1Padre::Autosave(3)    User Contributed Perl Documentation   Padre::Autosave(3)
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NAME

6       Padre::Autosave - auto-save and recovery mechanism for Padre
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SYNOPSIS

9         my $autosave = Padre:Autosave->new( db => 'path/to/database' );
10         $autosave->save_file( $path, $type, $data, $timestamp ) = @_;
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DESCRIPTION

The longer auto-save plan
14       The following is just a plan that is currently shelved as some people
15       on the Padre development list think this is not necessary and one
16       should use a real version control for this anyway.
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18       So I leave it here for now, for future exploration.
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20       I'd like to provide auto-save with some history and recovery service.
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22       While I am writing this for Padre I'll make the code separate so others
23       can use it.
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25       An SQLite database will be used for this but theoretically any database
26       could be used. Event plain file system.
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28       Basically this will provide a versioned file system with metadata and
29       automatic cleanup.
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31       Besides the content of the file we need to save some meta data:
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33       path to the file will be the unique identifier
34       timestamp
35       type of save (initial, auto-save, user initiated save, external)
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37       When opening a file for the first time it is saved in the
38       database.(initial)
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40       Every N seconds files that are not currently in "saved" situation are
41       auto-saved in the database making sure that they are only saved if they
42       differ from the previous state. (auto-save)
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44       Evey time a file is saved it is also saved to the database. (user
45       initiated save) Before reloading a file we auto-save it. (auto-save)
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47       Every time we notice that a file was changed on the disk if the user
48       decides to overwrite it we also save the (external) changed file.
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50       Before auto-saving a file we make sure it has not changed since the
51       last auto-save.
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53       In order to make sure the database does not get too big we setup a
54       cleaning mechanism that is executed once in a while.  There might be
55       several options but for now: 1) Every entry older than N days will be
56       deleted.
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58       Based on the database we'll be able to provide the user recovery in
59       case of crash or accidental overwrite.
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61       When opening padre we should check if there are files in the database
62       that the last save was not a user initiated save and offer recovery.
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64       When opening a file we should also check how is it related to the last
65       save in the database.
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67       For buffers that were never saved and so have no file names we should
68       have some internal identifier in Padre and use that for the auto-save
69       till the first user initiated save.
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71       The same mechanism will be really useful when we start providing remote
72       editing. Then a file is identified by its URI (
73       ftp://machine/path/to/file or scp://machine/path/to/file )
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75         my @types = qw(initial, autosave, usersave, external);
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77         sub save_data {
78             my ($path, $timestamp, $type, $data) = @_;
79         }
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83perl v5.28.1                      2011-08-16                Padre::Autosave(3)



        

    


            
        

        

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