X-Git-Url: https://git.tokkee.org/?a=blobdiff_plain;ds=sidebyside;f=gosa-si%2Fmodules%2FDBsqlite.pm;h=bce1e620cebb432b6325b374cf7dd7c6461d2415;hb=137cc176814f2e5d3750309b3bfe2072e14ee373;hp=840bce0d6fb7d67abd90f4ea0b28ce5a0a2ecb7a;hpb=2052d150f05495b25d4c41248a7c2420619d73b0;p=gosa.git

diff --git a/gosa-si/modules/DBsqlite.pm b/gosa-si/modules/DBsqlite.pm
index 840bce0d6..bce1e620c 100644
--- a/gosa-si/modules/DBsqlite.pm
+++ b/gosa-si/modules/DBsqlite.pm
@@ -5,284 +5,243 @@ use strict;
 use warnings;
 use DBI;
 use Data::Dumper;
+use GOSA::GosaSupportDaemon;
+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 = $db_name.".lock";
+	# delete existing lock - instance should be running only once
+	if(stat($lock)) {
+		unlink($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);
+}
+
+sub lock_exists : locked {
+    my $self=shift;
+    my $funcname=shift;
+    my $lock = $self->{db_lock};
+    my $result=(-f $lock);
+    if($result) {
+        #&main::daemon_log("(".((defined $funcname)?$funcname:"").") Lock (PID ".$$.") $lock found", 8);
+        usleep 100;
+    }
+    return $result;
+}
+
+sub create_lock : locked {
+    my $self=shift;
+    my $funcname=shift;
+    #&main::daemon_log("(".((defined $funcname)?$funcname:"").") Creating Lock (PID ".$$.") ".($self->{db_lock}),8);
+
+    my $lock = $self->{db_lock};
+    while( -f $lock ) {
+		#&main::daemon_log("(".((defined $funcname)?$funcname:"").") Lock (PID ".$$.") $lock found",8);
+        sleep 1;
+    }
+
+    open($self->{db_lock_handle},'>',$self->{db_lock});
+}
 
-    return($obj_ref);
+sub remove_lock : locked {
+    my $self=shift;
+    my $funcname=shift;
+    #&main::daemon_log("(".((defined $funcname)?$funcname:"").") Removing Lock (PID ".$$.") ".$self->{db_lock}, 8);
+    close($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");
-    my $col_names_string = join(', ', @{$col_names_ref});
+    my @col_names;
+    foreach my $col_name (@$col_names_ref) {
+        my @t = split(" ", $col_name);
+        $col_name = $t[0];
+        push(@col_names, $col_name);
+    }
+
+    $col_names->{ $table_name } = $col_names_ref;
+    my $col_names_string = join(', ', @col_names);
     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 (not exists $arg->{primkey}) {
+        return 2;
+    }
     my $primkey = $arg->{primkey};
 
-    # check wether value to primary key is specified
-    if ( ( defined $primkey ) && ( not $arg->{ $primkey } ) ) {
-        return 2;
+    # if primkey is id, fetch max id from table and give new job id=  max(id)+1
+    if ($primkey eq 'id') {
+        my $id;
+        my $sql_statement = "SELECT MAX(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 {
+            $id = 1;
+        }
+        $arg->{id} = $id;
     }
 
-    # check wether primkey is unique in table, otherwise return errorflag 3
-    my $res = @{ $obj->{dbh}->selectall_arrayref( "SELECT * FROM $table WHERE $primkey='$arg->{$primkey}'") };
+    # if timestamp is not provided, add timestamp   
+    if( not exists $arg->{timestamp} ) {
+        $arg->{timestamp} = &get_time;
+    }
+
+    # check wether primkey is unique in table, otherwise return errorflag
+    my $sql_statement = "SELECT * FROM $table WHERE $primkey='$arg->{$primkey}'";
+    &create_lock($self,'add_dbentry');
+    my $res = @{ $self->{dbh}->selectall_arrayref($sql_statement) };
+    &remove_lock($self,'add_dbentry');
     if ($res == 0) {
+        # primekey is unique
+
         # fetch column names of table
-        my $col_names = $obj->get_table_columns($table);
+        my $col_names = &get_table_columns($self, $table);
 
         # assign values to column name variables
         my @add_list;
         foreach my $col_name (@{$col_names}) {
-        # use function parameter for column values
+            # use function parameter for column values
+    
             if (exists $arg->{$col_name}) {
                 push(@add_list, $arg->{$col_name});
             }
         }    
 
