start_and_wait.rb

####> This code and all components © 2015 – 2019 Wowza Media Systems, LLC. All rights reserved.
####> This code is licensed pursuant to the BSD 3-Clause License.

require "wsc_sdk"
require_relative "../client"  # Get our client
require_relative "../helpers" # Include some helpers to make the code more direct

# Ensure the args passed in are present
arguments         = ask_for_arguments(__FILE__, transcoder_id: nil)

# Extract some data into convenience variables
transcoders       = $client.transcoders
transcoder_id     = arguments[0]

# Request the transcoder object
transcoder        = transcoders.find(transcoder_id)

# Handle an API error (in the helpers.rb file)
handle_api_error(transcoder, "There was an error finding the transcoder") unless transcoder.success?

# Get the result of starting the transcoder.  We add a code block, which
# instructs the SDK to enter a wait loop, and periodically polls the API
# for the transcoder state until either the `started` state is returned or
# the timeout period is reached.
state             = transcoder.start do |wait_state, transcoder_state|
  # This code will execute each time the state of the transcoder is polled
  # during the wait loop.  You can check the wait_state to determine what the
  # outcomes of each request are.

  if wait_state == :waiting
    # We're still waiting for the started state to be returned
    puts "Waiting..."
  elsif wait_state == :complete
    # We've successfully started the transcoder, so output the completed state
    # Defined in helpers.rb
    output_model_attributes(transcoder_state, "Completed Transcoder State:")
  elsif wait_state == :timeout
    # A timeout occurs if the start state isn't reached within the timeout
    # limit, which defaults to 30 seconds.

    puts "TIMEOUT: Could not start the transcoder within the timeout period."
  end
end

# Handle an API error.  (In the helpers.rb file)
handle_api_error(state, "There was an error starting the transcoder") unless state.success?

# Output the transcoder state
# Defined in helpers.rb
output_model_attributes(state, "Final Transcoder State:")