add multiprocess update daemon

functions.php

@@ -468,12 +468,19 @@
 			_debug("update_rss_feed: start");
 		}
 
-		$result = db_query($link, "SELECT id,update_interval,auth_login,auth_pass,cache_images
+		if (DB_TYPE == "pgsql") {
-			FROM ttrss_feeds WHERE id = '$feed'");
+				$updstart_thresh_qpart = "(ttrss_feeds.last_update_started IS NULL OR ttrss_feeds.last_update_started >= NOW() - INTERVAL '120 seconds')";
+			} else {
+				$updstart_thresh_qpart = "(ttrss_feeds.last_update_started IS NULL OR ttrss_feeds.last_update_started >= DATE_SUB(NOW(), INTERVAL 120 SECOND))";
+			}			
+
+		$result = db_query($link, "SELECT id,update_interval,auth_login,
+			auth_pass,cache_images
+			FROM ttrss_feeds WHERE id = '$feed' AND $updstart_thresh_qpart");
 
 		if (db_num_rows($result) == 0) {
 			if (defined('DAEMON_EXTENDED_DEBUG') || $_GET['xdebug']) {
-				_debug("update_rss_feed: feed $feed [$feed_url] NOT FOUND");
+				_debug("update_rss_feed: feed $feed [$feed_url] NOT FOUND/SKIPPED");
 			}		
 			return;
 		}

update_daemon2.php

@@ -0,0 +1,55 @@
+#!/usr/bin/php
+<?php
+	// This is an experimental multiprocess update daemon
+	// It consists of the master server (this file) and
+	// client batch script (update_daemon2_client.php) which
+	// should only be run by the server process
+
+	declare(ticks = 1);
+
+	require "config.php";
+
+	define('MAX_JOBS', 2);
+	define('CLIENT_PROCESS', './update_daemon2_client.php SRV_RUN_OK');
+	define('SPAWN_INTERVAL', DAEMON_SLEEP_INTERVAL);
+
+	$running_jobs = 0;
+	$last_checkpoint = -1;
+
+	function sigchld_handler($signal) {
+		global $running_jobs;
+		if ($running_jobs > 0) $running_jobs--;
+		print posix_getpid() . ": SIGCHLD received, jobs left: $running_jobs\n";
+		pcntl_waitpid(-1, $status, WNOHANG);
+	}
+
+	pcntl_signal(SIGCHLD, 'sigchld_handler');
+
+	while (true) {
+
+		$next_spawn = $last_checkpoint + SPAWN_INTERVAL - time();
+
+		print "[MASTER] active jobs: $running_jobs, next spawn at $next_spawn sec\n";
+
+		if ($last_checkpoint + SPAWN_INTERVAL < time()) {
+
+			for ($j = $running_jobs; $j < MAX_JOBS; $j++) {
+				print "[MASTER] spawning client $j...";
+				$pid = pcntl_fork();
+				if ($pid == -1) {
+					die("fork failed!\n");
+				} else if ($pid) {
+					$running_jobs++;
+					print "OK [$running_jobs]\n";
+				} else {
+					pcntl_signal(SIGCHLD, SIG_IGN);
+					passthru(CLIENT_PROCESS);
+					exit(0);
+				}
+			}
+			$last_checkpoint = time();
+		}
+		sleep(1);
+	}
+
+?>

