Request returned undefined method `parse' when extend Sensu Plugin Metric class

Question

I am calling an API in Sensu custom metric-collection-check, but when I tried to parse the response its throw the below error

Request returned undefined method `parse' for Sensu::Plugin::Metric::CLI::JSON:Class

While the same API parse working in standard-check when it extends from Sensu::Plugin::Check

Here is the check

    #!/opt/sensu/embedded/bin/ruby
    require 'socket'
    require 'active_support/core_ext/hash'
    require 'json'
    require "rest-client"
    require 'sensu-plugin/metric/cli'

    class SomeName < Sensu::Plugin::Metric::CLI::Graphite
    option :scheme,
            description: 'Metric naming scheme, text to prepend to metric',
            short: '-s SCHEME',
            long: '--scheme SCHEME',
            default: "#{Socket.gethostname}.stream"

    def run
        response = ""
        begin
        response =::JSON.parse RestClient::Request.execute(method: :get, url: "http://localhost:3001/stats" )
        rescue Exception => e
        critical "#{config[:scheme]}.name Metric check failed, Request returned #{e.message}"
        end
        output "#{config[:scheme]}.somekey", response["somekey"]
        ok
    end
    end

Working with the following class.

class SomeName < Sensu::Plugin::Check::CLI

Seems like something wrong with sense metric plugin, any suggestion would be appreciated.

Answer 1

Fix the issue by calling global method using :: Operators also it does not require to import require 'json' as sensu-plugin come with JSON class.

For a metric, you can subclass one of the following:

Sensu::Plugin::Metric::CLI::JSON

sensu-plugin Checks and Metrics

response =::JSON.parse RestClient::Request.execute(method: :get, url: "http://localhost:3001/stats" )