private int msgEncodeLength(TaskMessage taskMsg) {
if (taskMsg == null) return 0;
int size = 6; // INT + SHORT
if (taskMsg.message() != null) size += taskMsg.message().length;
return size;
}
/**
* write a TaskMessage into a stream
*
* <p>Each TaskMessage is encoded as: task ... short(2) len ... int(4) payload ... byte[] *
*/
private void writeTaskMessage(ChannelBufferOutputStream bout, TaskMessage message)
throws Exception {
int payload_len = 0;
if (message.message() != null) payload_len = message.message().length;
int task_id = message.task();
if (task_id > Short.MAX_VALUE)
throw new RuntimeException("Task ID should not exceed " + Short.MAX_VALUE);
bout.writeShort((short) task_id);
bout.writeInt(payload_len);
if (payload_len > 0) bout.write(message.message());
}