-        my $sql_statement = " INSERT INTO $table VALUES ('".join("', '", @add_list)."')";
-        my $db_res = $obj->{dbh}->do($sql_statement);
+        my $sql_statement = "INSERT INTO $table VALUES ('".join("', '", @add_list)."')";
+        &create_lock($self,'add_dbentry');
+        my $db_res = $self->{dbh}->do($sql_statement);
+        &remove_lock($self,'add_dbentry');
         if( $db_res != 1 ) {
-            return 1;
-        } else { 
-            return 0;
-        }
+            return 4;
+        } 
 
     } else  {
-        my $update_hash = { table=>$table };
-        $update_hash->{where} = [ { $primkey=>[ $arg->{$primkey} ] } ];
-        $update_hash->{update} = [ {} ];
+        # entry already exists, so update it 
+        my $where_str= " WHERE $primkey='".$arg->{$primkey}."'";
+
+        my @update_l;
         while( my ($pram, $val) = each %{$arg} ) {
             if( $pram eq 'table' ) { next; }
             if( $pram eq 'primkey' ) { next; }
-            $update_hash->{update}[0]->{$pram} = [$val];
-        }
-        my $db_res = &update_dbentry( $obj, $update_hash );
-        if( $db_res != 1 ) {
-            return 1;
-        } else { 
-            return 0;
+            push(@update_l, "$pram='$val'");
         }
+        my $update_str= join(", ", @update_l);
+        $update_str= " SET $update_str";
+
+        my $sql_statement= "UPDATE $table $update_str $where_str";
+        my $db_res = &update_dbentry($self, $sql_statement );
 
     }
-#    # check wether primkey is unique in table, otherwise return errorflag 3
-#    if ( defined $primkey ) {
-#        my $res = @{ $obj->{dbh}->selectall_arrayref( "SELECT * FROM $table WHERE $primkey='$arg->{$primkey}'") };
-#        if ($res != 0) { 
-#            return 3;
-#        }
-#    }
-#  
-#    # fetch column names of table
-#    my $col_names = $obj->get_table_columns($table);
-#    
-#    # assign values to column name variables
-#    my @add_list;
-#    foreach my $col_name (@{$col_names}) {
-#        # use function parameter for column values
-#        if (exists $arg->{$col_name}) {
-#            push(@add_list, $arg->{$col_name});
-#        }
-#    }    
-#
-#    my $sql_statement = " INSERT INTO $table VALUES ('".join("', '", @add_list)."')";
-#    my $db_res = $obj->{dbh}->do($sql_statement);
-#    return 0;
 
+    return 0;
 }
 
-
-# error-flags
-# 1 no table ($table) defined
-# 2 no restriction parameter ($restric_pram) defined
-# 3 no restriction value ($restric_val) defined
-# 4 column name not known in table
-# 5 no column names to change specified
 sub update_dbentry {
-    my $obj = shift;
-    my $arg = shift;
-
-    # check completeness of function parameter
-    # extract table statement from arg hash
-    my $table = $arg->{table};
-    if (not defined $table) {
-        return 1;
-    } else {
-        delete $arg->{table};
-    }
-    
-    # extract where parameter from arg hash
-    my $where_statement = "";
-    if( exists $arg->{where} ) {
-        my $where_hash = @{ $arg->{where} }[0];
-        if( 0 < keys %{ $where_hash } ) {
-            my @where_list;    
-            while( my ($rest_pram, $rest_val) = each %{ $where_hash } ) {
-                my $statement;
-                if( $rest_pram eq 'timestamp' ) {
-                    $statement = "$rest_pram<'@{ $rest_val }[0]'";
-                } else {
-                    $statement = "$rest_pram='@{ $rest_val }[0]'";
-                }
-                push( @where_list, $statement );
-            }
-            $where_statement .= "WHERE ".join('AND ', @where_list);
-        }
-    }
-
-    # extract update parameter from arg hash
-    my $update_hash = @{ $arg->{update} }[0];
-    my $update_statement = "";
-    if( 0 < keys %{ $update_hash } ) {
-        my @update_list;    
-        while( my ($rest_pram, $rest_val) = each %{ $update_hash } ) {
-            my $statement = "$rest_pram='@{ $rest_val }[0]'";
-            push( @update_list, $statement );
-        }
-        $update_statement .= join(', ', @update_list);
-    }
-
-    my $sql_statement = "UPDATE $table SET $update_statement $where_statement";
-    my $db_answer = $obj->{dbh}->do($sql_statement);
+    my ($self, $sql)= @_;
+    my $db_answer= &exec_statement($self, $sql); 
     return $db_answer;
-}  
+}
 
