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xcat-core/perl-xCAT/xCAT/Table.pm
jbjohnso 8da81ece39 -Fix syntax error in Table.pm 
git-svn-id: https://svn.code.sf.net/p/xcat/code/xcat-core/trunk@1878 8638fb3e-16cb-4fca-ae20-7b5d299a9bcd
2008-07-14 14:35:54 +00:00

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Perl
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# IBM(c) 2007 EPL license http://www.eclipse.org/legal/epl-v10.html
#Note that at the moment it only implements SQLite. This will probably be extended.
#Also, ugly perl errors/and warnings are not currently wrapped. This probably will be cleaned
#up
#Some known weird behaviors
#creating new sqlite db files when only requested to read non-existant table, easy to fix,
#but going for prototype
#class xcattable
package xCAT::Table;
use Sys::Syslog;
BEGIN
{
$::XCATROOT = $ENV{'XCATROOT'} ? $ENV{'XCATROOT'} : -d '/opt/xcat' ? '/opt/xcat' : '/usr';
}
use lib "$::XCATROOT/lib/perl";
my $cachethreshold=16; #How many nodes in 'getNodesAttribs' before switching to full DB retrieval
use DBI;
#use strict;
#use Data::Dumper;
use Scalar::Util qw/weaken/;
require xCAT::Schema;
require xCAT::NodeRange;
use Text::Balanced qw(extract_bracketed);
require xCAT::NotifHandler;
#--------------------------------------------------------------------------------
=head1 xCAT::Table
xCAT::Table - Perl module for xCAT configuration access
=head2 SYNOPSIS
use xCAT::Table;
my $table = xCAT::Table->new("tablename");
my $hashref=$table->getNodeAttribs("nodename","columname1","columname2");
printf $hashref->{columname1};
=head2 DESCRIPTION
This module provides convenience methods that abstract the backend specific configuration to a common API.
Currently implements the preferred SQLite backend, as well as a CSV backend, using their respective perl DBD modules.
NOTES
The CSV backend is really slow at scale. Room for optimization is likely, but in general DBD::CSV is slow, relative to xCAT 1.2.x.
The SQLite backend, on the other hand, is significantly faster on reads than the xCAT 1.2.x way, so it is recommended.
BUGS
This module is not thread-safe, due to underlying DBD thread issues. Specifically in testing, SQLite DBD leaks scalars if a thread
where a Table object exists spawns a child and that child exits. The recommended workaround for now is to spawn a thread to contain
all Table objects if you intend to spawn threads from your main thread. As long as no thread in which the new method is called spawns
child threads, it seems to work fine.
AUTHOR
Jarrod Johnson <jbjohnso@us.ibm.com>
xCAT::Table is released under an IBM license....
=cut
#--------------------------------------------------------------------------
=head2 Subroutines
=cut
#--------------------------------------------------------------------------
=head3 buildcreatestmt
Description: Build create table statement ( see new)
Arguments:
Table name
Table schema ( hash of column names)
Returns:
Table creation SQL
Globals:
Error:
Example:
my $str =
buildcreatestmt($self->{tabname},
$xCAT::Schema::tabspec{$self->{tabname}});
=cut
#--------------------------------------------------------------------------------
sub buildcreatestmt
{
my $tabn = shift;
my $descr = shift;
my $retv = "CREATE TABLE $tabn (\n ";
my $col;
foreach $col (@{$descr->{cols}})
{
$retv .= "$col TEXT";
if (grep /^$col$/, @{$descr->{required}})
{
$retv .= " NOT NULL";
}
$retv .= ",\n ";
}
$retv .= "PRIMARY KEY (";
foreach (@{$descr->{keys}})
{
$retv .= "$_,";
}
$retv =~ s/,$/)\n)/;
return $retv;
}
#--------------------------------------------------------------------------
=head3 new
Description: Constructor: Connects to or Creates Database Table
Arguments: Table name
0 = Connect to table
1 = Create table
Returns:
Hash: Database Handle, Statement Handle, nodelist
Globals:
Error:
Example:
$nodelisttab = xCAT::Table->new("nodelist");
Comments:
none
=cut
#--------------------------------------------------------------------------------
sub new
{
#Constructor takes table name as argument
#Also takes a true/false value, or assumes 0. If something true is passed, create table
#is requested
my $self = {};
my $proto = shift;
$self->{tabname} = shift;
unless (defined($xCAT::Schema::tabspec{$self->{tabname}})) { return undef; }
$self->{schema} = $xCAT::Schema::tabspec{$self->{tabname}};
$self->{colnames} = \@{$self->{schema}->{cols}};
$self->{descriptions} = \%{$self->{schema}->{descriptions}};
my %otherargs = @_;
my $create = $otherargs{'-create'}; #(scalar(@_) == 1 ? shift : 0);
$self->{autocommit} = $otherargs{'-autocommit'};
unless (defined($self->{autocommit}))
{
$self->{autocommit} = 1;
}
my $class = ref($proto) || $proto;
$self->{dbuser}="";
$self->{dbpass}="";
