The repository pattern: binds the index-related API functions to a fixed or computed index.

defmodule Probes do
  use Dowser.Opensearch.Repository,
    only: [search: [:msearch, :search]],
    index: &index_name/1

  def index_name(term) do
    "my_index_#{term}"
  end
end

%{query: %{match_all: %{}}} |> Probes.search(index: "day1")
# searches my_index_day1

Options

• :index (required) — where the repository points:
  • a string or atom (or a list of them): a static index. Index arguments disappear from the generated functions entirely — Probes.get("1"), Probes.search(query) — and any :index option passed by the caller is overwritten.
  • a 1-arity function capture (or fn): a dynamic index. Wherever the underlying API takes an index, the generated function takes a term instead — positionally (Probes.get(term, "1")) or as the :index option (Probes.search(query, index: term), nil when absent) — and the function turns the term into the actual index.
• :only / :except — mutually exclusive filters over the generated functions. Each entry is either a module key alone to select every function of that module, or key: [:fun, ...] for specific ones.

Module keys

OpenSearch spreads the index APIs over more tags than Elasticsearch does, so there are more keys here than the three of dowser_elasticsearch:

Base names select their !/? variants too. Without :only/:except, every index-related function of all ten modules is generated.

Two functions selected from different modules can end up sharing the same base name — count is both a search and a cat endpoint, indices both a cat and a list one. renames/0 below is a fixed table renaming such functions (!/? variants follow the rename); use raises an ArgumentError naming the clash if it finds one that renames/0 does not cover, so the fix is to add an entry there rather than to work around it at the call site.

Only index-related functions can be generated; functions that do not target an index (reindex, scroll, templates, the cluster APIs, the ISM policy CRUD, …) never are — call their module directly.