pre-processing barcode scanning functionality Oracle MSCA/MWA using Custom Scan Manager

Hello Everyone,

I need to pre process scanned value in MWA field . I need to implement it using Custom scan manager .

I have followed few articles available on internet .but none is working.

For Java

I have done following steps

1. create class xxx.custom.CustomScanManager

2. moved file in $JAVA_TOP/xxx/custom

3. then bounce mwa port.

But it's not calling my class.Can someone suggest which step i have missed.

I have also tries to implement using pl sql .But it's not calling code.

Please provide suggestion

Thanks

Jitender