ilECSEventQueueReader Class Reference

Reads ECS events and stores them in the database. More...

Collaboration diagram for ilECSEventQueueReader:

Public Member Functions
	__construct ()
	Constructor.
	getEvents ()
	get all events
	deleteAll ()
	Delete all events.
	deleteAllEContentEvents ()
	Delete all econtents.
	deleteAllExportedEvents ()
	Delete all exported events.
	refresh ()
	Fetch events from ECS server.
	shift ()
	get and delete the first event entry
	add ($a_type, $a_id, $a_op)
	add
	read ()
	Read public.

Static Public Member Functions
static	handleImportReset ()
	handle admin reset
static	handleExportReset ()
	Handle export reset.

Data Fields
const	TYPE_ECONTENT = 'econtents'
const	TYPE_EXPORTED = 'exported'
const	OPERATION_DELETE = 'delete'
const	OPERATION_UPDATE = 'update'
const	OPERATION_CREATE = 'create'
const	OPERATION_NEWLY_CREATED = 'newly-created'
const	ADMIN_RESET = 'reset'
const	ADMIN_RESET_ALL = 'reset_all'

Protected Attributes
	$log
	$db
	$events = array()
	$econtent_ids = array()

Private Member Functions
	update ($a_type, $a_id, $a_operation)
	update one entry
	delete ($a_event_id)
	delete private

Detailed Description

Reads ECS events and stores them in the database.

Author

Stefan Meyer smeye.nosp@m.r@da.nosp@m.tabay.nosp@m..de

Version

$Id$

Definition at line 34 of file class.ilECSEventQueueReader.php.

Constructor & Destructor Documentation

ilECSEventQueueReader::__construct

(

)

Constructor.

public

Definition at line 58 of file class.ilECSEventQueueReader.php.

References $ilDB, $ilLog, ilECSSettings\_getInstance(), and read().

        {
                global $ilLog,$ilDB;
                
                include_once('Services/WebServices/ECS/classes/class.ilECSSettings.php');
                include_once('Services/WebServices/ECS/classes/class.ilECSReaderException.php');
                
                $this->settings = ilECSSettings::_getInstance();
                $this->log = $ilLog;
                $this->db = $ilDB;
                
                $this->read();
        }

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Member Function Documentation

ilECSEventQueueReader::add	(		$a_type,
			$a_id,
			$a_op
	)

add

public

Definition at line 355 of file class.ilECSEventQueueReader.php.

References $ilDB, $query, and $res.

Referenced by refresh().

        {
                global $ilDB;

                $next_id = $ilDB->nextId('ecs_events');
                $query = "INSERT INTO ecs_events (event_id,type,id,op) ".
                        "VALUES (".
                        $ilDB->quote($next_id,'integer').", ".
                        $this->db->quote($a_type,'text').", ".
                        $this->db->quote($a_id,'integer').", ".
                        $this->db->quote($a_op,'text')." ".
                        ")";
                $res = $ilDB->manipulate($query);
                
                $new_event['event_id'] = $next_id;
                $new_event['type'] = $a_type;
                $new_event['id'] = $a_id;
                $new_event['op'] = $a_op;
                
                $this->events[] = $new_event;
                $this->econtent_ids[$a_id] = $a_id;
                return true;
        }

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ilECSEventQueueReader::delete (   $a_event_id )

private

delete private

Parameters

int

event id

Definition at line 402 of file class.ilECSEventQueueReader.php.

References $ilDB, $query, and $res.

        {
                global $ilDB;
                
                $query = "DELETE FROM ecs_events ".
                        "WHERE event_id = ".$this->db->quote($a_event_id,'integer')." ";
                $res = $ilDB->manipulate($query);
                unset($this->econtent_ids[$a_event_id]);
                return true;
        }

ilECSEventQueueReader::deleteAll

(

)

Delete all events.

public

Definition at line 203 of file class.ilECSEventQueueReader.php.

References $ilDB, $query, and $res.

