Screen data handling in Screen Enhancement with BAdI's ?

Hi all,
I'm trying to build a Screen Enhancement with (new) BAdI concept.
But now I'm having a Problem. The new BAdI's don't allow variable Attributes (instance/static attribute) in the BAdI Interface.
If I try to define an instance or static Attribute for the BAdI-Interface I get the following error message:
"BAdI interface <my_badi_if> contains non-constant attributes "
In my Screen Enhancement I have build a Subscreen with new fields in it. These field data couldn't be saved in the BAdI class (e.g. via BAdI-methods my_badi->get_data_from_screen... and my_badi->put_data_on_screen...) because having no attributes.
How these screen-data could be handled without BAdI-Interface-Attributes?
Thanks in advance,
Anja

Having the same service to get one product price as well as all product prices would not be recommended. Two separate services would be more reasonable
Mass data handling in SOA is not entirely different than let's say in BAPI/RFC environment. parallelism, multi-threading, locking, commit and many others are typical elements of considerations.
From a scalability standpoint, you can always be interested in how optimal its performance is whether you call it once or a million times. If the service is a rather slim one (lightweight in terms of number and types of parameters as well as processing code), you'll surely have better chance than with a service that's heavyweight.

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===================================================================
0 [Thread-2] INFO com.oracle.util.plugins.PluginRegistry - Successfully created plugin factory: com.oracle.determinations.web.crmod.plugins.CrmodAdapter
21 [Thread-2] INFO com.oracle.util.plugins.PluginRegistry - Successfully created plugin factory: com.oracle.determinations.web.crmod.plugins.CrmodAdapter
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92045 [http-8080-1] INFO com.oracle.util.plugins.PluginRegistry - Successfully created instance of plugin: com.oracle.determinations.web.crmod.plugins.CrmodAdapter
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========== MY ADAPTER PROPERTIES FILE : crmod-data-adapter.properties HAS BELOW DATA ============
## REQUIRED SETTINGS
## Properties for CRMOD Web Services
web-service-url                         =https://secure-ausomxapa.crmondemand.com/Services/Integration
## Supports WS1.0 and WS2.0
web-service-version                    =1.0
## Properties for Authentication
## Username and password must be encrypted using configuration-encrypter tool provided by the product.
## Please refer to Configuring CRM On Demand Connector for Web Determinations of Developer Help for more details.
username                              =Y3JtaXQtZGVtby9jcm1pdA==
password                              =T25EZW1hbmQ=
## OPTIONAL SETTINGS
## Set fixed-authentication to false if you want to implement other forms of authentication
fixed-authentication                =false
## Properties for the mapping file
mapping.load.from.rulebase           =true
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mapping.location.path               =/configuration/mapping
========= MY Custom Web APPLET URL in CRMOD HAS BELOW ===============
http://localhost:8080/crmod-web-determinations?caseID=new

On Save click getting below error from CRMOD:
9816032 [http-8080-1] ERROR com.oracle.determinations.web.platform.servlet.WebDeterminationsServletUtility - com.oracle.determinations.interview.engine.exceptions.DataAdaptorException: CRMOD-OPA ERR [SOAP Response Parser: CRM On Demand errors found in the SOAP request for saving.
Internal Error: Session is not available. Aborting.]
com.oracle.determinations.interview.engine.exceptions.DataAdaptorException: CRMOD-OPA ERR [SOAP Response Parser: CRM On Demand errors found in the SOAP request for saving.
Internal Error: Session is not available. Aborting.]
=============
Phil Whitwell | Director Product Strategy Advised as to check SOAP Request using TCPMon. Then I followed the below steps:
Step 1) changed URL entry in crmod-data-adapter.properties file
## Properties for CRMOD Web Services
web-service-url =http://localhost:5049/Services/Integration
# earlier entry
#web-service-url =https://secure-ausomxapa.crmondemand.com/Services/Integration
Step 2) Restarted TOMCAT6
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[My Tomcat is listening on 8080, I cannot bind tcpmon to listen there as well. the way to use tcpmon correctly is to set the target port to 8080 and set the listen port to some currently unused port (say 5049) and Setup My client – CRMOD As mentioned in Step 1]
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- <SOAP-ENV:Envelope xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/" xmlns:ns="urn:crmondemand/ws/account/10/2004" xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/">
<SOAP-ENV:Header />
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<Location>UK</Location>
<AccountName>Phil</AccountName>
<Industry>BFSI</Industry>
</Account>
</ListOfAccount>
</ns:AccountWS_AccountInsert_Input>
</SOAP-ENV:Body>
</SOAP-ENV:Envelope>
=======================================================
What is incorrect in the above SOAPRequest.xml, why CRMOD is throwing an error on "SAVE",
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