hsynercn

import java.util.ArrayList;
import java.util.LinkedList;
import java.util.List;
import java.util.Queue;
import java.util.stream.Collectors;

public class ConnectionPool {
    private static final int RESOURCE_RETRIEVAL_TRY_COUNT = 10;
    private static final int RESOURCE_RETRIEVAL_WAIT_PERIOD = 1000;
    private static final int POOL_SIZE = 10;