my $xcatcfg = (defined $ENV{'XCATCFG'} ? $ENV{'XCATCFG'} : '');
unless ($xcatcfg) {
if (-r "/etc/xcat/cfgloc") {
my $cfgl;
open($cfgl,"<","/etc/xcat/cfgloc");
$xcatcfg = <$cfgl>;
close($cfgl);
chomp($xcatcfg);
$ENV{'XCATCFG'}=$xcatcfg; #Store it in env to avoid many file reads
}
}
if ($xcatcfg =~ /^$/)
{
if (-d "/opt/xcat/cfg")
{
$xcatcfg = "SQLite:/opt/xcat/cfg";
}
else
{
if (-d "/etc/xcat")
{
$xcatcfg = "SQLite:/etc/xcat";
}
}
}
($xcatcfg =~ /^$/) && die "Can't locate xCAT configuration";
unless ($xcatcfg =~ /:/)
{
$xcatcfg = "SQLite:" . $xcatcfg;
}
if ($xcatcfg =~ /^SQLite:/)
{
$self->{backend_type} = 'sqlite';
my @path = split(':', $xcatcfg, 2);
unless (-e $path[1] . "/" . $self->{tabname} . ".sqlite" || $create)
{
return undef;
}
$self->{connstring} =
"dbi:" . $xcatcfg . "/" . $self->{tabname} . ".sqlite";
}
elsif ($xcatcfg =~ /^CSV:/)
{
$self->{backend_type} = 'csv';
$xcatcfg =~ m/^.*?:(.*)$/;
my $path = $1;
$self->{connstring} = "dbi:CSV:f_dir=" . $path;
}
else #Generic DBI
{
($self->{connstring},$self->{dbuser},$self->{dbpass}) = split(/\|/,$xcatcfg);
$self->{connstring} =~ s/^dbi://;
$self->{connstring} =~ s/^/dbi:/;
#return undef;
}
unless ($::XCAT_DBHS->{$self->{connstring},$self->{dbuser},$self->{dbpass},$self->{autocommit}}) { #= $self->{tabname};
$::XCAT_DBHS->{$self->{connstring},$self->{dbuser},$self->{dbpass},$self->{autocommit}} =
DBI->connect($self->{connstring}, $self->{dbuser}, $self->{dbpass}, {AutoCommit => $self->{autocommit}});
}
$self->{dbh} = $::XCAT_DBHS->{$self->{connstring},$self->{dbuser},$self->{dbpass},$self->{autocommit}};
#DBI->connect($self->{connstring}, $self->{dbuser}, $self->{dbpass}, {AutoCommit => $autocommit});
if ($xcatcfg =~ /^SQLite:/)
{
my $dbexistq =
"SELECT name from sqlite_master WHERE type='table' and name = ?";
my $sth = $self->{dbh}->prepare($dbexistq);
$sth->execute($self->{tabname});
my $result = $sth->fetchrow();
$sth->finish;
unless (defined $result)
{
if ($create)
{
my $str =
buildcreatestmt($self->{tabname},
$xCAT::Schema::tabspec{$self->{tabname}});
$self->{dbh}->do($str);
}
else { return undef; }
}
}
elsif ($xcatcfg =~ /^CSV:/)
{
$self->{dbh}->{'csv_tables'}->{$self->{tabname}} =
{'file' => $self->{tabname} . ".csv"};
$xcatcfg =~ m/^.*?:(.*)$/;
my $path = $1;
if (!-e $path . "/" . $self->{tabname} . ".csv")
{
unless ($create)
{
return undef;
}
my $str =
buildcreatestmt($self->{tabname},
$xCAT::Schema::tabspec{$self->{tabname}});
$self->{dbh}->do($str);
}
} else { #generic DBI
my $tbexistq = $self->{dbh}->table_info('','',$self->{tabname},'TABLE');
my $found = 0;
while (my $data = $tbexistq->fetchrow_hashref) {
if ($data->{'TABLE_NAME'} =~ /^\"?$self->{tabname}\"?\z/) {
$found = 1;
last;
}
}
unless ($found) {
unless ($create)
{
return undef;
}
my $str =
buildcreatestmt($self->{tabname},
$xCAT::Schema::tabspec{$self->{tabname}});
$self->{dbh}->do($str);
}
}
updateschema($self);
if ($self->{tabname} eq 'nodelist')
{
weaken($self->{nodelist} = $self);
}
else
{
$self->{nodelist} = xCAT::Table->new('nodelist',-create=>1);
}
bless($self, $class);
return $self;
}
#--------------------------------------------------------------------------
=head3 updateschema
Description: Alters table schema
Arguments: Hash containing Database and Table Handle and schema
Returns: None
Globals:
Error:
Example:
$self->{tabname} = shift;
$self->{schema} = $xCAT::Schema::tabspec{$self->{tabname}};
$self->{colnames} = \@{$self->{schema}->{cols}};
updateschema($self);
Comments:
none
=cut
#--------------------------------------------------------------------------------
sub updateschema
{
#This determines alter table statements required..
my $self = shift;
my @columns;
if ($self->{backend_type} eq 'sqlite')
{
my $dbexistq =
"SELECT sql from sqlite_master WHERE type='table' and name = ?";
my $sth = $self->{dbh}->prepare($dbexistq);
$sth->execute($self->{tabname});
my $cstmt = $sth->fetchrow();
$sth->finish;
#my $cstmt = $result->{sql};
$cstmt =~ s/.*\(//;
$cstmt =~ s/\)$//;
my @entries = split /,/, $cstmt;
foreach (@entries)
{
unless (/\(/)
{ #Filter out the PRIMARY KEY statement, but not if on a col
my $colname = $_;
$colname =~ s/^\s*(\S+)\s+.*\s*$/$1/
; #I don't understand why it won't work otherwise for " colname TEXT "
push @columns, $colname;
}
}
} else { #Attempt generic dbi..
my $sth = $self->{dbh}->column_info('','',$self->{tabname},'');
while (my $cd = $sth->fetchrow_hashref) {
push @columns,$cd->{'COLUMN_NAME'};
}
foreach (@columns) { #Column names may end up quoted by database engin
s/"//g;
}
}
#Now @columns reflects the *actual* columns in the database
my $dcol;
foreach $dcol (@{$self->{colnames}})
{
unless (grep /^$dcol$/, @columns)
{
#TODO: log/notify of schema upgrade?
