

  • Progress database operations

    Preliminary remarks Application path (Sun Solaris Unix OS): /myApp/myapp111a/ Database location: /myApp/db/test_db Usually, our workstations have Windows OS and we need to connect to Solaris Unix OS on SSH. That’s why we are using Putty application. User: root Password: xxxxxxxxxx []