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Connection.php
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Connection.php
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<?php
/**
* Zend Framework (http://framework.zend.com/)
*
* @link http://github.com/zendframework/zf2 for the canonical source repository
* @copyright Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
namespace Zend\Db\Adapter\Driver\IbmDb2;
use Zend\Db\Adapter\Driver\AbstractConnection;
use Zend\Db\Adapter\Exception;
class Connection extends AbstractConnection
{
/**
* @var IbmDb2
*/
protected $driver = null;
/**
* i5 OS
*
* @var bool
*/
protected $i5;
/**
* Previous autocommit set
*
* @var mixed
*/
protected $prevAutocommit;
/**
* Constructor
*
* @param array|resource|null $connectionParameters (ibm_db2 connection resource)
* @throws Exception\InvalidArgumentException
*/
public function __construct($connectionParameters = null)
{
if (is_array($connectionParameters)) {
$this->setConnectionParameters($connectionParameters);
} elseif (is_resource($connectionParameters)) {
$this->setResource($connectionParameters);
} elseif (null !== $connectionParameters) {
throw new Exception\InvalidArgumentException(
'$connection must be an array of parameters, a db2 connection resource or null'
);
}
}
/**
* Set driver
*
* @param IbmDb2 $driver
* @return self
*/
public function setDriver(IbmDb2 $driver)
{
$this->driver = $driver;
return $this;
}
/**
* @param resource $resource DB2 resource
* @return self
*/
public function setResource($resource)
{
if (!is_resource($resource) || get_resource_type($resource) !== 'DB2 Connection') {
throw new Exception\InvalidArgumentException('The resource provided must be of type "DB2 Connection"');
}
$this->resource = $resource;
return $this;
}
/**
* {@inheritDoc}
*/
public function getCurrentSchema()
{
if (!$this->isConnected()) {
$this->connect();
}
$info = db2_server_info($this->resource);
return (isset($info->DB_NAME) ? $info->DB_NAME : '');
}
/**
* {@inheritDoc}
*/
public function connect()
{
if (is_resource($this->resource)) {
return $this;
}
// localize
$p = $this->connectionParameters;
// given a list of key names, test for existence in $p
$findParameterValue = function (array $names) use ($p) {
foreach ($names as $name) {
if (isset($p[$name])) {
return $p[$name];
}
}
return;
};
$database = $findParameterValue(['database', 'db']);
$username = $findParameterValue(['username', 'uid', 'UID']);
$password = $findParameterValue(['password', 'pwd', 'PWD']);
$isPersistent = $findParameterValue(['persistent', 'PERSISTENT', 'Persistent']);
$options = (isset($p['driver_options']) ? $p['driver_options'] : []);
$connect = ((bool) $isPersistent) ? 'db2_pconnect' : 'db2_connect';
$this->resource = $connect($database, $username, $password, $options);
if ($this->resource === false) {
throw new Exception\RuntimeException(sprintf(
'%s: Unable to connect to database',
__METHOD__
));
}
return $this;
}
/**
* {@inheritDoc}
*/
public function isConnected()
{
return ($this->resource !== null);
}
/**
* {@inheritDoc}
*/
public function disconnect()
{
if ($this->resource) {
db2_close($this->resource);
$this->resource = null;
}
return $this;
}
/**
* {@inheritDoc}
*/
public function beginTransaction()
{
if ($this->isI5() && !ini_get('ibm_db2.i5_allow_commit')) {
throw new Exception\RuntimeException(
'DB2 transactions are not enabled, you need to set the ibm_db2.i5_allow_commit=1 in your php.ini'
);
}
if (!$this->isConnected()) {
$this->connect();
}
$this->prevAutocommit = db2_autocommit($this->resource);
db2_autocommit($this->resource, DB2_AUTOCOMMIT_OFF);
$this->inTransaction = true;
return $this;
}
/**
* {@inheritDoc}
*/
public function commit()
{
if (!$this->isConnected()) {
$this->connect();
}
if (!db2_commit($this->resource)) {
throw new Exception\RuntimeException("The commit has not been successful");
}
if ($this->prevAutocommit) {
db2_autocommit($this->resource, $this->prevAutocommit);
}
$this->inTransaction = false;
return $this;
}
/**
* Rollback
*
* @return Connection
*/
public function rollback()
{
if (!$this->isConnected()) {
throw new Exception\RuntimeException('Must be connected before you can rollback.');
}
if (!$this->inTransaction()) {
throw new Exception\RuntimeException('Must call beginTransaction() before you can rollback.');
}
if (!db2_rollback($this->resource)) {
throw new Exception\RuntimeException('The rollback has not been successful');
}
if ($this->prevAutocommit) {
db2_autocommit($this->resource, $this->prevAutocommit);
}
$this->inTransaction = false;
return $this;
}
/**
* {@inheritDoc}
*/
public function execute($sql)
{
if (!$this->isConnected()) {
$this->connect();
}
if ($this->profiler) {
$this->profiler->profilerStart($sql);
}
set_error_handler(function () {}, E_WARNING); // suppress warnings
$resultResource = db2_exec($this->resource, $sql);
restore_error_handler();
if ($this->profiler) {
$this->profiler->profilerFinish($sql);
}
// if the returnValue is something other than a pg result resource, bypass wrapping it
if ($resultResource === false) {
throw new Exception\InvalidQueryException(db2_stmt_errormsg());
}
return $this->driver->createResult(($resultResource === true) ? $this->resource : $resultResource);
}
/**
* {@inheritDoc}
*/
public function getLastGeneratedValue($name = null)
{
return db2_last_insert_id($this->resource);
}
/**
* Determine if the OS is OS400 (AS400, IBM i)
*
* @return bool
*/
protected function isI5()
{
if (isset($this->i5)) {
return $this->i5;
}
$this->i5 = (php_uname('s') == 'OS400');
return $this->i5;
}
}