VarunVats9

import java.time.LocalDateTime;
import java.time.OffsetDateTime;

public class RequestEntry {

    private LocalDateTime localDateTime;

    public RequestEntry(final LocalDateTime localDateTime) {
        localDateTime.toEpochSecond(OffsetDateTime.now().getOffset());
        this.localDateTime = localDateTime;

VarunVats9

1. Run the application : a) Either do --> java -jar path_to_userfeed.jar b) Or if have maven --> mvn spring-boot:run

2. Once done, run a curl command (POST) localhost:8080/setup?userId=1 [This will set the friends (follower) list (2, 3) for this user.]

3. Now, you can create posts for this user, run a curl command (POST) localhost:8080/post a) This requires JSON to be send as requestBody, for example : { "userId" : 1

VarunVats9

package com.practice.codingblocks;

import java.util.HashMap;
import java.util.HashSet;


public class SlidingWindow {

    private static int maximumWindowSum(int[] arr, int k) {

VarunVats9

Complete ES Guide

• Getting Started
• Managing Documents
• Mapping
• Analysis & Analyzers
• Introduction to Searching
• Term Level Queries
• Full Text Queries
• [Adding Boolean Logic to Queries](https://github.com/codingexplained/complete-guide-to-elasticsearch/tree/

VarunVats9

Reference:
https://opensourceconnections.com/blog/2013/07/24/understanding-how-cql3-maps-to-cassandras-internal-data-structure-sets-lists-and-maps/


// Column-Family
-----------------------------------------------------------------------------------------------
ID         Last    First   Bonus
 1          Doe     John    8000
 2          Smith   Jane    4000
 3          Beck    Sam     1000

VarunVats9

// Term queries don't analyze the query, just search for the exact term in the inverted index >>>>>>>>>
  "query": {
    "term": {
      "name": "Framework"
    }
  }
}

GET /product/_search
{

VarunVats9

// Add another field
PUT /product/_mapping >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
{
  "properties": {
    "date": {
      "type": "date",
      "format": "yyyy-MM-dd"
    }
  }
}

VarunVats9

// MATCH == SHOULD
GET /product/_search >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
{
  "query": {
    "match": {
      "name": "Spring Title"
    }
  }
}

VarunVats9

// Elasticsearch API
https://www.elastic.co/guide/en/elasticsearch/reference/current/docs.html

// Typeless API
https://www.elastic.co/blog/moving-from-types-to-typeless-apis-in-elasticsearch-7-0

// Mapping  >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
PUT /product
{
  "mappings": {

VarunVats9

// Mapping
PUT /department >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
{
  "mappings": {
    "properties": {
      "join_field": { 
        "type": "join",
        "relations": {
          "department": "employee"
        }