DB2 for OS/390 and z/OS Powering the World's e-business Solutions

176 DB2 for OS/390 and z/OS Powering the World’s e-business

Result sets to not be returned

 Symptom

JNI panic condition in the Java stored procedure code, resulting in a -430

SQLCODE from CALL statement.

 How to solve

This is caused by closing the connection or returned result sets.

Modify the application to not close.

Applets and servlets

For Web applications, applets and servlets are most common. Figure 7-15 shows

the architecture of Java applet and servlet. Java applets run within a Web

browser, whereas Java servlets run within a Web server environment.

Figure 7-15 Applet and servlet architecture

Java applets are small application programs that are downloaded to and

executed on a Web browser.

Applet

Web

Browser

Web

Server

(HTTP)

Input Request

Class

File

Interpret Applet tag

and locate "class" file

1

2

34

Class file sent v ia

browser to Web

Server

Ap ple t life c ycle

started within

browser JVM

environment

Applet

JVM

Servlet

Architecture

Web Server &

Applicatio n S e rv er

locate and Servlet

life cycle starte d

Servlet

performs

necessary

processing

and

generates

HTML

3

Web

Browser

Web

Server

(HTTP,

WAS)

Input Request

Servlet

Results to

be rendered

in browser

1

4

2