Viktor Baranov
4 years ago
parent
09889e2506
commit
32663bc027
@ -0,0 +1,52 @@ |
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defmodule Explorer.Chain.Cache.MinMissingBlockNumber do |
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@moduledoc """ |
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Caches min missing block number (break in the chain). |
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""" |
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use GenServer |
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alias Explorer.Chain |
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@doc """ |
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Starts a process to periodically update the % of blocks indexed. |
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""" |
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@spec start_link(term()) :: GenServer.on_start() |
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def start_link(_) do |
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GenServer.start_link(__MODULE__, :ok, name: __MODULE__) |
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end |
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@impl true |
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def init(args) do |
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Task.start_link(&fetch_min_missing_block/0) |
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schedule_next_consolidation() |
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{:ok, args} |
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end |
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def fetch_min_missing_block do |
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result = Chain.fetch_min_missing_block_cache() |
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if result > 0 do |
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params = %{ |
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counter_type: "min_missing_block_number", |
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value: result |
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} |
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Chain.upsert_last_fetched_counter(params) |
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end |
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end |
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defp schedule_next_consolidation do |
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Process.send_after(self(), :fetch_min_missing_block, :timer.minutes(20)) |
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end |
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@impl true |
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def handle_info(:fetch_min_missing_block, state) do |
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fetch_min_missing_block() |
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schedule_next_consolidation() |
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{:noreply, state} |
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end |
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end |
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@ -0,0 +1,12 @@ |
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defmodule Explorer.Repo.Migrations.MinMissingBlockNumber do |
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use Ecto.Migration |
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def change do |
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insert_initial_genesis_block = """ |
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INSERT INTO last_fetched_counters (counter_type, value, inserted_at, updated_at) |
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VALUES ('min_missing_block_number', 0, NOW(), NOW()); |
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""" |
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execute(insert_initial_genesis_block) |
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end |
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end |
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