import jcifs.FileNotifyInformation;
import jcifs.internal.NotifyResponse;
import jcifs.internal.SMBProtocolDecodingException;

/**
 * Response for SMB1 NT Transaction change notification.
 *
 * This response contains file system change notifications that occurred
 * in the monitored directory, such as file creation, modification, or deletion.
 */
public class NtTransNotifyChangeResponse extends SmbComNtTransactionResponse implements NotifyResponse {

        // Verify token content at the security buffer offset
        int securityBufferOffset = SMBUtil.readInt2(buffer, bodyOffset + 12);
        byte[] actualToken = new byte[TEST_TOKEN.length];
        System.arraycopy(buffer, headerStart + securityBufferOffset, actualToken, 0, TEST_TOKEN.length);
        assertArrayEquals(TEST_TOKEN, actualToken);
    }

    @Test

     * @param tempFile The temporary file.
     */
    protected void asyncImport(final String fileName, final File tempFile) {
        final int fileType;
        if (fileName.startsWith("system") && fileName.endsWith(".properties")) {
            fileType = 1;
        } else if (fileName.startsWith("gsa") && fileName.endsWith(".xml")) {
            fileType = 2;
        } else if (fileName.endsWith(".bulk")) {

        if (authenticator != null && fessConfig.getSystemPropertyAsBoolean(SPNEGO_INITIALIZED, false)) {
            return authenticator;
        }
        try {
            // set some System properties
            final SpnegoFilterConfig config = SpnegoFilterConfig.getInstance(new SpengoConfig());

            // pre-authenticate
            authenticator = new org.codelibs.spnego.SpnegoAuthenticator(config);

            final String sessionId = crawler.execute();

            // Wait for crawler to start running with polling
            long startTime = System.currentTimeMillis();
            while (crawler.crawlerContext.getStatus() != CrawlerStatus.RUNNING && System.currentTimeMillis() - startTime < 5000) {
                try {
                    Thread.sleep(50);
                } catch (InterruptedException e) {

    Request request = new Request.Builder()
        .url("https://publicobject.com/helloworld.txt")
        .build();

    try (Response response = client.newCall(request).execute()) {
      System.out.println(response.request().header("Date"));
    }
  }

  static class CurrentDateInterceptor implements Interceptor {
    @Override public Response intercept(Chain chain) throws IOException {

        .build();

    try (Response response = client.newCall(request).execute()) {
      if (!response.isSuccessful()) throw new IOException("Unexpected code " + response);

      System.out.println(response.body().string());
    }
  }

  public static void main(String... args) throws Exception {
    new PostString().run();
  }

De esta manera, puedes crear un token con una expiración de, digamos, 1 semana. Y luego, cuando el usuario regresa al día siguiente con el token, sabes que el usuario todavía está registrado en tu sistema.

    Preconditions.checkNotNull(buffer);
    /*
     * This code performs one System.nanoTime() more than necessary, and in return, the time to
     * execute Queue#drainTo is not added *on top* of waiting for the timeout (which could make
     * the timeout arbitrarily inaccurate, given a queue that is slow to drain).
     */
    long deadline = System.nanoTime() + unit.toNanos(timeout);
    int added = 0;
    while (added < numElements) {

            }

            System.arraycopy(txn_buf, bufParameterOffset, dst, dstIndex, parameterCount);
            dstIndex += parameterCount;
        }

        if (dataCount > 0) {
            p = pad1;
            while (p-- > 0) {
                dst[dstIndex] = (byte) 0x00; // Pad1
                dstIndex++;
            }
            System.arraycopy(txn_buf, bufDataOffset, dst, dstIndex, dataCount);