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Active Job Core ↑

提供了将包含在每个继承自 ActiveJob::Base 的 Active Job 对象中的通用行为。

命名空间
方法
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Attributes

[RW] arguments

任务参数
[RW] enqueue_error

跟踪后端引发的任何异常，以便调用者可以检查错误。
[RW] enqueued_at

跟踪任务何时入队
[RW] exception_executions

包含此任务处理每个特定 retry_on 声明的错误次数的 Hash。键是 retry_on 声明中列出的异常的字符串表示形式，而关联的值保存相应 retry_on 声明处理其中一个列出异常的执行次数。
[RW] executions

此任务已执行的次数（每次重试时都会增加，例如在发生异常后）。
[RW] job_id

任务标识符
[RW] locale

在任务期间使用的 I18n.locale。
[W] priority

任务的优先级（数字越小，优先级越高）。
[RW] provider_job_id

适配器可选提供的 ID
[W] queue_name

任务将驻留的队列。
[RW] scheduled_at

任务应执行的 Time
[W] serialized_arguments
[RW] timezone

在任务期间使用的时区。

类公共方法

new(*arguments)

创建一个新的任务实例。接受将传递给 perform 方法的参数。

Source: show | on GitHub

# File activejob/lib/active_job/core.rb, line 103
def initialize(*arguments)
  @arguments  = arguments
  @job_id     = SecureRandom.uuid
  @queue_name = self.class.queue_name
  @scheduled_at = nil
  @priority   = self.class.priority
  @executions = 0
  @exception_executions = {}
  @timezone   = Time.zone&.name
end

实例公共方法

deserialize(job_data)

将存储的任务数据附加到当前实例。接收 serialize 返回的哈希

Examples ↑

class DeliverWebhookJob < ActiveJob::Base
  attr_writer :attempt_number

  def attempt_number
    @attempt_number ||= 0
  end

  def serialize
    super.merge('attempt_number' => attempt_number + 1)
  end

  def deserialize(job_data)
    super
    self.attempt_number = job_data['attempt_number']
  end

  rescue_from(Timeout::Error) do |exception|
    raise exception if attempt_number > 5
    retry_job(wait: 10)
  end
end

Source: show | on GitHub

# File activejob/lib/active_job/core.rb, line 160
def deserialize(job_data)
  self.job_id               = job_data["job_id"]
  self.provider_job_id      = job_data["provider_job_id"]
  self.queue_name           = job_data["queue_name"]
  self.priority             = job_data["priority"]
  self.serialized_arguments = job_data["arguments"]
  self.executions           = job_data["executions"]
  self.exception_executions = job_data["exception_executions"]
  self.locale               = job_data["locale"] || I18n.locale.to_s
  self.timezone             = job_data["timezone"] || Time.zone&.name
  self.enqueued_at          = deserialize_time(job_data["enqueued_at"]) if job_data["enqueued_at"]
  self.scheduled_at         = deserialize_time(job_data["scheduled_at"]) if job_data["scheduled_at"]
end

serialize()

返回一个包含任务数据的哈希，该哈希可以安全地传递给队列适配器。

Source: show | on GitHub

# File activejob/lib/active_job/core.rb, line 117
def serialize
  {
    "job_class"  => self.class.name,
    "job_id"     => job_id,
    "provider_job_id" => provider_job_id,
    "queue_name" => queue_name,
    "priority"   => priority,
    "arguments"  => serialize_arguments_if_needed(arguments),
    "executions" => executions,
    "exception_executions" => exception_executions,
    "locale"     => locale || I18n.locale.to_s,
    "timezone"   => timezone,
    "enqueued_at" => Time.now.utc.iso8601(9),
    "scheduled_at" => scheduled_at ? scheduled_at.utc.iso8601(9) : nil,
  }
end

successfully_enqueued?()

Source: show | on GitHub

# File activejob/lib/active_job/core.rb, line 58
def successfully_enqueued?
  @successfully_enqueued
end