| line | stmt | bran | cond | sub | pod | time | code | 
| 1 |  |  |  |  |  |  | package EntityModel::Transaction; | 
| 2 |  |  |  |  |  |  | { | 
| 3 |  |  |  |  |  |  | $EntityModel::Transaction::VERSION = '0.102'; | 
| 4 |  |  |  |  |  |  | } | 
| 5 | 17 |  |  | 17 |  | 14337 | use EntityModel::Class; | 
|  | 17 |  |  |  |  | 44 |  | 
|  | 17 |  |  |  |  | 128 |  | 
| 6 |  |  |  |  |  |  | use overload '&{}' => sub { | 
| 7 | 4 |  |  | 4 |  | 3589 | my $self = shift; | 
| 8 | 4 |  |  |  |  | 14 | sap($self, 'apply'); | 
| 9 | 17 |  |  | 17 |  | 6955 | }, fallback => 1; | 
|  | 17 |  |  |  |  | 37 |  | 
|  | 17 |  |  |  |  | 209 |  | 
| 10 | 17 |  |  | 17 |  | 14742 | use Try::Tiny; | 
|  | 17 |  |  |  |  | 39831 |  | 
|  | 17 |  |  |  |  | 11231 |  | 
| 11 |  |  |  |  |  |  |  | 
| 12 |  |  |  |  |  |  | =head1 NAME | 
| 13 |  |  |  |  |  |  |  | 
| 14 |  |  |  |  |  |  | EntityModel::Transaction - transaction co-ordinator | 
| 15 |  |  |  |  |  |  |  | 
| 16 |  |  |  |  |  |  | =head1 VERSION | 
| 17 |  |  |  |  |  |  |  | 
| 18 |  |  |  |  |  |  | version 0.102 | 
| 19 |  |  |  |  |  |  |  | 
| 20 |  |  |  |  |  |  | =head1 SYNOPSIS | 
| 21 |  |  |  |  |  |  |  | 
| 22 |  |  |  |  |  |  | See L. | 
| 23 |  |  |  |  |  |  |  | 
| 24 |  |  |  |  |  |  | =head1 DESCRIPTION | 
| 25 |  |  |  |  |  |  |  | 
| 26 |  |  |  |  |  |  | Contacts each L instance and requests that they join a new | 
| 27 |  |  |  |  |  |  | transaction. | 
| 28 |  |  |  |  |  |  |  | 
| 29 |  |  |  |  |  |  | See L. | 
| 30 |  |  |  |  |  |  |  | 
| 31 |  |  |  |  |  |  | =head2 apply | 
| 32 |  |  |  |  |  |  |  | 
| 33 |  |  |  |  |  |  | Applies the current transaction. Typically called as the last | 
| 34 |  |  |  |  |  |  | step in the transaction codeblock. The &{} overload will call | 
| 35 |  |  |  |  |  |  | this method (so you can use C< $tran->() > or C< $tran->apply > | 
| 36 |  |  |  |  |  |  | interchangeably). | 
| 37 |  |  |  |  |  |  |  | 
| 38 |  |  |  |  |  |  | Takes no parameters. | 
| 39 |  |  |  |  |  |  |  | 
| 40 |  |  |  |  |  |  | Returns $self. | 
| 41 |  |  |  |  |  |  |  | 
| 42 |  |  |  |  |  |  | =cut | 
| 43 |  |  |  |  |  |  |  | 
| 44 |  |  |  |  |  |  | sub apply { | 
| 45 | 4 |  |  | 4 | 1 | 7 | my $self = shift; | 
| 46 |  |  |  |  |  |  |  | 
| 47 | 4 | 100 |  |  |  | 19 | return $self if $self->{rolled_back}; | 
| 48 |  |  |  |  |  |  | return $self unless try { | 
| 49 |  |  |  |  |  |  | # commit | 
| 50 | 3 |  |  | 3 |  | 116 | 1; | 
| 51 |  |  |  |  |  |  | } catch { | 
| 52 | 0 |  |  | 0 |  | 0 | $self->mark_failure; | 
