private static byte[] getMimeType(final DirectBuffer directBuffer, final int fieldOffset) {
final int length = directBuffer.getByte(fieldOffset);
final byte[] bytes = new byte[length];
directBuffer.getBytes(fieldOffset + 1, bytes);
return bytes;
}
@Test
public void shouldEncodeCorrectly() {
final ByteBuffer encodedMsgBuffer = ByteBuffer.allocateDirect(MSG_BUFFER_CAPACITY);
encodeTestMessage(encodedMsgBuffer);
final DirectBuffer decodeBuffer = new UnsafeBuffer(encodedMsgBuffer);
int offset = 0;
assertThat(decodeBuffer.getShort(offset), is((short) 22));
offset += BitUtil.SIZE_OF_SHORT;
assertThat(decodeBuffer.getShort(offset), is((short) 1));
offset += BitUtil.SIZE_OF_SHORT;
assertThat(decodeBuffer.getShort(offset), is((short) 3));
offset += BitUtil.SIZE_OF_SHORT;
assertThat(decodeBuffer.getShort(offset), is((short) 0));
offset += BitUtil.SIZE_OF_SHORT;
assertThat(decodeBuffer.getByte(offset), is((byte) 10));
offset += BitUtil.SIZE_OF_BYTE;
assertThat(decodeBuffer.getByte(offset), is((byte) 42));
offset += BitUtil.SIZE_OF_BYTE;
assertThat(decodeBuffer.getInt(offset), is(0x00_01_00_00));
offset += BitUtil.SIZE_OF_INT;
assertThat(decodeBuffer.getLong(offset), is(101L));
offset += BitUtil.SIZE_OF_LONG;
assertThat(decodeBuffer.getLong(offset), is(202L));
}
public static int payloadOffset(final DirectBuffer directBuffer, final int offset) {
int fieldOffset = offset + METADATA_MIME_TYPE_LENGTH_OFFSET;
final int metadataMimeTypeLength = directBuffer.getByte(fieldOffset);
fieldOffset += 1 + metadataMimeTypeLength;
final int dataMimeTypeLength = directBuffer.getByte(fieldOffset);
fieldOffset += 1 + dataMimeTypeLength;
return fieldOffset;
}
private static void pongHandler(
final DirectBuffer buffer, final int offset, final int length, final Header header) {
final long pingTimestamp = buffer.getLong(offset);
final long rttNs = System.nanoTime() - pingTimestamp;
HISTOGRAM.recordValue(rttNs);
}
public static String dataMimeType(final DirectBuffer directBuffer, final int offset) {
int fieldOffset = offset + METADATA_MIME_TYPE_LENGTH_OFFSET;
fieldOffset += 1 + directBuffer.getByte(fieldOffset);
final byte[] bytes = getMimeType(directBuffer, fieldOffset);
return new String(bytes, StandardCharsets.UTF_8);
}
public static int keepaliveInterval(final DirectBuffer directBuffer, final int offset) {
return directBuffer.getInt(offset + KEEPALIVE_INTERVAL_FIELD_OFFSET, ByteOrder.BIG_ENDIAN);
}
public static int version(final DirectBuffer directBuffer, final int offset) {
return directBuffer.getInt(offset + VERSION_FIELD_OFFSET, ByteOrder.BIG_ENDIAN);
}
public static int maxLifetime(final DirectBuffer directBuffer, final int offset) {
return directBuffer.getInt(offset + MAX_LIFETIME_FIELD_OFFSET, ByteOrder.BIG_ENDIAN);
}
public void wrap(final DirectBuffer buffer, final int offset) {
if (buffer.getInt(offset) != type().ordinal()) {
throw new IllegalArgumentException("Buffer must contain message type " + type());
}
super.wrap(buffer, offset);
}