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authorWu Cheng-Han2016-11-16 13:58:54 +0800
committerWu Cheng-Han2016-11-16 13:58:54 +0800
commit7adb78aba81a2ac9b87d82d7d879b70d315cf8e8 (patch)
treee118d562d65ff6f828e966eb240e35dc428f0e04
parentc5de552988810766ad56f0ea1550bb1c6d5f5a2a (diff)
Revert "Add workers for history to leverage CPU intensive work loading"
This reverts commit b5920fbbd1ceb595456da18f7d458b63d1a960bf.
Diffstat (limited to '')
-rw-r--r--lib/history.js79
-rw-r--r--lib/workers/historyUpdater.js66
2 files changed, 46 insertions, 99 deletions
diff --git a/lib/history.js b/lib/history.js
index bdc922d7..4a3bbe1e 100644
--- a/lib/history.js
+++ b/lib/history.js
@@ -2,7 +2,6 @@
//external modules
var async = require('async');
var moment = require('moment');
-var childProcess = require('child_process');
//core
var config = require("./config.js");
@@ -10,9 +9,6 @@ var logger = require("./logger.js");
var response = require("./response.js");
var models = require("./models");
-// workers
-var historyUpdater = require("./workers/historyUpdater");
-
//public
var History = {
historyGet: historyGet,
@@ -24,50 +20,49 @@ var History = {
var caches = {};
//update when the history is dirty
-var updaterIsBusy = false;
var updater = setInterval(function () {
- if (updaterIsBusy) return;
var deleted = [];
- var _caches = {};
- Object.keys(caches).forEach(function (key) {
+ async.each(Object.keys(caches), function (key, callback) {
var cache = caches[key];
if (cache.isDirty) {
- _caches[key] = cache.history;
- cache.isDirty = false;
+ if (config.debug) logger.info("history updater found dirty history: " + key);
+ var history = parseHistoryToArray(cache.history);
+ finishUpdateHistory(key, history, function (err, count) {
+ if (err) return callback(err, null);
+ if (!count) return callback(null, null);
+ cache.isDirty = false;
+ cache.updateAt = Date.now();
+ return callback(null, null);
+ });
} else {
if (moment().isAfter(moment(cache.updateAt).add(5, 'minutes'))) {
deleted.push(key);
}
+ return callback(null, null);
}
+ }, function (err) {
+ if (err) return logger.error('history updater error', err);
});
// delete specified caches
for (var i = 0, l = deleted.length; i < l; i++) {
caches[deleted[i]].history = {};
delete caches[deleted[i]];
}
- if (Object.keys(_caches).length <= 0) return;
- updaterIsBusy = true;
- var worker = childProcess.fork("./lib/workers/historyUpdater.js");
- if (config.debug) logger.info('history updater worker process started');
- worker.send({
- msg: 'update history',
- caches: _caches
- });
- worker.on('message', function (data) {
- if (!data || !data.msg || !data.userid) return;
- var cache = caches[data.userid];
- if (!cache) return;
- switch(data.msg) {
- case 'check':
- cache.updateAt = Date.now();
- break;
+}, 1000);
+
+function finishUpdateHistory(userid, history, callback) {
+ models.User.update({
+ history: JSON.stringify(history)
+ }, {
+ where: {
+ id: userid
}
+ }).then(function (count) {
+ return callback(null, count);
+ }).catch(function (err) {
+ return callback(err, null);
});
- worker.on('close', function (code) {
- updaterIsBusy = false;
- if (config.debug) logger.info('history updater worker process exited with code ' + code);
- });
-}, 1000);
+}
function isReady() {
var dirtyCount = 0;
@@ -106,7 +101,7 @@ function getHistory(userid, callback) {
}
function setHistory(userid, history) {
- if (Array.isArray(history)) history = historyUpdater.parseHistoryToObject(history);
+ if (Array.isArray(history)) history = parseHistoryToObject(history);
if (!caches[userid]) {
caches[userid] = {
history: {},
@@ -135,13 +130,31 @@ function updateHistory(userid, noteId, document) {
}
}
+function parseHistoryToArray(history) {
+ var _history = [];
+ Object.keys(history).forEach(function (key) {
+ var item = history[key];
+ _history.push(item);
+ });
+ return _history;
+}
+
+function parseHistoryToObject(history) {
+ var _history = {};
+ for (var i = 0, l = history.length; i < l; i++) {
+ var item = history[i];
+ _history[item.id] = item;
+ }
+ return _history;
+}
+
function historyGet(req, res) {
if (req.isAuthenticated()) {
getHistory(req.user.id, function (err, history) {
if (err) return response.errorInternalError(res);
if (!history) return response.errorNotFound(res);
res.send({
- history: historyUpdater.parseHistoryToArray(history)
+ history: parseHistoryToArray(history)
});
});
} else {
diff --git a/lib/workers/historyUpdater.js b/lib/workers/historyUpdater.js
deleted file mode 100644
index df80e92d..00000000
--- a/lib/workers/historyUpdater.js
+++ /dev/null
@@ -1,66 +0,0 @@
-// external modules
-var async = require('async');
-
-// core
-var config = require("../config.js");
-var logger = require("../logger.js");
-var models = require("../models");
-
-process.on('message', function (data) {
- if (!data || !data.msg || data.msg !== 'update history' || !data.caches) return process.exit();
- var caches = data.caches;
- async.each(Object.keys(caches), function (key, callback) {
- var cache = caches[key];
- if (config.debug) logger.info("history updater found dirty history: " + key);
- var history = parseHistoryToArray(cache);
- finishUpdateHistory(key, history, function (err, count) {
- if (err) return callback(err, null);
- if (!count) return callback(null, null);
- process.send({
- msg: 'check',
- userid: key
- });
- return callback(null, null);
- });
- }, function (err) {
- if (err) logger.error('history updater error', err);
- process.exit();
- });
-});
-
-function finishUpdateHistory(userid, history, callback) {
- models.User.update({
- history: JSON.stringify(history)
- }, {
- where: {
- id: userid
- }
- }).then(function (count) {
- return callback(null, count);
- }).catch(function (err) {
- return callback(err, null);
- });
-}
-
-function parseHistoryToArray(history) {
- var _history = [];
- Object.keys(history).forEach(function (key) {
- var item = history[key];
- _history.push(item);
- });
- return _history;
-}
-
-function parseHistoryToObject(history) {
- var _history = {};
- for (var i = 0, l = history.length; i < l; i++) {
- var item = history[i];
- _history[item.id] = item;
- }
- return _history;
-}
-
-module.exports = {
- parseHistoryToArray: parseHistoryToArray,
- parseHistoryToObject: parseHistoryToObject
-}; \ No newline at end of file