class Qpid::Messaging::Duration

A Duration represents a period of time in milliseconds

Named Durations¶ ↑

The following named Durations are available as symbols:

FOREVER: The maximum integer value for the platform. Effectively this will wait forever.
IMMEDIATE: An alias for 0 milliseconds.
SECOND: An alias for 1,000 milliseconds.
MINUTE: And alias for 60,000 millisecons.

Public Class Methods

new(length) click to toggle source

Creates a Duration with the specified length, in milliseconds.

Options¶ ↑

length - The duration in milliseconds.

Examples¶ ↑

# creates a duration of 15 seconds
# REMEMBER: Duration deals in milliseconds
delay = Qpid::Messaging::Duration.new 15000

# File lib/qpid_messaging/duration.rb, line 57
def initialize length
  @duration_impl = Cqpid::Duration.new length
end

Public Instance Methods

*(factor) click to toggle source

Multiplies the duration of the Duration and returns a new instance.

Raises exceptions on a negative factor. Returns Qpid::Messaging::Duration::IMMEDIATE when the factor is 0.

Examples¶ ↑

# return a duration that is 2 minutes (120,000 ms)
twominutes = Qpid::Messaging::Duration::MINUTE * 2

# File lib/qpid_messaging/duration.rb, line 103
def *(factor)
  raise TypeError.new "Factors must be non-zero positive values" if factor < 0
  return Qpid::Messaging::Duration::IMMEDIATE if factor.zero?
  Qpid::Messaging::Duration.new((self.milliseconds * factor).floor)
end

milliseconds() click to toggle source

Returns the period of time in milliseconds.

Examples¶ ↑

# doubling growth in waiting for messages in a loop
do loop
  set the base duration waiting length
  timeout = Qpid::Messaging::Duration::SECOND
  msg = nil
  # loop until we receive a message
  while msg.nil?
    puts "Waiting #{timeout.milliseconds}ms"
    msg = recv.get timeout
    # if nothing was received, double the duration
    if msg.nil?
      # double out timeout
      timeout = timeout * 2
    else
      # do something with the message
      puts "Received: #{msg.content}"
    end
  end
end

# File lib/qpid_messaging/duration.rb, line 89
def milliseconds
  @duration_impl.getMilliseconds
end