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a ruby queue based on a file
class FileQueue
def initialize(file_name)
@file_name = file_name
end
def push(obj)
safe_open('a') do |file|
file.write(obj + "\n")
end
end
alias << push
def pop
value = nil
rest = nil
safe_open('r') do |file|
value = file.gets
rest = file.read
end
safe_open('w+') do |file|
file.write(rest)
end
value
end
def length
count = 0
safe_open('r') do |file|
count = file.read.count("\n")
end
count
end
def empty?
return length == 0
end
def clear
safe_open('w') do |file| end
end
private
def safe_open(mode)
File.open(@file_name, mode) do |file|
file.flock(File::LOCK_EX)
yield file
file.flock(File::LOCK_UN)
end
end
end
@ariera
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ariera commented Oct 21, 2015

exactly what i was looking for, thx :)

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