Data Queue Methods

CrtDataQGetSPLList

CrtDataQGetSPLList ($DataQName, $DataQLib, $MaxLength, $Sequence, $KeyLength, $Authority, $QSizeMaxNumEntries, $ QSizeInitNumEntries) - Creates a Data Queue object.

Arguments	Value	Description
$DataQName		Data Queue name
$DataQLib		Data Queue library name
$MaxLength	128 - default	Data Queue length
$Sequence	LIFO - default FIFO *KEYED	Sequence type
$KeyLength	0 - default	Key length Applicable if $Sequence=’*KEYED’
$Authority	LIBCRTAUT - default CHANGE ALL USE *EXCLUDE	Data Queue object authority
$QSizeMaxNumEntries	32999 - default MAX16MB MAX2GB	Queue maximum number of entries
$QSizeInitNumEntries	16 - default	Initial number of entries

Sample Code

	$DQ->CreateDataQ('TESTDQ', $test_lib, 200, 'KEYED', 15, 'CHANGE', 100, 20 )

CrtDataQ

CrtDataQ ($DataQName, $DataQLib, $MaxLength, $Sequence, $KeyLength, $Authority, $QSizeMaxNumEntries, $ QSizeInitNumEntries) - Creates a Data Queue object.

Arguments	Value	Description
$DataQName		Data Queue name
$DataQLib		Data Queue library name
$MaxLength	128 - default	Data Queue length
$Sequence	LIFO - default FIFO *KEYED	Sequence type
$KeyLength	0 - default	Key length Applicable if $Sequence=’*KEYED’
$Authority	LIBCRTAUT - default CHANGE ALL USE *EXCLUDE	Data Queue object authority
$QSizeMaxNumEntries	32999 - default MAX16MB MAX2GB	Queue maximum number of entries
$QSizeInitNumEntries	16 - default	Initial number of entries

Sample Code

	$DQ->CreateDataQ('TESTDQ', ‘TESTLIB’, 200, 'KEYED', 15, 'CHANGE', 100, 20 )

DeleteDQ

DeleteDQ ($DataQName, $DataQLib) - Delete a Data Queue object.

Arguments	Value	Description
$DataQName		Data Queue name
$DataQLib		Data Queue library name

Sample Code

	$DQ->DeleteDQ('TESTDQ', ‘TESTLIB’)

ReceieveDataQueue

ReceieveDataQueue($WaitTime, $KeyOrder, $KeyLength , $KeyData ', $WithRemoveMsg ) - Write a message to a Data Queue.

Arguments	Value	Description
$WaitTime		The amount of time to wait if no entries exist on the Data Queue. < 0 - Waits forever. 0 - Continue processing immediately. If no entry exists, the call completes immediately with the length of data parameter set to zero. > 0 - The number of seconds to wait. The maximum is 99999 which allows a wait time of approximately 28 hours.
$KeyOrder		The comparison criteria between the keys of messages on the Data Queue and the key data parameter. When the system searches for the requested key, the entries are searched in ascending order from the lowest value key to the highest value key until a match is found. If there are entries with duplicate keys, the entry that was put on the queue first is received. Valid values are: GT Greater than LT Less than NE Not equal EQ Equal GE Greater than or equal LE Less than or equal This parameter is ignored if the length of key data is zero. A value of blanks is recommended if the length of key data is zero.
$KeyLength		The length of the key data parameter. If this parameter is specified, it must be zero for nonkeyed Data Queues. For keyed Data Queues it must be equal to the length specified on the KEYLEN parameter on the Create Data Queue (CreateDataQ) method.
$KeyData
$WithRemoveMsg	‘N’- default	Whether the message is to be removed from the Data Queue when it is received.

Sample Code

	$data = $DQ->ReceieveDataQueue(0, 'GE', 15, $data, 'N')

SendDataQueue

SendDataQueue($DataLen, $Data, $KeyLength, $KeyData) - Read a message from a Data Queue.

Arguments	Value	Description
$DataLen		The length of the message data. The minimum length is 8 bytes.
$Data		The message data
$KeyLength		Key length
$KeyData		Key value

Sample Code

	$DQ->SendDataQueue(25.0, $message, 15.0, $key)

ClearDQ

ClearDQ($KeyOrder, $KeyLength, $KeyData) - Clear a Data Queue object.

Arguments	Value	Description
$KeyOrder		The comparison criteria between the keys of messages on the Data Queue and the key data parameter. When the system searches for the requested key, the entries are searched in ascending order from the lowest value key to the highest value key until a match is found. If there are entries with duplicate keys, the entry that was put on the queue first is received. Valid values are: GT Greater than LT Less than NE Not equal EQ Equal GE Greater than or equal LE Less than or equal This parameter is ignored if the length of key data is zero. A value of blanks is recommended if the length of key data is zero.
$KeyLength		Key length
$KeyData		Key value

Sample Code

	$DQ->ClearDQ( ‘EQ’, 15.0, $key)

A PHP Script That Shows the Usage of All Data Queue Methods

Usage Example

<?php 
echo 'Create/Write/Read/Delete Data Queue object'; 

		include_once 'authorization.php'; 
		include_once '../API/iToolkitService.php'; 
		include_once 'helpshow.php'; 

		/* Work with *KEYED Data Queue */ 

		   $test_lib = "QGPL";  
		   $ToolkitSrvObj = ToolkitService::getInstance($db, $user, $pass);
		   $DQ = new DataQueue($ToolkitSrvObj); 
		   $DQ->SetDataQName('TESTDQ', $test_lib); 
		   try { 
		    $DQ->DeleteDQ(); 
		   } 
		   catch (Exception $e) { 
		        //echo "Data Queue does not exist".$e->getMessage(); 
		   } 
		   try { 
		       $DQ->CreateDataQ('TESTDQ', $test_lib, 200, '*KEYED', 15, '*CHANGE', 100, 20 ); 
		    } 
		   catch (Exception $e) { 
		   }     

		  /* Write some data into the Queue*/ 
		  /* prepare array of keys + values*/ 
		        for ($i = 0; $i< 10; $i++){ 
		            $key = 'key'.$i; 
		            $value = 'Value inserted for '.'key'.$i;             
		            $DQKeys[]  = $key;             
		            $DQ->SendDataQueue( 25.0,  $value,  15.0, $key); 
		        } 

		        foreach($DQKeys as $key) 
		        { 
		            $data = $DQ->ReceieveDataQueue(0, 'GE', 15, $key, 'N'); 
		            if($data['datalen']) 
		                $QueueData[$key]= $data['datavalue']; 
		            else 		 
		                $QueueData[$key]=  'Read failed';      
		        } 

		        if(isset($QueueData)) 		 
		            showTable($QueueData); 
		        else 
		            echo "Test failed."; 
		    $DQ->DeleteDQ(); 
		    /* Do not use the disconnect() function for "state full" connection */ 
		   $ToolkitSrvObj->disconnect(); 
		?>