This program is written in Java, you may wish to read this first.

This program attempts to connect to a remote computer. If it fails, it tries again. If it succeeds, it lets you know. This is useful, if you wish to connect to a remote computer that is currently not responding. Rather than waste time endlessly trying to connect to the remote computer, just fire up HostResumedNotifer and wait.

For example:

java HostResumedNotifier raptor.ukc.ac.uk 23

will repeatedly attempt to connect to port 23 of raptor.ukc.ac.uk, and inform you when it succeeds.

How to run:

This program requires command line arguments, so you cannot run it by double clicking on the jar file.

java -jar HostResumedNotifier.jar <host name> <port> <interval>

Where <host name> is the name or I.P. address of the computer you wish to connect to, <port> is the port you wish to connect on, and <interval> is how often to attempt a connection.

To do:

• Come up with a better name
• Do something more useful than just quit when the host resumes (this could cause problems with other programs that choose to create a HostResumedNotifier
• Do something useful if too many InterruptedExceptions occur

Version History

• 1.1 - Removed the hard-coded host name, port and retry interval. Tidied up the code.
• 1.0 - First draft

Downloads:

HostResumedNotifier.jar (25kb), includes source code and javadoc documentation

There is also an online version of the javadocs.