Merge pull request #78 from Bluetab/feature/bulk-index-action

Bulk "index" action and HEAD support

README.md

@@ -100,6 +100,10 @@ config :my_app, MyApp.ElasticsearchCluster,
       # Likewise, wait a given period between posting pages to give
       # Elasticsearch time to catch up.
       bulk_wait_interval: 15_000 # 15 seconds
+
+      # By default bulk indexing uses the "create" action. To allow existing
+      # documents to be replaced, use the "index" action instead.
+      bulk_action: "create"
     }
   }
 ```

lib/elasticsearch.ex

@@ -425,6 +425,61 @@ defmodule Elasticsearch do
     |> unwrap!()
   end
 
+  @doc """
+  Determines whether a resource exists at a given Elasticsearch path
+
+  ## Examples
+
+      iex> Index.create_from_file(Cluster, "posts", "test/support/settings/posts.json")
+      ...> Elasticsearch.head(Cluster, "/posts")
+      {:ok, ""}
+
+  It returns an error if the given resource does not exist.
+
+      iex> Elasticsearch.head(Cluster, "/nonexistent")
+      {:error,
+      %Elasticsearch.Exception{
+        col: nil,
+        line: nil,
+        message: "",
+        query: nil,
+        raw: nil,
+        status: nil,
+        type: nil
+      }}
+  """
+  @spec head(Cluster.t(), url) :: response
+  @spec head(Cluster.t(), url, opts) :: response
+  def head(cluster, url, opts \\ []) do
+    config = Config.get(cluster)
+
+    config
+    |> config.api.request(:head, url, "", opts)
+    |> format()
+  end
+
+  @doc """
+  Same as `head/1`, but returns the response and raises errors.
+
+  ## Examples
+
+      iex> Index.create_from_file(Cluster, "posts", "test/support/settings/posts.json")
+      ...> Elasticsearch.head!(Cluster, "/posts")
+      ""
+
+  Raises an error if the resource is invalid.
+
+      iex> Elasticsearch.head!(Cluster, "/nonexistent")
+      ** (Elasticsearch.Exception)
+  """
+  @spec head!(Cluster.t(), url) :: map | no_return
+  @spec head!(Cluster.t(), url, opts) :: map | no_return
+  def head!(cluster, url, opts \\ []) do
+    cluster
+    |> head(url, opts)
+    |> unwrap!()
+  end
+
   defp format({:ok, %{status_code: code, body: body}})
        when code >= 200 and code < 300 do
     {:ok, body}

lib/elasticsearch/api/api.ex

@@ -4,7 +4,7 @@ defmodule Elasticsearch.API do
   """
 
   @typedoc "An HTTP method"
-  @type method :: :get | :put | :post | :delete
+  @type method :: :get | :put | :post | :delete | :head
 
   @typedoc "The URL to request from the API"
   @type url :: String.t()

lib/elasticsearch/cluster/config.ex

@@ -73,7 +73,7 @@ defmodule Elasticsearch.Cluster.Config do
   defp validate_index({_name, settings}) do
     Vex.validate(
       settings,
-      settings: [presence: true, by: &is_binary/1],
+      settings: [by: &(is_binary(&1) or is_map(&1))],
       store: [presence: true, by: &is_module/1],
       sources: [
         presence: true,

lib/elasticsearch/indexing/bulk.ex

@@ -27,11 +27,11 @@ defmodule Elasticsearch.Index.Bulk do
         %Protocol.UndefinedError{description: "",
         protocol: Elasticsearch.Document, value: 123}}
   """
-  @spec encode(Cluster.t(), struct, String.t()) ::
+  @spec encode(Cluster.t(), struct, String.t(), String.t()) ::
           {:ok, String.t()}
           | {:error, Error.t()}
-  def encode(cluster, struct, index) do
-    {:ok, encode!(cluster, struct, index)}
+  def encode(cluster, struct, index, action \\ "create") do
+    {:ok, encode!(cluster, struct, index, action)}
   rescue
     exception ->
       {:error, exception}
@@ -51,9 +51,9 @@ defmodule Elasticsearch.Index.Bulk do
       iex> Bulk.encode!(Cluster, 123, "my-index")
       ** (Protocol.UndefinedError) protocol Elasticsearch.Document not implemented for 123 of type Integer
   """
-  def encode!(cluster, struct, index) do
+  def encode!(cluster, struct, index, action \\ "create") do
     config = Cluster.Config.get(cluster)
-    header = header(config, "create", index, struct)
