Provides functionality to store user, tags, extra, and breadcrumbs context when an event is reported. The contexts will be fetched and merged into the event when it is sent.

When calling Sentry.Context, the Process Dictionary is used to store this state. This imposes some limitations. The state will only exist within the current process, and the context will die with the process.

For example, if you add context inside your controller and an error happens in a Task, that context will not be included.

A common use-case is to set context within Plug or Phoenix applications, as each request is its own process, and so any stored context will be included should an error be reported within that request process. Example:

# post_controller.ex
def index(conn, _params) do
  Sentry.Context.set_user_context(%{id: conn.assigns.user_id})
  posts = Blog.list_posts()
  render(conn, "index.html", posts: posts)
end