 
 sub del_dbentry {
-    my $obj = shift;
-    my $arg = shift;
-
-    # check completeness of function parameter
-    # extract table statement from arg hash
-    my $table = $arg->{table};
-    if (not defined $table) {
-        return 1;
-    } else {
-        delete $arg->{table};
-    }
-
-    # collect select statements
-    my @del_list;
-    while (my ($pram, $val) = each %{$arg}) {
-        if ( $pram eq 'timestamp' ) {
-            push(@del_list, "$pram < '$val'");
-        } else {
-            push(@del_list, "$pram = '$val'");
-        }
-    }
-
-    my $where_statement;
-    if( not @del_list ) {
-        $where_statement = "";
-    } else {
-        $where_statement = "WHERE ".join(' AND ', @del_list);
-    }
-
-    my $sql_statement = "DELETE FROM $table $where_statement";
-    my $db_res = $obj->{dbh}->do($sql_statement);
- 
+    my ($self, $sql)= @_;;
+    my $db_res= &exec_statement($self, $sql);
     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]);
-    }
-
-    return \@columns; 
-}
-
-sub select_dbentry {
-    my $obj = shift;
-    my $arg = shift;
-
-    # check completeness of function parameter
-    # extract table statement from arg hash
-    my $table = $arg->{table};
-    if (not defined $table) {
-        return 1;
+    my @column_names;
+    
+    if(exists $col_names->{$table}) {
+        @column_names = @{$col_names->{$table}};
     } else {
-        delete $arg->{table};
-    }
+        &create_lock($self,'get_table_columns');
+        my @res = @{$self->{dbh}->selectall_arrayref("pragma table_info('$table')")};
+        &remove_lock($self,'get_table_columns');
 
-    # collect select statements
-    my @select_list;
-    my $sql_statement;
-    while (my ($pram, $val) = each %{$arg}) {
-        if ( $pram eq 'timestamp' ) {
-            push(@select_list, "$pram < '$val'");
-        } else {
-            push(@select_list, "$pram = '$val'");
+        foreach my $column (@res) {
+            push(@column_names, @$column[1]);
         }
     }
+    return \@column_names;
 
-    if (@select_list == 0) {
-        $sql_statement = "SELECT ROWID, * FROM '$table'";
-    } else {
-        $sql_statement = "SELECT ROWID, * FROM '$table' WHERE ".join(' AND ', @select_list);
-    }
+}
 
-    # query db
-    my $query_answer = $obj->{dbh}->selectall_arrayref($sql_statement);
+
+sub select_dbentry {
+    my ($self, $sql)= @_;
+    my $error= 0;
+    my $answer= {};
+    
+    my $db_answer= &exec_statement($self, $sql); 
 
     # 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);    
+    $sql =~ /FROM ([\S]*?)( |$)/g;
+    my $table = $1;
+    my $column_list = &get_table_columns($self, $table);    
     my $list_len = @{ $column_list } ;
-    my $answer = {};
     my $hit_counter = 0;
-
-    
-    foreach my $hit ( @{ $query_answer }) {
+    foreach my $hit ( @{ $db_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 ROWID, * FROM $table_name")};
+
+    my $sql_statement= "SELECT * FROM $table_name ORDER BY timestamp";
+    my $res= &exec_statement($self, $sql_statement);
+
     my @answer;
-    foreach my $hit (@res) {
+    foreach my $hit (@{$res}) {
         push(@answer, "hit: ".join(', ', @{$hit}));
     }
     return join("\n", @answer);
@@ -290,10 +249,27 @@ sub show_table {
 
 
 sub exec_statement {
-    my $obj = shift;
+    my $self = shift;
     my $sql_statement = shift;
-    my @res = @{$obj->{dbh}->selectall_arrayref($sql_statement)};
-    return \@res;
+
+    &create_lock($self,'exec_statement');
+    my @db_answer = @{$self->{dbh}->selectall_arrayref($sql_statement)};
+    &remove_lock($self, 'exec_statement');
+
+    return \@db_answer;
+}
+
+
+sub count_dbentries {
+    my ($self, $table)= @_;
+    my $error= 0;
+    my $answer= -1;
+    
+    my $sql_statement= "SELECT * FROM $table";
+    my $db_answer= &select_dbentry($self, $sql_statement); 
+
+    my $count = keys(%{$db_answer});
+    return $count;
 }
 
 1;