lighty | Lightweight OpenDaylight runtime library | Networking library
kandi X-RAY | lighty Summary
kandi X-RAY | lighty Summary
lighty.io is a Software Development Kit powered by OpenDaylight to support, ease & accelerate the development of Software-Defined Networking (SDN) solutions in Java. Developed by PANTHEON.tech. It utilizes core OpenDaylight components, which are available as a set of libraries and are adapted to run in a plain Java SE environment.
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Top functions reviewed by kandi - BETA
- Init procedure
- Imports the given input stream into the given configuration file
- Deserialize the given JSON data
- Deserialize a given XML input
- Get schema context for specific capabilities
- Method to get all models in the given capabilities
- Closes the BGP procedure
- Closes all the topology providers
- Stop the controller
- Waits for the given port to be available
- Returns a hashcode of the engine
- Serialize an RpcNode to a XML stream
- Initialize the Light Controller
- Gets default configuration
- Create an instance identifier from a path
- Edit data
- Initialize the ClusterBootstrap
- Convert a NormalizedNode to an Update
- Initializes all services
- Initialize an alert web environment
- Check if user is authorized
- Initialize Restconf
- Creates stream observer
- Initialize the swagger
- Returns true if the given object matches the given config
- Builds a server
lighty Key Features
lighty Examples and Code Snippets
Community Discussions
Trending Discussions on lighty
QUESTION
thanks for reading!
I connected an adafruit neopixel to my Raspberry Pi Zero (1. generation) and got them working with test python code.
As the next step I wanted to generate a webpage with buttons controlling the neopixel. I mostly followed this tutorial https://www.hackster.io/mjrobot/iot-controlling-a-raspberry-pi-robot-over-internet-6988d4#toc-step-5--installing-the-lighttpd-webserver-8
At first I got a simple bash cgi script running, which created and wrote the current time into a file. Switching to a python cgi script went fairly easy without changing any configurations file, which left me wondering. But running the test python code from the html is simply not working. As with previous problems I started reading and tinkering but it seems that any solution I tried, doesn't work for me.
I can't recount (working and reading the past days on this) everything I did but
I added www-data to the sudoer group, I created a file called 010_www-data-nopasswd in the /etc/sudoers.d directory with www-data ALL=(ALL) NOPASSWD: ALL as content.
I added www-data to the groups gpio, i2c and spi.
I ran
sudo visudo
and added
www-data ALL=(ALL:ALL) ALL
and
www-data ALL = NOPASSWD: /var/www/lighttpd/cgi-bin/neopixelTest.py
and still it won't work.
I tried bash cgi script to call the test python script with sudo and it works! So I think it boils down to this.
I've read, that in the config files there is a line like ".py" => "/usr/bin/python" telling lighty to call /usr/bin/python for cgi scripts ending with .py, so I came up with the idea to put sudo into this line, so that basically every python script gets run as sudo. Really not a good thing, but I think this whole project is more quick and dirty and better than running lighty as root. But I can't find this line.
This is my /etc/lighttpd/lighttpd.conf file.
...ANSWER
Answered 2021-Feb-02 at 15:17cgi.assign = ( "" => "" ) tells lighttpd to execute the cgi scripts directly (so they must be marked executable (chmod +x)) and should have #!/usr/bin/python3 or similar as the first line.
For the specific CGI scripts that need to run as root, you might create a wrapper script called my-script-name in cgi-bin which exec's sudo
Another alternative is to put all privileged scripts into a subdirectory, and create a lighttpd condition
QUESTION
Me and a friend of mine are making a 3D engine with LWJGL, and after trying to pass a float array to my fragment shader as a uniform, the JVM started crashing. Here's the relevant part of the JVM crash log:
...ANSWER
Answered 2020-Nov-29 at 11:05LWJGL only works with direct NIO Buffers, that is, ByteBuffers that are not backed by on-heap Java arrays but backed by off-heap virtual memory allocated in the JVM's process but outside of the JVM-managed garbage-collected heap. This is to efficiently communicate native virtual memory to low-level libraries, such as OpenGL, without having to "pin" potentially garbage-collectable/moveable memory before handing a pointer to it to native libraries.
See the section "Direct vs. non-direct buffers" in https://docs.oracle.com/en/java/javase/15/docs/api/java.base/java/nio/ByteBuffer.html
The reason for the crash is that the non-direct ByteBuffer you supply (the one being created by .wrap(array)) has an internal address field value of 0. This is what LWJGL looks at when it actually calls the native OpenGL function. It reads that address field value and expects this to be the virtual memory address of the client memory to upload to the uniform, which OpenGL will then treat as such.
So, in essence: When you use LWJGL, you must always only use direct NIO Buffers, not ones that are wrappers of arrays!
You should first read this LWJGL 3 blog post about efficient memory management in LWJGL 3: https://blog.lwjgl.org/memory-management-in-lwjgl-3/
Community Discussions, Code Snippets contain sources that include Stack Exchange Network
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Install lighty
Install JDK - make sure JDK 11 is installed
Install maven - make sure you have maven 3.6.3 or later installed
Setup maven - make sure you have the proper settings.xml in your ~/.m2 directory
Build & Install locally - by running command: mvn clean install -DskipTests
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