95ac1b68bc04fa5251ae5808bfe52101eaf2a801
1 package GOSA::DBsqlite;
4 use strict;
5 use warnings;
6 use DBI;
7 use Data::Dumper;
8 use GOSA::GosaSupportDaemon;
9 use threads;
10 use Time::HiRes qw(usleep);
14 my $col_names = {};
16 sub new {
17 my $class = shift;
18 my $db_name = shift;
20 my $lock = $db_name.".lock";
21 # delete existing lock - instance should be running only once
22 if(stat($lock)) {
23 unlink($lock);
24 }
25 my $self = {dbh=>undef,db_name=>undef,db_lock=>undef,db_lock_handle=>undef};
26 my $dbh = DBI->connect("dbi:SQLite:dbname=$db_name");
27 $self->{dbh} = $dbh;
28 $self->{db_name} = $db_name;
29 $self->{db_lock} = $lock;
30 bless($self,$class);
32 return($self);
33 }
35 sub lock_exists : locked {
36 my $self=shift;
37 my $funcname=shift;
38 my $lock = $self->{db_lock};
39 my $result=(-f $lock);
40 if($result) {
41 #&main::daemon_log("(".((defined $funcname)?$funcname:"").") Lock (PID ".$$.") $lock found", 8);
42 usleep 100;
43 }
44 return $result;
45 }
47 sub create_lock : locked {
48 my $self=shift;
49 my $funcname=shift;
50 #&main::daemon_log("(".((defined $funcname)?$funcname:"").") Creating Lock (PID ".$$.") ".($self->{db_lock}),8);
52 my $lock = $self->{db_lock};
53 while( -f $lock ) {
54 #&main::daemon_log("(".((defined $funcname)?$funcname:"").") Lock (PID ".$$.") $lock found",8);
55 sleep 1;
56 }
58 open($self->{db_lock_handle},'>',$self->{db_lock});
59 }
61 sub remove_lock : locked {
62 my $self=shift;
63 my $funcname=shift;
64 #&main::daemon_log("(".((defined $funcname)?$funcname:"").") Removing Lock (PID ".$$.") ".$self->{db_lock}, 8);
65 close($self->{db_lock_handle});
66 unlink($self->{db_lock});
67 }
70 sub create_table {
71 my $self = shift;
72 my $table_name = shift;
73 my $col_names_ref = shift;
74 $col_names->{ $table_name } = $col_names_ref;
75 my $col_names_string = join(', ', @{$col_names_ref});
76 my $sql_statement = "CREATE TABLE IF NOT EXISTS $table_name ( $col_names_string )";
77 &create_lock($self,'create_table');
78 $self->{dbh}->do($sql_statement);
79 &remove_lock($self,'create_table');
80 return 0;
81 }
84 sub add_dbentry {
85 my $self = shift;
86 my $arg = shift;
88 # if dbh not specified, return errorflag 1
89 my $table = $arg->{table};
90 if( not defined $table ) {
91 return 1 ;
92 }
94 # specify primary key in table
95 if (not exists $arg->{primkey}) {
96 return 2;
97 }
98 my $primkey = $arg->{primkey};
100 # if primkey is id, fetch max id from table and give new job id= max(id)+1
101 if ($primkey eq 'id') {
102 my $id;
103 my $sql_statement = "SELECT MAX(CAST(id AS INTEGER)) FROM $table";
104 &create_lock($self,'add_dbentry');
105 my $max_id = @{ @{ $self->{dbh}->selectall_arrayref($sql_statement) }[0] }[0];
106 &remove_lock($self,'add_dbentry');
107 if( defined $max_id) {
108 $id = $max_id + 1;
109 } else {
110 $id = 1;
111 }
112 $arg->{id} = $id;
113 }
115 # if timestamp is not provided, add timestamp
116 if( not exists $arg->{timestamp} ) {
117 $arg->{timestamp} = &get_time;
118 }
120 # check wether primkey is unique in table, otherwise return errorflag
121 my $sql_statement = "SELECT * FROM $table WHERE $primkey='$arg->{$primkey}'";
122 &create_lock($self,'add_dbentry');
123 my $res = @{ $self->{dbh}->selectall_arrayref($sql_statement) };
124 &remove_lock($self,'add_dbentry');
125 if ($res == 0) {
126 # primekey is unique
