californium | CoAP/DTLS Java Implementation
kandi X-RAY | californium Summary
kandi X-RAY | californium Summary
Eclipse Californium is a Java implementation of RFC7252 - Constrained Application Protocol for IoT Cloud services. Thus, the focus is on scalability and usability instead of resource-efficiency like for embedded devices. Yet Californium is also suitable for embedded JVMs. More information can be found at and
Support
Quality
Security
License
Reuse
Top functions reviewed by kandi - BETA
- Command entry point
- Reassign the local addresses to all local ports
- Parse an argument
- Stops the NAT
- Initialize the raw properties
- Get a trimmed string property
- Initialize maps from raw key
- Initialize HTTP method
- Process incoming request
- Invoked when a response is received
- Handles an outgoing request
- Start a CoAP client
- Starts the benchmark
- Main entry point
- Sends a request to the destination
- Returns a string representation of this credential
- Sends a request
- Handles a duplicate request
- Read the endpoints
- Send a response to the peer
- Main executor
- Returns the co - request
- Handles a response
- Handle the incoming request
- Demonstrates how to send a client
- Handle timeout event
californium Key Features
californium Examples and Code Snippets
License : Strong Copyleft (CC BY-SA 4.0)
Copy
class Child extends Component {
render() {
console.log(this.props.myFunc);
return <>;
}
}
class Parent extends Component {
list = [
{ btn: {...someProps}},
{ btn: {...someProps} },
{ btn: {...someProps} },
//Test class
public class Test {
public static void main(String[] args) {
Node root = new Node(1, "test1", new Node[]{
new Node(2, "test2", new Node[]{
new Node(5, "test6", new Node[]{})SELECT p.group_id, p.parent, c.child
FROM (
SELECT group_id, parent
FROM YourTable
GROUP BY group_id, parent
)
p CROSS JOIN
(
SELECT group_id, child
FROM dependencies:
flutter:
sdk: flutter
provider: ^6.0.2
import 'package:flutter/material.dart';
import 'package:provider/provider.dart';
void main() {
runApp(
const MyApp());
}
class MyApp extends StatelessWidget {
const Myfrom tkinter import *
# Define the Window
root = Tk()
# Add a Title to The Window
root.title('Colored Button')
# Geometry of window; width by length in pixels
root.geometry('300x200')
# Define the Button; fg is the foreground, bg is the bselect *
from t
MATCH_RECOGNIZE (
ORDER BY id DESC
MEASURES
child.id AS id,
child.name AS name,
child.lvl AS lvl,
parent.id AS parent_id
ONE ROW PER MATCH
AFTER MATCH SKIP TO NEXT ROW
PATTERN (child ancestorclass TrieNode {
constructor(data=null) {
this.children = {}; // Dictionary,
this.data = data; // Non-null when this node represents the end of a valid word
}
addWord(word, data) {
let node = this; // timport 'package:flutter/material.dart';
void main() {
runApp(const MyApp());
}
class MyApp extends StatelessWidget {
const MyApp({Key? key}) : super(key: key);
// This widget is the root of your application.
@override
Widget bubuntu@ip-10-0-1-29:/mnt/efs/fs1$ ls -la
total 40
drwxr-xr-x 10 root root 6144 Apr 6 21:40 .
drwxr-xr-x 3 root root 4096 Apr 5 07:40 ..
drwxr-xr-x 2 1030 1030 6144 Apr 6 21:40 artifactory
drwxr-xr-x 9 1030 1030 6144 Apr 5 07:26 back shuffle.onPressed() {
disable user input;
iterate over the grid {
if (cell contains a text value) {
push Text widget key onto a stack (List);
trigger the hide animation (pass callback #1);
Community Discussions
Trending Discussions on californium
QUESTION
I want to upload a file from a CoAP client by using the californium standard forwarded proxy to a server which supports http-communication.
Is there an alternative with CoAP to build a post Request with a name of the RequestParameter and a payload contents the Value of file?
...ANSWER
Answered 2021-Apr-15 at 05:49CoAP (and so Californium) focus on efficiency for small payloads. POST files will not be the domain of CoAP at all. If you really want that, just load the payload from the file and POST that. Ensure, you configured the MAX_RESOURCE_BODY_SIZE in Californium.properties according your requirements. If you use Californium on both sides, both need to be configured. Alternatively, you may disable the "transparent blockwise" using a 0 MAX_RESOURCE_BODY_SIZE. That will then require, that you handle the single blocks and block-option on your own.