| 53 | 0 |  |  |  |  | 0 | $self->mark_goodbye; | 
| 54 | 0 |  |  |  |  | 0 | 0 | 
| 55 | 3 | 50 |  |  |  | 22 | }; | 
| 56 | 3 |  |  |  |  | 60 | $self->mark_success; | 
| 57 | 3 |  |  |  |  | 9 | $self->mark_goodbye; | 
| 58 | 3 |  |  |  |  | 12 | $self; | 
| 59 |  |  |  |  |  |  | } | 
| 60 |  |  |  |  |  |  |  | 
| 61 |  |  |  |  |  |  | =head2 mark_failure | 
| 62 |  |  |  |  |  |  |  | 
| 63 |  |  |  |  |  |  | Mark this transaction as failed, applying rollback if required, and | 
| 64 |  |  |  |  |  |  | calls the failure coderef. | 
| 65 |  |  |  |  |  |  |  | 
| 66 |  |  |  |  |  |  | Takes no parameters. | 
| 67 |  |  |  |  |  |  |  | 
| 68 |  |  |  |  |  |  | Returns $self. | 
| 69 |  |  |  |  |  |  |  | 
| 70 |  |  |  |  |  |  | =cut | 
| 71 |  |  |  |  |  |  |  | 
| 72 |  |  |  |  |  |  | sub mark_failure { | 
| 73 | 2 |  |  | 2 | 1 | 5 | my $self = shift; | 
| 74 |  |  |  |  |  |  | # rollback here | 
| 75 | 2 |  |  |  |  | 6 | $self->{rolled_back} = 1; | 
| 76 | 2 | 50 |  |  |  | 13 | $self->{on_failure}->($self) if exists $self->{on_failure}; | 
| 77 | 2 |  |  |  |  | 824 | $self | 
| 78 |  |  |  |  |  |  | } | 
| 79 |  |  |  |  |  |  |  | 
| 80 |  |  |  |  |  |  | =head2 mark_success | 
| 81 |  |  |  |  |  |  |  | 
| 82 |  |  |  |  |  |  | Mark this transaction as successful, committing if required, and | 
| 83 |  |  |  |  |  |  | calls the success coderef. | 
| 84 |  |  |  |  |  |  |  | 
| 85 |  |  |  |  |  |  | Takes no parameters. | 
| 86 |  |  |  |  |  |  |  | 
| 87 |  |  |  |  |  |  | Returns $self. | 
| 88 |  |  |  |  |  |  |  | 
| 89 |  |  |  |  |  |  | =cut | 
| 90 |  |  |  |  |  |  |  | 
| 91 |  |  |  |  |  |  | sub mark_success { | 
| 92 | 3 |  |  | 3 | 1 | 7 | my $self = shift; | 
| 93 | 3 | 100 |  |  |  | 19 | $self->{on_success}->($self) if exists $self->{on_success}; | 
| 94 | 3 |  |  |  |  | 670 | $self | 
| 95 |  |  |  |  |  |  | } | 
| 96 |  |  |  |  |  |  |  | 
| 97 |  |  |  |  |  |  | =head2 mark_goodbye | 
| 98 |  |  |  |  |  |  |  | 
| 99 |  |  |  |  |  |  | Mark this transaction as completed. Calls the C coderef | 
| 100 |  |  |  |  |  |  | if available. | 
| 101 |  |  |  |  |  |  |  | 
| 102 |  |  |  |  |  |  | Takes no parameters. | 
| 103 |  |  |  |  |  |  |  | 
| 104 |  |  |  |  |  |  | Returns $self. | 
| 105 |  |  |  |  |  |  |  | 
| 106 |  |  |  |  |  |  | =cut | 
| 107 |  |  |  |  |  |  |  | 
| 108 |  |  |  |  |  |  | sub mark_goodbye { | 
| 109 | 5 |  |  | 5 | 1 | 8 | my $self = shift; | 
| 110 | 5 | 100 |  |  |  | 40 | $self->{on_goodbye}->($self) if exists $self->{on_goodbye}; | 
| 111 | 5 |  |  |  |  | 1751 | $self | 
| 112 |  |  |  |  |  |  | } | 
