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根據Push queue in GAE有許多任務請求標頭。如何檢查當前隊列中的任務數量?
X-AppEngine-QueueName, the name of the queue (possibly default)
X-AppEngine-TaskName, the name of the task, or a system-generated unique ID if no name was specified
X-AppEngine-TaskRetryCount, the number of times this task has been retried; for the first attempt, this value is 0. This number includes attempts where the task failed due to a lack of available instances and never reached the execution phase.
X-AppEngine-TaskExecutionCount, the number of times this task has previously failed during the execution phase. This number does not include failures due to a lack of available instances.
X-AppEngine-TaskETA, the target execution time of the task, specified in milliseconds since January 1st 1970.
有沒有辦法檢查已經有多少任務已經入隊?