        {
                global $ilDB;
                
                $query = "DELETE FROM ecs_events";
                $res = $ilDB->manipulate($query);
                return true;
        }

ilECSEventQueueReader::deleteAllEContentEvents

(

)

Delete all econtents.

public

Definition at line 217 of file class.ilECSEventQueueReader.php.

References $ilDB, $query, and $res.

        {
                global $ilDB;
                
                $query = "DELETE FROM ecs_events ".
                        "WHERE type = ".$this->db->quote(self::TYPE_ECONTENT,'text');
                $res = $ilDB->manipulate($query);
                return true;
        }

ilECSEventQueueReader::deleteAllExportedEvents

(

)

Delete all exported events.

public

Definition at line 232 of file class.ilECSEventQueueReader.php.

References $ilDB, $query, and $res.

        {
                global $ilDB;
                
                $query = "DELETE FROM ecs_events ".
                        "WHERE type = ".$this->db->quote(self::TYPE_EXPORTED,'text');
                $res = $ilDB->manipulate($query);
                return true;
        }

ilECSEventQueueReader::getEvents

(

)

get all events

public

Definition at line 193 of file class.ilECSEventQueueReader.php.

        {
                return $this->events ? $this->events : array();
        }

static ilECSEventQueueReader::handleExportReset ( )

static

Handle export reset.

Delete exported econtent and create it again

Returns

bool

Definition at line 171 of file class.ilECSEventQueueReader.php.

References ilECSExport\_getExportedIDs().

Referenced by refresh().

         {
                include_once('./Services/WebServices/ECS/classes/class.ilECSExport.php');
                
                $queue = new ilECSEventQueueReader();
                $queue->deleteAllExportedEvents();
                
                foreach(ilECSExport::_getExportedIDs() as $obj_id)
                {
                        $queue->add(self::TYPE_EXPORTED,$obj_id,self::OPERATION_NEWLY_CREATED);
                }
                return true;
         }

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static ilECSEventQueueReader::handleImportReset ( )

static

handle admin reset

Returns

bool

Definition at line 78 of file class.ilECSEventQueueReader.php.

References $ilLog, $null, $reader, ilECSExport\_deleteEContentIds(), ilECSExport\_getAllEContentIds(), ilECSImport\_getAllImportedLinks(), OPERATION_CREATE, OPERATION_DELETE, OPERATION_UPDATE, and TYPE_ECONTENT.

Referenced by ilECSSettingsGUI\readAll(), and refresh().

         {
                global $ilLog;
                
                include_once('Services/WebServices/ECS/classes/class.ilECSConnector.php');
                include_once('Services/WebServices/ECS/classes/class.ilECSConnectorException.php');

                try
                {
                        include_once('./Services/WebServices/ECS/classes/class.ilECSEContentReader.php');
                        include_once('./Services/WebServices/ECS/classes/class.ilECSEventQueueReader.php');
                        include_once('./Services/WebServices/ECS/classes/class.ilECSImport.php');
                        include_once('./Services/WebServices/ECS/classes/class.ilECSExport.php');
                        
                        $event_queue = new ilECSEventQueueReader();
                        $event_queue->deleteAllEContentEvents();
                        
                        $reader = new ilECSEContentReader();
                        $reader->read();
                        $all_content = $reader->getEContent();
                        
                        
                        $imported = ilECSImport::_getAllImportedLinks();
                        $exported = ilECSExport::_getAllEContentIds();
                        
                        // read update events
                        foreach($all_content as $content)
                        {
                                // Ask if this is desired
                                if(!isset($imported[$content->getEContentId()]) and 0)
                                {
                                        $event_queue->add(
                                                ilECSEventQueueReader::TYPE_ECONTENT,
                                                $content->getEContentId(),
                                                ilECSEventQueueReader::OPERATION_CREATE
                                        ); 
                                }
                                else
                                {
                                        $event_queue->add(
                                                ilECSEventQueueReader::TYPE_ECONTENT,
                                                $content->getEContentId(),
                                                ilECSEventQueueReader::OPERATION_UPDATE
                                        );
                                }
                                
