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<?php
/**
* IBM_DB2-specific installer.
*
* @file
* @ingroup Deployment
*/
/**
* Class for setting up the MediaWiki database using IBM_DB2.
*
* @ingroup Deployment
* @since 1.17
*/
class Ibm_db2Installer extends DatabaseInstaller {
protected $globalNames = array(
'wgDBserver',
'wgDBport',
'wgDBname',
'wgDBuser',
'wgDBpassword',
'wgDBmwschema',
);
protected $internalDefaults = array(
'_InstallUser' => 'db2admin'
);
/**
* Get the DB2 database extension name
* @return string
*/
public function getName(){
return 'ibm_db2';
}
/**
* Determine whether the DB2 database extension is currently available in PHP
* @return boolean
*/
public function isCompiled() {
return self::checkExtension( 'ibm_db2' );
}
/**
* Generate a connection form for a DB2 database
* @return string
*/
public function getConnectForm() {
return
$this->getTextBox( 'wgDBserver', 'config-db-host', array(), $this->parent->getHelpBox( 'config-db-host-help' ) ) .
$this->getTextBox( 'wgDBport', 'config-db-port', array(), $this->parent->getHelpBox( 'config-db-port' ) ) .
Html::openElement( 'fieldset' ) .
Html::element( 'legend', array(), wfMsg( 'config-db-wiki-settings' ) ) .
$this->getTextBox( 'wgDBname', 'config-db-name', array(), $this->parent->getHelpBox( 'config-db-name-help' ) ) .
$this->getTextBox( 'wgDBmwschema', 'config-db-schema', array(), $this->parent->getHelpBox( 'config-db-schema-help' ) ) .
Html::closeElement( 'fieldset' ) .
$this->getInstallUserBox();
}
/**
* Validate and then execute the connection form for a DB2 database
* @return Status
*/
public function submitConnectForm() {
// Get variables from the request
$newValues = $this->setVarsFromRequest(
array( 'wgDBserver', 'wgDBport', 'wgDBname',
'wgDBmwschema', 'wgDBuser', 'wgDBpassword' ) );
// Validate them
$status = Status::newGood();
if ( !strlen( $newValues['wgDBname'] ) ) {
$status->fatal( 'config-missing-db-name' );
} elseif ( !preg_match( '/^[a-zA-Z0-9_]+$/', $newValues['wgDBname'] ) ) {
$status->fatal( 'config-invalid-db-name', $newValues['wgDBname'] );
}
if ( !strlen( $newValues['wgDBmwschema'] ) ) {
$status->fatal( 'config-invalid-schema' );
}
elseif ( !preg_match( '/^[a-zA-Z0-9_]*$/', $newValues['wgDBmwschema'] ) ) {
$status->fatal( 'config-invalid-schema', $newValues['wgDBmwschema'] );
}
if ( !strlen( $newValues['wgDBport'] ) ) {
$status->fatal( 'config-invalid-port' );
}
elseif ( !preg_match( '/^[0-9_]*$/', $newValues['wgDBport'] ) ) {
$status->fatal( 'config-invalid-port', $newValues['wgDBport'] );
}
// Submit user box
if ( $status->isOK() ) {
$status->merge( $this->submitInstallUserBox() );
}
if ( !$status->isOK() ) {
return $status;
}
global $wgDBport;
$wgDBport = $newValues['wgDBport'];
// Try to connect
$status->merge( $this->getConnection() );
if ( !$status->isOK() ) {
return $status;
}
$this->parent->setVar( 'wgDBuser', $this->getVar( '_InstallUser' ) );
$this->parent->setVar( 'wgDBpassword', $this->getVar( '_InstallPassword' ) );
return $status;
}
/**
* Open a DB2 database connection
* @return Status
*/
public function openConnection() {
$status = Status::newGood();
try {
$db = new DatabaseIbm_db2(
$this->getVar( 'wgDBserver' ),
$this->getVar( '_InstallUser' ),
$this->getVar( '_InstallPassword' ),
$this->getVar( 'wgDBname' ),
0,
$this->getVar( 'wgDBmwschema' )
);
$status->value = $db;
} catch ( DBConnectionError $e ) {
$status->fatal( 'config-connection-error', $e->getMessage() );
}
return $status;
}
/**
* Create a DB2 database for MediaWiki
* @return Status
*/
public function setupDatabase() {
$status = $this->getConnection();
if ( !$status->isOK() ) {
return $status;
}
$conn = $status->value;
$dbName = $this->getVar( 'wgDBname' );
if( !$conn->selectDB( $dbName ) ) {
$conn->query( "CREATE DATABASE "
. $conn->addIdentifierQuotes( $dbName )
. " AUTOMATIC STORAGE YES"
. " USING CODESET UTF-8 TERRITORY US COLLATE USING SYSTEM"
. " PAGESIZE 32768", __METHOD__ );
$conn->selectDB( $dbName );
}
$this->setupSchemaVars();
return $status;
}
/**
* Create tables from scratch.
* First check if pagesize >= 32k.
*
* @return Status
*/
public function createTables() {
$status = $this->getConnection();
if ( !$status->isOK() ) {
return $status;
}
$this->db->selectDB( $this->getVar( 'wgDBname' ) );
if( $this->db->tableExists( 'user' ) ) {
$status->warning( 'config-install-tables-exist' );
return $status;
}
/* Check for pagesize */
$status = $this->checkPageSize();
if ( !$status->isOK() ) {
return $status;
}
$this->db->setFlag( DBO_DDLMODE ); // For Oracle's handling of schema files
$this->db->begin( __METHOD__ );
$error = $this->db->sourceFile( $this->db->getSchemaPath() );
if( $error !== true ) {
$this->db->reportQueryError( $error, 0, '', __METHOD__ );
$this->db->rollback( __METHOD__ );
$status->fatal( 'config-install-tables-failed', $error );
} else {
$this->db->commit( __METHOD__ );
}
// Resume normal operations
if( $status->isOk() ) {
$this->enableLB();
}
return $status;
}
/**
* Check if database has a tablspace with pagesize >= 32k.
*
* @return Status
*/
public function checkPageSize() {
$status = $this->getConnection();
if ( !$status->isOK() ) {
return $status;
}
$this->db->selectDB( $this->getVar( 'wgDBname' ) );
try {
$result = $this->db->query( 'SELECT PAGESIZE FROM SYSCAT.TABLESPACES' );
if( $result == false ) {
$status->fatal( 'config-connection-error', '' );
}
else {
while ( $row = $this->db->fetchRow( $result ) ) {
if( $row[0] >= 32768 ) {
return $status;
}
}
$status->fatal( 'config-ibm_db2-low-db-pagesize', '' );
}
} catch ( DBUnexpectedError $e ) {
$status->fatal( 'config-connection-error', $e->getMessage() );
}
return $status;
}
/**
* Generate the code to store the DB2-specific settings defined by the configuration form
* @return string
*/
public function getLocalSettings() {
$schema = LocalSettingsGenerator::escapePhpString( $this->getVar( 'wgDBmwschema' ) );
$port = LocalSettingsGenerator::escapePhpString( $this->getVar( 'wgDBport' ) );
return
"# IBM_DB2 specific settings
\$wgDBmwschema = \"{$schema}\";
\$wgDBport = \"{$port}\";";
}
public function __construct($parent) {
parent::__construct($parent);
}
}
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