1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
|
package UR::Namespace::Command::Define::Datasource::Rdbms;
use strict;
use warnings;
use UR;
our $VERSION = "0.47"; # UR $VERSION;
use IO::File;
UR::Object::Type->define(
class_name => __PACKAGE__,
is => 'UR::Namespace::Command::Define::Datasource',
has => [
server => {
is => 'String',
doc => '"server" attribute for this data source, such as a database name',
is_optional => 1,
},
nosingleton => {
is => 'Boolean',
doc => 'Created data source should not inherit from UR::Singleton (defalt is that it will)',
default_value => 0,
},
],
is_abstract => 1,
);
sub help_description {
"Define a UR datasource connected to a relational database through UR::DataSource::RDBMS and DBI";
}
sub execute {
my $self = shift;
my $namespace = $self->namespace_name;
unless ($namespace) {
$self->error_message("This command must be run from a namespace directory.");
return;
}
unless ($self->__dsname || $self->__dsid) {
$self->error_message("Either --dsname or --dsid is required");
return;
}
# Force an autoload of the namespace module
#my $ret = above::use_package($namespace);
eval "use $namespace";
if ($@) {
$self->error_message("Can't load namespace $namespace: $@");
return;
}
unless (defined $self->server) {
$self->server($self->dsname);
}
my $ds_id = $self->dsid;
my $c = eval { UR::DataSource->get($ds_id) || $ds_id->get() };
if ($c) {
$self->error_message("A data source named $ds_id already exists\n");
return;
}
my $src = $self->_resolve_module_header($ds_id,$namespace);
my($class_definition,$parent_classes) = $self->_resolve_class_definition_source();
$src .= $class_definition;
my $module_body = $self->_resolve_module_body();
$src .= "\n$module_body\n1;\n";
my $module_path = $self->data_source_module_pathname();
my $fh = IO::File->new($module_path, O_WRONLY | O_CREAT | O_EXCL);
unless ($fh) {
$self->error_message("Can't open $module_path for writing: $!");
return;
}
$fh->print($src);
$fh->close();
$self->status_message("A $ds_id (" . join(',', @$parent_classes) . ")\n");
$self->_post_module_written();
if ($self->_try_connect()) {
return 1;
} else {
return;
}
}
sub _resolve_module_header {
my($self,$ds_id, $namespace) = @_;
return "package $ds_id;\n\nuse strict;\nuse warnings;\n\nuse $namespace;\n\n";
}
# Subclasses can override this to have something happen after the module
# is written, but before we try connecting to the DS
sub _post_module_written {
return 1;
}
# Subclasses must override this to indicate what abstract DS class they should
# inherit from
sub _data_source_sub_class_name {
my $self = shift;
my $class = ref($self);
die "Class $class didn't implement _data_source_sub_class_name";
}
sub _resolve_class_definition_source {
my $self = shift;
my $ds_id = $self->dsid;
my $parent_ds_class = $self->_data_source_sub_class_name();
my $src = "class $ds_id {\n";
my @parent_classes = ( $parent_ds_class );
if (! $self->nosingleton) {
push @parent_classes, 'UR::Singleton';
}
$src .= sprintf(" is => [ '%s' ],\n", join("', '", @parent_classes));
$src .= "};\n";
return($src,\@parent_classes);
}
sub _resolve_module_body {
my $self = shift;
my $server = $self->server;
my $src = "sub server { '$server' }\n";
return $src;
}
sub _try_connect {
my $self = shift;
$self->status_message(" ...connecting...");
my $ds_id = $self->dsid;
my $dbh = $ds_id->get_default_handle();
if ($dbh) {
$self->status_message(" ....ok\n");
return 1;
} else {
$self->error_message(" ERROR: " . $ds_id->error_message);
return;
}
}
1;
|