QUESTION
I am exploring on DTLS 1.2 using Californium-Scandium demo-apps projects. It appears that Scandium-core README.md supports the latest draft of Connection Identifiers for DTLS 1.2. According to Connection Identifiers for DTLS 1.2, the CID exchange happens between the Client & the server if client and server wants to talk on based of Connection Id. When I run the demo-apps of Scandium Server & Scandium Client, I am not able to see the exchange of CID happening between the client and the server. Though I can see the Connection Id generation on Client as well Server side of DTLS. I have added the logger in the Record.java but the connection Id is always null in the loggers. My question is whether the CID exchange logic between the DTLS Server and DTLS client is implemented in scandium-core API? If yes, please help me to find out the classes used for this.
...ANSWER
Answered 2021-Feb-17 at 13:16For version 2.6.0, neither the ExampleDTLSClient nor the ExampleDTLSServer comes "out of the box" with CID enabled (but I will change that for 3.0 :-) ).
If you want to see that "out of the box" use the "cf-secure" demo. Start the client with "CID:0" for "support CID", and the server with "CID:6" to use a 6 bytes CID.
To enable CID for ExampleDTLSClient and ExampleDTLSServer, add to the DtlsConfigurationBuilder a
QUESTION
I am currently getting myself into the LwM2M topic and I tried the leshan project from eclipse. I followed the README.md on https://github.com/eclipse/leshan. The standalone demos are working fine, but when I try to build the project with "mvn clean install" I get the following log/error:
...ANSWER
Answered 2020-Nov-12 at 14:46I continued researching on my own and Java 15 is the problem. If anyone has the same problem as i had just switch to Java 11 and run the build as described. It worked fine for me. If you have any other problems I suggest that you also post your questions, concerning leshan lwm2m, on https://github.com/eclipse/leshan/issues.
Jonas
EDIT: You can also do it with Java 15. You have to change the pom.xml document. Change in line 456 the version from 4.0.0 to 5.1.1 .
QUESTION
I wanted to return the name of elements based on two conditions; even protons number and odd neutrons number. I've tried to print both tests and it turns out well. However, when I try to print the elements using 'and' logical, an error has occurred due to different broadcasting. I can't figure out how do I reshape it. Help me out.
The elements, protons and neutrons.
I've already converted elements, protons and neutrons into arrays.
The input;
...ANSWER
Answered 2020-Oct-16 at 15:26Apply the & to the boolean tests, before indexing:
QUESTION
Here is the code i already attempted but it didnt work out:
This code is made by a 14 year old boy (me) so dont worry about the maintenance.
HTML:
...ANSWER
Answered 2020-Feb-28 at 16:55I made a plunker with a working solution: https://plnkr.co/edit/QyAglTqoVx8k5RhZbenV?p=preview
Yeah, it needs put NaamOfAtoom(AtoomNum) inside that berekenen() function to fill that Atoomnaam variable, and change the switch.
Basically, when you did that switch, the cases are numbers, but AtoomNum is a string (you can type letter also), so it didn't entered any case options.
So was equivalent to 12 === '12' returning false. switch is strict comparing === instead of only ==.
Adding a parseInt(number) solved switch part.
QUESTION
I am new in react I am fetching my JSON which is
...ANSWER
Answered 2019-Oct-02 at 15:56Use an alias for the properties that have a dash - :
atomic-number is not a valid variable name in javascript.
QUESTION
I'm trying to create a lazy-Stream with Project Reactor in Californium-SR10.
According to the javadoc:
Transform this Flux into a lazy Iterable blocking on Iterator.next() calls.
Consequently, I have tried the following:
...ANSWER
Answered 2019-Aug-02 at 16:40doOnRequest() 2?
doOnRequest() will fire whenever the subscriber requests new elements from upstream (along with the number of elements requested as its parameter.) Since you've limited the rate to 2, you'd expect this to be called with 2 as a parameter every time, which it's doing.
Flux not complete lazily?
Well, actually it does, but not how you expect it to. Lazy doesn't necessarily mean "one at a time", it just means it will evaluate batches as they're called for, rather than always evaluating the whole Flux in one go.
Specifically, note that the limitRate() method doesn't apply automatically to the iterator in the same way - it has a separate batch size that you have to specify as a parameter to the toIterable() method.