update_daemon2_client.php

@@ -0,0 +1,161 @@
+#!/usr/bin/php
+<?php
+	// define('DEFAULT_ERROR_LEVEL', E_ALL);
+	define('DEFAULT_ERROR_LEVEL', E_ERROR | E_WARNING | E_PARSE);
+
+	if ($argv[1] != "SRV_RUN_OK") {
+		die("This script should be started by update_daemon2.php.\n");
+	}
+
+	declare(ticks = 1);
+
+	define('MAGPIE_CACHE_DIR', '/var/tmp/magpie-ttrss-cache-daemon');
+	define('SIMPLEPIE_CACHE_DIR',	'/var/tmp/simplepie-ttrss-cache-daemon');
+	define('DISABLE_SESSIONS', true);
+
+	require_once "version.php";
+
+	if (strpos(VERSION, ".99") !== false) {
+		define('DAEMON_EXTENDED_DEBUG', true);
+	}
+
+	define('PURGE_INTERVAL', 3600); // seconds
+
+	require_once "sanity_check.php";
+	require_once "config.php";
+
+	if (!ENABLE_UPDATE_DAEMON) {
+		die("Please enable option ENABLE_UPDATE_DAEMON in config.php\n");
+	}
+	
+	require_once "db.php";
+	require_once "db-prefs.php";
+	require_once "functions.php";
+	require_once "magpierss/rss_fetch.inc";
+
+	error_reporting(DEFAULT_ERROR_LEVEL);
+
+	function sigalrm_handler() {
+		die("received SIGALRM, hang in feed update?\n");
+	}
+
+	pcntl_signal(SIGALRM, sigalrm_handler);
+
+	$link = db_connect(DB_HOST, DB_USER, DB_PASS, DB_NAME);	
+
+	if (!$link) {
+		if (DB_TYPE == "mysql") {
+			print mysql_error();
+		}
+		// PG seems to display its own errors just fine by default.		
+		return;
+	}
+
+	if (DB_TYPE == "pgsql") {
+		pg_query("set client_encoding = 'utf-8'");
+		pg_set_client_encoding("UNICODE");
+	} else {
+		if (defined('MYSQL_CHARSET') && MYSQL_CHARSET) {
+			db_query($link, "SET NAMES " . MYSQL_CHARSET);
+//			db_query($link, "SET CHARACTER SET " . MYSQL_CHARSET);
+		}
+	}
+
+	$last_purge = 0;
+
+//	if (!make_stampfile('update_daemon.stamp')) {
+//		print "error: unable to create stampfile";
+//		die;
+//	}
+
+	if (time() - $last_purge > PURGE_INTERVAL) {
+		_debug("Purging old posts (random 30 feeds)...");
+		global_purge_old_posts($link, true, 30);
+		$last_purge = time();
+	}
+
+	// Process all other feeds using last_updated and interval parameters
+
+	$random_qpart = sql_random_function();
+		
+	if (DAEMON_UPDATE_LOGIN_LIMIT > 0) {
+		if (DB_TYPE == "pgsql") {
+			$login_thresh_qpart = "AND ttrss_users.last_login >= NOW() - INTERVAL '".DAEMON_UPDATE_LOGIN_LIMIT." days'";
+		} else {
+			$login_thresh_qpart = "AND ttrss_users.last_login >= DATE_SUB(NOW(), INTERVAL ".DAEMON_UPDATE_LOGIN_LIMIT." DAY)";
+		}			
+	} else {
+		$login_thresh_qpart = "";
+	}
+
+	if (DB_TYPE == "pgsql") {
+		$update_limit_qpart = "AND ttrss_feeds.last_updated < NOW() - INTERVAL '".(DAEMON_SLEEP_INTERVAL*2)." seconds'";
+	} else {
+		$update_limit_qpart = "AND ttrss_feeds.last_updated < DATE_SUB(NOW(), INTERVAL ".(DAEMON_SLEEP_INTERVAL*2)." SECOND)";
+	}
+
+	if (DB_TYPE == "pgsql") {
+			$updstart_thresh_qpart = "AND (ttrss_feeds.last_update_started IS NULL OR ttrss_feeds.last_update_started >= NOW() - INTERVAL '120 seconds')";
+		} else {
+			$updstart_thresh_qpart = "AND (ttrss_feeds.last_update_started IS NULL OR ttrss_feeds.last_update_started >= DATE_SUB(NOW(), INTERVAL 120 SECOND))";
+		}			
+
+	$result = db_query($link, "SELECT feed_url,ttrss_feeds.id,owner_uid,
+			SUBSTRING(last_updated,1,19) AS last_updated,
+			update_interval 
+		FROM 
+			ttrss_feeds,ttrss_users 
+		WHERE 
+			ttrss_users.id = owner_uid $login_thresh_qpart $update_limit_qpart 
+			$updstart_thresh_qpart
+		ORDER BY $random_qpart DESC LIMIT " . DAEMON_FEED_LIMIT);
+
+	$user_prefs_cache = array();
+
+	_debug(sprintf("Scheduled %d feeds to update...\n", db_num_rows($result)));
+	
+	while ($line = db_fetch_assoc($result)) {
+
+		$upd_intl = $line["update_interval"];
+		$user_id = $line["owner_uid"];
+
+		if (!$upd_intl || $upd_intl == 0) {
+			if (!$user_prefs_cache[$user_id]['DEFAULT_UPDATE_INTERVAL']) {			
+				$upd_intl = get_pref($link, 'DEFAULT_UPDATE_INTERVAL', $user_id);
+				$user_prefs_cache[$user_id]['DEFAULT_UPDATE_INTERVAL'] = $upd_intl;
+			} else {
+				$upd_intl = $user_prefs_cache[$user_id]['DEFAULT_UPDATE_INTERVAL'];
+			}
+		}
+
+		if ($upd_intl < 0) { 
+#				print "Updates disabled.\n";
+			continue; 
+		}
+
+		_debug("Feed: " . $line["feed_url"] . ", " . $line["last_updated"]);
+
+//			_debug(sprintf("\tLU: %d, INTL: %d, UID: %d) ", 
+//				time() - strtotime($line["last_updated"]), $upd_intl*60, $user_id));
+
+		if (!$line["last_updated"] || 
+			time() - strtotime($line["last_updated"]) > ($upd_intl * 60)) {
+
+			_debug("Updating...");
+
+			pcntl_alarm(300);
+
+			update_rss_feed($link, $line["feed_url"], $line["id"], true);	
+
+			pcntl_alarm(0);
+
+			sleep(1); // prevent flood (FIXME make this an option?)
+		} else {
+			_debug("Update not needed.");
+		}
+	}
+
+	if (DAEMON_SENDS_DIGESTS) send_headlines_digests($link);
+
+	db_close($link);
+?>