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11
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12
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package Cache::SizeAwareMemoryCache; |
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14
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15
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1
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use strict; |
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1
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1
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use vars qw( @ISA ); |
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1
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1
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14
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use Cache::Cache; |
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1
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17
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1
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34
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use Cache::CacheSizer; |
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1
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23
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1
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1
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156
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use Cache::MemoryCache; |
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11
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1
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26
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20
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1
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1
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18
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use Cache::SizeAwareCache qw( $NO_MAX_SIZE ); |
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1
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9
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1
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18
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21
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22
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23
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@ISA = qw ( Cache::MemoryCache Cache::SizeAwareCache ); |
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25
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26
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my $DEFAULT_MAX_SIZE = $NO_MAX_SIZE; |
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28
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29
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sub Clear |
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30
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{ |
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31
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8
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8
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1
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97
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return Cache::MemoryCache::Clear( ); |
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32
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} |
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33
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34
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35
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sub Purge |
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36
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{ |
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37
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2
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2
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1
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38
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return Cache::MemoryCache::Purge( ); |
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38
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} |
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39
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40
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41
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sub Size |
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42
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{ |
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43
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7
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7
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1
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80
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return Cache::MemoryCache::Size( ); |
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44
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} |
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45
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46
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47
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sub new |
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48
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{ |
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49
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3
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3
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1
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1167
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my ( $self ) = _new( @_ ); |
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50
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3
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45
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$self->_complete_initialization( ); |
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51
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3
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46
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return $self; |
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52
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} |
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53
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54
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55
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sub get |
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56
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{ |
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57
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30
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30
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1
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293
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my ( $self, $p_key ) = @_; |
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58
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59
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30
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482
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$self->_get_cache_sizer( )->update_access_time( $p_key ); |
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60
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30
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618
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return $self->SUPER::get( $p_key ); |
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61
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} |
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62
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63
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64
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sub limit_size |
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65
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{ |
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66
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2
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2
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1
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20
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my ( $self, $p_new_size ) = @_; |
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67
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68
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2
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22
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$self->_get_cache_sizer( )->limit_size( $p_new_size ); |
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69
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} |
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70
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71
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72
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sub set |
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73
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{ |
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74
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32
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32
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1
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350
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my ( $self, $p_key, $p_data, $p_expires_in ) = @_; |
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75
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76
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32
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731
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$self->SUPER::set( $p_key, $p_data, $p_expires_in ); |
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77
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32
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466
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$self->_get_cache_sizer( )->limit_size( $self->get_max_size( ) ); |
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78
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} |
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79
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80
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81
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sub _new |
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82
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{ |
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83
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3
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3
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30
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my ( $proto, $p_options_hash_ref ) = @_; |
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84
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3
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66
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41
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my $class = ref( $proto ) || $proto; |
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85
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3
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76
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my $self = $class->SUPER::_new( $p_options_hash_ref ); |
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86
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3
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31
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$self->_initialize_cache_sizer( ); |
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87
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3
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31
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return $self; |
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88
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} |
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89
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90
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91
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sub _initialize_cache_sizer |
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92
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{ |
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93
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3
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3
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27
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my ( $self ) = @_; |
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94
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95
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3
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34
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my $max_size = $self->_read_option( 'max_size', $DEFAULT_MAX_SIZE ); |
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96
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3
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42
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$self->_set_cache_sizer( new Cache::CacheSizer( $self, $max_size ) ); |
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97
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} |
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98
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99
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100
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sub get_max_size |
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101
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{ |
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102
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32
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32
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0
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282
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my ( $self ) = @_; |
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103
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104
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32
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337
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return $self->_get_cache_sizer( )->get_max_size( ); |
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105
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} |
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106
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107
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108
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sub set_max_size |
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109
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{ |
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110
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1
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1
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0
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11
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my ( $self, $p_max_size ) = @_; |
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111
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112
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1
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11
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$self->_get_cache_sizer( )->set_max_size( $p_max_size ); |
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113
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} |
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114
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115
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116
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sub _get_cache_sizer |
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117
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{ |
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118
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97
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97
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973
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my ( $self ) = @_; |
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119
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120
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97
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1291
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return $self->{_Cache_Sizer}; |
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121
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} |
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122
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123
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124
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sub _set_cache_sizer |
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125
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{ |
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126
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3
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3
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26
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my ( $self, $p_cache_sizer ) = @_; |
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127
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128
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3
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33
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$self->{_Cache_Sizer} = $p_cache_sizer; |
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129
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} |
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130
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131
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132
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1; |
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133
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134
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135
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136
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__END__ |
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137
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138
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=pod |
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139
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140
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=head1 NAME |
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141
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142
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Cache::SizeAwareMemoryCache -- extends Cache::MemoryCache |
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143
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144
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=head1 DESCRIPTION |
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145
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146
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The SizeAwareMemoryCache class adds the ability to dynamically limit |
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147
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the size (in bytes) of a memory based cache. This class also |
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148
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implements the SizeAwareCache interface, providing the 'max_size' |
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149
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option and the 'limit_size( $size )' method. |
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150
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151
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=head1 SYNOPSIS |
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152
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153
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use Cache::SizeAwareMemoryCache; |
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154
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155
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my $cache = |
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156
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new Cache::SizeAwareMemoryCache( { 'namespace' => 'MyNamespace', |
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157
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'default_expires_in' => 600, |
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158
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'max_size' => 10000 } ); |
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159
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160
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=head1 METHODS |
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161
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162
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See Cache::Cache and Cache::SizeAwareCache for the API documentation. |
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163
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164
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=head1 OPTIONS |
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165
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166
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See Cache::Cache and Cache::SizeAwareCache for the standard options. |
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167
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168
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=head1 PROPERTIES |
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169
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170
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See Cache::Cache and Cache::SizeAwareCache for the default properties. |
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171
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172
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=head1 SEE ALSO |
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173
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174
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Cache::Cache, Cache::SizeAwareCache, Cache::MemoryCache |
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175
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176
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=head1 AUTHOR |
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177
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178
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Original author: DeWitt Clinton <dewitt@unto.net> |
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179
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180
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Last author: $Author: dclinton $ |
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181
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182
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Copyright (C) 2001-2003 DeWitt Clinton |
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183
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184
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=cut |
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185
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186
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