About

Pinger is a Java/Swing desktop application to periodically ping a small number of hosts and display the response times in simple bar graphs.

Hosts

The hosts can be configured in the UI. Hosts and screen position are persisted to ${HOME}/pinger.ini.

Operating parameters

• All hosts are pinged every 5 seconds.
• Echo events are recorded for up to 24 hours.
• Chart displays are updated every 200 ms.
• Event times and ping durations are displayed on exponential scales.

Code / Compatibility

My Java coding style attempts to minimize code, so it is not a model of pattern-oriented design. There are no tests. Error handling is minimal.

The code was developed using Oracle JDK 1.8 but the compliance of generated code is dialled back to 1.6, so it should run in any JRE >= 1.6 on those operating systems supported by icmp4j (see below).

Usage

Download and/or extract Pinger.jar and run with

java -jar Pinger.jar

Pinger recognizes no command-line parameters.

Dependencies / Acknowledgements

1. Pinger uses and is indebted to Sal Ingrill's icmp4j
   icmp4j is licensed under the GNU LGPL 3 with some provisos: icmp4j readme.txt
   icmp4j includes native libraries for Microsoft Windows™ , Mac OS X™ and Linux™ operating systems, so Pinger is likely to run on recent versions of all of those.
   To date, I've only tested it under Windows 7.
2. Pinger uses jdotsoft.com's JarClassLoader to non-explosively nest and load the icmp4j jars in pinger.jar.
   JarClassLoader is licensed under the GNU GPL 3 .

License

Apart from its dependencies as mentioned above, Pinger is licensed under the MIT License