Examples:
require "right_aws_api"
cw = RightScale::CloudApi::AWS::CW::Manager::new(key, secret, 'https://monitoring.us-east-1.amazonaws.com')
cw.ListMetrics
{"ListMetricsResponse"=>
{"@xmlns"=>"http://monitoring.amazonaws.com/doc/2010-08-01/",
"ListMetricsResult"=>
{"Metrics"=>
{"member"=>
[{"Dimensions"=>
{"member"=>{"Name"=>"InstanceId", "Value"=>"i-29fc074d"}},
"MetricName"=>"DiskReadOps",
"Namespace"=>"AWS/EC2"},
{"Dimensions"=>
{"member"=>
{"Name"=>"QueueName",
"Value"=>"dano7_audit_queue_server_array_test"}},
"MetricName"=>"ApproximateNumberOfMessagesDelayed",
"Namespace"=>"AWS/SQS"},
{"Dimensions"=>
{"member"=>
{"Name"=>"QueueName",
"Value"=>"dano_input_queue_server_array_test"}},
"MetricName"=>"ApproximateNumberOfMessagesNotVisible",
"Namespace"=>"AWS/SQS"}]},
"NextToken"=>
"w9...xhCEA=="},
"ResponseMetadata"=>{"RequestId"=>"bd188949-4f61-11e2-9a69-59e1411d80ca"}}}
cw.DescribeAlarmHistory
{"DescribeAlarmHistoryResponse"=>
{"@xmlns"=>"http://monitoring.amazonaws.com/doc/2010-08-01/",
"DescribeAlarmHistoryResult"=>{"AlarmHistoryItems"=>nil},
"ResponseMetadata"=>{"RequestId"=>"2f087a3b-4f62-11e2-b8d8-754622cf5638"}}}
cw.DescribeAlarmHistory('AlarmName' => 'MyAlarm')