https://github.com/consol/chaos-professor
Chaos Professor is a web application that creates some chaos in the JVM.
https://github.com/consol/chaos-professor
chaos demo java openshift
Last synced: 6 months ago
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Chaos Professor is a web application that creates some chaos in the JVM.
- Host: GitHub
- URL: https://github.com/consol/chaos-professor
- Owner: ConSol
- Created: 2017-03-02T10:49:03.000Z (over 8 years ago)
- Default Branch: master
- Last Pushed: 2017-04-08T11:18:57.000Z (over 8 years ago)
- Last Synced: 2025-04-14T23:13:32.286Z (6 months ago)
- Topics: chaos, demo, java, openshift
- Language: Java
- Size: 555 KB
- Stars: 7
- Watchers: 8
- Forks: 6
- Open Issues: 1
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Metadata Files:
- Readme: README.md
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README
Chaos Professor
===============
Usage
-----
Chaos Professor is a web application that creates some chaos in the JVM.
After cloning with git you can start the web application locally using Maven and Spring boot.
mvn spring-boot:run
The web application runs on port 8080 by default. Open your browser and point to the application (http://localhost:8080).
The chaos professor web app exposes a REST API for calling some operations. Following
operations are supported:
* Heap: Creates Java heap memory usage by loading random byte data into memory.
* **size**: size in mb specifies the target size to allocate (default = 5mb)
* **time**: time in milliseconds to keep the allocated memory (default = 3000ms)
* CPU: Creates CPU load by creating multiple threads that calculate Math.tan() values in endless loop.
* **threads**: amount of threads to create (default = 10)
* **keepAlive**: time to keep computing threads alive (default = 5000ms)
Examples how to use the REST API. Open your browser and hit following examples:
http://localhost:8080/chaos/heap
http://localhost:8080/chaos/heap?size=500&time=10000
http://localhost:8080/chaos/cpu
http://localhost:8080/chaos/cpu?threads=100&keepAlive=20000
Operation properties are optional so you can leave them out as you like.
Jolokia
-------
The web application also exposes Jolokia services with a REST API. So you can access JVM related attributes
in your browser:
http://localhost:8080/jolokia/read/java.lang:type=Memory/HeapMemoryUsage
http://localhost:8080/jolokia/read/java.lang:type=OperatingSystem/ProcessCpuLoad
First example reads the actual JVM memory usage. Second example reads the actual JVM CPU usage in %. The REST API returns
JSON objects as response.
You can also execute JMX operations with Jolokia. For example you can call Java garbage collection.
http://localhost:8080/jolokia/exec/java.lang:type=Memory/gc