Reactor

How to exclude a path from authentication in a spring based reactive application?

北城余情 提交于 2019-12-08 07:54:37
问题 In a non reactive spring application I would usually create a configuration class, extend WebSecurityConfigurerAdapter and configure the WebSecurity like such: @Override public void configure(WebSecurity web) throws Exception { web.ignoring().antMatchers("/pathToIgnore"); } How can I do the equivalent in a reactive application? 回答1: In your security config class which you have annotated with @EnableWebFluxSecurity and @EnableReactiveMethodSecurity , register a bean as follows: @Bean public

Reading a HttpContent that has a PooledUnsafeDirectByteBuf

試著忘記壹切 提交于 2019-12-08 05:18:58
问题 I have a Reactor-Netty HttpServer, to which I send data that is more than 1024 bytes from an HttpClient. In the client I get the different parts of the request in a Flux with the idea of concatenating the data into a String that I can ultimately parse. I was of the opinion that this could have been done by the HttpObjectAggregator, but alas no. When the client receives the content it comes in as DefaultHttpContent(data: PooledSlicedByteBuf(ridx: 1024, widx: 1024, cap: 1024/1024, unwrapped:

php中pcntl_fork详解

本秂侑毒 提交于 2019-12-07 21:44:21
pcntl_fork()函数是php-pcntl模块中用于创建进程的函数。(不支持windows) 至于php_pcntl扩展如何安装开启这里就不介绍了,只分析pcntl_fork()这个函数本身。 1.$one = 123; 2.$one++; 3.$two = time(); 4.$pid = []; 5.$pid = pcntl_fork(); 6.$three = time(); 当:pcntl_fork()函数执行的时候,会创建一个子进程。子进程会复制当前进程,也就是父进程的所有:数据,代码,还有状态。 1.当pcntl_fork()创建子进程成功后,在父进程内,返回0,在子进程内返回自身的进程号,失败则返回-1 2.子进程会复制父进程的代码,数据。那么就说明:子,父进程拥有的代码和数据会一模一样。 3.重点:子进程会复制父进程的状态,那么就有上面的示例代码:在第五行执行了pcntl_fork,那么创建出的子进程,代码也是从第五行开始执行的。又子进程复制了数据,代码。所以,在子进程内同理存在:$one,$two等变量 for ($i = 0; $i < 3; $i++) { $pid = pcntl_fork(); } sleep(30); 那么:上面的for循环,实际会产生多少个子进程?答案是7个,在linux下,用ps命令将可以看到8个进程(1个父进程,7个子进程)

Reading a HttpContent that has a PooledUnsafeDirectByteBuf

泄露秘密 提交于 2019-12-07 01:59:34
I have a Reactor-Netty HttpServer, to which I send data that is more than 1024 bytes from an HttpClient. In the client I get the different parts of the request in a Flux with the idea of concatenating the data into a String that I can ultimately parse. I was of the opinion that this could have been done by the HttpObjectAggregator, but alas no. When the client receives the content it comes in as DefaultHttpContent(data: PooledSlicedByteBuf(ridx: 1024, widx: 1024, cap: 1024/1024, unwrapped: PooledUnsafeDirectByteBuf(ridx: 1024, widx: 1024, cap: 1024)), decoderResult: success) and

[转]Netty进阶之路--ChannelHandler并发安全、NioEventLoop防阻塞挂死

那年仲夏 提交于 2019-12-06 12:53:38
  《Netty进阶之路》第7章、第8章分别提出ChannelHandler并发安全问题,NioEventLoop线程阻塞导致消息接收和处理缓慢。ChannelHandler的并发安全问题很好分析,NioEventLoop线程阻塞则需要一些技巧。    1 ChannelHandler并发安全   默认每个Channel中有各自的ChannelHandler实例,因此如果所有业务在NioEventLoop中完成则没有线程安全问题,因为从消息接收到响应写出阶段都由同一个NioEventLoop线程处理;若在ChannelHandler消息处理过程中新开启一个线程,则新线程和NioEventLoop同时读写ChannelHandler中的变量时会有线程不安全的风险。 @Component(value = "gatewayChannelInitializer") public class GatewayChannelInitializer extends ChannelInitializer { private static final String ENCODER = "encoder"; private static final String DECODER = "decoder"; @Autowired private BusyMan busyMan; protected void

How to perform multi-threaded map/reduce using Reactor framework 2.x?

