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Stock Example Using RMI |
Contents of the JavaŽ 2 SDK, Standard Edition, v 1.2 |
This directory contains an example that illustrates an applet that exports a remote object in order to receive stock updates from a stock server. The applet displays the stock data dynamically as notifications are received from the server. The interfaces and classes for this example are:
StockWatch
is the remote interface for stock server.
StockNotify
is the remote interface for stock observer.
Stock
is the serializable object containing stock data.
StockServer
(implements StockWatch
)
sends notifications of stock updates to remote objects that have
registered to receive updates.
StockApplet
(implements StockNotify
)
exports a remote object (itself), registers with StockServer for stock
updates, and displays stock notifications as they are received.
On Windows systems, after downloading the JDKTM 1.2.2 release, execute run.bat
in
the docs/guide/rmi/examples/stock
directory, which will
explain each step as it builds and runs the example. Upon completion,
you will need to explicitly destroy the window created for the server
process.
On Solaris, after downloading the Java® 2 SDK, Standard Edition,
v1.2.2, execute the run
script in this
examples/stock
directory, and the script will print out
what it is doing while it runs the example. It assumes that you have
installed the Java® 2 SDK, Standard Edition, v1.2.2 and set your
PATH, CLASSPATH and LD_LIBRARY_PATH according to the SDK installation
instructions. The stock server creates its own RMI registry, so the
"rmiregistry" command does not need to be run. Here are the basic
steps that the run
script executes:
setenv CLASSPATH ../..:$CLASSPATH
javac -d ../.. *.java
rmic -d ../.. examples.stock.StockServer examples.stock.StockApplet
java -Djava.security.policy=security.policy examples.stock.StockServer &
appletviewer index.html
Note: You can set your CLASSPATH back to the old CLASSPATH (without ../.. in it) before running the appletviewer, so that classes get downloaded from the network rather than from your CLASSPATH; each of the scripts actually does this.