protected UUID postCommand(String command, int version, Object payload) throws IOException {
CommandObject cmdObj = new CommandObject();
cmdObj.setCommand(command);
cmdObj.setVersion(version);
cmdObj.setPayload(payload);
String json = connector.toJSON(cmdObj);
Map<String, String> params = new HashMap<String, String>();
params.put("payload", json);
try {
MessageDigest md = MessageDigest.getInstance("SHA-1");
params.put("checksum", Hex.encodeHexString(md.digest(json.getBytes(HttpConnector.UTF_8))));
} catch (NoSuchAlgorithmException e) {
throw new IllegalArgumentException(e);
}
CommandResponse response = connector.post("/commands/", params, CommandResponse.class);
return response == null ? null : UUID.fromString(response.getUuid());
}