my $stmt =
"ALTER TABLE " . $self->{tabname} . " ADD $dcol TEXT";
$self->{dbh}->do($stmt);
}
}
}
#--------------------------------------------------------------------------
=head3 setNodeAttribs
Description: Set attributes values on the node input to the routine
Arguments:
Hash: Database Handle, Statement Handle, nodelist
Node name
Attribute hash
Returns:
Globals:
Error:
Example:
my $mactab = xCAT::Table->new('mac',-create=>1);
$mactab->setNodeAttribs($node,{mac=>$mac});
$mactab->close();
Comments:
none
=cut
#--------------------------------------------------------------------------------
sub setNodeAttribs
{
my $self = shift;
my $node = shift;
return $self->setAttribs({'node' => $node}, @_);
}
#--------------------------------------------------------------------------
=head3 addNodeAttribs
Description: Add new attributes input to the routine to the nodes
Arguments:
Hash of new attributes
Returns:
Globals:
Error:
Example:
Comments:
none
=cut
#--------------------------------------------------------------------------------
sub addNodeAttribs
{
my $self = shift;
return $self->addAttribs('node', @_);
}
#--------------------------------------------------------------------------
=head3 addAttribs
Description: add new attributes
Arguments:
Hash: Database Handle, Statement Handle, nodelist
Key name
Key value
Hash reference of column-value pairs to set
Returns:
Globals:
Error:
Example:
Comments:
none
=cut
#--------------------------------------------------------------------------------
sub addAttribs
{
my $self = shift;
my $key = shift;
my $keyval = shift;
my $elems = shift;
my $cols = "";
my @bind = ();
@bind = ($keyval);
$cols = "$key,";
for my $col (keys %$elems)
{
$cols = $cols . $col . ",";
if (ref($$elems{$col}))
{
push @bind, ${$elems}{$col}->[0];
}
else
{
push @bind, $$elems{$col};
}
}
chop($cols);
my $qstring = 'INSERT INTO ' . $self->{tabname} . " ($cols) VALUES (";
for (@bind)
{
$qstring = $qstring . "?,";
}
$qstring =~ s/,$/)/;
my $sth = $self->{dbh}->prepare($qstring);
$sth->execute(@bind);
#$self->{dbh}->commit;
#notify the interested parties
my $notif = xCAT::NotifHandler->needToNotify($self->{tabname}, 'a');
if ($notif == 1)
{
my %new_notif_data;
$new_notif_data{$key} = $keyval;
foreach (keys %$elems)
{
$new_notif_data{$_} = $$elems{$_};
}
xCAT::NotifHandler->notify("a", $self->{tabname}, [0],
\%new_notif_data);
}
}
#--------------------------------------------------------------------------
=head3 rollback
Description: rollback changes
Arguments:
Database Handle
Returns:
none
Globals:
Error:
Example:
my $tab = xCAT::Table->new($table,-create =>1,-autocommit=>0);
$tab->rollback();
Comments:
none
=cut
#--------------------------------------------------------------------------------
sub rollback
{
my $self = shift;
$self->{dbh}->rollback;
}
#--------------------------------------------------------------------------
=head3 commit
Description:
Commit changes
Arguments:
Database Handle
Returns:
none
Globals:
Error:
Example:
my $tab = xCAT::Table->new($table,-create =>1,-autocommit=>0);
$tab->commit();
Comments:
none
=cut
#--------------------------------------------------------------------------------
sub commit
{
my $self = shift;
$self->{dbh}->commit;
}
#--------------------------------------------------------------------------
=head3 setAttribs
Description:
Arguments:
Key name
Key value
Hash reference of column-value pairs to set
Returns:
None
Globals:
Error:
Example:
my $tab = xCAT::Table->new( 'ppc', -create=>1, -autocommit=>0 );
$keyhash{'node'} = $name;
$updates{'type'} = lc($type);
$updates{'id'} = $lparid;
$updates{'hcp'} = $server;
$updates{'profile'} = $prof;
$updates{'frame'} = $frame;
$updates{'mtms'} = "$model*$serial";
$tab->setAttribs( \%keyhash,\%updates );
$tab->commit;
Comments:
none
=cut
#--------------------------------------------------------------------------------
sub setAttribs
{
#Takes three arguments:
#-Key name
#-Key value
#-Hash reference of column-value pairs to set
my $self = shift;
my %keypairs = %{shift()};
#my $key = shift;
#my $keyval=shift;
my $elems = shift;
my $cols = "";
my @bind = ();
my $action;
my @notif_data;
my $qstring = "SELECT * FROM " . $self->{tabname} . " WHERE ";
my @qargs = ();
foreach (keys %keypairs)
{
$qstring .= "$_ = ? AND ";
push @qargs, $keypairs{$_};
}
$qstring =~ s/ AND \z//;
my $query = $self->{dbh}->prepare($qstring);
$query->execute(@qargs);
#get the first row
my $data = $query->fetchrow_arrayref();
if (defined $data)
{
$action = "u";
}
else
{
$action = "a";
}
#prepare the notification data
my $notif =
xCAT::NotifHandler->needToNotify($self->{tabname}, $action);
if ($notif == 1)
{
if ($action eq "u")
{
#put the column names at the very front
push(@notif_data, $query->{NAME});
#copy the data out because fetchall_arrayref overrides the data.
