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1 | use strict; |
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2 | use warnings FATAL => 'all'; |
3 | |
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4 | use Test::More; |
5 | |
6 | plan skip_all => "Skipping the optimize tests on Win32/cygwin for now." |
7 | if ( $^O eq 'MSWin32' || $^O eq 'cygwin' ); |
8 | |
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9 | use t::common qw( new_fh ); |
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10 | |
11 | use_ok( 'DBM::Deep' ); |
12 | |
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13 | my ($fh, $filename) = new_fh(); |
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14 | my $db = DBM::Deep->new( |
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15 | file => $filename, |
16 | autoflush => 1, |
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17 | ); |
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18 | |
19 | ## |
20 | # create some unused space |
21 | ## |
22 | $db->{key1} = "value1"; |
23 | $db->{key2} = "value2"; |
24 | |
25 | $db->{a} = {}; |
26 | $db->{a}{b} = []; |
27 | $db->{a}{c} = 'value2'; |
28 | |
29 | my $b = $db->{a}->{b}; |
30 | $b->[0] = 1; |
31 | $b->[1] = 2; |
32 | $b->[2] = {}; |
33 | $b->[2]->{c} = []; |
34 | |
35 | my $c = $b->[2]->{c}; |
36 | $c->[0] = 'd'; |
37 | $c->[1] = {}; |
38 | $c->[1]->{e} = 'f'; |
39 | |
40 | undef $c; |
41 | undef $b; |
42 | |
43 | delete $db->{key2}; |
44 | delete $db->{a}{b}; |
45 | |
46 | ## |
47 | # take byte count readings before, and after optimize |
48 | ## |
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49 | my $before = (stat($filename))[7]; |
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50 | my $result = $db->optimize(); |
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51 | my $after = (stat($filename))[7]; |
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52 | |
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53 | ok( $result, "optimize succeeded" ); |
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54 | cmp_ok( $after, '<', $before, "file size has shrunk" ); # make sure file shrunk |
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55 | |
56 | is( $db->{key1}, 'value1', "key1's value is still there after optimize" ); |
57 | is( $db->{a}{c}, 'value2', "key2's value is still there after optimize" ); |
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58 | |
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59 | $db->_get_self->_engine->storage->close( $db->_get_self ); |
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60 | |
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61 | ## |
62 | # now for the tricky one -- try to store a new key while file is being |
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63 | # optimized and locked by another process. filehandle should be invalidated, |
64 | # and automatically re-opened transparently. Cannot test on Win32, due to |
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65 | # problems with fork()ing, flock()ing, etc. Win32 very bad. |
66 | ## |
67 | |
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68 | SKIP: { |
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69 | skip "Fork tests skipped until fh/filename question solved.", 4; |
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70 | skip "Fork tests skipped on Win32", 4 |
71 | if $^O eq 'MSWin32' || $^O eq 'cygwin'; |
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72 | |
73 | ## |
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74 | # first things first, get us about 1000 keys so the optimize() will take |
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75 | # at least a few seconds on any machine, and re-open db with locking |
76 | ## |
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77 | for (1..1000) { $db->STORE( $_, $_ +1 ); } |
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78 | undef $db; |
79 | |
80 | ## |
81 | # now, fork a process for the optimize() |
82 | ## |
83 | my $pid = fork(); |
84 | |
85 | unless ( $pid ) { |
86 | # child fork |
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87 | |
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88 | # re-open db |
89 | $db = DBM::Deep->new( |
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90 | file => $filename, |
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91 | autoflush => 1, |
92 | locking => 1 |
93 | ); |
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94 | |
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95 | # optimize and exit |
96 | $db->optimize(); |
97 | |
98 | exit( 0 ); |
99 | } |
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100 | # parent fork |
101 | ok( defined($pid), "fork was successful" ); # make sure fork was successful |
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102 | |
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103 | # re-open db |
104 | $db = DBM::Deep->new( |
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105 | file => $filename, |
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106 | autoflush => 1, |
107 | locking => 1 |
108 | ); |
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109 | |
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110 | # sleep for 1 second to make sure optimize() is running in the other fork |
111 | sleep(1); |
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112 | |
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113 | # now, try to get a lock and store a key |
114 | $db->{parentfork} = "hello"; |
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115 | |
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116 | # see if it was stored successfully |
117 | is( $db->{parentfork}, "hello", "stored key while optimize took place" ); |
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118 | |
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119 | undef $db; |
120 | $db = DBM::Deep->new( |
121 | file => $filename, |
122 | autoflush => 1, |
123 | locking => 1 |
124 | ); |
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125 | |
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126 | # now check some existing values from before |
127 | is( $db->{key1}, 'value1', "key1's value is still there after optimize" ); |
128 | is( $db->{a}{c}, 'value2', "key2's value is still there after optimize" ); |
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129 | } |
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130 | |
131 | done_testing; |