| 113 |  |  |  |  |  |  |  | 
| 114 |  |  |  |  |  |  | =head2 run | 
| 115 |  |  |  |  |  |  |  | 
| 116 |  |  |  |  |  |  | Takes the following (named) parameters: | 
| 117 |  |  |  |  |  |  |  | 
| 118 |  |  |  |  |  |  | =over 4 | 
| 119 |  |  |  |  |  |  |  | 
| 120 |  |  |  |  |  |  | =item * | 
| 121 |  |  |  |  |  |  |  | 
| 122 |  |  |  |  |  |  | =back | 
| 123 |  |  |  |  |  |  |  | 
| 124 |  |  |  |  |  |  | Returns $self. | 
| 125 |  |  |  |  |  |  |  | 
| 126 |  |  |  |  |  |  | =cut | 
| 127 |  |  |  |  |  |  |  | 
| 128 |  |  |  |  |  |  | sub run { | 
| 129 | 5 |  |  | 5 | 1 | 10 | my $self = shift; | 
| 130 | 5 |  |  |  |  | 6 | my $code = shift; | 
| 131 | 5 |  |  |  |  | 14 | my %args = @_; | 
| 132 | 5 |  |  |  |  | 124 | $self->{"on_$_"} = delete $args{$_} for grep exists $args{$_}, qw(success failure goodbye); | 
| 133 |  |  |  |  |  |  | # Attempt the transaction bit, normally we'd expect | 
| 134 |  |  |  |  |  |  | # this to set up a few deferred events and return | 
| 135 |  |  |  |  |  |  | # quickly | 
| 136 |  |  |  |  |  |  | return $self unless try { | 
| 137 | 5 |  |  | 5 |  | 202 | sap($self, $code)->(); | 
| 138 | 3 |  |  |  |  | 443 | 1; | 
| 139 |  |  |  |  |  |  | } catch { | 
| 140 |  |  |  |  |  |  | # Something went wrong, bail | 
| 141 | 2 |  |  | 2 |  | 952 | $self->mark_failure; | 
| 142 | 2 |  |  |  |  | 9 | $self->mark_goodbye; | 
| 143 | 2 |  |  |  |  | 14 | 0; | 
| 144 | 5 | 100 |  |  |  | 42 | }; | 
| 145 | 3 |  |  |  |  | 57 | $self; | 
| 146 |  |  |  |  |  |  | } | 
| 147 |  |  |  |  |  |  |  | 
| 148 |  |  |  |  |  |  | sub commit { | 
| 149 | 5 |  |  | 5 | 0 | 431 | my $self = shift; | 
| 150 | 5 | 100 |  |  |  | 27 | return $self if $self->{rolled_back}; | 
| 151 | 3 |  |  |  |  | 7 | $self->{committed} = 1; | 
| 152 | 3 |  |  |  |  | 10 | $self | 
| 153 |  |  |  |  |  |  | } | 
| 154 |  |  |  |  |  |  |  | 
| 155 |  |  |  |  |  |  | sub DESTROY { | 
| 156 | 5 |  |  | 5 |  | 1291 | my $self = shift; | 
| 157 | 5 | 50 | 66 |  |  | 66 | warn "did not finish" unless $self->{committed} || $self->{rolled_back}; | 
| 158 |  |  |  |  |  |  | } | 
| 159 |  |  |  |  |  |  |  | 
| 160 |  |  |  |  |  |  | sub sap { | 
| 161 | 9 |  |  | 9 | 1 | 30 | my ($self, $sub) = @_; | 
| 162 | 9 |  |  |  |  | 29 | Scalar::Util::weaken $self; | 
| 163 |  |  |  |  |  |  | return sub { | 
| 164 | 9 |  |  | 9 |  | 29 | $self->$sub(@_); | 
| 165 | 9 |  |  |  |  | 54 | }; | 
| 166 |  |  |  |  |  |  | } | 
| 167 |  |  |  |  |  |  |  | 
| 168 |  |  |  |  |  |  | 1; | 
| 169 |  |  |  |  |  |  |  | 
| 170 |  |  |  |  |  |  | __END__ |