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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 |
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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; }