Introduction of new characteristics of Jbuider4 (III.)

Vii. Database Tools
The Database Tools feature is enhanced and easier to use.
Jdatastore: Faster, more flexible. There is a significant improvement in the performance of the underlying connection pool. JBUILDER4 support for JTA enables Jdatastore connections to participate in distributed transactions with a standard XA interface.
Jdatastore Explorer can create and manipulate table with a graphical interface. You can create indexes for tables. Jdatastore now supports cross joins, inner joins, outer joins, left and right connections. In a current release, you specify a connected domain by using the "natural" or "using" keyword. Jdatastore now also supports the SQL-92 connection sequence, which supports hierarchical subqueries.
But Jbuilder4 also has its drawbacks:
1. There is a conflict with the Chinese system. At least there is a conflict with Win2000 's Chinese system, its menu always triggers the Chinese input bar.
2. Speed is not fast enough. High configuration is still required.
3. The hardware environment required to develop EJB requirements is too high because of the need to application Server and the requirement to be mounted on the same machine
4. There is a lack of useful tools in Webgain studio, such as Structurebuilder. Lack of efficient integration with tools such as Rose
5. Support Tools, such as version control tools are relatively few

The next step is to implement the remote interface, and the implementation class for the remote interface should:
⑴ specifies one or more interfaces that are implemented.
⑵ defines the method of constructing a remote object.
⑶ provides implementations of all methods that are available for remote invocation.
⑷ Create and install security Manager.
⑸ Create one or more remote object instances.
⑹ registers at least one remote object.