PHP abort_all_db_transactions函数代码示例

/**
 * Default exception handler, uncaught exceptions are equivalent to error() in 1.9 and earlier
 *
 * @param Exception $ex
 * @return void -does not return. Terminates execution!
 */
function default_exception_handler($ex)
{
    global $CFG, $DB, $OUTPUT, $USER, $FULLME, $SESSION, $PAGE;
    // detect active db transactions, rollback and log as error
    abort_all_db_transactions();
    if ($ex instanceof required_capability_exception && !CLI_SCRIPT && !AJAX_SCRIPT && !empty($CFG->autologinguests) && !empty($USER->autologinguest)) {
        $SESSION->wantsurl = qualified_me();
        redirect(get_login_url());
    }
    $info = get_exception_info($ex);
    if (debugging('', DEBUG_MINIMAL)) {
        $logerrmsg = "Default exception handler: " . $info->message . ' Debug: ' . $info->debuginfo . "\n" . format_backtrace($info->backtrace, true);
        error_log($logerrmsg);
    }
    if (is_early_init($info->backtrace)) {
        echo bootstrap_renderer::early_error($info->message, $info->moreinfourl, $info->link, $info->backtrace, $info->debuginfo, $info->errorcode);
    } else {
        try {
            if ($DB) {
                // If you enable db debugging and exception is thrown, the print footer prints a lot of rubbish
                $DB->set_debug(0);
            }
            echo $OUTPUT->fatal_error($info->message, $info->moreinfourl, $info->link, $info->backtrace, $info->debuginfo);
        } catch (Exception $out_ex) {
            // default exception handler MUST not throw any exceptions!!
            // the problem here is we do not know if page already started or not, we only know that somebody messed up in outputlib or theme
            // so we just print at least something instead of "Exception thrown without a stack frame in Unknown on line 0":-(
            if (CLI_SCRIPT or AJAX_SCRIPT) {
                // just ignore the error and send something back using the safest method
                echo bootstrap_renderer::early_error($info->message, $info->moreinfourl, $info->link, $info->backtrace, $info->debuginfo, $info->errorcode);
            } else {
                echo bootstrap_renderer::early_error_content($info->message, $info->moreinfourl, $info->link, $info->backtrace, $info->debuginfo);
                $outinfo = get_exception_info($out_ex);
                echo bootstrap_renderer::early_error_content($outinfo->message, $outinfo->moreinfourl, $outinfo->link, $outinfo->backtrace, $outinfo->debuginfo);
            }
        }
    }
    exit(1);
    // General error code
}

/**
 * upgrade logging functions
 */
function upgrade_handle_exception($ex, $plugin = null) {
    global $CFG;

    // rollback everything, we need to log all upgrade problems
    abort_all_db_transactions();

    $info = get_exception_info($ex);

    // First log upgrade error
    upgrade_log(UPGRADE_LOG_ERROR, $plugin, 'Exception: ' . get_class($ex), $info->message, $info->backtrace);

    // Always turn on debugging - admins need to know what is going on
    set_debugging(DEBUG_DEVELOPER, true);

    default_exception_handler($ex, true, $plugin);
}

 /**
  * Specialised exception handler, we can not use the standard one because
  * it can not just print html to output.
  *
  * @param exception $ex
  * $uses exit
  */
 public function exception_handler($ex)
 {
     // detect active db transactions, rollback and log as error
     abort_all_db_transactions();
     // some hacks might need a cleanup hook
     $this->session_cleanup($ex);
     // now let the plugin send the exception to client
     $this->send_error($ex);
     // not much else we can do now, add some logging later
     exit(1);
 }

function RWSEHdlr($r_ex)
{
    abort_all_db_transactions();
    $r_inf = get_exception_info($r_ex);
    $r_msg = "\r\n-- Exception occurred --";
    $r_msg .= "\r\nmessage: {$r_inf->message}";
    $r_msg .= "\r\nerrorcode: {$r_inf->errorcode}";
    $r_msg .= "\r\nfile: " . $r_ex->getFile();
    $r_msg .= "\r\nline: " . $r_ex->getLine();
    $r_msg .= "\r\nlink: {$r_inf->link}";
    $r_msg .= "\r\nmoreinfourl: {$r_inf->moreinfourl}";
    $r_msg .= "\r\na: {$r_inf->a}";
    $r_msg .= "\r\ndebuginfo: {$r_inf->debuginfo}\r\n";
    RWSELog($r_msg);
    RWSELog("\r\nstacktrace: " . $r_ex->getTraceAsString());
    RWSSErr("2112,{$r_inf->errorcode}");
}

