94 lines
2.4 KiB
Elixir
94 lines
2.4 KiB
Elixir
defmodule Graph.Cache do
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@moduledoc false
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use Nebulex.Cache,
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otp_app: :backend,
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adapter: Nebulex.Adapters.Local
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alias Backend.{Api, Crawl, Edge, Instance, MostRecentCrawl, Repo}
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alias __MODULE__
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require Logger
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import Ecto.Query
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@spec get_graph(String.t() | nil) :: %{
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nodes: [Instance.t()],
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edges: [Edge.t()]
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}
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def get_graph(domain \\ nil) do
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key =
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if domain != nil do
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"graph_" <> domain
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else
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"graph"
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end
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case Cache.get(key) do
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nil ->
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Appsignal.increment_counter("graph_cache.misses", 1)
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Logger.debug("Graph cache: miss")
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nodes = Api.list_nodes(domain)
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edges = Api.list_edges(domain)
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# Cache for 10 minutes
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Cache.set(key, %{nodes: nodes, edges: edges}, ttl: 600)
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%{nodes: nodes, edges: edges}
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data ->
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Appsignal.increment_counter("graph_cache.hits", 1)
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Logger.debug("Graph cache: hit")
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data
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end
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end
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@spec get_instance_with_relationships(String.t()) :: Instance.t()
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def get_instance_with_relationships(domain) do
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key = "instance_" <> domain
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case Cache.get(key) do
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nil ->
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Appsignal.increment_counter("instance_cache.misses", 1)
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Logger.debug("Instance cache: miss")
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instance = Api.get_instance_with_relationships(domain)
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# Cache for five minutes
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Cache.set(key, instance, ttl: 300)
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instance
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data ->
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Appsignal.increment_counter("instance_cache.hits", 1)
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Logger.debug("Instance cache: hit")
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data
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end
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end
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@spec get_last_crawl(String.t()) :: Crawl.t() | nil
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def get_last_crawl(domain) do
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key = "most_recent_crawl_" <> domain
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most_recent_crawl_subquery =
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MostRecentCrawl
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|> select([mrc], %{
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most_recent_id: mrc.crawl_id
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})
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|> where([mrc], mrc.instance_domain == ^domain)
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case Cache.get(key) do
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nil ->
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Appsignal.increment_counter("most_recent_crawl_cache.misses", 1)
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Logger.debug("Most recent crawl cache: miss")
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crawl =
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Crawl
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|> join(:inner, [c], mrc in subquery(most_recent_crawl_subquery),
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on: c.id == mrc.most_recent_id
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)
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|> Repo.one()
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# Cache for five minutes
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Cache.set(key, crawl, ttl: 300)
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data ->
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Appsignal.increment_counter("most_recent_crawl_cache.hits", 1)
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Logger.debug("Most recent crawl cache: hit")
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data
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end
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end
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end
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