throwIf(OPEN_THROWS);
  }

  public boolean closed() {
    return closed;
  }

  @Override
  public void write(byte[] b, int off, int len) throws IOException {
    throwIf(closed);
    throwIf(WRITE_THROWS);
    super.write(b, off, len);
  }

  @Override
  public void write(int b) throws IOException {
    throwIf(closed);
    throwIf(WRITE_THROWS);
    super.write(b);
  }

	// responses from the remote server.
	// Channel will be closed after error or when remote closes.
	// responses *must* be read to either an error is returned or the channel is closed.
	responses *Stream
	newResp   func() Resp

	// Requests sent to the server.
	// If the handler is defined with 0 incoming capacity this will be nil.
	// Channel *must* be closed to signal the end of the stream.

        ImmutableRangeSet.<Integer>builder()
            .add(Range.closed(5, 8))
            .add(Range.closedOpen(1, 3))
            .build();

    assertThat(rangeSet.asRanges())
        .containsExactly(Range.closedOpen(1, 3), Range.closed(5, 8))
        .inOrder();

    assertTrue(rangeSet.intersects(Range.closed(1, 2)));
    assertTrue(rangeSet.intersects(Range.open(5, 8)));

 * Features:
 * - Simple state management (CLOSED, OPEN, HALF_OPEN)
 * - Lock-free atomic operations
 * - Configurable thresholds and timeouts
 * - No complex dependencies
 */
public class SimpleCircuitBreaker {

    private static final Logger log = LoggerFactory.getLogger(SimpleCircuitBreaker.class);

    /**
     * Circuit breaker states
     */
    public enum State {
        CLOSED, // Normal operation

        // Need successThreshold (2) consecutive successes to close the circuit
        // Second success should close the circuit (threshold is 2)
        result = circuitBreaker.executeWithCircuitBreaker(() -> "success 1");
        assertEquals("success 1", result, "Should execute second success");
        assertEquals(State.CLOSED, circuitBreaker.getState(), "Circuit should be CLOSED after success threshold");

        } finally {
            CloseableUtil.close(os);
        }
    }

    // ////////////////////////////////////////////////////////////////
    // from InputStream to StringBuilder
    //
    /**
     * Copies from an input stream to a {@link StringBuilder} using the platform default encoding.
     * <p>
     * The input stream is not closed.
     * </p>
     *

   * most [BufferedSource] instances, but not of [Buffer].
   */
  private fun responseBody(content: String): ResponseBody {
    val data = Buffer().writeUtf8(content)
    val source: Source =
      object : Source {
        var closed = false

        override fun close() {
          closed = true
        }

        override fun read(

    withLock {
      cancel = !source.finished && source.closed && (sink.finished || sink.closed)
      open = isOpen
    }
    if (cancel) {
      // RST this stream to prevent additional data from being sent. This is safe because the input
      // stream is closed (we won't use any further bytes) and the output stream is either finished
      // or closed (so RSTing both streams doesn't cause harm).

 * ("open"). If a range is unbounded on a side, it is neither open nor closed on that side; the
 * bound simply does not exist.
 *
 * @since 10.0
 */
@GwtCompatible
public enum BoundType {
  /** The endpoint value <i>is not</i> considered part of the set ("exclusive"). */
  OPEN(false),
  CLOSED(true);

  final boolean inclusive;

	}

	return nil, ErrInvalidDB
}

// Close closes all prepared statements in the store
func (db *PreparedStmtDB) Close() {
	db.Mux.Lock()
	defer db.Mux.Unlock()

	for _, key := range db.Stmts.Keys() {
		db.Stmts.Delete(key)
	}
}

// Reset Deprecated use Close instead
func (db *PreparedStmtDB) Reset() {
	db.Close()
}