my @first_row = @$data;
push(@notif_data, \@first_row);
#get the rest of the rows
my $temp_data = $query->fetchall_arrayref();
foreach (@$temp_data)
{
push(@notif_data, $_);
}
}
}
$query->finish();
if ($action eq "u")
{
#update the rows
$action = "u";
for my $col (keys %$elems)
{
$cols = $cols . $col . " = ?,";
push @bind, (($$elems{$col} =~ /NULL/) ? undef: $$elems{$col});
}
chop($cols);
my $cmd = "UPDATE " . $self->{tabname} . " set $cols where ";
foreach (keys %keypairs)
{
if (ref($keypairs{$_}))
{
$cmd .= $_ . " = '" . $keypairs{$_}->[0] . "' AND ";
}
else
{
$cmd .= $_ . " = '" . $keypairs{$_} . "' AND ";
}
}
$cmd =~ s/ AND \z//;
my $sth = $self->{dbh}->prepare($cmd);
unless ($sth) {
return (undef,"Error attempting requested DB operation");
}
my $err = $sth->execute(@bind);
if (not defined($err))
{
return (undef, $sth->errstr);
}
$sth->finish;
}
else
{
#insert the rows
$action = "a";
@bind = ();
$cols = "";
my %newpairs;
#first, merge the two structures to a single hash
foreach (keys %keypairs)
{
$newpairs{$_} = $keypairs{$_};
}
for my $col (keys %$elems)
{
$newpairs{$col} = $$elems{$col};
}
foreach (keys %newpairs) {
$cols .= $_ . ",";
push @bind, $newpairs{$_};
}
chop($cols);
my $qstring = 'INSERT INTO ' . $self->{tabname} . " ($cols) VALUES (";
for (@bind)
{
$qstring = $qstring . "?,";
}
$qstring =~ s/,$/)/;
my $sth = $self->{dbh}->prepare($qstring);
my $err = $sth->execute(@bind);
if (not defined($err))
{
return (undef, $sth->errstr);
}
$sth->finish;
}
#notify the interested parties
if ($notif == 1)
{
#create new data ref
my %new_notif_data = %keypairs;
foreach (keys %$elems)
{
$new_notif_data{$_} = $$elems{$_};
}
xCAT::NotifHandler->notify($action, $self->{tabname},
\@notif_data, \%new_notif_data);
}
return 0;
}
#--------------------------------------------------------------------------
=head3 setAttribsWhere
Description:
This function sets the attributes for the rows selected by the where clause.
Arguments:
Where clause.
Hash reference of column-value pairs to set
Returns:
None
Globals:
Error:
Example:
my $tab = xCAT::Table->new( 'ppc', -create=>1, -autocommit=>1 );
$updates{'type'} = lc($type);
$updates{'id'} = $lparid;
$updates{'hcp'} = $server;
$updates{'profile'} = $prof;
$updates{'frame'} = $frame;
$updates{'mtms'} = "$model*$serial";
$tab->setAttribs( "node in ('node1', 'node2', 'node3')", \%updates );
Comments:
none
=cut
#--------------------------------------------------------------------------------
sub setAttribsWhere
{
#Takes three arguments:
#-Where clause
#-Hash reference of column-value pairs to set
my $self = shift;
my $where_clause = shift;
my $elems = shift;
my $cols = "";
my @bind = ();
my $action;
my @notif_data;
my $qstring = "SELECT * FROM " . $self->{tabname} . " WHERE " . $where_clause;
my @qargs = ();
my $query = $self->{dbh}->prepare($qstring);
$query->execute(@qargs);
#get the first row
my $data = $query->fetchrow_arrayref();
if (defined $data){ $action = "u";}
else { return (0, "no rows selected."); }
#prepare the notification data
my $notif =
xCAT::NotifHandler->needToNotify($self->{tabname}, $action);
if ($notif == 1)
{
#put the column names at the very front
push(@notif_data, $query->{NAME});
#copy the data out because fetchall_arrayref overrides the data.
my @first_row = @$data;
push(@notif_data, \@first_row);
#get the rest of the rows
my $temp_data = $query->fetchall_arrayref();
foreach (@$temp_data) {
push(@notif_data, $_);
}
}
$query->finish();
#update the rows
for my $col (keys %$elems)
{
$cols = $cols . $col . " = ?,";
push @bind, (($$elems{$col} =~ /NULL/) ? undef: $$elems{$col});
}
chop($cols);
my $cmd = "UPDATE " . $self->{tabname} . " set $cols where " . $where_clause;
my $sth = $self->{dbh}->prepare($cmd);
my $err = $sth->execute(@bind);
if (not defined($err))
{
return (undef, $sth->errstr);
}
#notify the interested parties
if ($notif == 1)
{
#create new data ref
my %new_notif_data = ();
foreach (keys %$elems)
{
$new_notif_data{$_} = $$elems{$_};
}
xCAT::NotifHandler->notify($action, $self->{tabname},
\@notif_data, \%new_notif_data);
}
$sth->finish;
return 0;
}
#--------------------------------------------------------------------------
=head3 setNodesAttribs
Description: Unconditionally assigns the requested values to tables for a list of nodes
Arguments:
'self' (implicit in OO style call)
Reference to a list of nodes (no noderanges, just nodes)
A hash of attributes to set, like in 'setNodeAttribs'
Returns:
=cut
#--------------------------------------------------------------------------
sub setNodesAttribs {
#This is currently a stub to be filled out with at scale enhancements. It will be a touch more complex than getNodesAttribs, due to the notification
#The three steps should be:
#-Query table and divide nodes into list to update and list to insert
#-Update intelligently with respect to scale
#-Insert intelligently with respect to scale
#Intelligently in this case means folding them to some degree. Update where clauses will be longer, but must be capped to avoid exceeding SQL statement length restrictions on some DBs. Restricting even all the way down to 256 could provide better than an order of magnitude better performance though
my $self = shift;
my $nodelist = shift;
foreach (@$nodelist) {
$self->setNodeAttribs($_,@_);
}
}
#--------------------------------------------------------------------------
=head3 getNodesAttribs
Description: Retrieves the requested attributes for a node list
Arguments:
Table handle ('self')
List ref of nodes
Attribute type array
Returns:
two layer hash reference (->{nodename}->{attrib}
Globals:
Error:
Example:
my $ostab = xCAT::Table->new('nodetype');
my $ent = $ostab->getNodesAttribs(\@nodes,['profile','os','arch']);
if ($ent) { print $ent->{n1}->{profile}
Comments:
Using this function will clue the table layer into the atomic nature of the request, and allow shortcuts to be taken as appropriate to fulfill the request at scale.
