Пример #1
0
  /**
   * Test concurrent reader and writer (GH-458).
   *
   * <p><b>Test case:</b>
   *
   * <ol>
   *   <li/>start a long running reader;
   *   <li/>try to start a writer: it should time out;
   *   <li/>stop the reader;
   *   <li/>start the writer again: it should succeed.
   * </ol>
   *
   * @throws Exception error during request execution
   */
  @Test
  @Ignore("There is no way to stop a query on the server!")
  public void testReaderWriter() throws Exception {
    final String readerQuery = "?query=(1%20to%20100000000000000)%5b.=1%5d";
    final String writerQuery = "/test.xml";
    final byte[] content = Token.token("<a/>");

    final Get readerAction = new Get(readerQuery);
    final Put writerAction = new Put(writerQuery, content);

    final ExecutorService exec = Executors.newFixedThreadPool(2);

    // start reader
    exec.submit(readerAction);
    Performance.sleep(TIMEOUT); // delay in order to be sure that the reader has started
    // start writer
    Future<HTTPResponse> writer = exec.submit(writerAction);

    try {
      final HTTPResponse result = writer.get(TIMEOUT, TimeUnit.MILLISECONDS);

      if (result.status.isSuccess()) fail("Database modified while a reader is running");
      throw new Exception(result.toString());
    } catch (final TimeoutException e) {
      // writer is blocked by the reader: stop it
      writerAction.stop = true;
    }

    // stop reader
    readerAction.stop = true;

    // start the writer again
    writer = exec.submit(writerAction);
    assertEquals(HTTPCode.CREATED, writer.get().status);
  }
Пример #2
0
  /**
   * Test concurrent writers (GH-458).
   *
   * <p><b>Test case:</b>
   *
   * <ol>
   *   <li/>start several writers one after another;
   *   <li/>all writers should succeed.
   * </ol>
   *
   * @throws Exception error during request execution
   */
  @Test
  public void testMultipleWriters() throws Exception {
    final int count = 10;
    final String template =
        "<?xml version=\"1.0\" encoding=\"UTF-8\"?>"
            + "<command xmlns=\"http://basex.org/rest\"><text><![CDATA["
            + "ADD TO %1$d <node id=\"%1$d\"/>"
            + "]]></text></command>";

    @SuppressWarnings("unchecked")
    final Future<HTTPResponse>[] tasks = new Future[count];
    final ExecutorService exec = Executors.newFixedThreadPool(count);

    // start all writers (not at the same time, but still in parallel)
    for (int i = 0; i < count; i++) {
      final String command = String.format(template, i);
      tasks[i] = exec.submit(new Post("", Token.token(command)));
    }

    // check if all have finished successfully
    for (final Future<HTTPResponse> task : tasks) {
      assertEquals(HTTPCode.OK, task.get(TIMEOUT, TimeUnit.MILLISECONDS).status);
    }
  }