reactive-programming

问题 I have a flux that emits some Date . This Date is mapped to 1024 simulated HTTP requests that I'm running on some Executer . What I'd like to do is waiting for all the 1024 HTTP requests before emitting the next Date . Currently when running, onNext() is called for many times and then it is stabilised on some steady rate. How can I change this behaviour? P.S. I'm willing to change to architecture, if needed. private void run() throws Exception { Executor executor = Executors

问题 I have a flux that emits some Date . This Date is mapped to 1024 simulated HTTP requests that I'm running on some Executer . What I'd like to do is waiting for all the 1024 HTTP requests before emitting the next Date . Currently when running, onNext() is called for many times and then it is stabilised on some steady rate. How can I change this behaviour? P.S. I'm willing to change to architecture, if needed. private void run() throws Exception { Executor executor = Executors

问题 Alright, I modified the script following @Pork Chop advice: server.R library(shiny) library(DT) library(RMySQL) con <- dbConnect(MySQL(), user="myuser", host="myhost", dbname="mydb") shinyServer(function(input, output) { sqlOutput <- reactive({ sqlInput <- paste0("select * from mydb.mytable", " where value < ", input$value, ";") dbGetQuery(con, sqlInput) }) output$table <- DT::renderDataTable(sqlOutput(), server=TRUE, rownames=FALSE, filter="top", options=list(pageLength=10)) output$download

问题 I have a small issue with doing a blocking operation in Spring Webflux. I retrieve a list of article documents and from the list of article documents, i would like to update another object. When i execute the below, sometimes it works and sometimes it throws a "block()/blockFirst()/blockLast() are blocking, which is not supported in thread reactor-http-nio-2". Could you please suggest how to fix. I dont really want to make it blocking but not sure how to proceed. There are similar threads in

问题 I am trying to read the request body data from ServerWebExchange in Spring Cloud Gateway. can anyone please help me how to do this. Also why this simple task is so difficult in reactive programming. 回答1: It's the same as reading or modifying the response body. see: ModifyRequestBodyGatewayFilterFactory and ModifyResponseBodyGatewayFilterFactory How to get response body in Spring Gateway 来源： https://stackoverflow.com/questions/64589858/read-the-request-body-from-serverwebexchange-spring-cloud

问题 I have an array of unique ID's and want to perform a bulk action (HTTP patch, delete etc) on them. That needs to be done individually and I need to display individual results. As the requests are individual and it's responses should not affect each other. Results are displayed as they are received. Every call is a separate Observable and what I'm looking for is a way to know when all Observables have completed . The onCompleted method works only when there are no errors. The goal is to

问题 I have the following error no instance(s) of type variable(s) R exist so that void conforms to Mono<? extends R> . How would I resolve this? Im writing a discord bot in java with Discord4J. When a user reacts to the bot emoji for the corresponding gender id like to write to the database (or in this example simply print) the user and their gender. I have a database method: public static void setUserGender(String u, ReactionEmoji e){ String gender = (e.equals(EmojiUtils.EMOJI_MALE)) ? "male" :

问题 In working with a map in shiny using mapview , I've been flummoxed by reactives and trying to make my map dynamically update. Here is a reproducible example that doesn't work properly, despite being designed using principles from other SO answers: # # This is a Shiny web application. You can run the application by clicking # the 'Run App' button above. # # Find out more about building applications with Shiny here: # # http://shiny.rstudio.com/ # library(shiny) library(sf) library(mapview) #

问题 So I am trying to build a list component reactively by angular and RxJS. the list has a lot of features like: search by word change page number change page size filter by field(s) sort search service code: private seachItemSubject = new BehaviorSubject<string>(""); private pageLimitSubject = new BehaviorSubject<number>(10); private pageNumberSubject = new BehaviorSubject<number>(0); private orderingSubject = new BehaviorSubject<ListOrder>({}); private filteringSubject = new BehaviorSubject

问题 Forgive the non-reproducible example. A theoretical solution will do just fine. I want to know how to subset a dataframe stored in a reactive expression for one particular column, to be be assigned a unique output_id, and ultimately displayed in the UI . This is analogous to accessing a column of a dataframe like so: df$column_name I store a dataframe as a reactive expression called data() , using eventReactive() which is linked with an actionButton() in the UI. Code in Environment: #