=cut
#--------------------------------------------------------------------------------
sub getNodesAttribs {
my $self = shift;
my $nodelist = shift;
my @attribs;
if (ref $_[0]) {
@attribs = @{shift()};
} else {
@attribs = @_;
}
if (scalar($nodelist) > $cachethreshold) {
$self->{_use_cache} = 0;
$self->{nodelist}->{_use_cache}=0;
$self->_build_cache(\@attribs);
$self->{nodelist}->_build_cache(['node','groups']);
$self->{_use_cache} = 1;
$self->{nodelist}->{_use_cache}=1;
}
my $rethash;
foreach (@$nodelist) {
my @nodeentries=$self->getNodeAttribs($_,\@attribs);
$rethash->{$_} = \@nodeentries; #$self->getNodeAttribs($_,\@attribs);
}
$self->{_use_cache} = 0;
$self->{nodelist}->{_use_cache} = 0;
return $rethash;
}
sub _build_cache { #PRIVATE FUNCTION, PLEASE DON'T CALL DIRECTLY
my $self = shift;
my $attriblist = shift;
unless (grep /^node$/,@$attriblist) {
push @$attriblist,'node';
}
my @tabcache = $self->getAllAttribs(@$attriblist);
$self->{_tablecache} = \@tabcache;
$self->{_nodecache} = {};
if ($tabcache[0]->{node}) {
foreach(@tabcache) {
push @{$self->{_nodecache}->{$_->{node}}},$_;
}
}
$self->{_cachestamp} = time;
}
#--------------------------------------------------------------------------
=head3 getNodeAttribs
Description: Retrieves the requested attribute
Arguments:
Table handle
Noderange
Attribute type array
Returns:
Attribute hash ( key attribute type)
Globals:
Error:
Example:
my $ostab = xCAT::Table->new('nodetype');
my $ent = $ostab->getNodeAttribs($node,['profile','os','arch']);
Comments:
none
=cut
#--------------------------------------------------------------------------------
sub getNodeAttribs
{
my $self = shift;
my $node = shift;
my @attribs;
if (ref $_[0]) {
@attribs = @{shift()};
} else {
@attribs = @_;
}
my $datum;
my @data = $self->getNodeAttribs_nosub($node, \@attribs);
#my ($datum, $extra) = $self->getNodeAttribs_nosub($node, \@attribs);
if ($extra) { return undef; } # return (undef,"Ambiguous query"); }
defined($data[0])
|| return undef; #(undef,"No matching entry found in configuration");
my $attrib;
foreach $datum (@data) {
foreach $attrib (@attribs)
{
if ($datum->{$attrib} =~ /^\/.*\/.*\//)
{
my $exp = substr($datum->{$attrib}, 1);
chop $exp;
my @parts = split('/', $exp, 2);
$node =~ s/$parts[0]/$parts[1]/;
$datum->{$attrib} = $node;
}
elsif ($datum->{$attrib} =~ /^\|.*\|.*\|$/)
{
#Perform arithmetic and only arithmetic operations in bracketed issues on the right.
#Tricky part: don't allow potentially dangerous code, only eval if
#to-be-evaled expression is only made up of ()\d+-/%$
#Futher paranoia? use Safe module to make sure I'm good
my $exp = substr($datum->{$attrib}, 1);
chop $exp;
my @parts = split('\|', $exp, 2);
my $curr;
my $next;
my $prev;
my $retval = $parts[1];
($curr, $next, $prev) =
extract_bracketed($retval, '()', qr/[^()]*/);
unless($curr) {
$retval = $node;
$retval =~ s/$parts[0]/$parts[1]/;
}
while ($curr)
{
#my $next = $comps[0];
if ($curr =~ /^[\{\}()\-\+\/\%\*\$\d]+$/ or $curr =~ /^\(sprintf\(["'%\dcsduoxefg]+,\s*[\{\}()\-\+\/\%\*\$\d]+\)\)$/ )
{
use integer
; #We only allow integer operations, they are the ones that make sense for the application
my $value = $node;
$value =~ s/$parts[0]/$curr/ee;
$retval = $prev . $value . $next;
}
else
{
print "$curr is bad\n";
}
($curr, $next, $prev) =
extract_bracketed($retval, '()', qr/[^()]*/);
}
my $answval = $node;
$answval =~ s/$parts[0]/$retval/;
$datum->{$attrib} = $answval; #$retval;
#print Data::Dumper::Dumper(extract_bracketed($parts[1],'()',qr/[^()]*/));
#use text::balanced extract_bracketed to parse earch atom, make sure nothing but arith operators, parans, and numbers are in it to guard against code execution
}
}
}
return wantarray ? @data : $data[0];
}
#--------------------------------------------------------------------------
=head3 getNodeAttribs_nosub
Description:
Arguments:
Returns:
Globals:
Error:
Example:
Comments:
none
=cut
#--------------------------------------------------------------------------------
sub getNodeAttribs_nosub
{
my $self = shift;
my $node = shift;
my $attref = shift;
my @data;
my $datum;
my @tents;
my $return = 0;
@tents = $self->getNodeAttribs_nosub_returnany($node, $attref);
foreach my $tent (@tents) {
$datum={};
foreach (@$attref)
{
if ($tent and defined($tent->{$_}))
{
$return = 1;
$datum->{$_} = $tent->{$_};
} else { #attempt to fill in gapped attributes
unless (scalar(@$attref) <= 1) {
my $sent = $self->getNodeAttribs($node, [$_]);
if ($sent and defined($sent->{$_})) {
$return = 1;
$datum->{$_} = $sent->{$_};
}
}
}
}
push(@data,$datum);
}
if ($return)
{
return wantarray ? @data : $data[0];
}
else
{
return undef;
}
}
#--------------------------------------------------------------------------
=head3 getNodeAttribs_nosub_returnany
Description:
Arguments:
Returns:
Globals:
Error:
Example:
Comments:
none
=cut
#--------------------------------------------------------------------------------
sub getNodeAttribs_nosub_returnany
{ #This is the original function
my $self = shift;
my $node = shift;
my @attribs = @{shift()};
my @results;
#my $recurse = ((scalar(@_) == 1) ? shift : 1);
@results = $self->getAttribs({node => $node}, @attribs);
my $data = $results[0];
if (!defined($data))
{
my ($nodeghash) =
$self->{nodelist}->getAttribs({node => $node}, 'groups');
unless (defined($nodeghash) && defined($nodeghash->{groups}))
{
return undef;
}
my @nodegroups = split(/,/, $nodeghash->{groups});
my $group;
foreach $group (@nodegroups)
{
@results = $self->getAttribs({node => $group}, @attribs);
$data = $results[0];
if ($data != undef)
{
foreach (@results) {
if ($_->{node}) { $_->{node} = $node; }
};
return @results;
}
}
}
else
{
#Don't need to 'correct' node attribute, considering result of the if that governs this code block?
