netty | Netty project - an event-driven asynchronous network | Websocket library
kandi X-RAY | netty Summary
kandi X-RAY | netty Summary
Netty is an asynchronous event-driven network application framework for rapid development of maintainable high performance protocol servers & clients.
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Top functions reviewed by kandi - BETA
- Performs trin sort .
- Adds the body data to the request .
- Decodes a header block .
- Convert an IP address string to a byte array
- Get web socket content .
- Decompress the input buffer
- Find the multi part disposition .
- Actually flush the queue .
- Unwrap a packet .
- Extract key value pairs .
netty Key Features
netty Examples and Code Snippets
Lines of Code : 6License : Permissive (MIT License)
Copy@Bean
public NettyReactiveWebServerFactory nettyReactiveWebServerFactory() {
NettyReactiveWebServerFactory webServerFactory = new NettyReactiveWebServerFactory();
webServerFactory.addServerCustomizers(new EventLoopNettyCustomizer( Args = --initialize-at-build-time=io.netty \
public static void main(String[] args) throws Exception {
NioEventLoopGroup group = new NioEventLoopGroup(1, new DefaultThreadFactory("netty"));
DnsAddressResol@Override
public void channelActive(ChannelHandlerContext ctx) throws Exception {
totalConnectionCount.incrementAndGet();
if (ctx.channel().isWritable() == false) { // means we hit the max limit of netty
System.out.println(@Component
@Order(-1)
public class TenancyContextFilter implements WebFilter {
private static final Logger LOGGER = LoggerFactory.getLogger(TenancyContextFilter.class);
@Override
public Mono filter(ServerWebExchange exchange, WebFipublic Mono filter(ServerWebExchange exchange, WebFilterChain chain) {
return chain.filter(exchange).doFinally(signalType -> {
//here signalType.toString() is `onComplete`
System.out.println("After all filters and contro
org.springframework.boot
spring-boot-starter-webflux
org.springframework.boot
spring-boot-starter-reactor-netty
org.springframework.boot
spring-boot-starter-t
4.0.0
org.springframework.boot
spring-boot-starter-parent
2.3.0.RC1
com.example
flyway
0.0.1-SNAPSHOT
flyway
Demo project for Spring Boot
11
# application.yaml
spring:
rsocket:
server:
port: 7000
. ____ _ __ _ _
/\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
\\/ ___)| |_)| | |@Component
class AnswerPub {
val webClient = WebClient.builder()
.filter(PrintExchangeFunction())
.baseUrl("https://jsonplaceholder.typicode.com").build()
fun productInfo(): Mono {
return webClient
hornetq-core
hornetq-jms
jboss-ejb-client
jboss-logging
jboss-logmanager
jboss-marshalling
jboss-marshalling-river
jboss-remote-naming
jboss-remoting
jboss-sasl
netty
remoting-jmx
xnio-api
xnio-nio
Community Discussions
Trending Discussions on netty
QUESTION
I have newly installed
...ANSWER
Answered 2021-Jul-28 at 07:22You are running the project via Java 1.8 and add the --add-opens option to the runner. However Java 1.8 does not support it.
So, the first option is to use Java 11 to run the project, as Java 11 can recognize this VM option.
Another solution is to find a place where --add-opens is added and remove it.
Check Run configuration in IntelliJ IDEA (VM options field) and Maven/Gradle configuration files for argLine (Maven) and jvmArgs (Gradle)
QUESTION
I'm trying to initiate a Springboot project using Open Jdk 15, Springboot 2.6.0, Springfox 3. We are working on a project that replaced Netty as the webserver and used Jetty instead because we do not need a non-blocking environment.
In the code we depend primarily on Reactor API (Flux, Mono), so we can not remove org.springframework.boot:spring-boot-starter-webflux dependencies.
I replicated the problem that we have in a new project.: https://github.com/jvacaq/spring-fox.
I figured out that these lines in our build.gradle file are the origin of the problem.
...ANSWER
Answered 2022-Feb-08 at 12:36This problem's caused by a bug in Springfox. It's making an assumption about how Spring MVC is set up that doesn't always hold true. Specifically, it's assuming that MVC's path matching will use the Ant-based path matcher and not the PathPattern-based matcher. PathPattern-based matching has been an option for some time now and is the default as of Spring Boot 2.6.
As described in Spring Boot 2.6's release notes, you can restore the configuration that Springfox assumes will be used by setting spring.mvc.pathmatch.matching-strategy to ant-path-matcher in your application.properties file. Note that this will only work if you are not using Spring Boot's Actuator. The Actuator always uses PathPattern-based parsing, irrespective of the configured matching-strategy. A change to Springfox will be required if you want to use it with the Actuator in Spring Boot 2.6 and later.