                                if(isset($imported[$content->getEContentId()]))
                                {
                                        unset($imported[$content->getEContentId()]);
                                }
                                if(isset($exported[$content->getEContentId()]))
                                {
                                        unset($exported[$content->getEContentId()]);
                                }
                                
                        }
                        // read delete events
                        if(is_array($imported))
                        {
                                foreach($imported as $econtent_id => $null)
                                {
                                        $event_queue->add(ilECSEventQueueReader::TYPE_ECONTENT,
                                                $econtent_id,
                                                ilECSEventQueueReader::OPERATION_DELETE);
                                        
                                }
                        }
                        // delete all deprecated export information
                        if(is_array($exported))
                        {
                                ilECSExport::_deleteEContentIds($exported);
                        }
                }
                catch(ilECSConnectorException $e1)
                {
                        $ilLog->write('Cannot connect to ECS server: '.$e1->getMessage());
                        return false;
                }
                catch(ilException $e2)
                {
                        $ilLog->write('Update failed: '.$e1->getMessage());
                        return false;
                }
                return true;
         }

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ilECSEventQueueReader::read

(

)

Read public.

Definition at line 417 of file class.ilECSEventQueueReader.php.

References $ilDB, $query, $res, $row, and DB_FETCHMODE_OBJECT.

Referenced by __construct(), and refresh().

        {
                global $ilDB;
                
                $query = "SELECT * FROM ecs_events ORDER BY event_id ";
                $res = $this->db->query($query);
                $counter = 0;
                while($row = $res->fetchRow(DB_FETCHMODE_OBJECT))
                {
                        $this->events[$counter]['event_id'] = $row->event_id;
                        $this->events[$counter]['type'] = $row->type;
                        $this->events[$counter]['id'] = $row->id;
                        $this->events[$counter]['op'] = $row->op;
                        
                        $this->econtent_ids[$row->event_id] = $row->event_id;
                        ++$counter;
                }
                return true;
        }

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ilECSEventQueueReader::refresh

(

)

Fetch events from ECS server.

public

Parameters

@throws

ilECSConnectorException, ilECSReaderException

Definition at line 250 of file class.ilECSEventQueueReader.php.

References $ilLog, $res, add(), elseif(), handleExportReset(), handleImportReset(), read(), and update().

        {
                global $ilLog;
                
                try
                {
                        include_once('Services/WebServices/ECS/classes/class.ilECSConnector.php');
                        include_once('Services/WebServices/ECS/classes/class.ilECSConnectorException.php');
                        
                        $connector = new ilECSConnector();
                        $res = $connector->getEventQueues();

                        if(!is_array($res->getResult()))
                        {
                                $ilLog->write(__METHOD__.': No new events found.');
                                return true;
                        }
                        $this->log->write(__METHOD__.': Found '.count($res->getResult()).' new events.');
                        foreach($res->getResult() as $event)
                        {
                                // Handle command queue
                                if(isset($event->cmd) and is_object($event->cmd))
                                {
                                        if(!isset($event->cmd->admin) and !is_object($event->cmd->admin))
                                        {
                                                throw new ilECSReaderException('Received invalid command queue structure. Property "admin" is missing');
                                        }
                                        $admin_cmd = $event->cmd->admin;
                                        $this->log->write(__METHOD__.': Received new Commandqueue command: '.$admin_cmd);
                                        switch($admin_cmd)
                                        {
                                                case self::ADMIN_RESET:
                                                        self::handleImportReset();
                                                        break;
                                                case self::ADMIN_RESET_ALL:
                                                        self::handleExportReset();
                                                        self::handleImportReset();
                                                        break;          
                                        }
                                }
                                // Handle econtents events
                                if(isset($event->econtents) and is_object($event->econtents))
                                {
                                        $operation = $event->econtents->op;