You can specify a prefetch rate and a batch size of 1, and then you're likely to only get 4 elements generated (rather than 3, as it'll always have at least one additional element ready for the following next() call):
QUESTION
I use reactor-netty to request a set of URLs. Majority of URLs belong to the same hosts. reactor-netty seems to make a brand new TCP connection for every URL even if connection to the host is already established for the previous URL. Some servers drop new connections or start to respond slowly when hundreds of simultaneous connections established.
Sample of the code:
...ANSWER
Answered 2019-May-05 at 00:03Yes, reactor netty supports keep-alive, connection reuse, and connection pooling.
Note that .flatMap is a async operation that processes the inner streams in parallel. Therefore, when you call group.flatMap(... the inner requests will be executed in parallel. And since they are executed in parallel, multiple connections will need to be established.
If you want to execute requests to the same host sequentially, change your example to use group.concatMap instead of .flatMap.
If you want to still execute them in parallel, but limit the number of active requests to an individual host, then change your example to use one of the overloaded versions of .flatMap that takes a concurrency parameter.
Also, since you are using HttpClient.create(), your example uses the default global http connection pool. If you want more control over connection pooling, you can specify a different ConnectionProvider via HttpClient.create(ConnectionProvider).
QUESTION
Following this question, I decided to serialise some data I need to send over a TCP/IP connection.
The data is pretty simple :
...ANSWER
Answered 2018-Dec-09 at 01:00You have char** packet which is a pointer to a pointer to some chars.
You then treat that as int * which is a pointer to some ints.
You then overwrite the first int - so you're writing into 'dest' itself and not what it points to. And since you write more after that, you're corrupting the stack.
QUESTION
So I've been working on this program for a while and I have gotten it to a point where it compiles just fine but when I run it I get a Segmentation Fault. I've backtraced the fault via gdb to the function below but cannot for the life of me see where the problem is, and I am not versed enough with gdb to determine any more details on the origin of the fault. Like the question says I'm trying to read from a file into a dynamically allocated linked list where each node of the list has a pointer to a struct called Element. Then I need to convert that linked list to an array of pointers to struct Element. I hope that a fresh pair of eyes can see some mistake I've made that I have been blind to.
UPDATE: Added rest of source files. Added gdb backtrace snippet.
Element.h
...ANSWER
Answered 2018-May-09 at 06:25The good news is you were really, really close. The bad news is the "really really close" part -- it only takes one subtle error to torpedo your code.
First the general discussion. While there is nothing wrong with using a pointer-to-pointer-to-Element, you are missing the benefits of using C++ and the automatic memory handling offered by . That said, it is good to know how to handle both.
Your error is:
Community Discussions, Code Snippets contain sources that include Stack Exchange Network
Vulnerabilities
No vulnerabilities reported
Install californium
Californium 2.x and newer can be used with java 7 or newer. If you want to build it with a jdk 7, but use also plugins which are only supported for newer jdks, the toolchain plugin could be used. That requires a toolchains configuration in "toolchains.xml" in your maven ".m2" folder. To use the jdk7 toolchain, add "-DuseToolchain=true" to the command line. To use the jdk7 toolchain and create javadocs, add "-DuseToolchainJavadoc=true" to the command line (JAVA_HOME is not required).
To support EdDSA, either java 15, java 16, java 17 or java 11 with ed25519-java is required at runtime. Using java 15 (or newer) to build Californium, leaves out ed25519-java, using java 11 for building, includes ed25519-java by default. If ed25519-java should NOT be included into the californium's jars, add -Dno.net.i2p.crypto.eddsa=true to maven's arguments. Note: if "-DuseToolchain=true" is used and the actual jdk to build is java 11, you must disable the i2p eddsa support as well. In that case, it's still possible to use ed25519-java, if the eddsa-0.3.0.jar is provided to the classpath separately. Note: using the oracle build 28 of openjdk 11 uncovers, that calling EdDSAEngine.engineSetParameter(null) fails with ǸullPointerException instead of InvalidAlgorithmParameterException. That causes to fail the verification of the signature at all. Using the aptopen build seems not to call EdDSAEngine.engineSetParameter(null) and therefore works. ed25519-java seems to be not longer maintained. It's therefore recommended to update to newer jdks (e.g. 17) or to use Bouncy Castle (see next section, even if the Bouncy Castle support is experimental).
Support
Reuse Trending Solutions
Find, review, and download reusable Libraries, Code Snippets, Cloud APIs from over 650 million Knowledge Items
Find more librariesStay Updated
Subscribe to our newsletter for trending solutions and developer bootcamps
Share this Page
