babel-node template

npm install babel-cli babel-preset-env --save-dev

{
  "presets": [
    "env"
  ]
}

 nodemon src/index.js --exec babel-node

Completely uninstall apache2 to get fresh config

apt-get remove --purge apache2 apache2-data apache2-utils

Powershell command to debug ios in chrome

remotedebug_ios_webkit_adapter --port=9000

Open safari, browse to the page that is going to be inspected. Then in chrome go to chrome://inspect/#devices and choose the device.

Copy all lastly updated files into a single directory if the version control is horribly not done by git:

Instantiate a git repository (don't need to connect to any remote branch, do everything locally). Create a .sh file at the current directory, and paste:

#!/bin/bash

git add .
git status

updatedFiles=$(git status | awk '{print $2}' | grep -P "\..*$")

touch updates/update.txt
git status > updates/update.txt

for file in $updatedFiles
do
    cp --parents "$file" ./updates
    echo "copied $file to ./updates/$file"
done;

read -p "Press enter to exit"

mkdir updates and then run the bash script above. Files will be copied into updates directory, and we can manage it by date.

如果用了 spring-boot-devtools 的話，謹記在開啟 SpringApplication 前:

public class Main {
  public static void main(String[] args) {
    System.setProperty("spring.devtools.restart.enabled", "false");
    SpringApplication.run(Main.class, args);
  }
}

不然不知為甚麼它有 restart 機制，restart 前後的同一個 class 將不視為同一個 class，database transaction 將發生錯誤。

Hilbernate Database Configuration without XML

package com.springboot.mvc;

import java.util.Properties;
import com.springboot.mvc.models.Customer;
import org.hibernate.SessionFactory;
import org.hibernate.boot.registry.StandardServiceRegistryBuilder;
import org.hibernate.cfg.Configuration;
import org.hibernate.cfg.Environment;
import org.hibernate.service.ServiceRegistry;

public class HibernateUtil {
  private static SessionFactory sessionFactory;

  public static SessionFactory getSessionFactory() {
    if (sessionFactory == null) {
      try {
        Configuration configuration = new Configuration();
        // Hibernate settings equivalent to hibernate.cfg.xml's properties
        Properties settings = new Properties();
        settings.put(Environment.DRIVER, "com.mysql.cj.jdbc.Driver");
        settings.put(Environment.URL,
            "jdbc:mysql://192.168.99.100:3306/JDBC_spring_mvc_tutorial?useSSL=false&serverTimezone=UTC");
        settings.put(Environment.USER, "cclee");
        settings.put(Environment.PASS, "ccleedb12345");
        settings.put(Environment.DIALECT, "org.hibernate.dialect.MySQL55Dialect");
        settings.put(Environment.SHOW_SQL, "true");
        settings.put(Environment.CURRENT_SESSION_CONTEXT_CLASS, "thread");
        settings.put(Environment.HBM2DDL_AUTO, "create-drop");

        configuration.setProperties(settings);
        configuration.addAnnotatedClass(Customer.class);
       // we add more and more classes here.
       
       
        ServiceRegistry serviceRegistry = new StandardServiceRegistryBuilder()
            .applySettings(configuration.getProperties()).build();
        sessionFactory = configuration.buildSessionFactory(serviceRegistry);
      } catch (Exception e) {
        e.printStackTrace();
      }
    }
    // Then:
    // Session session = sessionFactory.openSession();
    // Transaction transaction = session.beginTransaction();

    return sessionFactory;
  }
}