Mercurial > pub > Impl

annotate lib/IMPL/Config/ActivationContext.pm @ 427:09e0086a82a7 ref20150831 tip

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Merge
author cin
date Tue, 15 May 2018 00:51:33 +0300
parents b0481c071bea
children
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1 package IMPL::Config::ActivationContext;
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2
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3 use IMPL::lang qw(:base);
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4 use IMPL::Exception();
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5 use IMPL::declare {
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6 require => {
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7 Bag => 'IMPL::Config::Bag',
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8 ServiceNotFoundException => 'IMPL::Config::ServiceNotFoundException',
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9 Descriptor => '-IMPL::Config::Descriptor'
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10 },
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11 base => {
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12 'IMPL::Object' => '@_'
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13 },
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14 props => [
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15 container => 'rw',
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16 owner => 'rw',
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17 instances => 'rw',
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18 name => 'rw',
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19 _services => 'rw',
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20 _stack => 'rw'
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21 ]
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22 };
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23
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24 sub CTOR {
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25 my ( $this, $container ) = @_;
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26
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27 $this->container($container)
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28 or die IMPL::InvalidArgumentException->new('container');
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29 $this->owner($container);
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30 $this->_services( $container->services );
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31 $this->instances( {} );
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32 $this->_stack( [] );
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33 }
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34
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35 sub EnterScope {
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36 my ( $this, $name, $services, $container ) = @_;
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37
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38 my $info = { name => $this->name };
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39
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40 $this->name($name);
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41
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42 if ( $container && $this->container != $container ) {
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43 $info->{container} = $this->container;
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44 $this->container($container);
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45 }
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46
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47 if ($services) {
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48 die IMPL::InvalidArgumentException->new(
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49 services => 'An array is required' )
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50 unless isarray($services);
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51
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52 my $bag = $this->container->serviceCache->{ ref($services) };
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53
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54 unless ($bag) {
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55 $bag = Bag->new( $this->_services );
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56 $bag->tag( $container || $this->container );
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57
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58 $bag->Register( $container->GetLinearRoleHash( $_->{role} ),
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59 $_->{descriptor} )
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60 foreach @$services;
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61
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62 $container->serviceCache->{ ref($services) } = $bag;
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63 }
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64
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65 $info->{services} = $this->_services;
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66 $this->_services($bag);
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67 }
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68
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69 push @{ $this->_stack }, $info;
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70 }
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71
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72 sub LeaveScope {
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73 my ($this) = @_;
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74
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75 my $info = pop @{ $this->_stack }
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76 or die IMPL::InvalidOperationException->new();
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77
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78 $this->name( $info->{name} );
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79 $this->_services( $info->{services} ) if $info->{services};
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80 $this->conatiner( $info->{container} ) if $info->{container};
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81 }
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82
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83 sub Resolve {
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84 my ( $this, $role, %opts ) = @_;
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85
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86 #change of the container may occur only due resolution of the dependency
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87 my ( $d, $bag ) = $this->_services->Resolve($role);
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88
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89 unless ($d) {
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90 die ServiceNotFoundException->new(serviceName => $role) unless $opts{optional};
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91 return $opts{default};
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92 }
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93 else {
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94 $this->EnterScope( $d->GetName(), $d->services(), $bag->tag() );
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95 my $instance = $d->Activate($this);
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96 $this->LeaveScope();
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97 return $instance;
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98 }
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99 }
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100
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101 sub Activate {
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102 my ( $this, $d ) = @_;
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103 $this->EnterScope( $d->GetName(), $d->services() );
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104 my $instance = $d->Activate($this);
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105 $this->LeaveScope();
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106 return $instance;
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107 }
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108
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109 sub Clone {
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110 my ($this) = @_;
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111
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112 my $clone = SELF->new( $this->owner );
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113 $clone->name($this->name);
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114 $clone->container( $this->container );
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115 $clone->_services( $this->_services );
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116 $clone->instances( $this->instances );
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117 $clone->_stack( [ @{ $this->_stack } ] );
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118
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119 return $clone;
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120 }
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121
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122 1;
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123 __END__
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124
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125 =pod
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126
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127 =head1 NAME
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128
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129 C<IMPL::Config::ActivationContext> - an activation context for the service
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130
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131 =head1 SYNOPSIS
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132
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133 For the internal use only
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134
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135 =head1 MEMBERS
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136
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137 =head2 PROPERTIES
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138
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139 =head3 [get] container
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140
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141 Current container for the activation context, this container changes
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142 during resolution process to match the one in which the resulting
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143 descriptor were defined. Descriptors can use this property to
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144 access the cache of theirs container.
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145
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146 =head3 [get] owner
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147
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148 The container which created this context. Descriptors can use this
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149 property during theirs activation.
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150
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151 =head3 [get] instances
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152
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153 The activation cache which can be used to store instances during
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154 single resolution process.
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155
407
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156 =head2 METHODS
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157
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158 =head3 Resolve($serviceId): $instance
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159
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160 Activates and returns an instance specified by C<$serviceId>
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161
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162 =head3 Activate($descriptor): $instance
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163
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164 Activates and returns an instance of the services for the specified descriptor/
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165
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166 =cut