NonStop Server for Java (NSJ) Programmer's Guide (NSJ 2.1+)

Connection Pooling

A connection pool is a cache of database connections that is maintained in memory so that the connections can be reused.

NonStop Java does not support connection pooling because it is normally implemented by the middle-tier server vendor.

Distributed Transactions

For an application, the NonStop Java JDBC driver supports distributed transactions in a standard way, as described in the

JDBC 2.0 Standard Extensions document. The JDBC API assumes that distributed transaction boundaries are controlled either

by a middle-tier server or another API, such as the user transaction portion of the Java Transaction API. NonStop Java does not

support the middleware (those implementing resource managers) pieces of distributed transactions. Instead, NonStop Java

leaves the implementation of such functionality to the middleware vendor.

The user transaction portion of javax.transaction is implemented. At run time, NonStop Java detects whether the Java

Transaction Services (JTS) are present. If JTS is present, the transaction is delegated to JTS. If JTS is not present, the

transaction is delegated to com.tandem.tmf.

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NonStop Java Programmer's Reference (426947-002)