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index 97e843506a327aad737ef004830f89480cfb9714..e03152960c16d113e269f4e4368304dd9cd35ccd 100644 (file)
use warnings;
use DBI;
use Data::Dumper;
+use threads;
+use Time::HiRes qw(usleep);
-
+my $col_names = {};
sub new {
- my $object = shift;
+ my $class = shift;
my $db_name = shift;
- my $obj_ref = {};
- bless($obj_ref,$object);
+ my $lock='/tmp/gosa_si_lock';
+ my $_lock = $db_name;
+ $_lock =~ tr/\//_/;
+ $lock.=$_lock;
+ my $self = {dbh=>undef,db_name=>undef,db_lock=>undef,db_lock_handle=>undef};
my $dbh = DBI->connect("dbi:SQLite:dbname=$db_name");
- $obj_ref->{dbh} = $dbh;
+ $self->{dbh} = $dbh;
+ $self->{db_name} = $db_name;
+ $self->{db_lock} = $lock;
+ bless($self,$class);
+
+ return($self);
+}
- return($obj_ref);
+sub lock_exists : locked {
+ my $self=shift;
+ my $funcname=shift;
+ my $lock = $self->{db_lock};
+ my $result=(-f $lock);
+ if($result) {
+ #print STDERR "(".((defined $funcname)?$funcname:"").") Lock (PID ".$$.") $lock gefunden\n";
+ usleep 100;
+ }
+ return $result;
}
+sub create_lock : locked {
+ my $self=shift;
+ my $funcname=shift;
+ #print STDERR "(".((defined $funcname)?$funcname:"").") Erzeuge Lock (PID ".$$.") ".($self->{db_lock})."\n";
+
+ my $lock = $self->{db_lock};
+ while( -f $lock ) {
+ #print STDERR "(".((defined $funcname)?$funcname:"").") Lock (PID ".$$.") $lock gefunden\n";
+ sleep 1;
+ }
+
+ open($self->{db_lock_handle},'>',$self->{db_lock});
+}
+
+sub remove_lock : locked {
+ my $self=shift;
+ my $funcname=shift;
+ #print STDERR "(".((defined $funcname)?$funcname:"").") Entferne Lock (PID ".$$.") ".$self->{db_lock}."\n";
+ close($self->{db_lock_handle});
+ unlink($self->{db_lock});
+}
sub create_table {
- my $object = shift;
+ my $self = shift;
my $table_name = shift;
my $col_names_ref = shift;
-# unshift(@{$col_names_ref}, "id INTEGER PRIMARY KEY AUTOINCREMENT");
+ $col_names->{ $table_name } = $col_names_ref;
my $col_names_string = join(', ', @{$col_names_ref});
my $sql_statement = "CREATE TABLE IF NOT EXISTS $table_name ( $col_names_string )";
- $object->{dbh}->do($sql_statement);
+ &create_lock($self,'create_table');
+ $self->{dbh}->do($sql_statement);
+ &remove_lock($self,'create_table');
return 0;
}
sub add_dbentry {
-
- my $obj = shift;
+ my $self = shift;
my $arg = shift;
# if dbh not specified, return errorflag 1
my $table = $arg->{table};
- if (not defined $table) {
- return 1;
+ if( not defined $table ) {
+ return 1 ;
}
# specify primary key in table
# if primkey is id, fetch max id from table and give new job id= max(id)+1
if ($primkey eq 'id') {
my $id;
- my $sql_statement = "SELECT MAX(id) FROM $table";
- my $max_id = @{ @{ $obj->{dbh}->selectall_arrayref($sql_statement) }[0] }[0];
+ my $sql_statement = "SELECT MAX(CAST(id AS INTEGER)) FROM $table";
+ &create_lock($self,'add_dbentry');
+ my $max_id = @{ @{ $self->{dbh}->selectall_arrayref($sql_statement) }[0] }[0];
+ &remove_lock($self,'add_dbentry');
if( defined $max_id) {
$id = $max_id + 1;
} else {
$arg->{timestamp} = &get_time;
}
- # check wether primkey is unique in table, otherwise return errorflag 3
+ # check wether primkey is unique in table, otherwise return errorflag
my $sql_statement = "SELECT * FROM $table WHERE $primkey='$arg->{$primkey}'";
- my $res = @{ $obj->{dbh}->selectall_arrayref($sql_statement) };
+ &create_lock($self,'add_dbentry');
+ my $res = @{ $self->{dbh}->selectall_arrayref($sql_statement) };
+ &remove_lock($self,'add_dbentry');
if ($res == 0) {
# fetch column names of table
- my $col_names = $obj->get_table_columns($table);
+ my $col_names = &get_table_columns("",$table);
# assign values to column name variables
my @add_list;
}
}
- my $sql_statement = "BEGIN TRANSACTION; INSERT INTO $table VALUES ('".join("', '", @add_list)."'); COMMIT;";
- my $db_res = $obj->{dbh}->do($sql_statement);
+ my $sql_statement = "INSERT INTO $table VALUES ('".join("', '", @add_list)."')";
+ print STDERR $sql_statement;
+ &create_lock($self,'add_dbentry');
+ my $db_res = $self->{dbh}->do($sql_statement);
+ &remove_lock($self,'add_dbentry');
if( $db_res != 1 ) {
- return 1;
+ return 4;
} else {
return 0;
