HP Integrity NonStop J-Series - Manual (Page 17)

Spring Web Flow
At times, web applications need to execute the same sequence of steps in different contexts. The
Spring Web Flow can be used to implement such repetitive steps or flows because it integrates
with the Spring Web Model View Control (MVC) platform to provide a flow definition language.
For information about downloading and installing the Spring Web Flow, see Appendix E: Installing
Spring Web Flow .
Spring Applications on NonStop
Spring web applications, when deployed on NonStop, can leverage features provided by the
NonStop platform.
Figure 1 shows how a Spring application can interface with other NonStop products.
NOTE: In Figure 1 , the Spring applications are deployed on NSJSP. The same holds true when
running the Spring applications as a standalone application too.
Figure 1 Spring Web Applications
The combinations displayed in Figure 1 are as follows:
1. Spring web applications accessing RMI services (using Spring Remoting).
The Spring framework includes integration classes for remoting support using various
technologies (RMI, http invoker, hessian, burlap, jax-spc, jax-ws, JMS). Using Spring and RMI,
you can expose services through the RMI infrastructure. You must use NonStop TCP/IPv6 or
NonStop IP-CIP as the TCP/IP transport provider because the default RMI implementation uses
TCP/IP as it underlying transport layer.
There can be multiple RMI server instances listening on the same port. When an RMI client
invokes an RMI server, the TCP/IP provider distributes the requests across the RMI server
instances listening on the port in a round-robin manner. If the RMI servers are distributed across
all the processors, RMI calls are distributed across all the processors.
Spring Overview 17