File sender channel - file name "null"

Question

Hi all,
I am designing a scenario where I am reading 2 files from 2 different senders, and these 2 messages are fed to a multi mapping in BPM, which creates a single target message. I need to read the name of only one of the two source files and populate it in one field of the target message.
I have read some blogs and forum threads about how to access the file name from the sender file channel. It calls for turning on the adapter specifc parameters in the channel and writing the following UDF (taken from Michal's blog #2664) -
DynamicConfiguration conf = (DynamicConfiguration) container.getTransformationParameters().get(StreamTransformationConstants.DYNAMIC_CONFIGURATION);
DynamicConfigurationKey key = DynamicConfigurationKey.create("http://sap.com/xi/XI/System/File","FileName");
String ourSourceFileName = conf.get(key);
return  ourSourceFileName;
After doing all this, I am getting file name as "null". Can someone pls let me know the cause for this ? My concern is since I want to read only one file name, so I have updated only that specific file sender channel for adapter specific attributes.
Regards,
Shankar

Answer 1

Hi Raj,
I checked the ASMA for second channel also, but no luck
I can see both the files names in their respective messages in SXMB_MONI under node 'Dynamic Configuration'. But the two messages enter the multi-mapping within BPM (where I have put trace to print the file name as per above code), the value is shown as "null".
1) Is this file name access is possible only in simple scenarios ?
2) Also, is the file receiver mandatory ? I have email receiver in my scenario.
Any clues ?
Regards,
Shankar