import java.io.*;

public class Dfs {

    static class CacheEntry {
        long expiration;
        HashMap map;

        CacheEntry(long ttl) {
            if (ttl == 0)
                ttl = Dfs.TTL;
            expiration = System.currentTimeMillis() + ttl * 1000L;
            map = new HashMap();
        }
    }

    static LogStream log = LogStream.getInstance();

                + ",path=" + this.path + ",ttl=" + this.ttl + ",expiration=" + this.expiration + ",remain="
                + ( this.expiration - System.currentTimeMillis() ) + "]";
    }


    /**
     * @return the ttl
     */
    public long getTtl () {
        return this.ttl;
    }


    /**
     * {@inheritDoc}
     *

                    + ",recordType=" + recordTypeString + ",recordClass="
                    + ( this.recordClass == IN ? "IN" : "0x" + Hexdump.toHexString(this.recordClass, 4) ) + ",ttl=" + this.ttl + ",rDataLength="
                    + this.rDataLength);
    }

                ",recordType=" + recordTypeString +
                ",recordClass=" + ( recordClass == IN ? "IN" :
                            "0x" + Hexdump.toHexString( recordClass, 4 )) +
                ",ttl=" + ttl +
                ",rDataLength=" + rDataLength );
    }

        long expiration = System.currentTimeMillis() + Dfs.TTL * 1000;

        int di = 0;
        for ( ;; ) {
                        /* NTLM HTTP Authentication must be re-negotiated
                         * with challenge from 'server' to access DFS vol. */
            dr.resolveHashes = auth.hashesExternal;
            dr.ttl = resp.referrals[di].ttl;
            dr.expiration = expiration;

        CacheEntry ( long ttl ) {
            this.expiration = System.currentTimeMillis() + ttl * 1000L;
            this.map = new ConcurrentHashMap<>();
        }
    }

    private static class NegativeCacheEntry <T> extends CacheEntry<T> {

        /**
         * @param ttl
         */
        NegativeCacheEntry ( long ttl ) {
            super(ttl);
        }

    }

}

func runDNSCache(ctx *cli.Context) {
	dnsTTL := ctx.Duration("dns-cache-ttl")
	// Check if we have configured a custom DNS cache TTL.
	if dnsTTL <= 0 {
		if orchestrated {
			dnsTTL = 30 * time.Second
		} else {
			dnsTTL = 10 * time.Minute
		}
	}

	// Call to refresh will refresh names in cache.

	cli.StringFlag{
		Name:   "interface",
		Usage:  "bind to right VRF device for MinIO services",
		Hidden: true,
		EnvVar: "MINIO_INTERFACE",
	},
	cli.DurationFlag{
		Name:   "dns-cache-ttl",
		Usage:  "custom DNS cache TTL",
		Hidden: true,
		Value: func() time.Duration {
			if orchestrated {
				return 30 * time.Second
			}
			return 10 * time.Minute
		}(),
		EnvVar: "MINIO_DNS_CACHE_TTL",
	},

 */
public interface Configuration {

    /**
     * 
     * @return random source to use
     */
    SecureRandom getRandom ();


    /**
     * 
     * 
     * Property <tt>jcifs.smb.client.dfs.ttl</tt> (int, default 300)
     * 
     * @return title to live, in seconds, for DFS cache entries
     */
    long getDfsTtl ();


    /**
     * 

public class AzureAdAuthenticator implements SsoAuthenticator {

    private static final Logger logger = LogManager.getLogger(AzureAdAuthenticator.class);

    protected static final String AZUREAD_STATE_TTL = "aad.state.ttl";

    protected static final String AZUREAD_AUTHORITY = "aad.authority";

    protected static final String AZUREAD_TENANT = "aad.tenant";

    protected static final String AZUREAD_CLIENT_SECRET = "aad.client.secret";