alejandro-du

############################################################################################
# 1. Create the operational table (users) and the cache table (users_session_cache).
# Make sure that the cache table uses MariaDB's MEMORY storage engine.
############################################################################################

CREATE OR REPLACE TABLE users(
	id SERIAL PRIMARY KEY,
	name VARCHAR(50) NOT NULL UNIQUE,
	session_id VARCHAR(50)
) ENGINE=InnoDB;

alejandro-du

version: '3.8'

services:
  mariadb-server:
    image: mariadb:latest
    hostname: mariadb-server
    environment:
      MARIADB_ROOT_PASSWORD: RootPassword123!
      EDITOR: mcedit
    command: >

alejandro-du

import random
import os
import subprocess
from datetime import datetime, timedelta

# Function to generate a random date within a given range
def random_date(start, end):
    return start + timedelta(days=random.randint(0, int((end - start).days)))

# Function to execute a given SQL command using MariaDB

alejandro-du

# Set up the MariaDB repository for version 11.1 to ensure the system uses the correct version and receives updates from the official source.
curl -LsS https://r.mariadb.com/downloads/mariadb_repo_setup | sudo bash -s -- --mariadb-server-version=11.1

# Install the necessary MariaDB packages along with ColumnStore for fast and scalable analytics and CMAPI for managing ColumnStore nodes.
sudo dnf -y install MariaDB MariaDB-columnstore-engine MariaDB-columnstore-cmapi

# Automatically start MariaDB and its ColumnStore storage engine when the system boots, ensuring database availability after restarts.
sudo systemctl enable mariadb
sudo systemctl enable mariadb-columnstore-cmapi

alejandro-du

version: "3.9"
services:
  mariadb-community:
    image: alejandrodu/mariadb
    environment:
      - MARIADB_CREATE_DATABASE=demo
      - MARIADB_CREATE_USER=user:Password123!
      - MARIADB_CREATE_MAXSCALE_USER=maxscale_user:MaxScalePassword123!

  maxscale:

alejandro-du

#!/bin/bash

# find the mount point with sudo fdisk -l
mount /dev/mmcblk0p1 /media/sdcard/
 
rm /media/sdcard/boot/armbian_first_run.txt.template
touch /media/sdcard/boot/armbian_first_run.txt
 
echo "FR_general_delete_this_file_after_completion=1" >> /media/sdcard/boot/armbian_first_run.txt
echo "FR_net_change_defaults=1" >> /media/sdcard/boot/armbian_first_run.txt

alejandro-du

import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.hibernate.engine.jdbc.connections.internal.ConnectionProviderInitiator;
import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;

@SpringBootTest
class ApplicationTests {

alejandro-du

<?xml version="1.0" encoding="UTF-8"?>
<jmeterTestPlan version="1.2" properties="5.0" jmeter="5.4.1">
  <hashTree>
    <TestPlan guiclass="TestPlanGui" testclass="TestPlan" testname="Test Plan" enabled="true">
      <stringProp name="TestPlan.comments"></stringProp>
      <boolProp name="TestPlan.functional_mode">false</boolProp>
      <boolProp name="TestPlan.serialize_threadgroups">false</boolProp>
      <elementProp name="TestPlan.user_defined_variables" elementType="Arguments" guiclass="ArgumentsPanel" testclass="Arguments" testname="User Defined Variables" enabled="true">
        <collectionProp name="Arguments.arguments"/>
      </elementProp>

alejandro-du

Workshop sobre Vaadin en Español

Comentario.java

package com.example.backend;

import java.time.LocalDateTime;
import java.util.Objects;

alejandro-du

ComboBox<Object> comboBox = new ComboBox<>();
comboBox.addClassName("red-combo-box");

<dom-module id="custom-combo-box-styles" theme-for="vaadin-combo-box">
    <template>
        <style>
 :host(.red-combo-box) [part="text-field"] {