                                        if(!in_array($event->econtents->eid,$this->econtent_ids))
                                        {
                                                // It is not necessary to store multiple entries with the same econtent_id.
                                                // since we always have to receive and parse the econtent from the ecs server. 
                                                $this->add('econtents',$event->econtents->eid,$event->econtents->op);
                                                $this->log->write(__METHOD__.': Added new entry for EContentId: '.$event->econtents->eid);
                                        }
                                        elseif($operation == self::OPERATION_DELETE)
                                        {
                                                $this->log->write(__METHOD__.': Updating delete operation for EContentId: '.$event->econtents->eid);
                                                $this->update('econtents',$event->econtents->eid,$event->econtents->op);
                                        }
                                        else
                                        {
                                                // update with last operation
                                                $this->log->write(__METHOD__.': Ignoring multiple operations for EContentId: '.$event->econtents->eid);
                                        }
                                        
                                }
                        }
                        $this->read();          
                }
                catch(ilECSConnectorException $e)
                {
                        $ilLog->write(__METHOD__.': Error connecting to ECS server. '.$e->getMessage());
                        throw $e;
                }
                catch(ilECSReaderException $e)
                {
                        $ilLog->write(__METHOD__.': Error reading EventQueue. '.$e->getMessage());
                        throw $e;
                }
        }

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ilECSEventQueueReader::shift

(

)

get and delete the first event entry

public

Returns

array event data or an empty array if the queue is empty

Definition at line 335 of file class.ilECSEventQueueReader.php.

        {
                $event = array_shift($this->events);
                if($event == null)
                {
                        return array();
                }
                else
                {
                        $this->delete($event['event_id']);
                        return $event;
                }
        }

ilECSEventQueueReader::update (   $a_type,   $a_id,   $a_operation  )

private

update one entry

private

Definition at line 385 of file class.ilECSEventQueueReader.php.

References $ilDB, $query, and $res.

Referenced by refresh().

        {
                global $ilDB;
                
                $query = "UPDATE ecs_events ".
                        "SET op = ".$this->db->quote($a_operation,'text')." ".
                        "WHERE type = ".$this->db->quote($a_type,'text')." ".
                        "AND id = ".$this->db->quote($a_id,'integer')." ";
                $res = $ilDB->manipulate($query);
        }

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Field Documentation

ilECSEventQueueReader::$db

protected

Definition at line 48 of file class.ilECSEventQueueReader.php.

ilECSEventQueueReader::$econtent_ids = array()

protected

Definition at line 51 of file class.ilECSEventQueueReader.php.

ilECSEventQueueReader::$events = array()

protected

Definition at line 50 of file class.ilECSEventQueueReader.php.

ilECSEventQueueReader::$log

protected

Definition at line 47 of file class.ilECSEventQueueReader.php.

const ilECSEventQueueReader::ADMIN_RESET = 'reset'

Definition at line 44 of file class.ilECSEventQueueReader.php.

const ilECSEventQueueReader::ADMIN_RESET_ALL = 'reset_all'

Definition at line 45 of file class.ilECSEventQueueReader.php.

const ilECSEventQueueReader::OPERATION_CREATE = 'create'

Definition at line 41 of file class.ilECSEventQueueReader.php.

Referenced by handleImportReset().

const ilECSEventQueueReader::OPERATION_DELETE = 'delete'

Definition at line 39 of file class.ilECSEventQueueReader.php.

Referenced by ilECSTaskScheduler\handleEvents(), and handleImportReset().

const ilECSEventQueueReader::OPERATION_NEWLY_CREATED = 'newly-created'

Definition at line 42 of file class.ilECSEventQueueReader.php.

Referenced by ilECSTaskScheduler\handleEvents().

const ilECSEventQueueReader::OPERATION_UPDATE = 'update'

Definition at line 40 of file class.ilECSEventQueueReader.php.

Referenced by handleImportReset().

const ilECSEventQueueReader::TYPE_ECONTENT = 'econtents'

Definition at line 36 of file class.ilECSEventQueueReader.php.

Referenced by handleImportReset().

const ilECSEventQueueReader::TYPE_EXPORTED = 'exported'

Definition at line 37 of file class.ilECSEventQueueReader.php.

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The documentation for this class was generated from the following file:

• Services/WebServices/ECS/classes/class.ilECSEventQueueReader.php