SOAP, webservice and JAVA

Hi, all,

If there are two different business systems need to exchange data, after sending and receiving messages, they both have to update their database. Do you think directly using JDBC adapter to insert/update each other's tables is a secure and effient way? Or using JAVA/APAB proxy to send out data, then using SOAP adapter to receive the data, and then using Java program to update database is much better? Can anybody provide any sample scenario and Java programs for the later? Any comment will be highly appreciated!

Marea