return @results;
}
return undef; #Made it here, config has no good answer
}
#--------------------------------------------------------------------------
=head3 getAllEntries
Description: Read entire table
Arguments:
Table handle
Returns:
Hash containing all rows in table
Globals:
Error:
Example:
my $tabh = xCAT::Table->new($table);
my $recs=$tabh->getAllEntries();
Comments:
none
=cut
#--------------------------------------------------------------------------------
sub getAllEntries
{
my $self = shift;
my @rets;
my $query = $self->{dbh}->prepare('SELECT * FROM ' . $self->{tabname});
$query->execute();
while (my $data = $query->fetchrow_hashref())
{
foreach (keys %$data)
{
if ($data->{$_} =~ /^$/)
{
$data->{$_} = undef;
}
}
push @rets, $data;
}
$query->finish();
return \@rets;
}
#--------------------------------------------------------------------------
=head3 getAllAttribsWhere
Description: Get all attributes with "where" clause
Arguments:
Database Handle
Where clause
Returns:
Array of attributes
Globals:
Error:
Example:
$nodelist->getAllAttribsWhere("groups like '%".$atom."%'",'node','group');
Comments:
none
=cut
#--------------------------------------------------------------------------------
sub getAllAttribsWhere
{
#Takes a list of attributes, returns all records in the table.
my $self = shift;
my $whereclause = shift;
my @attribs = @_;
my @results = ();
my $query =
$self->{dbh}->prepare('SELECT * FROM '
. $self->{tabname}
. ' WHERE ('
. $whereclause
. ") and (\"disable\" is NULL or \"disable\" in ('0','no','NO','no'))");
$query->execute();
while (my $data = $query->fetchrow_hashref())
{
my %newrow = ();
foreach (@attribs)
{
unless ($data->{$_} =~ /^$/ || !defined($data->{$_}))
{ #The reason we do this is to undef fields in rows that may still be returned..
$newrow{$_} = $data->{$_};
}
}
if (keys %newrow)
{
push(@results, \%newrow);
}
}
$query->finish();
return @results;
}
#--------------------------------------------------------------------------
=head3 getAllNodeAttribs
Description: Get all the node attributes values for the input table on the
attribute list
Arguments:
Table handle
Attribute list
Returns:
Array of attribute values
Globals:
Error:
Example:
my @entries = $self->{switchtab}->getAllNodeAttribs(['port','switch']);
Comments:
none
=cut
#--------------------------------------------------------------------------------
sub getAllNodeAttribs
{
#Extract and substitute every node record, expanding groups and substituting as getNodeAttribs does
my $self = shift;
my $attribq = shift;
my @results = ();
my %donenodes
; #Remember those that have been done once to not return same node multiple times
my $query =
$self->{dbh}->prepare('SELECT node FROM '
. $self->{tabname}
. " WHERE \"disable\" is NULL or \"disable\" in ('','0','no','NO','no')");
$query->execute();
xCAT::NodeRange::retain_cache(1);
$self->{_use_cache} = 0;
$self->{nodelist}->{_use_cache}=0;
$self->_build_cache($attribq);
$self->{nodelist}->_build_cache(['node','groups']);
$self->{_use_cache} = 1;
$self->{nodelist}->{_use_cache}=1;
while (my $data = $query->fetchrow_hashref())
{
unless ($data->{node} =~ /^$/ || !defined($data->{node}))
{ #ignore records without node attrib, not possible?
my @nodes =
xCAT::NodeRange::noderange($data->{node})
; #expand node entry, to make groups expand
#my $localhash = $self->getNodesAttribs(\@nodes,$attribq); #NOTE: This is stupid, rebuilds the cache for every entry, FIXME
foreach (@nodes)
{
if ($donenodes{$_}) { next; }
my $attrs;
my $nde = $_;
#if ($self->{giveand}) { #software requests each attribute be independently inherited
# foreach (@attribs) {
# my $attr = $self->getNodeAttribs($nde,$_);
# $attrs->{$_}=$attr->{$_};
# }
#} else {
my @attrs =
$self->getNodeAttribs($_, $attribq);#@{$localhash->{$_}} #$self->getNodeAttribs($_, $attribq)
; #Logic moves to getNodeAttribs
#}
#populate node attribute by default, this sort of expansion essentially requires it.
