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Introduction to ElasticSearch:

Elastic is a search server based on Apache Lucene, and provides a distributable full text search engine that’s accessible through a restful interface.

ElasticSearch is schema-less, and uses JSON instead of XML. It is open-source and built in Java, which means you can run ElasticSearch on any platform, as Java is platform independent.

ElasticSearch is a document-based store. It is an alternative to traditional document stores, so it can be used to replace other document stores like MongoDB or RavenDB.

Fast and Scalable:

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Elastic Search

• Getting started
  • Getting started - Concepts
  • Glossary
  • APIs
    • Index and Query a Documented
    • Modifying your data
    • Updating Documents
• Batch Processing

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import org.springframework.http.HttpMethod;
import org.springframework.http.codec.ServerCodecConfigurer;
import org.springframework.security.authentication.ReactiveAuthenticationManager;
import org.springframework.security.web.server.authentication.AuthenticationWebFilter;
import org.springframework.security.web.server.util.matcher.ServerWebExchangeMatchers;

public class LoginWebFilter extends AuthenticationWebFilter {
    private final ServerCodecConfigurer serverCodecConfigurer;

    /**

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Design and Development

• Encapsulation: I Don’t Think it Means What You Think it Means
• Exercises in Kotlin: Part 4 – Control Flows and Return
• Test Estimation Techniques (If You Must…)
• API microservices, the Unix philosophy, and the Richardson Maturity Model
• Microsoft integrates Xamarin into Visual Studio for free, will open source Xamarin runtime
• JUnit 5 – Extension Model
• First Preview of Android N: Developer APIs & Tools
• Smashing the Stack for Fun & Profit : Revived
• Serverless Architectures

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What is Redis?
Redis is an open source, advanced in-memory key-value store. It is often referred to as a data structure server since keys can contain strings, hashes, lists, sets and sorted sets.

######1. If you're running OS X, install redis in terminal using Homebrew : brew install redis

######2. Add the redis and hiredis gems to the project's Gemfile (remember to bundle install after you do this) :

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Rails 5.1 introduces a new way of coding JavaScript. You would use yarn, webpack and a new folder, app/javascript.

Setup

If you want to stick with the "old" way (before 5.1) and use the asset pipeline, you need to do this:

# Gemfile

gem 'sprockets', '>= 3.0.0'

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List<Map<String, Object>> rows = new ArrayList<Map<String, Object>>();
ResultSetMetaData metaData = resultSet.getMetaData();
int columnCount = metaData.getColumnCount();

while (resultSet.next()) {
    Map<String, Object> columns = new LinkedHashMap<String, Object>();

    for (int i = 1; i <= columnCount; i++) {
        columns.put(metaData.getColumnLabel(i), resultSet.getObject(i));
    }

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System Design Cheatsheet

Picking the right architecture = Picking the right battles + Managing trade-offs

Basic Steps

1. Clarify and agree on the scope of the system

• User cases (description of sequences of events that, taken together, lead to a system doing something useful)
  • Who is going to use it?
  • How are they going to use it?

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UPDATE wp_options SET option_value = replace(option_value, 'http://oldurl', 'http://newurl') WHERE option_name = 'home' OR option_name = 'siteurl';

UPDATE wp_posts SET guid = replace(guid, 'http://oldurl', 'http://newurl');

UPDATE wp_posts SET post_content = replace(post_content, 'http://oldurl', 'http://newurl');

UPDATE wp_postmeta SET meta_value = REPLACE (meta_value, 'http://oldurl','http://newurl');

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import java.io._
import java.util.zip._

val pi = new PipedInputStream        
val po = new PipedOutputStream(pi)
val zo = new GZIPOutputStream(po)
val zi = new GZIPInputStream(pi)
val w  = new PrintWriter(zo)
val r  = new BufferedReader(new InputStreamReader(zi))