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При каждом запуске алгоритма, информация о процессе сохраняется менеджером истории. Записываются как используемые параметры, так и дата и время выполнения алгоритма.

This way, it is easy to track and control all the work that has been developed using the processing framework, and easily reproduce it.

The history manager is a set of registry entries grouped according to their date of execution, making it easier to find information about an algorithm executed at any particular moment.

Figure Processing 30:


Журнал win

Информация о процессе сохраняется в виде выражения командной строки, даже если алгоритм был запущен из панели инструментов. Это делает менеджер истории полезным также при изучении возможностей командной строки SEXTANTE, т.к. можно запустить алгоритм из панели инструментов, а затем посмотреть в менеджере истории как его вызывать из командной строки.

Apart from browsing the entries in the registry, you can also re-execute processes by simply double-clicking on the corresponding entry.

Along with recording algorithm executions, the processing framework communicates with the user by means of the other groups of the registry, namely Errors, Warnings and Information. In case something is not working properly, having a look at the Errors might help you to see what is happening. If you get in contact with a developer to report a bug or error, the information in that group will be very useful for her or him to find out what is going wrong.

Third-party algorithms are usually executed by calling their command-line interfaces, which communicate with the user via the console. Although that console is not shown, a full dump of it is stored in the Information group each time you run one of those algorithms. If, for instance, you are having problems executing a SAGA algorithm, look for an entry named ‘SAGA execution console output’ to check all the messages generated by SAGA and try to find out where the problem is.

Some algorithms, even if they can produce a result with the given input data, might add comments or additional information to the Warning block if they detect potential problems with the data, in order to warn you. Make sure you check those messages if you are having unexpected results.