天大地大妈咪最大 提交于 2019-12-06 10:26:12
问题 I previously asked this question for Reactor 1.x: Let's say I have a Collection<Map> . I want to: Transform each Map instance to an object of type Foo concurrently (each instance is totally independent of another - there is no need to convert each serially/iteratively). When all of them are converted, I want a a method, onReduce(Collection<Foo> foos) , to be called - the argument contains all of the resulting Foo instances. But we can't seem to find an equivalent solution for Reactor 2.x -

Twisted reactor starting multiple times in a single program?

五迷三道 提交于 2019-12-06 09:44:19
问题 Is it possible to start the reactor more than once in the same program? Suppose you wanted to encapsulate twisted functionality inside a method, for API purposes. For example, mymodule.py looks like this: 1 from twisted.web.client import getPage 2 from twisted.internet import reactor 3 4 def _result(r): 5 print r 6 reactor.stop() 7 8 def _error(e): 9 print e 10 reactor.stop() 11 12 def getGoogle(): 13 d = getPage('http://www.google.com') 14 d.addCallbacks(_result, _error) 15 reactor.run() 16

深入了解Netty【五】线程模型

点点圈 提交于 2019-12-06 06:57:33
引言 不同的线程模型对程序的性能有很大的影响,Netty是建立在Reactor模型的基础上,要搞清Netty的线程模型,需要了解一目前常见线程模型的一些概念。 具体是进程还是线程,是和平台或者编程语言相关,本文为了描述方便,以线程描述。 目前存在的线程模型有: 传统阻塞IO服务模型 Reactor模型 Proactor模型 1、传统阻塞IO服务模型 采用阻塞IO模型获取输入的数据。 每个连接需要独立的完成数据的输入,业务的处理,数据返回。 当并发数大的时候,会创建大量的线程,占用系统资源,如果连接创建后,当前线程没有数据可读,会阻塞,造成线程资源浪费。 2、Reactor模型 IO多路复用 线程池 = Reactor模型 根据Reactor的数量和处理线程的数量,Reactor模型分为三类: 单Reactor单线程 单Reactor多线程 主从Reactor多线程 下面分别描述。 2.1、单Reactor单线程 图中: Reactor中的select模块就是IO多路复用模型中的选择器,可以通过一个阻塞对象监听多路连接请求。 Reactor对象通过Select监控客户端请求事件,收到事件后,通过Dispatch进行分发。 如果是 建立连接 事件,则用Acceptor通过Accept处理连接请求,然后创建一个Handler对象,处理连接完成后的业务处理。 如果不是建立连接事件

How to limit the number of active Spring WebClient calls

白昼怎懂夜的黑 提交于 2019-12-05 19:15:58
I have a requirement where I read a bunch of rows (thousands) from a SQL DB using Spring Batch and call a REST Service to enrich content before writing them on a Kafka topic. When using the Spring Reactive webClient, how do I limit the number of active non-blocking service calls? Should I somehow introduce a Flux in the loop after I read data using Spring Batch? (I understand the usage of delayElements and that it serves a different purpose, as when a single Get Service Call brings in lot of data and you want the server to slow down -- here though, my use case is a bit different in that I have

[转]Netty进阶之路--ChannelHandler并发安全、NioEventLoop防阻塞挂死

我怕爱的太早我们不能终老 提交于 2019-12-05 18:29:42
  《Netty进阶之路》第7章、第8章分别提出ChannelHandler并发安全问题,NioEventLoop线程阻塞导致消息接收和处理缓慢。ChannelHandler的并发安全问题很好分析,NioEventLoop线程阻塞则需要一些技巧。    1 ChannelHandler并发安全   默认每个Channel中有各自的ChannelHandler实例,因此如果所有业务在NioEventLoop中完成则没有线程安全问题,因为从消息接收到响应写出阶段都由同一个NioEventLoop线程处理;若在ChannelHandler消息处理过程中新开启一个线程,则新线程和NioEventLoop同时读写ChannelHandler中的变量时会有线程不安全的风险。 @Component(value = "gatewayChannelInitializer") public class GatewayChannelInitializer extends ChannelInitializer { private static final String ENCODER = "encoder"; private static final String DECODER = "decoder"; @Autowired private BusyMan busyMan; protected void