In OkHttp we expose a blocking API over a framed protocol. This document explains the code and policy that makes that work.

### Threads

#### Application's calling thread

    val newMaxFrameSize = 16777215
    val writer = Http2Writer(Buffer(), true)
    writer.applyAndAckSettings(Settings().set(Settings.MAX_FRAME_SIZE, newMaxFrameSize))
    assertThat(writer.maxDataLength()).isEqualTo(newMaxFrameSize)
    writer.frameHeader(0, newMaxFrameSize, Http2.TYPE_DATA, FLAG_NONE)
  }

  @Test fun streamIdHasReservedBit() {
    val writer = Http2Writer(Buffer(), true)

				write(v.Raw, stmt.Table)
			} else if stmt.AddError(stmt.Parse(stmt.Model)) == nil {
				write(v.Raw, stmt.Table)
			}
		} else {
			write(v.Raw, v.Name)
		}

		if v.Alias != "" {
			writer.WriteByte(' ')
			write(v.Raw, v.Alias)
		}
	case clause.Column:
		if v.Table != "" {
			if v.Table == clause.CurrentTable {
				write(v.Raw, stmt.Table)
			} else {
				write(v.Raw, v.Table)
			}

    }

    /**
     * Calculate average write latency in microseconds
     *
     * @return average write latency
     */
    public double getAverageWriteLatencyMicros() {
        long writes = rdmaWrites.get();
        if (writes == 0) {
            return 0.0;
        }
        return totalWriteTime.get() / (double) writes / 1000.0; // Convert to microseconds
    }

    /**

        StringWriter sWriter = new StringWriter();
        PrintWriter pWriter = new PrintWriter(sWriter);

        error.printStackTrace(pWriter);

        System.out.println("[" + prefix + "] " + sWriter);
    }

    private void print(String prefix, CharSequence content, Throwable error) {
        StringWriter sWriter = new StringWriter();

   * java.nio.file.Files#write(java.nio.file.Path, byte[], java.nio.file.OpenOption...)}.
   *
   * @param from the bytes to write
   * @param to the destination file
   * @throws IOException if an I/O error occurs
   */
  public static void write(byte[] from, File to) throws IOException {
    asByteSink(to).write(from);
  }

  /**

        Objects.requireNonNull(output, "output cannot be null");
        Objects.requireNonNull(settings, "settings cannot be null");

        try (Writer out = output) {
            new SettingsStaxWriter().write(out, settings.getDelegate());
        } catch (XMLStreamException e) {
            throw new IOException("Error writing settings", e);
        }

            throws ModelInterpolationException {
        StringWriter sWriter = new StringWriter(1024);

        MavenStaxWriter writer = new MavenStaxWriter();
        try {
            writer.write(sWriter, model.getDelegate());
        } catch (IOException | XMLStreamException e) {

func (z *BucketReplicationStat) EncodeMsg(en *msgp.Writer) (err error) {
	// map header, size 14
	// write "ReplicatedSize"
	err = en.Append(0x8e, 0xae, 0x52, 0x65, 0x70, 0x6c, 0x69, 0x63, 0x61, 0x74, 0x65, 0x64, 0x53, 0x69, 0x7a, 0x65)
	if err != nil {
		return
	}
	err = en.WriteInt64(z.ReplicatedSize)
	if err != nil {
		err = msgp.WrapError(err, "ReplicatedSize")
		return
	}
	// write "ReplicaSize"

var flateWriterPool sync.Pool

func newFlateWriter(w io.Writer) io.WriteCloser {
	fw, ok := flateWriterPool.Get().(*flate.Writer)
	if ok {
		fw.Reset(w)
	} else {
		fw, _ = flate.NewWriter(w, 5)
	}
	return &pooledFlateWriter{fw: fw}
}

type pooledFlateWriter struct {
	mu sync.Mutex // guards Close and Write
	fw *flate.Writer
}

func (w *pooledFlateWriter) Write(p []byte) (n int, err error) {
	w.mu.Lock()