Nope. PreBuiltTransportClient is provided in elasticsearch jar.
In your settings, I'd just keep:
settings.put("client.transport.sniff", config.getBoolean("client.transport.sniff", true));
settings.put("client.transport.ping_timeout", config.get("client.transport.ping_timeout", "10s"));
settings.put("client.transport.nodes_sampler_interval", config.get("client.transport.nodes_sampler_interval", "10s"));
And please format your code using </> icon as explained in this guide. It will make your post more readable.
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