#$attrs->{node} = $_;
foreach my $att (@attrs) {
$att->{node} = $_;
}
$donenodes{$_} = 1;
push @results, @attrs; #$self->getNodeAttribs($_,@attribs);
}
}
}
$self->{_use_cache} = 0;
$self->{nodelist}->{_use_cache} = 0;
xCAT::NodeRange::retain_cache(0);
$query->finish();
return @results;
}
#--------------------------------------------------------------------------
=head3 getAllAttribs
Description: Returns a list of records in the input table for the input
list of attributes.
Arguments:
Table handle
List of attributes
Returns:
Array of attribute values
Globals:
Error:
Example:
$nodelisttab = xCAT::Table->new("nodelist");
my @attribs = ("node");
@nodes = $nodelisttab->getAllAttribs(@attribs);
Comments:
none
=cut
#--------------------------------------------------------------------------------
sub getAllAttribs
{
#Takes a list of attributes, returns all records in the table.
my $self = shift;
#print "Being asked to dump ".$self->{tabname}."for something\n";
my @attribs = @_;
my @results = ();
if ($self->{_use_cache}) {
my @results;
my $cacheline;
CACHELINE: foreach $cacheline (@{$self->{_tablecache}}) {
my $attrib;
my %rethash;
foreach $attrib (@attribs)
{
unless ($cacheline->{$attrib} =~ /^$/ || !defined($cacheline->{$attrib}))
{ #To undef fields in rows that may still be returned
$rethash{$attrib} = $cacheline->{$attrib};
}
}
if (keys %rethash)
{
push @results, \%rethash;
}
}
if (@results)
{
return @results; #return wantarray ? @results : $results[0];
}
return undef;
}
my $query =
$self->{dbh}->prepare('SELECT * FROM '
. $self->{tabname}
. " WHERE \"disable\" is NULL or \"disable\" in ('','0','no','NO','no')");
$query->execute();
while (my $data = $query->fetchrow_hashref())
{
my %newrow = ();
foreach (@attribs)
{
unless ($data->{$_} =~ /^$/ || !defined($data->{$_}))
{ #The reason we do this is to undef fields in rows that may still be returned..
$newrow{$_} = $data->{$_};
}
}
if (keys %newrow)
{
push(@results, \%newrow);
}
}
$query->finish();
return @results;
}
#--------------------------------------------------------------------------
=head3 delEntries
Description: Delete table entries
Arguments:
Table Handle
Entry to delete
Returns:
Globals:
Error:
Example:
my $table=xCAT::Table->new("notification", -create => 1,-autocommit => 0);
my %key_col = (filename=>$fname);
$table->delEntries(\%key_col);
$table->commit;
Comments:
none
=cut
#--------------------------------------------------------------------------------
sub delEntries
{
my $self = shift;
my $keyref = shift;
my %keypairs;
if ($keyref)
{
%keypairs = %{$keyref};
}
my $notif = xCAT::NotifHandler->needToNotify($self->{tabname}, 'd');
my @notif_data;
if ($notif == 1)
{
my $qstring = "SELECT * FROM " . $self->{tabname};
if ($keyref) { $qstring .= " WHERE "; }
my @qargs = ();
foreach (keys %keypairs)
{
$qstring .= "$_ = ? AND ";
push @qargs, $keypairs{$_};
}
$qstring =~ s/ AND \z//;
my $query = $self->{dbh}->prepare($qstring);
$query->execute(@qargs);
#prepare the notification data
#put the column names at the very front
push(@notif_data, $query->{NAME});
my $temp_data = $query->fetchall_arrayref();
foreach (@$temp_data)
{
push(@notif_data, $_);
}
$query->finish();
}
my @stargs = ();
my $delstring = 'DELETE FROM ' . $self->{tabname};
if ($keyref) { $delstring .= ' WHERE '; }
foreach (keys %keypairs)
{
$delstring .= $_ . ' = ? AND ';
if (ref($keypairs{$_}))
{ #XML transformed data may come in mangled unreasonably into listrefs
push @stargs, $keypairs{$_}->[0];
}
else
{
push @stargs, $keypairs{$_};
}
}
$delstring =~ s/ AND \z//;
my $stmt = $self->{dbh}->prepare($delstring);
$stmt->execute(@stargs);
$stmt->finish;
#notify the interested parties
if ($notif == 1)
{
xCAT::NotifHandler->notify("d", $self->{tabname}, \@notif_data,
{});
}
}
#--------------------------------------------------------------------------
=head3 getAttribs
Description:
Arguments:
key
List of attributes
Returns:
Hash of requested attributes
Globals:
Error:
Example:
$table = xCAT::Table->new('passwd');
@tmp=$table->getAttribs({'key'=>'ipmi'},('username','password');
Comments:
none
=cut
#--------------------------------------------------------------------------------
sub getAttribs
{
#Takes two arguments:
#-Node name (will be compared against the 'Node' column)
#-List reference of attributes for which calling code wants at least one of defined
