File

util/session.lua @ 13186:affaf6d08d26

util.datamanager: Pad list writes to avoid crossing block boundaries By padding items so that they do not cross block boundaries, it becomes eaiser to delete whole blocks with fallocate() without cutting items in half, improving efficiency of such operations. Since list stores are used for message archives, where the most common deletion operation would be of the oldest entires, at the top of the file. With this, all blocks that contain items to be removed could be deleted without needing to read, delete and write out the whole file.
author Kim Alvefur <zash@zash.se>
date Wed, 07 Jun 2023 00:39:30 +0200
parent 13165:9c13c11b199d
line wrap: on
line source

local initialize_filters = require "prosody.util.filters".initialize;
local time = require "prosody.util.time";
local logger = require "prosody.util.logger";

local function new_session(typ)
	local session = {
		type = typ .. "_unauthed";
		base_type = typ;
		since = time.now();
	};
	return session;
end

local function set_id(session)
	local id = session.base_type .. tostring(session):match("%x+$"):lower();
	session.id = id;
	return session;
end

local function set_logger(session)
	local log = logger.init(session.id);
	session.log = log;
	return session;
end

local function set_conn(session, conn)
	session.conn = conn;
	session.ip = conn:ip();
	return session;
end

local function set_send(session)
	local conn = session.conn;
	if not conn then
		function session.send(data)
			session.log("debug", "Discarding data sent to unconnected session: %s", data);
			return false;
		end
		return session;
	end
	local filter = initialize_filters(session);
	local w = conn.write;
	session.send = function (t)
		if t.name then
			t = filter("stanzas/out", t);
		end
		if t then
			t = filter("bytes/out", tostring(t));
			if t then
				local ret, err = w(conn, t);
				if not ret then
					session.log("debug", "Error writing to connection: %s", err);
					return false, err;
				end
			end
		end
		return true;
	end
	return session;
end

local function set_role(session, role)
	session.role = role;
end

return {
	new = new_session;

	set_id = set_id;
	set_logger = set_logger;
	set_conn = set_conn;
	set_send = set_send;
	set_role = set_role;
}