+    header = header(config, action, index, struct)
 
     document =
       struct
@@ -99,16 +99,17 @@ defmodule Elasticsearch.Index.Bulk do
     config = Cluster.Config.get(cluster)
     bulk_page_size = index_config[:bulk_page_size] || 5000
     bulk_wait_interval = index_config[:bulk_wait_interval] || 0
+    action = index_config[:bulk_action] || "create"
 
     errors =
       store.transaction(fn ->
         source
         |> store.stream()
-        |> Stream.map(&encode!(config, &1, index_name))
+        |> Stream.map(&encode!(config, &1, index_name, action))
         |> Stream.chunk_every(bulk_page_size)
         |> Stream.intersperse(bulk_wait_interval)
         |> Stream.map(&put_bulk_page(config, index_name, &1))
-        |> Enum.reduce(errors, &collect_errors/2)
+        |> Enum.reduce(errors, &collect_errors(&1, &2, action))
       end)
 
     upload(config, index_name, %{index_config | sources: tail}, errors)
@@ -123,21 +124,21 @@ defmodule Elasticsearch.Index.Bulk do
     Elasticsearch.put(config, "/#{index_name}/_doc/_bulk", Enum.join(items))
   end
 
-  defp collect_errors({:ok, %{"errors" => true} = response}, errors) do
+  defp collect_errors({:ok, %{"errors" => true} = response}, errors, action) do
     new_errors =
       response["items"]
-      |> Enum.filter(&(&1["create"]["error"] != nil))
-      |> Enum.map(& &1["create"])
+      |> Enum.filter(&(&1[action]["error"] != nil))
+      |> Enum.map(& &1[action])
       |> Enum.map(&Elasticsearch.Exception.exception(response: &1))
 
     new_errors ++ errors
   end
 
-  defp collect_errors({:error, error}, errors) do
+  defp collect_errors({:error, error}, errors, _action) do
     [error | errors]
   end
 
-  defp collect_errors(_response, errors) do
+  defp collect_errors(_response, errors, _action) do
     errors
   end
 end

lib/elasticsearch/indexing/index.ex

@@ -30,9 +30,9 @@ defmodule Elasticsearch.Index do
     alias = alias_to_atom(alias)
     name = build_name(alias)
     config = Config.get(cluster)
-    %{settings: settings_file} = index_config = config[:indexes][alias]
+    %{settings: settings} = index_config = config[:indexes][alias]
 
-    with :ok <- create_from_file(config, name, settings_file),
+    with :ok <- create_from_settings(config, name, settings),
          :ok <- Bulk.upload(config, name, index_config),
          :ok <- __MODULE__.alias(config, name, to_string(alias)),
          :ok <- clean_starting_with(config, to_string(alias), 2),
@@ -273,6 +273,31 @@ defmodule Elasticsearch.Index do
     end
   end
 
+  @doc """
+  Creates an index with the given name, with settings loaded from a map or a JSON file (see `create_from_file/3`).
+
+  ## Example
+
+      iex> Index.create_from_settings(Cluster, "posts-1", %{})
+      :ok
+
+      iex> Index.create_from_settings(Cluster, "posts-1", "nonexistent.json")
+      {:error, :enoent}
+  """
+  @spec create_from_settings(Cluster.t(), String.t(), map | Path.t()) ::
+          :ok
+          | {:error, File.posix()}
+          | {:error, Elasticsearch.Exception.t()}
+  def create_from_settings(cluster, name, settings)
+
+  def create_from_settings(cluster, name, settings) when is_map(settings) do
+    create(cluster, name, settings)
+  end
+
+  def create_from_settings(cluster, name, file) do
+    create_from_file(cluster, name, file)
+  end
+
   @doc """
   Generates a name for an index that will be aliased to a given `alias`.
   Similar to migrations, the name will contain a timestamp.

test/elasticsearch/cluster/cluster_test.exs

@@ -103,7 +103,7 @@ defmodule Elasticsearch.ClusterTest do
     test "validates indexes" do
       errors = errors_on(%{valid_config() | indexes: %{example: %{}}})
 
-      for field <- [:settings, :store, :sources, :bulk_page_size, :bulk_wait_interval] do
+      for field <- [:store, :sources, :bulk_page_size, :bulk_wait_interval] do
         assert {"must be present", validation: :presence} in errors[field]
       end