Getting Started with DECTPU 2.4 Using Journal Files

2.4.1 Keystroke Journaling

In keystroke journaling, DECTPU keeps track of each keystroke made during a session, regardless of which buffer is in use. If a system interruption occurs during a session, you can reconstruct the work done during the session.

To determine the name of the keystroke journal file, use a statement similar to the following:

filename := GET_INFO (SYSTEM, "journal_file");

For more information on using a keystroke journal file for recovery, see

Section 2.6.8 and the Extensible Versatile Editor Reference Manual.

Note

Compaq strongly recommends the use of buffer-change journaling rather than keystroke journaling.

To reconstruct your work, use the /JOURNAL and /RECOVER qualifiers. The following example shows system recovery on a file called JACKI.SDML:

$ EDIT/TPU JACKI.SDML /JOURNAL /RECOVER

2.4.2 Buffer-Change Journaling

Buffer-change journaling creates a separate journal file for each text buffer. The application can use the enhanced SET (JOURNALING) built-in to direct DECTPU to establish and maintain a separate journal file for any buffer or buffers created during the session. The application programmer or user can also use the SET (JOURNALING) built-in to turn journaling off or on for a given buffer during a session.

In the buffer’s journal file, DECTPU keeps track of the following record attributes (and any changes made to them):

•Left margin setting

•Modifiability or unmodifiability

•Display value

The journal file also tracks the following:

•Characters inserted in and deleted from a record (including the location where the change took place)

•Records inserted in and deleted from a buffer (including the location where the change took place)

To determine whether buffer-change journaling is turned on, use the following statement:

status := GET_INFO (buffer_name, "journaling");

For more information on record attributes and display values, see the descriptions of the SET (RECORD_ATTRIBUTE) and SET (DISPLAY_VALUE) built-in procedures in the DEC Text Processing Utility Reference Manual.

Buffer-change journaling does not keep a record of all keystrokes performed while editing a given buffer.

Getting Started with DECTPU 2–7

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Compaq AA-PWCBD-TE manual Buffer-Change Journaling, and the Extensible Versatile Editor Reference Manual
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