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Update to add revision saving policy

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This commit is contained in:
Wu Cheng-Han 2016-09-18 16:50:20 +08:00
parent f2347782d8
commit 79fd2d1364
3 changed files with 26 additions and 6 deletions
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2
app.js
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@ -526,7 +526,7 @@ models.sequelize.sync().then(function () {
if (realtime.isReady()) {
models.Revision.checkAllNotesRevision(function (err, notes) {
if (err) return new Error(err);
if (notes.length <= 0) return startListen();
if (!notes || notes.length <= 0) return startListen();
});
}
});

26
lib/models/revision.js
View file

@ -167,7 +167,7 @@ module.exports = function (sequelize, DataTypes) {
checkAllNotesRevision: function (callback) {
Revision.saveAllNotesRevision(function (err, notes) {
if (err) return callback(err, null);
if (notes.length <= 0) {
if (!notes || notes.length <= 0) {
return callback(null, notes);
} else {
Revision.checkAllNotesRevision(callback);
@ -176,6 +176,7 @@ module.exports = function (sequelize, DataTypes) {
},
saveAllNotesRevision: function (callback) {
sequelize.models.Note.findAll({
// query all notes that need to save for revision
where: {
$and: [
{
@ -201,11 +202,30 @@ module.exports = function (sequelize, DataTypes) {
}
}).then(function (notes) {
if (notes.length <= 0) return callback(null, notes);
var savedNotes = [];
async.each(notes, function (note, _callback) {
Revision.saveNoteRevision(note, _callback);
// revision saving policy: note not been modified for 5 mins or not save for 10 mins
if (note.lastchangeAt && note.savedAt) {
var lastchangeAt = moment(note.lastchangeAt);
var savedAt = moment(note.savedAt);
if (moment().isAfter(lastchangeAt.add(1, 'minutes'))) {
savedNotes.push(note);
Revision.saveNoteRevision(note, _callback);
} else if (lastchangeAt.isAfter(savedAt.add(2, 'minutes'))) {
savedNotes.push(note);
Revision.saveNoteRevision(note, _callback);
} else {
return _callback(null, null);
}
} else {
savedNotes.push(note);
Revision.saveNoteRevision(note, _callback);
}
}, function (err) {
if (err) return callback(err, null);
return callback(null, notes);
// return null when no notes need saving at this moment but have delayed tasks to be done
var result = ((savedNotes.length == 0) && (notes.length > savedNotes.length)) ? null : savedNotes;
return callback(null, result);
});
}).catch(function (err) {
return callback(err, null);

4
lib/realtime.js
View file

@ -187,13 +187,13 @@ var cleaner = setInterval(function () {
if (err) return logger.error('cleaner error', err);
});
}, 60000);
var saverSleep = true;
var saverSleep = false;
// save note revision in interval
var saver = setInterval(function () {
if (saverSleep) return;
models.Revision.saveAllNotesRevision(function (err, notes) {
if (err) return logger.error('revision saver failed: ' + err);
if (notes.length <= 0) {
if (notes && notes.length <= 0) {
saverSleep = true;
return;
}