1Lucy::Index::Snapshot(3U)ser Contributed Perl DocumentatiLouncy::Index::Snapshot(3)
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NAME

6       Lucy::Index::Snapshot - Point-in-time index file list.
7

SYNOPSIS

9           my $snapshot = Lucy::Index::Snapshot->new;
10           $snapshot->read_file( folder => $folder );    # load most recent snapshot
11           my $files = $snapshot->list;
12           print "$_\n" for @$files;
13

DESCRIPTION

15       A Snapshot is list of index files and folders.  Because index files,
16       once written, are never modified, a Snapshot defines a point-in-time
17       view of the data in an index.
18
19       IndexReader objects interpret the data associated with a single
20       Snapshot.
21

CONSTRUCTORS

23   new
24           my $snapshot = Lucy::Index::Snapshot->new;
25
26       Constructor.  Takes no arguments.
27

METHODS

29   list
30           my $arrayref = $snapshot->list();
31
32       Return an array of all entries.
33
34   num_entries
35           my $int = $snapshot->num_entries();
36
37       Return the number of entries (including directories).
38
39   add_entry
40           $snapshot->add_entry($entry);
41
42       Add a filepath to the snapshot.
43
44   delete_entry
45           my $bool = $snapshot->delete_entry($entry);
46
47       Delete a filepath from the snapshot.
48
49       Returns: true if the entry existed and was successfully deleted, false
50       otherwise.
51
52   read_file
53           my $result = $snapshot->read_file(
54               folder => $folder,  # required
55               path   => $path,    # default: undef
56           );
57
58       Decode a snapshot file and initialize the object to reflect its
59       contents.
60
61       •   folder - A Folder.
62
63       •   path - The location of the snapshot file.  If not supplied, the
64           most recent snapshot file in the base directory will be chosen.
65
66       Returns: the Snapshot object itself
67
68   write_file
69           $snapshot->write_file(
70               folder => $folder,  # required
71               path   => $path,    # default: undef
72           );
73
74       Write a snapshot file.  The caller must lock the index while this
75       operation takes place, and the operation will fail if the snapshot file
76       already exists.
77
78       •   folder - A Folder.
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80       •   path - The path of the file to write.  If undef, a file name will
81           be chosen which supersedes the latest snapshot file in the index
82           folder.
83
84   set_path
85           $snapshot->set_path($path);
86
87       Set the path to the file that the Snapshot object serves as a proxy
88       for.
89
90   get_path
91           my $string = $snapshot->get_path();
92
93       Get the path to the snapshot file.  Initially undef; updated by
94       read_file(), write_file(), and set_path().
95

INHERITANCE

97       Lucy::Index::Snapshot isa Clownfish::Obj.
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101perl v5.34.0                      2021-07-22          Lucy::Index::Snapshot(3)
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