# (recurse argument intended only for internal use.)
# Returns a hash reference with requested attributes defined.
my $self = shift;
#my $key = shift;
#my $keyval = shift;
my %keypairs = %{shift()};
my @attribs;
if (ref $_[0]) {
@attribs = @{shift()};
} else {
@attribs = @_;
}
my @return;
if ($self->{_use_cache}) {
my @results;
my $cacheline;
if (scalar(keys %keypairs) == 1 and $keypairs{node}) { #99.9% of queries look like this, optimized case
foreach $cacheline (@{$self->{_nodecache}->{$keypairs{node}}}) {
my $attrib;
my %rethash;
foreach $attrib (@attribs)
{
unless ($cacheline->{$attrib} =~ /^$/ || !defined($cacheline->{$attrib}))
{ #To undef fields in rows that may still be returned
$rethash{$attrib} = $cacheline->{$attrib};
}
}
if (keys %rethash)
{
push @results, \%rethash;
}
}
} else { #SLOW WAY FOR GENERIC CASE
CACHELINE: foreach $cacheline (@{$self->{_tablecache}}) {
foreach (keys %keypairs) {
if (not $keypairs{$_} and $keypairs{$_} ne 0 and $cacheline->{$_}) {
next CACHELINE;
}
unless ($keypairs{$_} eq $cacheline->{$_}) {
next CACHELINE;
}
}
my $attrib;
my %rethash;
foreach $attrib (@attribs)
{
unless ($cacheline->{$attrib} =~ /^$/ || !defined($cacheline->{$attrib}))
{ #To undef fields in rows that may still be returned
$rethash{$attrib} = $cacheline->{$attrib};
}
}
if (keys %rethash)
{
push @results, \%rethash;
}
}
}
if (@results)
{
return wantarray ? @results : $results[0];
}
return undef;
}
#print "Uncached access to ".$self->{tabname}."\n";
my $statement = 'SELECT * FROM ' . $self->{tabname} . ' WHERE ';
my @exeargs;
foreach (keys %keypairs)
{
if ($keypairs{$_})
{
$statement .= "\"".$_ . "\" = ? and ";
if (ref($keypairs{$_}))
{ #correct for XML process mangling if occurred
push @exeargs, $keypairs{$_}->[0];
}
else
{
push @exeargs, $keypairs{$_};
}
}
else
{
$statement .= "\"$_\" is NULL and ";
}
}
$statement .= "(\"disable\" is NULL or \"disable\" in ('0','no','NO','No','nO'))";
my $query = $self->{dbh}->prepare($statement);
unless (defined $query) {
return undef;
}
$query->execute(@exeargs);
my $data;
while ($data = $query->fetchrow_hashref())
{
my $attrib;
my %rethash;
foreach $attrib (@attribs)
{
unless ($data->{$attrib} =~ /^$/ || !defined($data->{$attrib}))
{ #To undef fields in rows that may still be returned
$rethash{$attrib} = $data->{$attrib};
}
}
if (keys %rethash)
{
push @return, \%rethash;
}
}
$query->finish();
if (@return)
{
return wantarray ? @return : $return[0];
}
return undef;
}
#--------------------------------------------------------------------------
=head3 getTable
Description: Read entire Table
Arguments:
Table Handle
Returns:
Array of table rows
Globals:
Error:
Example:
my $table=xCAT::Table->new("notification", -create =>0);
my @row_array= $table->getTable;
Comments:
none
=cut
#--------------------------------------------------------------------------------
sub getTable
{
# Get contents of table
# Takes no arguments
# Returns an array of hashes containing the entire contents of this
# table. Each array entry contains a pointer to a hash which is
# one row of the table. The row hash is keyed by attribute name.
my $self = shift;
my @return;
my $statement = 'SELECT * FROM ' . $self->{tabname};
my $query = $self->{dbh}->prepare($statement);
$query->execute();
my $data;
while ($data = $query->fetchrow_hashref())
{
my $attrib;
my %rethash;
foreach $attrib (keys %{$data})
{
$rethash{$attrib} = $data->{$attrib};
}
if (keys %rethash)
{
push @return, \%rethash;
}
}
$query->finish();
if (@return)
{
return @return;
}
return undef;
}
#--------------------------------------------------------------------------
=head3 close
Description: Close out Table transaction
Arguments:
Table Handle
Returns:
Globals:
Error:
Example:
my $mactab = xCAT::Table->new('mac');
$mactab->setNodeAttribs($macmap{$mac},{mac=>$mac});
$mactab->close();
Comments:
none
=cut
#--------------------------------------------------------------------------------
sub close
{
my $self = shift;
#if ($self->{dbh}) { $self->{dbh}->disconnect(); }
#undef $self->{dbh};
if ($self->{tabname} eq 'nodelist') {
undef $self->{nodelist};
} else {
$self->{nodelist}->close();
}
}
#--------------------------------------------------------------------------
=head3 open
Description: Connect to Database
Arguments:
Empty Hash
Returns:
Data Base Handle
Globals:
Error:
Example:
Comments:
none
=cut
#--------------------------------------------------------------------------------
sub open
{
my $self = shift;
$self->{dbh} = DBI->connect($self->{connstring}, "", "");
}
#--------------------------------------------------------------------------
=head3 DESTROY
Description: Disconnect from Database
Arguments:
Database Handle
Returns:
Globals:
Error:
Example:
Comments:
none
=cut
#--------------------------------------------------------------------------------
sub DESTROY
{
my $self = shift;
$self->{dbh} = '';
undef $self->{dbh};
#if ($self->{dbh}) { $self->{dbh}->disconnect(); undef $self->{dbh};}
undef $self->{nodelist}; #Could be circular
}
=head3 getTableList
Description: Returns a list of the table names in the xCAT database.
=cut
sub getTableList { return keys %xCAT::Schema::tabspec; }
=head3 getTableSchema
Description: Returns the db schema for the specified table.
Returns: A reference to a hash that contains the cols, keys, etc. for this table. (See Schema.pm for details.)
=cut
sub getTableSchema { return $xCAT::Schema::tabspec{$_[1]}; }
=head3 getTableList
Description: Returns a summary description for each table.
Returns: A reference to a hash. Each key is the table name.
Each value is the table description.
=cut
sub getDescriptions {
my $classname = shift; # we ignore this because this function is static
# List each table name and the value for table_desc.
my $ret = {};
#my @a = keys %{$xCAT::Schema::tabspec{nodelist}}; print 'a=', @a, "\n";
foreach my $t (keys %xCAT::Schema::tabspec) { $ret->{$t} = $xCAT::Schema::tabspec{$t}->{table_desc}; }
return $ret;
}
1;
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