### Holding multiple locks

You're allowed to take the Http2Connection lock while holding the Http2Writer lock. But not vice-versa. Because taking the Http2Writer lock can block.

     * to launch the ThumbnailGenerator in a separate process.
     *
     * @throws JobProcessingException if the thumbnail generation process fails
     */
    protected void executeThumbnailGenerator() {
        final List<String> cmdList = new ArrayList<>();
        final String cpSeparator = SystemUtils.IS_OS_WINDOWS ? ";" : ":";

    //                                                                   =================
    @Override
    public void acceptPrimaryKeyMap(Entity entity, Map<String, ? extends Object> primaryKeyMap) {
    }

    @Override
    public void acceptAllColumnMap(Entity entity, Map<String, ? extends Object> allColumnMap) {
    }

    @Override

        return body.contentType();
      }

      @Override public long contentLength() {
        return -1; // We don't know the compressed length in advance!
      }

      @Override public void writeTo(BufferedSink sink) throws IOException {
        BufferedSink gzipSink = Okio.buffer(new GzipSink(sink));
        body.writeTo(gzipSink);
        gzipSink.close();
      }
    };
  }
}
```

  }

  /**
   * Throws an IllegalArgumentException if the ordering of {@code endpoints} is not compatible with
   * the directionality of this graph.
   */
  protected final void validateEndpoints(EndpointPair<?> endpoints) {
    checkNotNull(endpoints);
    checkArgument(isOrderingCompatible(endpoints), ENDPOINTS_MISMATCH);
  }

     *     at java.net.URL.<init>(URL.java:330)
     *     at jcifs.smb.SmbFile.<init>(SmbFile.java:355)
     *     ...
     * </pre>
     * </blockquote>
     */
    public static void registerSmbURLHandler() {
        SingletonContext.registerSmbURLHandler();
    }

    /**
     * Retrieve an <code>int</code>. If the key does not exist or

        bi += 2;
        access = ServerMessageBlock.readInt4(buf, bi);
        bi += 4;
        sid = new SID(buf, bi);
        return size;
    }

    void appendCol(final StringBuffer sb, final String str, final int width) {
        sb.append(str);
        final int count = width - str.length();
        for (int i = 0; i < count; i++) {
            sb.append(' ');
        }

    }

    /**
     * Closes this input stream and releases any system resources associated with the stream.
     *
     * @throws IOException if a network error occurs
     */

    @Override
    public void close() throws IOException {
        try {
            file.close();
            tmp = null;
        } catch (final SmbException se) {
            throw seToIoe(se);
        }
    }

    /**

        suite.addTest(testerSuite);
      }
    }
    return suite;
  }

  /** Throw {@link IllegalStateException} if {@link #createTestSuite()} can't be called yet. */
  protected void checkCanCreate() {
    if (subjectGenerator == null) {
      throw new IllegalStateException("Call using() before createTestSuite().");
    }
    if (name == null) {

  }

  /**
   * Throws an IllegalArgumentException if the ordering of {@code endpoints} is not compatible with
   * the directionality of this graph.
   */
  protected final void validateEndpoints(EndpointPair<?> endpoints) {
    checkNotNull(endpoints);
    checkArgument(isOrderingCompatible(endpoints), ENDPOINTS_MISMATCH);
  }