128 # fetch column names of table
129 my $col_names = &get_table_columns("",$table);
131 # assign values to column name variables
132 my @add_list;
133 foreach my $col_name (@{$col_names}) {
134 # use function parameter for column values
135 if (exists $arg->{$col_name}) {
136 push(@add_list, $arg->{$col_name});
137 }
138 }
140 my $sql_statement = "INSERT INTO $table VALUES ('".join("', '", @add_list)."')";
142 &create_lock($self,'add_dbentry');
143 my $db_res = $self->{dbh}->do($sql_statement);
144 &remove_lock($self,'add_dbentry');
145 if( $db_res != 1 ) {
146 return 4;
147 }
149 } else {
150 # entry already exists, so update it
151 my $where_str= " WHERE $primkey='".$arg->{$primkey}."'";
153 my @update_l;
154 while( my ($pram, $val) = each %{$arg} ) {
155 if( $pram eq 'table' ) { next; }
156 if( $pram eq 'primkey' ) { next; }
157 push(@update_l, "$pram='$val'");
158 }
159 my $update_str= join(", ", @update_l);
160 $update_str= " SET $update_str";
162 my $sql_statement= "UPDATE $table $update_str $where_str";
163 my $db_res = &update_dbentry($self, $sql_statement );
165 }
167 return 0;
168 }
170 sub update_dbentry {
171 my ($self, $sql)= @_;
172 my $db_answer= &exec_statement($self, $sql);
173 return $db_answer;
174 }
177 sub del_dbentry {
178 my ($self, $sql)= @_;;
179 my $db_res= &exec_statement($self, $sql);
180 return $db_res;
181 }
184 sub get_table_columns {
185 my $self = shift;
186 my $table = shift;
187 my @column_names;
189 if(exists $col_names->{$table}) {
190 @column_names = @{$col_names->{$table}};
191 } else {
192 &create_lock($self,'get_table_columns');
193 my @res = @{$self->{dbh}->selectall_arrayref("pragma table_info('$table')")};
194 &remove_lock($self,'get_table_columns');
195 foreach my $column (@res) {
196 push(@column_names, @$column[1]);
197 }
198 }
199 return \@column_names;
201 }
204 sub select_dbentry {
205 my ($self, $sql)= @_;
206 my $error= 0;
207 my $answer= {};
209 my $db_answer= &exec_statement($self, $sql);
211 # fetch column list of db and create a hash with column_name->column_value of the select query
212 $sql =~ /FROM ([\S]*?)( |$)/g;
213 my $table = $1;
214 my $column_list = &get_table_columns($self, $table);
215 my $list_len = @{ $column_list } ;
216 my $hit_counter = 0;
217 foreach my $hit ( @{ $db_answer }) {
218 $hit_counter++;
219 for ( my $i = 0; $i < $list_len; $i++) {
220 $answer->{ $hit_counter }->{ @{ $column_list }[$i] } = @{ $hit }[$i];
221 }
222 }
224 return $answer;
225 }
228 sub show_table {
229 my $self = shift;
230 my $table_name = shift;
232 my $sql_statement= "SELECT * FROM $table_name ORDER BY timestamp";
233 my $res= &exec_statement($self, $sql_statement);
235 my @answer;
236 foreach my $hit (@{$res}) {
237 push(@answer, "hit: ".join(', ', @{$hit}));
238 }
239 return join("\n", @answer);
240 }
243 sub exec_statement {
244 my $self = shift;
245 my $sql_statement = shift;
247 &create_lock($self,'exec_statement');
248 my @db_answer = @{$self->{dbh}->selectall_arrayref($sql_statement)};
249 &remove_lock($self, 'exec_statement');
251 return \@db_answer;
252 }
255 sub count_dbentries {
256 my ($self, $table)= @_;
257 my $error= 0;
258 my $answer= -1;
260 my $sql_statement= "SELECT * FROM $table";
261 my $db_answer= &select_dbentry($self, $sql_statement);
263 my $count = keys(%{$db_answer});
264 return $count;
265 }
267 1;