ipc

问题 Closed . This question is opinion-based. It is not currently accepting answers. Want to improve this question? Update the question so it can be answered with facts and citations by editing this post. Closed 5 years ago . I currently have two processes running on the same computer, a 'producer' and a Qt application tasked with displaying the data. These two need to exchange binary data (byte arrays, serialized objects). The data 'parcels' may range in size from a handful of bytes to tens of

问题 Python process forked by NodeJS - Alternative to process.send() for Python? I followed the solution above but doesnt seem to work (no messages are being send by the child python code. Here is my code: const spawn = require('child_process').spawn; var child = spawn('python3', ['child.py'], { stdio:[null, null, null, 'pipe'] }); child.on('message', function(message) { console.log('Received message...'); console.log(message); }); and # !/usr/bin/python3 import os os.write(3, str.encode("HELLO"))

问题 i have a class with a Constructor and Async functions. I have done module.exports so that i could call my Class from my GUI.js file and in my GUI.js file, i have required that class, and everything works fine. But inside my class, im trying to do this ipcRenderer.send('message', 'Hello'); And im getting this error: TypeError: Cannot read property 'send' of undefined is it possible to remote the ipcRenderer in my GUI.js? Thanks. i have required the module in my main file, and in my renderer

问题 I have 2 processes that need to communicate over the same PC and different PCs. In the local case the process communication is among different processes e.g Process A and Process B . In the remote case it will be among 2 instances of Process A running in different PCs. I will create them from scratch and I am wondering what is the best approach. I am aware of RMI and sockets but I was wondering for my case as described, and taking also into account that the messages exchanged are small and

问题 I am creating a message queue with the following snippet by following The Linux Programming Interface. if((mq_open("/my_message_queue", O_CREAT, O_RDWR, NULL)) == -1) { perror("mq creation failed"); } Running this snippet I get an error: "permission denied". I wanted to check and see if I had created the queue previously and not destroyed it, so I used ipcs. However, ipcs does not show any active message queues. I have never used the POSIX IPC libraries in my development environment before

问题 What's the most efficient way to insert R objects (more specifically, time series expressed as xts or data.table objects, i.e. time-based and numeric columns) into a kdb+ database? I was able to locate only solution involving string serialization via q expressions as described here and here. 回答1: My solution was inspired by this version of qserver.c from github Yang added two functions: convert_binary, convert_r that [de]serialized data, which is basically what you asked for. However, the

问题 I wish to spawn a long-running sub-process from clojure and communicate with this process via the standard streams. Using the conch library, I can spawn and read the process, and read data from the out stream: (def my-process (sh/proc "my_dumb_process")) ; read 10 lines from my-process's stdout. Will block until 10 lines taken (take 10 (line-seq (clojure.java.io/reader (:out p)))) I want to invoke an asynchronous callback whenever my-process prints to stdout - whenever data is available in

问题 I have an application App1 which defines class A and uses instances of this class. What I want to achieve is - after App1 is installed on the device to be able to load App2 which defines and implements class B which is subclass of class A (imported from App1 package); and be able to get an instance of class B in the App1. Class B doesn't add any new interfaces, so using it as class A is ok. But I am not sure how to pass the instance of class B to App1 (preferrably without any user interaction

问题 I'm building a web application in ASP.Net 4.0 which must maintain an in-memory state shared between users (better to say between group of user). It is not a standard application and the state related to a group of users are/can/should be persisted only after a group of actions are completed (which can take half an hour). This requirement can't be changed. As far as i know I can't rely in an in-proc memory because a recycle will clear my state. The only solution I found is to create a standard

问题 First of all sorry if this question has been already asked somewhere, but after a few hours on google I still can't find an answer. I am pretty new in portlet development, (but we have a shortage of developers and I have to work with it time to time), so the solution might be something trivial, but I really don't have enough experience with it. The problem is I have two portlets on a page and I try to let one of them know about changes in the other. For this I use IPC. In the first one I have