private byte[] writePartialFile(DataOutputStream out) throws IOException {
MessageQueue.Message m1 =
MessageQueue.Message.newBuilder()
.setTime(1)
.setPayload(ByteString.copyFromUtf8("test 1"))
.build();
out.writeInt(m1.getSerializedSize());
m1.writeTo(out);
MessageQueue.Message m2 =
MessageQueue.Message.newBuilder()
.setTime(2)
.setPayload(ByteString.copyFromUtf8("test 2"))
.build();
out.writeInt(m2.getSerializedSize());
m2.writeTo(out);
MessageQueue.Message m3 =
MessageQueue.Message.newBuilder()
.setTime(3)
.setPayload(ByteString.copyFromUtf8("test 3"))
.build();
byte[] bytes = m3.toByteArray();
out.writeInt(bytes.length);
out.write(bytes, 0, 6);
out.flush();
return bytes;
}