How to ensure a process is running in Ruby -


i call ffmpeg command in rails grep stream , push wowza apple device can see also, command this

thread.new   `/usr/local/bin/ffmpeg -re -i http://10.191.255.90:30080/#{user.phone} -vcodec libx264 -vpre ipod640 -g 15 -acodec libvo_aacenc -ar 8000 -ac 1 -f flv rtmp://127.0.0.1/live/#{user.phone}` end

sometimes process killed because of break of network or other reasons, i'm wondering there way can monitor process stop can restart again

my current idea record pid of process, , let resque check whether process of given pid running every 60 sencods, has lot of such process wondering it's performance problem later.

is there better solution manage these process in ruby?

you can this:

thread.new   begin     process.wait process.spawn 'find /oeinfsroif'     raise unless $?.exitstatus == 0   rescue     retry   end end.join

to manage number of attempts before failing:

thread.new   max_attempts = 10   attempts = 0   begin     process.wait process.spawn 'find /oeinfsroif'     raise unless $?.exitstatus == 0   rescue     attempts += 1     attempts < max_attempts ? retry : raise    end end.join

output:

find: `/oeinfsroif': no such file or directory find: `/oeinfsroif': no such file or directory find: `/oeinfsroif': no such file or directory find: `/oeinfsroif': no such file or directory find: `/oeinfsroif': no such file or directory find: `/oeinfsroif': no such file or directory find: `/oeinfsroif': no such file or directory find: `/oeinfsroif': no such file or directory find: `/oeinfsroif': no such file or directory find: `/oeinfsroif': no such file or directory rb:6:in `block in <main>': unhandled exception

Comments

Post a Comment

Popular posts from this blog

Why does Ruby on Rails generate add a blank line to the end of a file? -

running rails generate controller foo home results in: class foocontroller < application controller def home end end (there's nothing on line in actual file, blank line) is there purpose blank line? it's common use newline indicate end of line, last line. many editors (like vi, use) add in newline silently. consensus text files (especially in unix world) should end in newline, , there have been problems historically if wasn't present. why should text files end newline? the tool used count lines in file "wc" counts newlines in file, without trailing newline show 3 instead of 4. it improves readability of templates used in generator. consider: https://github.com/rails/rails/blob/master/railties/lib/rails/generators/rails/controller/templates/controller.rb to remove trailing newline, template have last line of: end<% end -%> instead of: end <% end -%> that seems less readable me. the discussion below refers
Read more

keyboard - Smiles and long press feature in Android -

i've created android keyboard. how add features inserting smilies, , using long keypresses display symbols? to create long-press behavior allows select several options pop-up menu, follow guide (specifically pop-up menu section): http://developer.android.com/guide/topics/ui/menus.html smileys (also known emoticons) combination of keys, understood programs , parsed same way. have do, when clicks smiley face on keyboard, simulate pressing of key combination matching emoticon. example, when clicks smiley, should simulate key presses ':' , ')' :). here's list of emoticons: http://en.wikipedia.org/wiki/list_of_emoticons
Read more

node.js - Bad Request - node js ajax post -

i'm using express 3.0 , node v0.11.0. have button submits form , i'm using ajax post data json object node server. client code is: $('#contact').submit(function(e) { console.log('submit called'); var formdata = json.stringify($('form').serializeobject()); console.log(formdata); $.ajax({ url: "http://localhost:3000/savedata/", type: "post", datatype: 'json', data: {objectdata: formdata}, contenttype: "application/json", complete: function() { console.log('process complete'); }, success: function(data) { console.log('process sucess'); }, error: function() { console.log('process error'); }, }); return false; }); then on server: var express = require('express'); var app = express(); app.set('views', __dirname + '/views'); app.set('view engine', 'jade'); app.use(express.bodyparser());
Read more