oofnivek

package org.example;

import org.bouncycastle.jce.provider.BouncyCastleProvider;
import org.bouncycastle.openssl.jcajce.JcaPEMWriter;
import org.bouncycastle.util.io.pem.PemObject;

import java.io.*;
import java.security.Key;
import java.security.KeyStore;
import java.security.KeyStoreException;

oofnivek

package org.example;

import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.nio.file.StandardOpenOption;

import static java.util.UUID.randomUUID;

oofnivek

package org.example;

import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Paths;

public class Main {
    public static void main(String[] args) {
        String content = "hello world";
        try {

oofnivek

package org.example;

import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;

public class Main {
    public static void main(String[] args) {
        try {

oofnivek

package com.example.demo;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import java.util.concurrent.TimeUnit;

@Configuration
public class CacheStoreBeans {

oofnivek

package com.example.demo;

import com.google.common.cache.Cache;
import com.google.common.cache.CacheBuilder;

import java.util.concurrent.TimeUnit;

public class CacheStore<T> {
    private Cache<String, T> cache;

oofnivek

package com.example.demo;

import org.springframework.stereotype.Service;

@Service
public class BookService {
    public Book getBookById(String id){
        try{
            // simulate slow retrieval from DB
            Thread.sleep(2000);

oofnivek

package com.example.demo;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class BookController {

oofnivek

package com.example.demo;

import lombok.Getter;
import lombok.Setter;

public class Book {
    @Getter
    @Setter
    private String id;

oofnivek

package common;

import java.util.Random;

public class MyRandom {
    private String alphabets = "abcdefghijklmnopqrstuvwxyz";
    private String numbers = "0123456789";
    private String alphanumerics = numbers + alphabets;

    public String randomizer(String validChars, int length){