EP_WP_Query_Integration::setup PHP Method

    public function setup()
    {
        // Ensure that we are currently allowing ElasticPress to override the normal WP_Query
        if (ep_is_indexing()) {
            return;
        }
        // Make sure we return nothing for MySQL posts query
        add_filter('posts_request', array($this, 'filter_posts_request'), 10, 2);
        // Add header
        add_action('pre_get_posts', array($this, 'action_pre_get_posts'), 5);
        // Nukes the FOUND_ROWS() database query
        add_filter('found_posts_query', array($this, 'filter_found_posts_query'), 5, 2);
        // Query and filter in EP_Posts to WP_Query
        add_filter('the_posts', array($this, 'filter_the_posts'), 10, 2);
        // Ensure we're in a loop before we allow blog switching
        add_action('loop_start', array($this, 'action_loop_start'), 10, 1);
        // Properly restore blog if necessary
        add_action('loop_end', array($this, 'action_loop_end'), 10, 1);
        // Properly switch to blog if necessary
        add_action('the_post', array($this, 'action_the_post'), 10, 1);
    }