8d5ff4705c0764b5b89c4a4e599f11724d20b3bd
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);
13 my $col_names = {};
15 sub new {
16 my $class = shift;
17 my $db_name = shift;
19 my $lock = $db_name.".si.lock";
20 # delete existing lock - instance should be running only once
21 if(stat($lock)) {
22 &main::daemon_log("DEBUG: Removed existing lock $lock.", 7);
23 unlink($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 my $i=0;
41 if($result) {
42 if($i>10) {
43 &main::daemon_log("WARNING: (".((defined $funcname)?$funcname:"").") Lock (PID ".$$.") $lock found. Waiting time: ".($i*500)." us", 8);
44 }
45 usleep 500;
46 $i++;
47 }
48 return $result;
49 }
51 sub create_lock : locked {
52 my $self=shift;
53 my $funcname=shift;
54 #&main::daemon_log("(".((defined $funcname)?$funcname:"").") Creating Lock (PID ".$$.") ".($self->{db_lock}),8);
56 my $lock = $self->{db_lock};
57 while( -f $lock ) {
58 #&main::daemon_log("(".((defined $funcname)?$funcname:"").") Lock (PID ".$$.") $lock found",8);
59 usleep 100;
60 }
62 open($self->{db_lock_handle},'>',$self->{db_lock});
63 }
65 sub remove_lock : locked {
66 my $self=shift;
67 my $funcname=shift;
68 #&main::daemon_log("(".((defined $funcname)?$funcname:"").") Removing Lock (PID ".$$.") ".$self->{db_lock}, 8);
69 close($self->{db_lock_handle});
70 unlink($self->{db_lock});
71 }
74 sub create_table {
75 my $self = shift;
76 my $table_name = shift;
77 my $col_names_ref = shift;
78 my @col_names;
79 foreach my $col_name (@$col_names_ref) {
80 my @t = split(" ", $col_name);
81 $col_name = $t[0];
82 push(@col_names, $col_name);
83 }
85 $col_names->{ $table_name } = $col_names_ref;
86 my $col_names_string = join("', '", @col_names);
87 my $sql_statement = "CREATE TABLE IF NOT EXISTS $table_name ( '$col_names_string' )";
88 &create_lock($self,'create_table');
89 $self->{dbh}->do($sql_statement);
90 &remove_lock($self,'create_table');
91 return 0;
92 }
95 sub add_dbentry {
96 my $self = shift;
97 my $arg = shift;
99 # if dbh not specified, return errorflag 1
100 my $table = $arg->{table};
101 if( not defined $table ) {
102 return 1 ;
103 }
105 # specify primary key in table
106 if (not exists $arg->{primkey}) {
107 return (2, "a hash key 'primkey' with at least an empty list as value is necessary for add_dbentry");
108 }
109 my $primkeys = $arg->{'primkey'};
110 my $prim_statement="";
111 if( 0 != @$primkeys ) {
112 my @prim_list;
113 foreach my $primkey (@$primkeys) {
114 if($primkey eq 'id') {
115 # if primkey is id, fetch max id from table and give new job id= max(id)+1
116 my $sql_statement = "SELECT MAX(CAST(id AS INTEGER)) FROM $table";
117 &create_lock($self,'add_dbentry');
118 my $max_id = @{ @{ $self->{dbh}->selectall_arrayref($sql_statement) }[0] }[0];
119 &remove_lock($self,'add_dbentry');
120 my $id;
121 if( defined $max_id) {
122 $id = $max_id + 1;
123 } else {
124 $id = 1;
125 }
126 $arg->{id} = $id;
127 }
128 if( not exists $arg->{$primkey} ) {
129 return (3, "primkey '$primkey' has no value for add_dbentry");
130 }
131 push(@prim_list, "$primkey='".$arg->{$primkey}."'");
132 }
133 $prim_statement = "WHERE ".join(" AND ", @prim_list);
134 }
136 # if timestamp is not provided, add timestamp
137 if( not exists $arg->{timestamp} ) {
138 $arg->{timestamp} = &get_time;
139 }
141 # check wether primkey is unique in table, otherwise return errorflag
142 my $sql_statement = "SELECT * FROM $table $prim_statement";
143 &create_lock($self,'add_dbentry');
144 my $res = @{ $self->{dbh}->selectall_arrayref($sql_statement) };
145 &remove_lock($self,'add_dbentry');
147 if ($res == 0) {
148 # primekey is unique
150 # fetch column names of table
151 my $col_names = &get_table_columns($self, $table);
153 # assign values to column name variables
154 my @col_list;
155 my @val_list;
156 foreach my $col_name (@{$col_names}) {
