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Step flow manager for Elixir applications
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lib/step_flow/amqp/worker_initialized_consumer.ex
defmodule StepFlow.Amqp.WorkerInitializedConsumer do
@moduledoc """
Consumer of all worker inits.
"""
import Ecto.Query, warn: false
require Logger
alias StepFlow.Amqp.WorkerInitializedConsumer
alias StepFlow.Jobs
alias StepFlow.Jobs.Job
alias StepFlow.Jobs.Status
alias StepFlow.Notifications.NotificationManager
alias StepFlow.Repo
alias StepFlow.Repo.Checker
alias StepFlow.Workflows.StepManager
use StepFlow.Amqp.CommonConsumer, %{
queue: "worker_initialized",
exchange: "worker_response",
prefetch_count: 1,
consumer: &WorkerInitializedConsumer.consume/4
}
@doc """
Consume worker initialized message.
"""
def consume(
channel,
tag,
_redelivered,
%{
"job_id" => job_id
} = _payload
) do
if Checker.repo_running?() do
case Status.set_job_status(job_id, "ready_to_start") do
{:ok, _} ->
query = from(job in Job, select: job.id)
stream = Repo.stream(query)
Repo.transaction(fn ->
Enum.to_list(stream)
end)
:timer.sleep(5000)
NotificationManager.notification_from_job(job_id)
case Jobs.get_job(job_id) do
nil ->
Basic.nack(channel, tag, requeue: false)
job ->
if job.is_live do
StepManager.check_step_status(%{job_id: job_id})
end
Basic.ack(channel, tag)
end
{:error, message} ->
Logger.error("Cannot set job status: #{inspect(message)}")
Basic.nack(channel, tag, requeue: false)
end
else
Logger.warn(
"#{__MODULE__}: The database is not available, reject and requeue consumed message..."
)
Basic.reject(channel, tag, requeue: true)
end
end
def consume(channel, tag, _redelivered, payload) do
Logger.error("Worker initialized #{inspect(payload)}")
Basic.reject(channel, tag, requeue: false)
end
end