Using oracle.toplink.sessions.Connector issues

Question

Hi,
Since we are integrating with others,should use database connections from other app's connection pool.I use one class to implement oracle.toplink.sessions.Connector,in connect method,get connection from other app's connection pool.It works well.But I want to free connection to connection pool when one API is finished.How can I do this?I checked there is no such API.please help

Answer 1

The issue is with your select method.
When you read against the session in TopLink you are reading the object directly from the shared object cache. These objects must be treated as read-only, if you modify them you are modifying what TopLink considers to be the committed state of the object, so when you register it and update it, TopLink does not detect any changes and does not make any updates as you already changed the original cached version of the object. If you wish to modify an object you first need to register or read it through a UnitOfWork, or clone/serialize the object yourself if you wish to edit detached objects and then merge them back.
Example: (if you used a unit of work in your select it would clone the object)
public Employees select(int Employee) {
Session session = server.acquireClientSession();
UnitOfWork uow = session.acquireUnitOfWork();
return read(uow, Employee);
Note, that if you then modified the object locally in the same transaction/unit of work, you would just be able to call commit on that same unit of work, and not require an update method.