Elastix

A DSL-free Elasticsearch client for Elixir.

Documentation

Even though the documentation is pretty scarce right now, we’re working on improving it. If you want to help with that you’re definitely welcome. 🤗

This README contains most of the information you should need to get started, if you can’t find what you’re looking for, either look at the tests or file an issue!

Installation

Add :elastix to your list of dependencies in mix.exs:

def deps do
  [
    {:elastix, ">= 0.0.0"}
  ]
end

Then run mix deps.get to fetch the new dependency.

Examples

Creating an Elasticsearch index

Elastix.Index.create("http://localhost:9200", "twitter", %{})

Map, Index, Search and Delete

elastic_url = "http://localhost:9200"
data = %{
    user: "kimchy",
    post_date: "2009-11-15T14:12:12",
    message: "trying out Elastix"
}
mapping = %{
  properties: %{
    user: %{type: "text"},
    post_date: %{type: "date"},
    message: %{type: "text"}
  }
}
Elastix.Mapping.put(elastic_url, "twitter", "tweet", mapping)
Elastix.Document.index(elastic_url, "twitter", "tweet", "42", data)
Elastix.Search.search(elastic_url, "twitter", ["tweet"], %{})
Elastix.Document.delete(elastic_url, "twitter", "tweet", "42")

Bulk requests

Bulk requests take as parameter a list of the lines you want to send to the _bulk endpoint.

You can also specify the following options:

index the index of the request
type the document type of the request. (you can’t specify type without specifying index)
httpoison_options configuration directly passed to httpoison methods. Same options that can be passed on config file

lines = [
  %{index: %{_id: "1"}},
  %{field: "value1"},
  %{index: %{_id: "2"}},
  %{field: "value2"}
]
Elastix.Bulk.post(elastic_url, lines, index: "my_index", type: "my_type", httpoison_options: [timeout: 180_000])
# You can also send raw data:
data = Enum.map(lines, fn line -> Poison.encode!(line) <> "\n" end)
Elastix.Bulk.post_raw(elastic_url, data, index: "my_index", type: "my_type")

Configuration

Shield

config :elastix,
  shield: true,
  username: "username",
  password: "password",

Poison (or any other JSON library) and HTTPoison

config :elastix,
  json_options: [keys: :atoms!],
  httpoison_options: [hackney: [pool: :elastix_pool]]

Note that you can configure Elastix to use any JSON library, see the “Custom JSON codec” page for more info.

Custom headers

config :elastix,
  custom_headers: {MyModule, :add_aws_signature, ["us-east"]}

custom_headers must be a tuple of the type {Module, :function, [args]}, where :function is a function that should accept the request (a map of this type: %{method: String.t, headers: [], url: String.t, body: String.t}) as its first parameter and return a list of the headers you want to send:

defmodule MyModule do
  def add_aws_signature(request, region) do
    [{"Authorization", generate_aws_signature(request, region)} | request.headers]
  end
  defp generate_aws_signature(request, region) do
    # See: https://github.com/bryanjos/aws_auth or similar
  end
end

Running tests

You need Elasticsearch running locally on port 9200. A quick way of doing so is via Docker:

$ docker run -p 9200:9200 -it --rm elasticsearch:5.1.2

Then clone the repo and fetch its dependencies:

$ git clone git@github.com:werbitzky/elastix.git
$ cd elastix
$ mix deps.get
$ mix test