import java.util.HashMap;

import java.util.List;

import java.util.Map;

public class UrlCache {

private final Map<String, List<String>> cache = new HashMap<>(); // Cache to store URL lists

private final int cacheSizeLimit;

public UrlCache(int cacheSizeLimit) {

this.cacheSizeLimit = cacheSizeLimit;

}

/**

* Retrieves a list of URLs for a given environment.

*

* @param environment The environment (e.g., "staging").

* @return A list of URLs, or null if not found in the cache.

*/

public List<String> getUrls(String environment) {

if (!cache.containsKey(environment)) {

return null; // Not in cache

}

return cache.get(environment);

}

/**

* Adds a list of URLs to the cache for a given environment.

*

* @param environment The environment (e.g., "staging").

* @param urls The list of URLs to cache.

*/

public void setUrls(String environment, List<String> urls) {

if (cache.size() >= cacheSizeLimit) {

// Remove the least recently used entry (simplistic eviction)

String firstKey = cache.keySet().iterator().next();

cache.remove(firstKey);

}

cache.put(environment, urls);

}

public static void main(String[] args) {

UrlCache cache = new UrlCache(2); // Cache size limit of 2

List<String> stagingUrls1 = List.of("https://staging.example.com/page1", "https://staging.example.com/page2");

cache.setUrls("staging", stagingUrls1);

List<String> stagingUrls2 = List.of("https://staging.example.com/page3", "https://staging.example.com/page4");

cache.setUrls("staging", stagingUrls2); // This will evict one of the old URLs

List<String> retrievedUrls = cache.getUrls("staging");

System.out.println(retrievedUrls); // Output: [https://staging.example.com/page3, https://staging.example.com/page4] or similar order

List<String> stagingUrls3 = cache.getUrls("staging");

System.out.println(stagingUrls3); //Output: [https://staging.example.com/page3, https://staging.example.com/page4] or similar order

}

}