automactic

//
//  SearchTabController.swift
//  PageViewController
//
//  Created by Chris Li on 3/31/16.
//  Copyright © 2016 Chris Li. All rights reserved.
//

import UIKit

automactic

    var navBarOriginalHeight: CGFloat = 0.0
    let navBarMinHeight: CGFloat = 10.0
    var previousScrollViewYOffset: CGFloat = 0.0


// MARK: - UIScrollViewDelegate
    
    func scrollViewDidScroll(scrollView: UIScrollView) {
        guard scrollView.contentSize.height >= scrollView.frame.height else {return}
        guard let navigationBar = navigationController?.navigationBar else {return}

automactic

class Controller: UIViewController, NSFetchedResultsControllerDelegate {
    private var closures = [() -> Void]()
    let managedObjectContext = AppDelegate.persistentContainer.viewContext
    lazy var fetchedResultController: NSFetchedResultsController<Article> = {

    }()
    
    func controller(_ controller: NSFetchedResultsController<NSFetchRequestResult>, didChange anObject: Any, at indexPath: IndexPath?, for type: NSFetchedResultsChangeType, newIndexPath: IndexPath?) {
        switch type {
        case .insert:

automactic

start RabbitMQ rabbitmq-server

start Celery with detail task info celery -A api.celery worker --loglevel=info

Celery flowers celery -A api.celery flower

flask & mongo

automactic

Input:

val = 0
for i in range(0, 100):
    val ^= i
    print("{}, {}".format(i, val))

Output:

automactic

I have a db connection, which need configuration. I want to use this connection in all flask apis. So normally I would do it like this:

app = Flask(__name__)
db = Database(config_obj)

@app.route('/')
def hello():
    # a lot of code
    username = db.get_data()
 return 'Hello, {}!'.format(username)

automactic

• Forget about the concept of templates
• We create tasks directly from a json uploaded by admin, which is an array of task objects. The task object looks like below.
• Every time admin upload a new json, all executing tasks continues, all already scheduled tasks get cancelled, system is populated with tasks from new json. (We can further discuss the strategy used here)
• Database only keeps task execution history, including what is the command being executed, when task started / finished, which worker executed it, and if success or not

{
    "id": "12345-67890-qwerty",
    "command": "./build_zim.sh -args",
    "scheduling": {
 "repeat": true,

automactic

import { Component, OnInit, OnDestroy } from '@angular/core';
import { Observable, Subscription } from 'rxjs/Rx';

import { Task } from '../../model/task';

@Component({
    selector: 'tasks',
    templateUrl: './list-tasks.component.html',
    styleUrls: ['./list-tasks.component.css']
})

automactic

import { Component, OnInit, OnDestroy } from '@angular/core';
import { Observable, Subscription } from 'rxjs/Rx';

import { Task } from '../../model/task';

@Component({
    selector: 'tasks',
    templateUrl: './list-tasks.component.html',
    styleUrls: ['./list-tasks.component.css']
})

automactic

# stop all dispatcher containers
docker stop $(docker ps -q --filter "label=com.chrisshwli.zimfarm.name")

# run all dispatcher containers
docker-compose up --build -d

# run worker
docker build -t worker . && docker run -v /var/run/docker.sock:/var/run/docker.sock worker

docker run --link=zimfarm-worker-redis:redis openzim/mwoffliner mwoffliner --mwUrl=https://en.wikipedia.org/ --adminEmail=foo@bar.net