TYPE_LONG: (Possible) Fix for Packing to 8bytes long (big endian) binary

[loretoparisi]

It seems that using CF with type long is not working at all.

I defined this CF:

class RollupCheckpoint extends PandraColumnFamily {

// keyspace in storage.conf
var $keySpace = 'CheckPoints';

// Column name
var $columnFamilyName = 'RollupCheckpoint';

public function init() {
$this->setKeySpace($this->keySpace); // keyspace
$this->setName($this->columnFamilyName); // name
$this->setType(PandraColumnFamily::TYPE_LONG);
}
}

Then I'm inserting new column this way:

$rollupObj = new RollupCheckpoint();
$rollupObj-
>setKeyID( self::pack_longtype($rollupTS) );
$info = array(
't' => $rollupTS,
'checkpoint' => $checkpointTS,
'last-checkpoint' => $lastCheckpointTS,
);

foreach($info as $name => $value) {
$rollupObj->addColumn($name)->setValue($value); // add column to CF
}

$rollupObj->save();

Where two functions pack_longtype and unpack_longtype are from
Cassandra FAQ:

http://wiki.apache.org/cassandra/FAQ#a_long_is_exactly_8_bytes

Pandra is responding:

Warning: pack(): Type N: too few arguments in /Library/WebServer/
Documents/logger /phplib/standalone/Logger/lib/pandra/lib/
ColumnContainer.class.php on line 485

So, I modified the function this way:

protected function typeConvert($columnName, $toFmt) {
(...)
} else if ($this->_containerType == self::TYPE_LONG) {
$columnName = UUID::isBinary($columnName) ?
/*unpack('NN', $columnName) :
pack('NN', $columnName);*/
self::unpack_longtype($columnName) :
self::pack_longtype($columnName);

}

No insert were made in the CF, before that fix (multiline commented
code).

After the fix, CF stats then were:

Column Family: RollupCheckpoint
SSTable count: 1
Space used (live): 381
Space used (total): 381
Memtable Columns Count: 3
Memtable Data Size: 99
Memtable Switch Count: 1
Read Count: 5
Read Latency: 0,059 ms.
Write Count: 6
Write Latency: 0,013 ms.
Pending Tasks: 0
Key cache capacity: 128
Key cache size: 0
Key cache hit rate: NaN
Row cache: disabled
Compacted row minimum size: 0
Compacted row maximum size: 0
Compacted row mean size: 0

So some insert were made in it !

The row converted to JSON was:

{ row : {"t":1291078926,"checkpoint":1290606987,"last-checkpoint":
1279022588}}

But when trying to read it:

$rollupObj = new MXMRollupCheckpoint();
$rollupObj->setKeyID( self::pack_longtype($rollupTS) );
$rollupObj->load();

Logger::getInstance()->debug( '{ row:'.$rollupObj-
>toJSON(True).'}' );

I got

{ row : ["1279022588"]}

As you can see it lacks of NS and CF names, as required by the

$rollupObj->toJSON(True)

but there's something inside of it.
So, what's happening?