QUESTION
Facing below error while starting spark-shell with yarn master. Shell is working with spark local master.
...ANSWER
Answered 2022-Mar-23 at 09:29Adding these properties in spark-env.sh fixed the issue for me.
QUESTION
Currently, google dataproc does not have spark 3.2.0 as an image. The latest available is 3.1.2. I want to use the pandas on pyspark functionality that spark has released with 3.2.0.
I am doing the following steps to use spark 3.2.0
- Created an environment 'pyspark' locally with pyspark 3.2.0 in it
- Exported the environment yaml with
conda env export > environment.yaml - Created a dataproc cluster with this environment.yaml. The cluster gets created correctly and the environment is available on master and all the workers
- I then change environment variables.
export SPARK_HOME=/opt/conda/miniconda3/envs/pyspark/lib/python3.9/site-packages/pyspark(to point to pyspark 3.2.0),export SPARK_CONF_DIR=/usr/lib/spark/conf(to use dataproc's config file) and,export PYSPARK_PYTHON=/opt/conda/miniconda3/envs/pyspark/bin/python(to make the environment packages available)
Now if I try to run the pyspark shell I get:
...ANSWER
Answered 2022-Jan-15 at 07:17One can achieve this by:
- Create a dataproc cluster with an environment (
your_sample_env) that contains pyspark 3.2 as a package - Modify
/usr/lib/spark/conf/spark-env.shby adding
QUESTION
Problem: for one of my unit-tests, I want to simulate throwing an exception (io.netty.handler.timeout.TimeoutException) in combination with Mockito. However, Java won't allow this because the exception is package-protected.
Right now I have the following bit of code:
...ANSWER
Answered 2022-Mar-09 at 10:44The class io.netty.handler.timeout.TimeoutException itself is public, but its constructors are package-private. You can mock the exception:
QUESTION
I am running a Spring Boot app that uses WebClient for both non-blocking and blocking HTTP requests. After the app has run for some time, all outgoing HTTP requests seem to get stuck.
WebClient is used to send requests to multiple hosts, but as an example, here is how it is initialized and used to send requests to Telegram:
WebClientConfig:
...ANSWER
Answered 2021-Dec-20 at 14:25I would propose to take a look in the RateLimiter direction. Maybe it does not work as expected, depending on the number of requests your application does over time. From the Javadoc for Ratelimiter: "It is important to note that the number of permits requested never affects the throttling of the request itself ... but it affects the throttling of the next request. I.e., if an expensive task arrives at an idle RateLimiter, it will be granted immediately, but it is the next request that will experience extra throttling, thus paying for the cost of the expensive task." Also helpful might be this discussion: github or github
I could imaginge there is some throttling adding up or other effect in the RateLimiter, i would try to play around with it and make sure this thing really works the way you want. Alternatively, consider using Spring @Scheduled to read from your queue. You might want to spice it up using embedded JMS for further goodies (message persistence etc).
QUESTION
It was a project that used to work well in the past, but after updating, the following errors appear.
...ANSWER
Answered 2021-Sep-17 at 11:03Add mavenCentral() in Build Script
QUESTION
I have a ktor app. I works fine when I run it in development mode. I package it in a docker image by copying over what the gradle application plugin provided. That also works fine on my local machine 8 cores. But now the strange part. When I do exactly the same thing on a rented V-Server also running Ubuntu-20.04 like my local system, ktor is incredible slow.
...ANSWER
Answered 2021-Aug-31 at 20:52docker-compose being slow and my program not starting seemed to be due to insufficient(not good enough) input to /dev/urandom. Installing https://github.com/smuellerDD/jitterentropy-rngd resolved the problem.
QUESTION
After upgrading from spring-boot-parent version 2.5.5 to 2.6.0, I started seeing these error messages spamming the logs:
[INFO] [stdout] 2022-01-11 13:40:01.157 WARN 76859 --- [ udp-epoll-2] i.m.s.reactor.netty.channel.FluxReceive : [6d1243de, L:/127.0.0.1:58160 - R:localhost/127.0.0.1:8125] An exception has been observed post termination, use DEBUG level to see the full stack: java.net.PortUnreachableException: readAddress(..) failed: Connection refused
Using DEBUG level:
...ANSWER
Answered 2022-Jan-13 at 17:47assuming statsd is not used and configured on your side, since it's pointed to localhost, you may disable it by setting
QUESTION
I'd like connect to Delta using JDBC and would like to run the Spark Thrift Server (STS) in local mode to kick the tyres.
I start STS using the following command:
...ANSWER
Answered 2022-Jan-08 at 06:42Once you can copy io.delta:delta-core_2.12:1.0.0 JAR file to $SPARK_HOME/lib and restart, this error goes away.
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If you are on Linux or MacOS, you need additional development packages installed on your system, because you'll build the native transport.
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