}
if( $pram eq 'primkey' ) { next; }
$update_hash->{update}[0]->{$pram} = [$val];
}
- my $db_res = &update_dbentry( $obj, $update_hash );
+ my $db_res = &update_dbentry( $self, $update_hash );
if( $db_res != 1 ) {
- return 1;
+ return 5;
} else {
return 0;
}
# 4 column name not known in table
# 5 no column names to change specified
sub update_dbentry {
- my $obj = shift;
+ my $self = shift;
my $arg = shift;
+
# check completeness of function parameter
# extract table statement from arg hash
my $table = $arg->{table};
$update_statement .= join(', ', @update_list);
}
- my $sql_statement = "BEGIN TRANSACTION; UPDATE $table SET $update_statement $where_statement; COMMIT;";
- my $db_answer = $obj->{dbh}->do($sql_statement);
+ my $sql_statement = "UPDATE $table SET $update_statement $where_statement";
+ &create_lock($self,'update_dbentry');
+ my $db_answer = $self->{dbh}->do($sql_statement);
+ &remove_lock($self,'update_dbentry');
return $db_answer;
}
sub del_dbentry {
- my $obj = shift;
+ my $self = shift;
my $arg = shift;
+
# check completeness of function parameter
# extract table statement from arg hash
my $table = $arg->{table};
$where_statement = "WHERE ".join(' AND ', @del_list);
}
- my $sql_statement = "BEGIN TRANSACTION; DELETE FROM $table $where_statement; COMMIT;";
- my $db_res = $obj->{dbh}->do($sql_statement);
-
+ my $sql_statement = "DELETE FROM $table $where_statement";
+ &create_lock($self,'del_dbentry');
+ my $db_res = $self->{dbh}->do($sql_statement);
+ &remove_lock($self,'del_dbentry');
return $db_res;
}
sub get_table_columns {
- my $obj = shift;
+ my $self = shift;
my $table = shift;
-
- my @columns;
- my @res = @{$obj->{dbh}->selectall_arrayref("pragma table_info('$table')")};
- foreach my $column (@res) {
- push(@columns, @$column[1]);
+ my @column_names;
+
+ if(exists $col_names->{$table}) {
+ @column_names = @{$col_names->{$table}};
+ } else {
+ &create_lock($self,'get_table_columns');
+ my @res = @{$self->{dbh}->selectall_arrayref("pragma table_info('$table')")};
+ &remove_lock($self,'get_table_columns');
+ foreach my $column (@res) {
+ push(@column_names, @$column[1]);
+ }
}
+ return \@column_names;
- return \@columns;
}
sub select_dbentry {
- my $obj = shift;
+ my $self = shift;
my $arg = shift;
+
# check completeness of function parameter
# extract table statement from arg hash
my $table = $arg->{table};
}
if (@select_list == 0) {
- $sql_statement = "SELECT ROWID, * FROM '$table'";
+ $sql_statement = "SELECT * FROM '$table'";
} else {
- $sql_statement = "SELECT ROWID, * FROM '$table' WHERE ".join(' AND ', @select_list);
+ $sql_statement = "SELECT * FROM '$table' WHERE ".join(' AND ', @select_list);
}
# query db
- my $query_answer = $obj->{dbh}->selectall_arrayref($sql_statement);
+ &create_lock($self,'select_dbentry');
+ my $query_answer = $self->{dbh}->selectall_arrayref($sql_statement);
+ &remove_lock($self,'select_dbentry');
# fetch column list of db and create a hash with column_name->column_value of the select query
- my $column_list = &get_table_columns($obj, $table);
+ my $column_list = &get_table_columns($self, $table);
my $list_len = @{ $column_list } ;
my $answer = {};
my $hit_counter = 0;
-
foreach my $hit ( @{ $query_answer }) {
$hit_counter++;
- $answer->{ $hit_counter }->{ 'ROWID' } = shift @{ $hit };
for ( my $i = 0; $i < $list_len; $i++) {
$answer->{ $hit_counter }->{ @{ $column_list }[$i] } = @{ $hit }[$i];
}
}
+
return $answer;
}
sub show_table {
- my $obj = shift;
+ my $self = shift;
my $table_name = shift;
- my @res = @{$obj->{dbh}->selectall_arrayref( "SELECT * FROM $table_name")};
+ &create_lock($self,'show_table');
+ my @res = @{$self->{dbh}->selectall_arrayref( "SELECT * FROM $table_name")};
+ &remove_lock($self,'show_table');
my @answer;
foreach my $hit (@res) {
push(@answer, "hit: ".join(', ', @{$hit}));
sub exec_statement {
- my $obj = shift;
+ my $self = shift;
my $sql_statement = shift;
- my @res = @{$obj->{dbh}->selectall_arrayref($sql_statement)};
+ &create_lock($self,'exec_statement');
+ my @res = @{$self->{dbh}->selectall_arrayref($sql_statement)};
+ &remove_lock($self, 'exec_statement');
return \@res;
}