157 # use function parameter for column values
158 if (exists $arg->{$col_name}) {
159 push(@col_list, $col_name);
160 push(@val_list, $arg->{$col_name});
161 }
162 }
164 my $sql_statement = "INSERT INTO $table (".join(", ", @col_list).") VALUES ('".join("', '", @val_list)."')";
165 &create_lock($self,'add_dbentry');
166 my $db_res = $self->{dbh}->do($sql_statement);
167 &remove_lock($self,'add_dbentry');
168 if( $db_res != 1 ) {
169 return (4, $sql_statement);
170 }
172 } else {
173 # entry already exists, so update it
174 my @update_l;
175 while( my ($pram, $val) = each %{$arg} ) {
176 if( $pram eq 'table' ) { next; }
177 if( $pram eq 'primkey' ) { next; }
178 push(@update_l, "$pram='$val'");
179 }
180 my $update_str= join(", ", @update_l);
181 $update_str= " SET $update_str";
183 my $sql_statement= "UPDATE $table $update_str $prim_statement";
184 my $db_res = &update_dbentry($self, $sql_statement );
186 }
188 return 0;
189 }
191 sub update_dbentry {
192 my ($self, $sql)= @_;
193 my $db_answer= &exec_statement($self, $sql);
194 return $db_answer;
195 }
198 sub del_dbentry {
199 my ($self, $sql)= @_;;
200 my $db_res= &exec_statement($self, $sql);
201 return $db_res;
202 }
205 sub get_table_columns {
206 my $self = shift;
207 my $table = shift;
208 my @column_names;
210 if(exists $col_names->{$table}) {
211 @column_names = @{$col_names->{$table}};
212 } else {
213 &create_lock($self,'get_table_columns');
214 my @res = @{$self->{dbh}->selectall_arrayref("pragma table_info('$table')")};
215 &remove_lock($self,'get_table_columns');
217 foreach my $column (@res) {
218 push(@column_names, @$column[1]);
219 }
220 }
221 return \@column_names;
223 }
226 sub select_dbentry {
227 my ($self, $sql)= @_;
228 my $error= 0;
229 my $answer= {};
231 my $db_answer= &exec_statement($self, $sql);
233 # fetch column list of db and create a hash with column_name->column_value of the select query
234 $sql =~ /FROM ([\S]*?)( |$)/g;
235 my $table = $1;
236 my $column_list = &get_table_columns($self, $table);
237 my $list_len = @{ $column_list } ;
238 my $hit_counter = 0;
239 foreach my $hit ( @{ $db_answer }) {
240 $hit_counter++;
241 for ( my $i = 0; $i < $list_len; $i++) {
242 $answer->{ $hit_counter }->{ @{ $column_list }[$i] } = @{ $hit }[$i];
243 }
244 }
246 return $answer;
247 }
250 sub show_table {
251 my $self = shift;
252 my $table_name = shift;
254 my $sql_statement= "SELECT * FROM $table_name ORDER BY timestamp";
255 my $res= &exec_statement($self, $sql_statement);
257 my @answer;
258 foreach my $hit (@{$res}) {
259 push(@answer, "hit: ".join(', ', @{$hit}));
260 }
261 return join("\n", @answer);
262 }
265 sub exec_statement {
266 my $self = shift;
267 my $sql_statement = shift;
269 &create_lock($self,'exec_statement');
270 my @db_answer = @{$self->{dbh}->selectall_arrayref($sql_statement)};
271 &remove_lock($self, 'exec_statement');
273 return \@db_answer;
274 }
277 sub exec_statementlist {
278 my $self = shift;
279 my $sql_list = shift;
280 my @db_answer;
282 &create_lock($self,'exec_statement');
283 foreach my $sql (@$sql_list) {
284 @db_answer = @{$self->{dbh}->selectall_arrayref($sql)};
285 }
286 &remove_lock($self, 'exec_statement');
288 return \@db_answer;
289 }
291 sub count_dbentries {
292 my ($self, $table)= @_;
293 my $error= 0;
294 my $answer= -1;
296 my $sql_statement= "SELECT * FROM $table";
297 my $db_answer= &select_dbentry($self, $sql_statement);
299 my $count = keys(%{$db_answer});
300 return $count;
301 }
305 sub move_table {
306 my ($self, $from, $to) = @_;
308 my $sql_statement_drop = "DROP TABLE IF EXISTS $to";
309 my $sql_statement_alter = "ALTER TABLE $from RENAME TO $to";
310 &create_lock($self,'move_table');
311 my $db_res = $self->{dbh}->do($sql_statement_drop);
312 $db_res = $self->{dbh}->do($sql_statement_alter);
313 &remove_lock($self,'move_table');
315 return;
316 }
319 1;