 /**
  * Adds and upgrades the selected plugins
  *
  * @param array $ingredients
  * @param string $path Path to the ingredient type file system
  * @param SimpleXMLElement $xml
  * @return array Problems during the ingredients deployment
  */
 public function deploy_ingredients($ingredients, $path, SimpleXMLElement $xml)
 {
     // Using the $ingredients array keys to maintain coherence with the main deployment method
     $problems = array();
     $pluginman = plugin_manager::instance();
     $plugintypespaths = get_plugin_types();
     $this->get_flavour_info($xml);
     foreach ($ingredients as $selection) {
         // [0] => ingredienttype, [1] => ingredientname
         $ingredientdata = explode('/', $selection);
         $type = $ingredientdata[0];
         $ingredient = $ingredientdata[1];
         if (empty($this->branches[$type]->branches[$ingredient])) {
             $problems[$selection]['pluginnotfound'] = $selection;
             continue;
         }
         $ingredientdata = $this->branches[$type]->branches[$ingredient];
         // Adapter to the restrictions array
         if (!empty($ingredientdata->restrictions)) {
             $problems[$selection] = $ingredientdata->restrictions;
             continue;
         }
         if (empty($xml->{$type}) || empty($xml->{$type}->{$ingredient})) {
             $problems[$selection]['pluginnotfound'] = $selection;
             continue;
         }
         // Deploy then
         $ingredientpath = $plugintypespaths[$type] . '/' . $ingredient;
         // Remove old dir if present
         if (file_exists($ingredientpath)) {
             // Report if the old plugin directory can't be removed
             if (!$this->unlink($ingredientpath)) {
                 $problems[$selection]['plugincantremove'] = $selection;
                 continue;
             }
         }
         // Copy the new contents where the flavour says
         $tmppath = $path . '/' . $xml->{$type}->{$ingredient}->path;
         if (!$this->copy($tmppath, $ingredientpath)) {
             debugging('From : ' . $tmppath . ' To: ' . $ingredientpath);
             $problems[$selection]['plugincopyerror'] = $selection;
         }
     }
     // Execute the moodle upgrade process
     try {
         foreach ($plugintypespaths as $type => $location) {
             upgrade_plugins($type, 'flavours_print_upgrade_void', 'flavours_print_upgrade_void', false);
         }
     } catch (Exception $ex) {
         abort_all_db_transactions();
         $info = get_exception_info($ex);
         upgrade_log(UPGRADE_LOG_ERROR, $ex->module, 'Exception: ' . get_class($ex), $info->message, $info->backtrace);
     }
     return $problems;
 }

function lockdownbrowser_MonitorExceptionHandler($ex)
{
    abort_all_db_transactions();
    $info = get_exception_info($ex);
    $msg = "\r\n-- Exception occurred --" . "\r\nmessage: {$info->message}" . "\r\nerrorcode: {$info->errorcode}" . "\r\nbacktrace: {$info->backtrace}" . "\r\nlink: {$info->link}" . "\r\nmoreinfourl: {$info->moreinfourl}" . "\r\na: {$info->a}" . "\r\ndebuginfo: {$info->debuginfo}\r\n";
    lockdownbrowser_MonitorLog($msg);
    lockdownbrowser_MonitorLog("\r\nstacktrace: " . $ex->getTraceAsString());
    lockdownbrowser_MonitorServiceError(2003, "A Moodle or PHP server exception occurred: {$info->errorcode}");
}